METHOD FOR RECOVERING PRECIOUS METALS AND COPPER FROM LEACH SOLUTIONS

The present disclosure is directed to a process for recovering a precious metal from a pregnant leach solution using a resin extractant. The precious metal is eluted from the loaded resin using an eluant comprising trithionate. The barren resin is contacted with a sulfide, bisulfide, and/or polysulfide to convert sorbed trithionate to thiosulfate. The desorbed thiosulfate is contacted with an oxidant and converted to trithionate for eluant recycle. 1. A method , comprising:(a) contacting a precious metal-containing solution with a barren resin to form a precious metal-loaded resin and a precious metal barren solution;(b) contacting the precious metal-loaded resin with a precious metal eluant comprising a trithionate to form a precious metal-rich eluant and a barren resin comprising trithionate;(c) contacting the barren resin with at least one of a sulfide, bisulfide and polysulfide to convert at least a portion of the trithionate into thiosulfate; and(d) contacting the thiosulfate with an oxidant to convert at least a portion of the thiosulfate into a trithionate for recycle to step (b) as an eluant component.2. The method of claim 1 , wherein at least most of the trithionate on the barren resin is converted into thiosulfate and wherein at least most of the thiosulfate from contacting step (c) is converted by the oxidant into the trithionate.3. The method of claim 2 , wherein a sulfite ion concentration in the precious metal eluant is at least about 0.01 M claim 2 , wherein a pH of the precious metal eluant is maintained within a range of from about pH 4.5 to about pH 14 claim 2 , and wherein a trithionate concentration in the precious metal eluant is at least about 0.0120 M.4. The method of claim 3 , wherein the sulfite ion concentration in the precious metal eluant is at least about 0.1 M and the trithionate concentration in the precious metal eluant is at least about 0.05 M.5. The method of claim 4 , wherein the sulfite ion concentration in the precious metal ...

Method for recovering gold by solvent extraction

The invention relates to a method for recovering gold by solvent extraction from an acidic chloride-containing aqueous solution or from slurry containing gold-bearing solids using a diester-based reagent that is poorly soluble in water as organic extraction solution. In accordance with the method, gold is extracted extremely effectively, but other precious metals and many other metals quite sparingly. Gold is stripped from the extraction phase with pure water, from which the gold can be reduced either chemically or electrochemically.

METHOD FOR SEPARATION OF CHEMICALLY PURE OS FROM METAL MIXTURES

A method for separating an amount of osmium from a mixture containing the osmium and at least one other additional metal is provided. In particular, method for forming and trapping OsOto separate the osmium from a mixture containing the osmium and at least one other additional metal is provided. 1. A method of separating an amount of osmium from a mixture comprising the amount of osmium and at least one additional metal , the method comprising:{'sub': '4', 'a. contacting the mixture with an oxidizing solution to form a volatile OsOvapor;'}{'sub': 4', '2', '4', '2, 'b. bubbling the OsOvapor through a KOH trapping solution to form an amount of K[OsO(OH)] dissolved in the KOH trapping solution;'}{'sub': 2', '4', '2, 'c. contacting the dissolved K[OsO(OH)] with a reducing agent to form an Os precipitate; and'}d. separating the Os precipitate from the KOH trapping solution.2. The method of claim 1 , wherein the mixture is an irradiated Os-190 metal target claim 1 , the amount of osmium comprises an amount of Os-191 claim 1 , and the at least one additional metal is chosen from Ir-192 claim 1 , Ir-193 claim 1 , Ir-194 claim 1 , Pt-192 claim 1 , Pt-194 claim 1 , and combinations thereof.3. The method of claim 1 , wherein the oxidizing solution comprises an aqueous solution of an oxidizing agent chosen from NaClO claim 1 , LiClO claim 1 , KClO claim 1 , NaIO claim 1 , NaSO claim 1 , XeO claim 1 , NaClO claim 1 , NaClO claim 1 , NaClO claim 1 , NaOH in contact with Clgas claim 1 , other alkali salts of ClO claim 1 , ClO claim 1 , ClOand ClO claim 1 , and combinations thereof.4. The method of claim 3 , wherein the oxidizing solution is an aqueous solution of NaClO at a concentration of about 12% available chlorine.5. The method of claim 4 , wherein the mixture is contacted with the oxidizing solution in an impinger device.6. The method of claim 4 , wherein the mixture is contacted with the oxidizing solution at a temperature of about 40° C. until the mixture is dissolved ...

Process For Producing Silver Nanowires

Described are processes for the production of silver nanowires comprising forming a reaction mixture including a polyol, an organic chemical adsorbed to a silver surface, a chemical to form a halide and/or pseudohalide and a chemical which forms a redox pair. A silver salt is added to the reaction mixture and temperature is maintained to form the silver nanowires. 1. A process for the production of silver nanowires , the process comprising: a polyol,', 'an organic chemical adsorbed on to a silver surface,', {'sup': −', '−', '−', '−', '−', '−', '−, 'a chemical which forms one or more of a halide and a pseudohalide, wherein the chemical which forms a halide is a salt of one or more of the halides Cl, Br and I and wherein the chemical which forms a pseudohalide is a salt of one or more of the pseudohalides SCN, CN, OCN and CNO,'}, 'a chemical which forms a redox pair, the chemical selected from the group consisting of bromine, iodine, vanadium and mixtures thereof,, 'a) providing of a reaction mixture comprising'}b) adding a silver salt in an amount such that the concentration of silver in the reaction mixture is at least 0.5 wt. %, based on the total weight of the reaction mixture, the silver salt being added at a temperature of the reaction mixture of at least 100° C., andc) maintaining the temperature of the reaction mixture of at least 100° C. for the duration of the reaction.2. The process according to claim 1 , wherein the silver salt is added in an amount such that the concentration of silver in the reaction mixture is at least 1.0 wt. % claim 1 , based on the total weight of the reaction mixture.3. The process of claim 1 , wherein the reaction mixture comprises one or more of the chemical which forms the halide and the chemical which forms the pseudohalide in an amount such that the concentration of the halide and/or of the pseudohalide in the reaction mixture is in a range of from 5 ppm to 2 claim 1 ,000 ppm.4. The process of claim 1 , wherein the chemical ...

PROCESS FOR THE RECOVERY OF GOLD FROM AN ORE IN CHLORIDE MEDIUM WITH A NITROGEN SPECIES

A process and system for recovery of gold from an ore having the steps of i) providing the ore containing the gold to be recovered, ii) leaching the ore in an oxidative chloride medium, including a nitrogen species to produce a solution comprising gold; and iii) recovering the gold from the solution. The gold in a preferred embodiment is recovered from refractory and carbonaceous ores. 1. A cyanide-free process for recovery of gold from an ore comprising the steps of:i) providing the ore comprising the gold to be recovered;ii) leaching the ore in a chloride oxidative medium, comprising nitric acid to produce a chloride solution comprising gold; andiii) recovering the gold from the chloride solution,wherein recovering the gold from the chloride solution is made byiv) contacting the chloride solution comprising gold with a resin adsorbent to selectively adsorb the gold and produce a barren solution; and.v) stripping the gold from the loaded resin adsorbent by elution with diluted hydrochloric acid,wherein the barren solution is treated with a matrix solution to produce the chloride medium which is recycled to step ii), and hematite.2. The process according to claim 1 , wherein other precious metals may be recovered from the barren solution before the treatment with the matrix solution.3. The process according to claim 1 , wherein the nitric acid is regenerated in step ii) with oxygen.4. The process according to claim 1 , wherein arsenic species in the ore is converted to stable and environmentally benign scorodite.5. The process according to claim 1 , wherein the nitric acid is in a concentration of 1 to 50 g/L in the chloride oxidative medium.6. The process according to claim 1 , wherein the nitrogen species is continuously regenerated.7. The process according to claim 1 , wherein the leaching is made at a temperature of 80° C. to 160° C.8. The process according to claim 1 , wherein the ore is a refractory and/or carbonaceous ore.9. The process according to claim 1 , ...

CHLORIDE PROCESS FOR THE LEACHING OF GOLD

A process for the extraction of gold from a gold-bearing ore or concentrate, comprising the steps of leaching the gold-bearing ore or concentrate with a lixiviant of hydrochloric acid and magnesium chloride at atmospheric pressure at a temperature of at least 90° C. and an Eh of at least 900 mV. After a liquid/solids separation step, the solution obtained is subjected to an organic solvent extraction step using an oxime to obtain a solution of organic solvent containing gold, which is stripped with sodium thiosulphate to recover gold. The extraction may be operated to extract gold with or without iron. Materials used in the process may be recycled. The process avoids environmental and other hazards associated with the use of cyanide to extract gold. 1. A process for the extraction of gold from a gold-bearing ore or concentrate , comprising the steps of:a) leaching the gold-bearing ore or concentrate with a lixiviant of hydrochloric acid and magnesium chloride at atmospheric pressure at a temperature of at least 90° C. and an Eh of at least 900 mV; andb) subjecting the leach solution so obtained to a liquid/solids separation step.2. The process of in which liquid from step b) is subjected to steps for recovery of gold.3. The process of in which the liquid is subjected to organic solvent extraction followed by steps to recover gold from the resultant pregnant gold-bearing organic solvent extractant solution.4. The process of in which the temperature is in the range of 90-100° C. and the Eh is in the range of 1050-1150 mV.5. A process for the extraction of gold from a gold-bearing ore or concentrate claim 1 , comprising the steps of:a) leaching the gold-bearing ore or concentrate with a lixiviant of hydrochloric acid and magnesium chloride at atmospheric pressure at a temperature of at least 90° C. and an Eh of at least 900 mV;b) subjecting the solution obtained in step a) to a liquid/solids separation step;c) subjecting the liquid obtained in step b) to an organic ...

PROCESS FOR SEPARATING AT LEAST ONE PLATINOID ELEMENT FROM AN ACIDIC AQUEOUS SOLUTION COMPRISING, BESIDES THIS PLATINOID ELEMENT, ONE OR MORE OTHER CHEMICAL ELEMENTS

The invention relates to a process for recovering at least one platinoid element contained in an acidic aqueous solution comprising chemical elements other than said platinoid element, said process comprising the following steps: 1. Method for recovering at least one platinoid element contained in an acidic aqueous solution comprising chemical elements other than said platinoid element , said process comprising the following steps:a step of bringing said acidic aqueous solution into contact with a reducing amount of a reducing agent which is a non-sulphurous and non-glucidic alcoholic compound chosen from cyclic, optionally aromatic, alcohols and aliphatic polyols, by means of which said platinoid element is reduced to its 0 oxidation state;a step of separating said thus reduced platinoid element from said acidic aqueous solution.2. Process according to claim 1 , wherein cyclic claim 1 , optionally aromatic claim 1 , alcohols are cyclic claim 1 , optionally aromatic claim 1 , hydrocarbon compounds comprising at least one ring directly bearing at least one hydroxyl group.3. Process according to claim 2 , wherein the cyclic claim 2 , optionally aromatic claim 2 , hydrocarbon compounds comprising at least one ring directly bearing at least one hydroxyl group claim 2 , are alicyclic and monocyclic compounds comprising from 4 to 10 carbon atoms claim 2 , bearing at least one hydroxyl group.4. Process according to claim 3 , wherein the alicyclic and monocyclic compound is cyclohexanol.5. Process according to claim 1 , wherein the cyclic claim 1 , optionally aromatic claim 1 , alcohols are cyclic claim 1 , optionally aromatic claim 1 , hydrocarbon compounds claim 1 , the ring of which bears at least one claim 1 , linear or branched claim 1 , saturated or unsaturated hydrocarbon group claim 1 , bearing at least one hydroxyl group.6. Process according to claim 5 , wherein said compounds are monocyclic aromatic compounds claim 5 , the ring of which bears at least one claim 5 ...

METHOD FOR COLLECTION OF RUTHENIUM OR RUTHENIUM COMPOUND

According to the present invention, ruthenium or a ruthenium compound, which is expensive, can be collected with high efficiency even from an aqueous solution containing a water-soluble salt, a lower alcohol, an organic acid or the like, by adding at least one specific inorganic adsorbent to an aqueous solution containing ruthenium or the ruthenium compound, dissolving the entirety or a part of the inorganic adsorbent under an acidic condition, and then adding an alkali to adjust the solution to be an alkaline solution having a pH value of 7 or higher, thereby depositing the inorganic adsorbent while causing the inorganic adsorbent to adsorb ruthenium or the ruthenium compound. 1. A method for collection of ruthenium or a ruthenium compound , comprising the steps of:putting an aqueous solution containing ruthenium or a ruthenium compound into contact with an inorganic adsorbent;dissolving the entirety or a part of the inorganic adsorbent under an acidic condition; andadding an alkali to deposit the dissolved inorganic adsorbent while causing the inorganic adsorbent to adsorb ruthenium or the ruthenium compound.2. The method for collection according to claim 1 , wherein the inorganic adsorbent is at least one selected from the group consisting of a calcium phosphate compound claim 1 , a talcite compound claim 1 , and an amorphous aluminumsilicate.3. The method for collection according to claim 1 , wherein the inorganic adsorbent is used in an amount which is claim 1 , by mass claim 1 , 0.1 to 100 times the amount of ruthenium or the ruthenium compound contained in the aqueous solution.4. The method for collection according to claim 1 , wherein the aqueous solution containing ruthenium or the ruthenium compound contains a water-soluble salt claim 1 , a lower alcohol or an organic acid.5. The method for collection according to claim 1 , further comprising the step of performing claim 1 , in advance claim 1 , oxidation by an oxidizer and reduction by an alkali on the ...

PRECIOUS METALS RECOVERY

Discloses a hydrometallurgical process and system for the recovery of precious metals; specifically palladium, rhodium, and platinum metals, at high purity and with limited waste and environmental fouling. 1. A method comprising:receiving a metals-containing stream containing at least one of silver, gold, copper, lead, cobalt, aluminum, calcium, sodium, bismuth, zinc, iron, nickel, ruthenium, sulfur, selenium, tellurium, and arsenic and at least one of rhodium, platinum, and palladium; and a first fraction comprising the at least one of silver, gold, copper, iron, lead, cobalt, aluminum, calcium, sodium, bismuth, zinc, iron, nickel, ruthenium, sulfur, selenium, tellurium, and arsenic; and', 'a second fraction comprising the at least one of rhodium, platinum, and palladium and being substantially free of silver, gold, copper, iron, lead, cobalt, aluminum, calcium, sodium, bismuth, zinc, iron, nickel, ruthenium, sulfur, selenium, tellurium, and arsenic., 'separating at least a portion of the metals-containing stream into2. The method of claim 1 , further comprising:recovering at least one of silver, gold, copper, iron, lead, cobalt, aluminum, calcium, sodium, bismuth, zinc, iron, nickel, ruthenium, sulfur, selenium, tellurium, and arsenic from the first fraction.3. The method of claim 1 , further comprising:baking at least a portion of the metals-containing stream to produce a baked stream;removing hydrochloric acid from the baked stream;adding water to the baked stream to provide a hydrated metals-containing stream; and,ramping the temperature of the hydrated metals-containing stream to a temperature between about 80° C. and about 31° C.4. The method of claim 1 , further comprising:baking at least a portion of the metals-containing stream to apparent dryness for a time less than about 50 hours.5. The method of claim 1 , further comprising:baking at least a portion of the metals-containing stream at a pressure between about 1 psia to about 15 psia.6. The method of ...

Co-Current and Counter Current Resin-In-Leach in Gold Leaching Processes

A method and system are provided in which a gold and/or silver-collecting resin-in-leach circuit comprises both co-current and counter-current sections. 128-. (canceled)29. A system , comprising:a first set of tanks configured to flow co-currently an ion exchange resin, thiosulfate, and a gold and/or silver-containing material, the first set of tanks comprising a first input for a first inputted ion exchange resin and a first output for a first gold and/or silver-loaded resin; anda second set of tanks configured to receive the thiosulfate and gold and/or silver-containing material from the first set of tanks and to flow counter-currently a second inputted ion exchange resin on the one hand and the thiosulfate and gold and/or silver-containing material on the other, the second set of tanks comprising a second input for the second inputted ion exchange resin and a second output for a second gold and/or silver-loaded resin.30. The system of claim 29 , wherein the first and second inputted ion exchange resins are different from one another claim 29 , and the first and second gold and/or silver-loaded resins are different from one another.31. The system of claim 29 , wherein at least a part of the second gold and/or silver-loaded resin is introduced into the input as part of the first inputted ion exchange resin claim 29 , and wherein the first and second inputs are different claim 29 , and the first and second outputs are different.32. The system of claim 29 , wherein the first and second sets of tanks do not share a common resin-in-leach or resin-in-pulp tank and wherein the gold and/or silver-containing material flows first through the first set of tanks and then through the second set of tanks.33. The system of claim 32 , wherein at least most of the gold and/or silver-loaded resin in the first set of tanks is removed from the first set of tanks and at least most of the gold and/or silver-loaded resin in the second set of tanks is removed from the second set of tanks ...

Process of Gold and Copper Recovery From Mixed Oxide - Sulfide Copper Ores

The present invention relates to a process of gold and copper recovery from gold-containing copper ores obtained from mixed oxide-sulfide copper ore bodies by a series of flotation stages. More specifically, the present invention relates to a process of gold and copper recovery whereby gold-containing ores obtained from mixed oxide-sulfide copper ore bodies, and/or copper flotation by-products thereof, are subjected to at least one flotation step following a dewatering step. In particular, it recovers copper and gold from the oxidized zone of porphyry and other mixed ore deposits. Likewise, the present process allows recovery of copper and gold from the tailings and scavenger concentrates which, in conventional process are no longer viable for further treatment. 1) A process for gold and copper recovery from mixed oxide-sulfide copper ores comprising the steps of:crushing, screening and grinding the ores to appropriate size;subjecting the ground ores to copper flotation, using xanthate as collector, and a suitable frother at a pH range of about 7 to about 8 to obtain a rougher concentrate, a scavenger concentrate and a copper by product,said rougher concentrate undergoes further grinding and flotation to obtain final copper concentrate and cleaner tails;said scavenger concentrate undergoes further grinding before recycling to copper flotation stage; and{'sub': 2', '4, 'said copper by-products undergo further processing by dewatering, then flotation at a pH range of about 5 to about 7 using a fatty acid-xanthate reagent combination as collector or promoter of the gold and a suitable frother to obtain rougher concentrate, scavenger concentrate and scavenger tails, subjecting said rougher concentrate to regrinding and cleaner flotation to separate the gold concentrate from the tailings, leaching the copper-gold concentrate with HSOat a pH of about 1 to about 2 until leaching is completed within 2 to 5 hours followed by liquid-solid separation of the acid leach liquor ...

METHOD FOR THIOSULFATE LEACHING OF PRECIOUS METAL-CONTAINING MATERIALS

Processes are provided for recovering precious metals from refractory materials using thiosulfate lixiviants. The processes can employ lixiviants that include at most only small amounts of copper and/or ammonia and operate at a relatively low pH, reduction of polythionates, inert atmospheres to control polythionate production, and electrolytic solutions which provide relatively high rates of precious metal recovery. 1106-. (canceled)107. A method , comprising:(a) contacting a precious metal-containing material with a thiosulfate lixiviant to dissolve the precious metal and form a pregnant thiosulfate leach solution containing the dissolved precious metal and a polythionate;(b) contacting the pregnant thiosulfate leach solution with at least one of a sulfite-containing reagent and a sulfide-containing reagent to convert at least most of the polythionates into thiosulfate;(c) thereafter contacting the pregnant leach solution with an extraction agent to collect at least most of the dissolved precious metal on the extraction agent and form a barren thiosulfate leach solution for recycle to step (a); and(d) recovering the collected precious metal from the precious metal loaded extraction agent.108. The method of claim 107 , further comprising claim 107 , after step (b) and before step (c):conditioning the pregnant leach solution in an oxidizing atmosphere to redissolve any precipitated precious metal sulfides.109. The method of claim 107 , wherein polythionates compete with dissolved precious metal complexes for loading on the extraction agent.110. The method of claim 108 , wherein the at least one of a sulfite-containing reductant and sulfide-containing reductant is the sulfite-containing reductant and wherein the sulfite-containing reductant is at least one of a metabisulfite and sulfur dioxide.111. The method of claim 108 , wherein the at least one of a sulfite-containing reductant and sulfide-containing reductant is the sulfide-containing reductant and wherein the ...

NANO WIRE AND METHOD FOR MANUFACTURING THE SAME

A method for manufacturing a nanowire is provided. A solvent is heated. A catalyst is added to the solvent. A metal compound is added to the solvent to form a metal nanowire. The metal nanowire is refined. In the refining of the metal nanowire, the catalyst and a refinement material to converting an insoluble material generated by the catalyst into a soluble material may be added to the solvent. The catalyst may include NaCl and at least one selected from the group consisting of Mg, K, Zn, Fe, se, Mn, P, Br and I. 1. A method for manufacturing a nanowire , the method comprising:heating a solvent;adding a catalyst to the solvent;adding a metal compound to the solvent to form a metal nanowire; andrefining the metal nanowire,wherein in the refining of the metal nanowire, the catalyst and a refining material to convert an insoluble material generated by the catalyst into a soluble material is added to the solvent.2. The method of claim 1 , wherein the refining material comprises at least one selected from the group consisting of KCN claim 1 , NaCN claim 1 , HNO claim 1 , and NHOH.3. The method of claim 1 , wherein the catalyst comprises at least one selected from the group consisting of AgCl claim 1 , KBr claim 1 , KI claim 1 , CuCl claim 1 , PtCl claim 1 , HPtCl claim 1 , HPtCl claim 1 , AuCl claim 1 , AuCl claim 1 , HAuCland HAuCl.4. The method of claim 1 , wherein the refining material is added to the solvent in a state that the refining material is dissolved in distilled water.5. The method of claim 1 , wherein the refining material is contained by 1.5 equivalents by weight to 3 equivalents by weight with respect to number of moles of the catalyst.6. The method of claim 1 , wherein the metal nanowire comprises silver (Ag).7. The method of claim 1 , after the heating of the solvent claim 1 , further comprising adding a capping agent to the solvent claim 1 , and after the adding of the metal compound to the solvent claim 1 , further comprising additionally adding a ...

METAL RECOVERY AGENT, METAL COMPOUND RECOVERY AGENT, AND METHOD FOR RECOVERING METAL OR METAL COMPOUND

The present invention relates to a metal recovery agent or a metal compound recovery agent including: a dried matter of a cell or a cell derivative of the red algae belonging to the order Cyanidiales, or an artificial matter that imitates the dried matter. The present invention also relates to a method for recovering a metal or a metal compound including: an addition step of adding a dried matter of a cell or a cell derivative of the red algae belonging to the order Cyanidiales, or an artificial matter that imitates the dried matter to a metal solution; and an adsorption step of causing a metal or a metal compound contained in the metal solution to be adsorbed onto the cell or the cell derivative derived from the dried matter, or the artificial matter. 1. A metal recovery agent or a metal compound recovery agent comprising:a dried matter of a cell of red algae belonging to the order Cyanidiales;a dried matter of a cell derivative of red algae belonging to the order Cyanidiales; oran artificial matter that imitates the dried matter of the cell or the dried matter of the cell derivative.2. A method for recovering a metal or a metal compound , comprising:an addition step of adding a dried matter of a cell of the red algae belonging to the order Cyanidiales, a dried matter of a cell derivative of the red algae belonging to the order Cyanidiales, or an artificial matter that imitates the dried matter of the cells or the dried matter of the cell derivative to a metal solution; andan adsorption step of causing a metal or a metal compound contained in the metal solution to be adsorbed onto the cell derived from the dried matter, the cell derivative derived from the dried matter, or the artificial matter.3. The method for recovering a metal or a metal compound according to claim 2 ,wherein an amount of the dried matter or the artificial matter added in the addition step is 0.001 mg or more with respect to 100 ml of the metal solution.4. The method for recovering a metal or a ...

Method for platinum group metals recovery from spent catalysts

A method for recovery of platinum group metals from a spent catalyst is described. The method includes crushing the spent catalyst to obtain a catalyst particulate material including particles having a predetermined grain size. The method includes subjecting the catalyst particulate material to a chlorinating treatment in the reaction zone at a predetermined temperature for a predetermined time period by putting the catalyst particulate material in contact with the chlorine containing gas. The method also includes applying an electromagnetic field to the chlorine-containing gas in the reaction zone to provide ionization of chlorine; thereby to cause a chemical reaction between platinum group metals and chlorine ions and provide a volatile platinum group metal-containing chloride product in the reaction zone. Following this, the volatile platinum group metal-containing chloride product is cooled to convert the product into solid phase platinum group metal-containing materials.

Substances Containing AuCs and Preparation Method and Use Thereof

Disclosed are a pharmaceutical use of a gold cluster and a substance containing the gold cluster and the preparation method and use thereof. The gold cluster and substance containing the gold cluster can inhibit the aggregation of Aβ and α-syn, has excellent effects on the levels of cell models and animal models, and can be used to prepare drugs for preventing and treating Alzheimer's disease and/or Parkinson's disease. 1. A substance containing gold clusters (AuCs) , said substance comprising:AuCs; anda ligand Y coating the AuCs externally.2. The substance according to claim 1 , wherein the AuCs has a gold core diameter smaller than 3 nm.3. The substance according to claim 1 , wherein the ligand Y is one selected from the group consisting of L(D)-cysteine and its derivatives claim 1 , cysteine-containing oligopeptides and their derivatives claim 1 , and other thiol-containing compounds.4. The substance according to claim 3 , wherein the L(D)-cysteine and its derivatives are L(D)-cysteine claim 3 , N-isobutyryl-L(D)-cysteine (L(D)-NIBC) claim 3 , or N-acetyl-L(D)-cysteine (L(D)-NAC).5. The substance according to claim 3 , wherein the cysteine-containing oligopeptides and their derivatives are cysteine-containing dipeptides claim 3 , cysteine-containing tripeptides or cysteine-containing tetrapeptides.6. The substance according to claim 5 , wherein the cysteine-containing dipeptides are L cysteine-L-arginine dipeptide (CR) claim 5 , L-arginine-L-cysteine dipeptide (RC) claim 5 , L-histidine-L-cysteine dipeptide (HC) claim 5 , or L-cysteine-L-histidine dipeptide (CH).7. The substance according to claim 5 , wherein the cysteine-containing tripeptides are glycine-L-cysteine-L-arginine tripeptide (GCR) claim 5 , L-proline-L-cysteine-L-arginine tripeptide (PCR) claim 5 , L-lysine-L-cysteine-L-proline tripeptide (KCP) claim 5 , or L-glutathione (GSH).8. The substance according to claim 5 , wherein the cysteine-containing tetrapeptides are glycine-L-serine-L-cysteine-L- ...

METHOD FOR PRODUCING ELEMENTAL RHODIUM

Method for producing elemental rhodium, comprising the steps of: 1. Method for producing elemental rhodium , comprising the steps of:(1) providing an aqueous suspension of diethylene triammonium hexahalogenorhodate adjusted with hydrohalic acid to a pH value of −1 to +2;(2) adding a sufficient quantity of reducing agent for complete conversion of the diethylene triammonium hexahalogenorhodate to the suspension provided in step (1) and allowing the reaction to proceed until the formation of elemental rhodium is completed; and(3) separating the elemental rhodium formed in step (2) from the hydrohalic aqueous composition formed in step (2);whereby halogen is bromine and/or chlorine.2. Method according to claim 1 ,whereby the pH value of the aqueous suspension provided in step (1) is in the range of −0.5 to +0.5.3. Method according to claim 1 ,whereby the diethylene triammonium hexahalogenorhodate originates from the rhodium separation step of precious metals refining.4. Method according to claim 1 ,whereby the diethylene triammonium hexahalogenorhodate is suspended in water and hydrohalic acid is added until the pH value of the aqueous suspension is adjusted to within the range of −1 to +2 or the diethylene triammonium hexahalogenorhodate is added to and suspended in a hydrohalic acid having a pH in the range of −1 to +2.5. Method according to claim 1 ,whereby the fraction of the diethylene triammonium hexahalogenorhodate in the aqueous suspension provided in step (1) is in the range of 5 to 40% by weight.6. Method according to claim 1 ,whereby the aqueous suspension is being agitated during step (2).7. Method according to claim 1 ,whereby one reducing agent or a combination of reducing agents is used and the reducing agents, in the case of a combination of reducing agents, are one after the other, at the same time or overlapping in time.8. Method according to claim 1 ,Whereby the reducing agent(s) is/are selected from the group consisting of hydrazine, hydrazine ...

Method for Extracting Gold and/or Silver and/or at Least One Platinum Metal

A process for the winning of at least one of gold, silver, and at least one platinum metal includes introducing at least one starting material containing at least one of gold, silver, and at least one platinum metal into an aqueous solution containing at least one nitrile, and producing hydroxyl radicals in the aqueous solution. 1. A process for the winning of at least one of gold , silver , and at least one platinum metal , comprising:introducing at least one starting material containing at least one of gold, silver, and at least one platinum metal into an aqueous solution containing at least one nitrile; andproducing hydroxyl radicals in the aqueous solution.2. The process as claimed in claim 1 , wherein producing the hydroxyl radicals comprises:introducing ozone into the solution to produce the hydroxyl radicals.3. The process as claimed in claim 2 , wherein the aqueous solution contains from 0.1 mol/l to 1.0 mol/l of at least one alkali metal hydroxide.4. The process as claimed in claim 2 , wherein the ozone is introduced into the solution through a porous diffuser below the at least one starting material.5. The process as claimed in claim 2 , further comprising:{'b': '20', '#text': 'flowing the aqueous solution () flows and the ozone in the same direction over the starting material.'}6. The process as claimed in claim 1 , wherein producing the hydroxyl radicals comprises:producing the hydroxyl radicals by a Fenton reaction in the aqueous solution.7. The process as claimed in claim 6 , wherein the aqueous solution contains formic acid.8. The process as claimed in claim 1 , wherein the aqueous solution contains at least 0.1 mol/l of the at least one nitrile.9. The process as claimed in claim 1 , wherein the aqueous solution contains at least one substance selected from the group consisting of alcohols claim 1 , surfactants and activated carbon.10. The process as claimed in claim 1 , wherein the aqueous solution is irradiated with UV light. The present invention ...

STRIPPING AGENT AND METHOD OF USE

A method of removing mercury adsorbed onto activated carbon is provided. The method includes treating an adsorbed mixture of metal cyanide complexes on a carbon substrate with an acidic solution of a stripping agent that is a weak acid. The method also eliminates inorganic scalants from the carbon substrate. In precious metal mining operations, the disclosed method reduces environmental emissions of mercury during the gold elution and carbon reactivation processes. 1. A method of removing mercury from an adsorbed mixture comprising mercury and gold that is adsorbed on a carbon substrate , the method comprising:desorbing mercury from the carbon substrate by contacting the adsorbed mixture with an acidic aqueous solution comprising a stripping agent that is a weak acid.2. The method of claim 1 , wherein prior to desorbing mercury from the carbon substrate claim 1 , the method further comprises:adsorbing mercury and gold on the carbon substrate to form the adsorbed mixture, which includes mercury and gold.3. The method of claim 1 , wherein the weak acid comprises phosphoric acid.4. The method of claim 1 , wherein the weak acid comprises an organic acid.5. The method of claim 1 , wherein the weak acid comprises a carboxylic acid.6. The method of claim 5 , wherein the carboxylic acid is a mono acid.7. The method of claim 6 , wherein the mono acid is selected from the group consisting of formic acid claim 6 , acetic acid claim 6 , and propionic acid.8. The method of claim 1 , wherein the acidic solution further comprises an alcohol.9. The method of claim 1 , wherein desorbing mercury from the carbon substrate comprises contacting the adsorbed mixture with the acidic aqueous solution at a temperature from about 40° C. to about 120° C.10. The method of claim 1 , wherein desorbing mercury from the carbon substrate comprises contacting the adsorbed mixture with the acidic aqueous solution at a temperature from about 60° C. to about 100° C.11. The method of claim 1 , wherein ...

RECOVERY OF GOLD FROM SOLUTION

A method is disclosed for recovering gold from a gold-containing organic solution containing soluble gold. The method comprises contacting the gold-containing organic solution with an aqueous stripping solution in order to extract gold from the gold-containing organic solution into the aqueous stripping solution. The aqueous stripping solution containing gold is separated from the organic solution. The separated aqueous stripping solution containing gold is contacted with a reducing agent containing sodium metabisulphite, in order to reduce gold from the aqueous stripping solution. 1. A method for recovering gold from a gold-containing organic solution containing soluble gold , wherein the method comprisescontacting a pregnant leach solution containing gold with a gold extraction reagent containing organic diester and organic alcohol, in order to obtain the gold-containing organic solution;contacting the gold-containing organic solution with an aqueous stripping solution in order to extract gold from the gold-containing organic solution into the aqueous stripping solution;separating the aqueous stripping solution containing gold from the organic solution;contacting the separated aqueous stripping solution containing gold with a reducing agent containing sodium metabisulphite, in order to reduce gold from the aqueous stripping solution;wherein the aqueous stripping solution contains sodium chloride, and wherein the aqueous stripping solution is weakly acidic.2. A method according to claim 1 , wherein the method comprises recovering reduced solid gold from the aqueous stripping solution by filtering the aqueous stripping solution.3. (canceled)4. (canceled)5. A method as claimed in claim 1 , wherein the method comprises reducing gold from the aqueous stripping solution containing gold without scrubbing the gold-containing organic solution.6. A method as claimed in claim 1 , wherein the method comprises stripping the gold-containing organic solution without scrubbing ...

METHOD AND SYSTEM FOR RECOVERY OF PRECIOUS METAL

A method and to an arrangement for recovery of precious metal. The method includes calculating a first electrical property of a slurry downstream of a retention screen in a first flow direction A either (i) based on a first difference between the first supplied current and the first received voltage, or (ii) based on a first difference between the first supplied voltage and the first received current, calculating a second electrical property of the slurry upstream of the retention screen either (i) based on a second difference between the second supplied current and the second received voltage, or (ii) based on a second difference between the second supplied voltage and the second received current, and calculating the adsorption particle content of the slurry upstream of the retention screen based on a difference between the first and the second electrical property. 142.-. (canceled)43. A method for recovery of precious metal , wherein the method comprising:arranging a plurality of adsorption vessels in series, wherein each adsorption vessel comprises a reactor space, a closed retention space within the reactor space, a retention screen between the reactor space and the closed retention space, first inlet means for feeding slurry containing precious metal into the reactor space, second inlet means for feeding adsorption particles into the reactor space, first outlet means for feeding slurry containing precious metal from the closed retention space, and second outlet means for feeding adsorption particles from the reactor space,feeding slurry containing precious metal into the reactor space of each adsorption vessel,feeding adsorption particles into the reactor space of each adsorption vessel, wherein precious metals are adsorbed onto the adsorption particles,moving the slurry through the plurality of adsorption vessels with a first drive system in a first flow direction A so that the slurry moves through the retention screen in the reactor space of at least one ...

METHOD FOR RECOVERING METAL POWDER FROM PLATINUM PASTE AND METHOD FOR REGENERATING PLATINUM PASTE

The present invention relates to a technique for recovering and recycling a platinum paste. The present invention provides a method for recovering a metal powder from a platinum paste formed by mixing a solid component composed of a metal powder including at least a platinum powder or a platinum alloy powder and an organic component including at least an organic solvent, the method including removing the organic component by heating the platinum paste at a recovery temperature set in a temperature range of 300° C. or higher and 500° C. or lower. The recovered metal powder can be recycled into a platinum paste equivalent to a new product by mixing the metal powder with a solvent etc. 18-. (canceled)9. A method for recovering a metal powder from a platinum paste formed by mixing a solid component composed of a metal powder including at least a platinum powder or a platinum alloy powder and an organic component including at least an organic solvent , comprising the steps ofheating the platinum paste at a recovery temperature set in a temperature range of 300° C. or higher and 500° C. or lower, thereby to remove the organic component and recover the metal powder.10. The method for recovering a metal powder from a platinum paste according to claim 9 , comprising the steps of treating a platinum paste corresponding to at least one of the following conditions:(a) a platinum paste viscosity has been changed by ±20% or more compared with the viscosity at the time of production of the platinum paste;(b) one or both of a platinum paste viscosity ratio of 0.4/s to 4/s (η0.4/η4) or a platinum paste viscosity ratio of 4/s to 20/s (η4/η20) as measured by Brookfield viscometer are changed by 10% or more with respect to the platinum paste viscosity ratio at the time of production; and(c) a solid component content has been changed by ±2% or more with respect to the solid component content at the production time.11. The method for recovering a metal powder from a platinum paste ...

METHOD FOR REDUCING FORMATION OF CaSO4 AND Fe2O3 CONTAINING DEPOSITS IN A PRESSURE OXIDATION AUTOCLAVE AND/OR ADJACENT CIRCUITS DURING PRESSURE OXIDATION OF GOLD-CONTAINING ORE

Formation of CaSOand FeOcontaining deposits is reduced in a pressure oxidation autoclave and/or adjacent circuits during pressure oxidation of gold-containing ore. The gold-containing ore is combined with water to create an aqueous slurry that is heated and introduced into the autoclave. The method includes providing a scale inhibitor that is free of an organic polymer and includes an inorganic phosphate according to formula (I), (XPO), wherein X is Na, K, H, or combinations thereof, and m is at least about 6, an inorganic phosphate according to formula (II), YPO, wherein Y is Na, K, H, an organic phosphonate; or combinations thereof, and n is at least about 6. The method includes the step of combining the scale inhibitor and at least one of the gold-containing ore, the water, and the aqueous slurry to reduce scale. 1. A method for reducing formation of CaSOand FeOcontaining deposits in a pressure oxidation autoclave and/or adjacent circuits during pressure oxidation of gold-containing ore , wherein the gold-containing ore is combined with water to create an aqueous slurry that is heated and introduced into the pressure oxidation autoclave , said method comprising: {'br': None, 'sub': 3', 'm, '(XPO)\u2003\u2003(I)'}, 'an inorganic phosphate according to formula (I),'}, 'providing a scale inhibitor that is free of an organic polymer and comprises;'} {'br': None, 'sub': n+2', 'n', '3n+1, 'YPO\u2003\u2003(II)'}, 'an inorganic phosphate according to formula (II),'}, 'wherein X is Na, K, H, or combinations thereof, and m is at least about 6,'} an organic phosphonate (III); or', 'a combination thereof; and, 'wherein Y is Na, K, H, or combinations thereof, and n is at least about 6, or'}combining the scale inhibitor and at least one of the gold-containing ore, the water, and the aqueous slurry to reduce the formation of scale in the pressure oxidation autoclave and/or adjacent circuits.2. The method of claim 1 , wherein the inorganic phosphate of formula (I) comprises ...

PROCESS OF LEACHING PRECIOUS METALS

The invention relates to modifications of a non-ammoniacal thiosulfate process of leaching precious metals (e.g. gold or silver) from precious metal-containing ores. The process involves leaching the ore with an aqueous lixiviant containing a soluble thiosulfate other than ammonium thiosulfate, a copper compound and an organic compound that serves as a copper ligand (i.e. a ligand-forming compound). Four modifications of this process are effective for increasing the amount of precious metal that can be extracted, reducing the consumption of materials, or for improving the rate of extraction. These four process, which may be used singly or in any combination, include (a) additions of soluble lead (e.g. as lead nitrate), (b) additions of thiourea, (c) increases in dissolved oxygen, and (d) increases of temperature at ambient pressure. This avoids the use environmentally harmful chemicals and allows for extraction from a variety of ores, e.g., containing substantial amounts of sulfides and/or quartz. 1. A method of extracting one or more precious metals from a precious metal-containing material , comprising the steps of:leaching a precious metal-containing material with a substantially cyanide-free and ammonia-free aqueous lixiviant containing dissolved thiosulfate, copper, a lead compound and an organic compound that serves as a copper ligand, thereby to form a leachate; andextracting the precious metal from the leachate.2. The method of claim 1 , wherein the lead compound is present in the lixiviant in the form of a soluble lead salt.3. (canceled)4. The method of claim 1 , wherein the lead compound is present in the lixiviant at a concentration in a range of 0.01 to 10 mM at any point within the leaching step.5. (canceled)6. The method of claim 1 , wherein the lixiviant additionally contains thiourea.7. The method of claim 6 , wherein the thiourea is present in the lixiviant at a concentration of 5 to 300 mM at any point within the leaching step.8. (canceled)9. The ...

Interseparation of Metals

The invention relates to processes for separating metals, and in particular for separating precious metals such as platinum and palladium, by solvent extraction. The invention also provides novel solvent extraction mixtures useful in the processes of the invention. The inventors have found that by simultaneously employing different extraction mechanisms for the extraction of a plurality of different metals, a simple and convenient process for their separation can be achieved. In particular, the inventors have found that the use of different extraction mechanisms for simultaneously extracting metals from an aqueous acidic phase into an organic phase enables the extracted metals to be separated by selective stripping from the organic phase using simple and mild conditions. This process is particularly advantageous as it permits two or more metals to be separated following a single solvent extraction step, because of the ability to selectively strip the metals from the organic phase. 1. A method of separating labile metal species and non-labile metal species present in an aqueous acidic phase , comprising (i) an outer sphere extractant capable of extracting the non-labile metal species into the organic phase; and', '(ii) a coordinating extractant capable of coordinating with the labile metal atom of the labile metal species,, '(a) contacting the aqueous acidic phase with an organic phase comprisingwhereby the labile and non-labile metals are extracted into the organic phase, then contacting the organic phase with water or an acidic aqueous solution to provide a first aqueous solution comprising non-labile metal species, and', 'contacting the organic phase with an aqueous phase comprising a complexing reagent capable of complexing with the labile metal atom of the labile metal species to provide a second aqueous solution comprising labile metal species., '(b) selectively stripping the metals from the organic phase by'}2. A method according to claim 1 , wherein the non- ...

EXTRACTION OF SELECTED PLATINUM-GROUP METALS FROM SUPPORTED CATALYST

Disclosed herein is a method for extracting precious metals from supported catalysts. The precious metal in one embodiment is rhodium. The supported catalyst may be from equipment, such as a used catalytic converter. The method is carried out at low temperature, and does not require harsh conditions, such as the use of a strong acid. The method involves contacting the catalytic material with a polar molecule and a reactive gas. 1. A method of extracting a selected platinum group metal from a composite , the method comprising:immersing a composite comprising the selected platinum group metal in a liquid comprising a polar molecule; andwhile the composite is immersed, exposing the composite to a reactive gas to extract the selected platinum group metal therefrom.2. The method of claim 1 , wherein the composite is a supported catalyst comprising a particulate catalyst bonded to a support claim 1 , the particulate catalyst comprising the selected platinum group metal and the support comprising a support material.3. The method of claim 1 , wherein the selected platinum group metal comprises one of rhodium claim 1 , rhenium claim 1 , ruthenium claim 1 , palladium claim 1 , or platinum.4. The method of claim 1 , wherein the selected platinum group metal comprises rhodium.5. The method of claim 1 , wherein the polar molecule is an organic solvent.6. The method of claim 1 , wherein the reactive gas comprises one of carbon monoxide or nitric oxide.7. The method of claim 1 , wherein the exposure of the composite to the reactive gas occurs at a pressure between 1 bar and 25 bar.8. The method of claim 1 , wherein the exposure to the reactive gas occurs at a temperature below 80 degrees Celsius.9. The method of claim 1 , wherein the reactive gas is generated by reaction of a liquid precursor in contact with the composite.10. The method of claim 9 , wherein the liquid precursor comprises one of formic acid claim 9 , formaldehyde claim 9 , and chloroform.11. The method of claim 1 , ...

METHODS FOR SYNTHESIZING SILVER NANOPLATES AND NOBLE METAL COATED SILVER NANOPLATES AND THEIR USE IN TRANSPARENT FILMS FOR CONTROL OF LIGHT HUE

Desirable methods for larger scale silver nanoplate synthesis are described along with methods for applying a noble metal coating onto the silver nanoplates to form coated silver nanoplates with a desirable absorption spectrum. The silver nanoplates are suitable for use in coatings for altering the hue of a transparent film. The hue adjustment can be particularly desirable for transparent conductive films. 1. A method for synthesizing , silver nanoplates , the method comprising:gradually adding a second quantity of hydrogen peroxide to an aqueous solution of a blend of silver ions, a polycarboxylate anion, a polyfunctional hydroxide compound, a first quantity of hydrogen peroxide and a reducing agent under mixing conditions, wherein the aqueous solution has a silver ion, concentration from about 0.00025 M to about 0.1M and wherein a molar ratio of the total hydrogen peroxide to reducing agent is from about 10 about 120.2. The method of wherein the polycarboxylate anion is citrate claim 1 , succinate claim 1 , citramalate claim 1 , malonate claim 1 , tartrate claim 1 , isocitrate cis-aconate claim 1 , tricarballylate or a combination thereof3. The method of wherein the polyfunctional hydroxide compound is represented by the formula RC(OH) RRwhere Ris a moiety with a hydroxyl group claim 1 , ester groups claim 1 , ether groups claim 1 , aldehyde groups claim 1 , carboxylic acid group claim 1 , ketone groups claim 1 , heterocyclic groups claim 1 , amino groups claim 1 , amide groups or a plurality thereof claim 1 , and Rand Rare independently H or an alkyl moiety optionally with a hydroxyl group claim 1 , ester group claim 1 , ether group claim 1 , aldehyde group claim 1 , carboxylic acid group claim 1 , ketone group claim 1 , heterocyclic group claim 1 , amino group claim 1 , amide group or a plurality thereof claim 1 , in which the R claim 1 , Rand Rmoieties have a carbon atom bonded to the C(OH) group with the indicated functional group claim 1 , if present claim 1 ...

METHODS AND SYSTEMS OF METAL SORPTION USING INTERSTAGE SCREENING

Embodiments of the present invention include systems and methods that include a sorption vessel containing a pulp including an aqueous slurry and a sorbent, a screening system at least partially submerged within the pulp and including a housing and a vibratory screening machine including a compression assembly and a screen assembly. The aqueous slurry includes a metal that is adsorbed by the sorbent to form an oversized material in the pulp. The compression assembly compresses the screen assembly into a concave shape and the screen assembly is inclined such that the pulp if fed over a first inclined portion of the screen assembly and the oversized materials are conveyed over a second inclined portion of the screen assembly and removed from the system or conveyed back into the sorption vessel. The undersized material passes through the screen assembly into a portion of the housing separate from the pulp and is discharged to another sorption vessel. 1. A system , comprising:a sorption vessel containing a pulp including an aqueous slurry and a sorbent; anda screening system at least partially submerged within the pulp and including a housing and a vibratory screening machine including a compression assembly and a screen assembly,wherein the aqueous slurry includes a metal that is adsorbed by the sorbent to form an oversized material in the pulp,wherein the compression assembly compresses the screen assembly into a concave shape and the screen assembly is inclined such that the pulp if fed over a first inclined portion of the screen assembly and the oversized materials are conveyed over a second inclined portion of the screen assembly and removed from the system or conveyed back into the sorption vessel,wherein undersized material passes through the screen assembly into a portion of the housing separate from the pulp and is discharged to another sorption vessel.2. The system of claim 1 , wherein the aqueous slurry and sorbent are independently fed into the sorption ...

EXTRACTION OF GOLD FROM FINE CARBON RESIDUE

Recovering gold from gold-loaded fine carbon by application of thermo-kinetic chemical activation regime at a low temperature, while preventing vitrification of imputies found in the gold-loaded fine carbon. 1. A method for recovering gold from gold-loaded fine carbon , comprising:oxidizing the gold-loaded fine carbon, resulting in a non-carbonaceous gold-bearing residue M.2. The method for recovering gold from gold-loaded fine carbon as set froth in claim 1 , wherein:oxidizing the gold-loaded fine carbon includes:impregnating the gold-loaded fine carbon with oxygen; and {'br': None, 'sub': 2', '2, 'MC+O=>M+CO'}, 'gasifying of carbon particles of the oxygen impregnated gold-loaded fine carbon, which results in a non-carbonaceous gold-bearing residue M as followswhere C is carbon, O is oxygen; andrecovering gold from non-carbonaceous gold-bearing residue M.3. The method for recovering gold from gold-loaded fine carbon as set forth in claim 2 , wherein:the gold-loaded fine carbon is impregnated with oxygen using an aqueous reagent solution.4. The method for recovering gold from gold-loaded fine carbon as set forth in claim 3 , wherein:the aqueous reagent solution is comprised of:one or more oxidation facilitator compounds that facilitate oxidation process of the gold-loaded fine carbon, which are mixed with one or more sources of oxygen.5. The method for recovering gold from gold-loaded fine carbon as set forth in claim 4 , wherein:the one or more oxidation facilitator compounds is comprised of hydroxides of alkali metals.6. The method for recovering gold from gold-loaded fine carbon as set forth in claim 5 , wherein:the sources of oxygen are from oxygen reach dopants.7. The method for recovering gold from gold-loaded fine carbon as set forth in claim 6 , wherein:the oxygen reach dopants are selected from nitrates, persulfates, or permanganates.8. The method for recovering gold from gold-loaded fine carbon as set forth in claim 7 , wherein:the preparing of the aqueous ...

COMPOUNDS AND METHODS TO ISOLATE GOLD

Methods for recovering gold from gold-bearing materials are provided. The methods rely upon on the self-assembly of KAuBrand α-cyclodextrin (α-CD) in aqueous solution to form a co-precipitate, a 1:2 complex, KAuBr•(α-CD)(“α•Br”), either alone or in an extended {[K(OH)][AuBr]⊂(α-CD)}chain superstructure (FIG. ). The co-precipitation of α•Br is selective for gold, even in the presence of other metals, including other square-planar noble metals. The method enables one to isolate gold from gold-bearing materials from diverse sources, as further described. 1. A method for isolating gold from a gold-bearing material , comprising:adding HX and an acid to the gold-bearing material to form a first dissolved gold solution;adding a base to the first dissolved gold solution to form a second dissolved gold solution;adding a cyclodextrin to the second dissolved gold solution to form a precipitate in the second dissolved gold solution; andisolating the precipitate from the second dissolved gold solution,wherein HX comprises a hydrogen halide and the precipitate comprises a gold-cyclodextrin complex.2. The method of claim 1 , wherein X is selected from the group consisting of fluorine claim 1 , chlorine claim 1 , bromine and iodine.3. The method of claim 1 , wherein the acid is selected from the group consisting of HNO claim 1 , HCl claim 1 , HBr claim 1 , HI claim 1 , and HSO.4. The method of claim 1 , wherein the base is selected from the group consisting of LiOH claim 1 , NaOH claim 1 , KOH claim 1 , RbOH claim 1 , and CsOH.5. The method of claim 1 , wherein the first dissolved gold solution has a pH less than about pH 2.0.6. The method of claim 1 , wherein the second dissolved gold solution has a pH from about pH 2.0 to about pH 7.0.7. The method of claim 1 , wherein the cyclodextrin is selected from the group consisting of α-cyclodextrin claim 1 , β-cyclodextrin claim 1 , γ-cyclodextrin and mixtures thereof.8. The method of claim 1 , wherein the precipitate is KAuBr•(α-CD)(α• ...

Method for Improving Gold Recovery

Disclosed are methods and compositions for improving metal extraction processes by introducing at least one cationically charged compound selected from a group consisting of amines, particularly quaternary amines such as alkyldimethylbenzylammonium chlorides (ADBAC compounds), polyamines and other suitable cationic organic materials, and mixtures thereof, for neutralizing and/or coagulating excess anionic organic compounds including, for example, flotation reagents, surfactants, polymers, flotation reagent by-products and/or anti-scalant additives found in metal concentrate streams, and thereby reduce the downstream fouling of the activated carbon by these compounds. 1. A method for recovering a metal in a leaching process comprising:obtaining a metal concentrate stream, the metal concentrate stream containing a concentration of a free anionic organic compound;combining a quantity of a cationic amine compound with the metal concentrate stream to form an adjusted metal concentrate stream, the quantity of the cationic amine compound being sufficient to neutralize at least a majority of the free anionic organic compound;mixing the adjusted metal concentrate stream with activated carbon under conditions whereby the metal is selectively adsorbed on the activated carbon.2. The method for recovering a metal in a leaching process according to claim 1 , further comprising:determining a free anionic organic content of the metal concentrate stream; andadjusting the quantity of the cationic amine compound in response to the free anionic organic content.3. The method for recovering a metal in a leaching process according to claim 1 , wherein:the quantity of the cationic amine compound is sufficient to establish an excess concentration of the cationic amine compound.4. The method for recovering a metal in a leaching process according to claim 3 , further comprising:determining the excess cationic compound content of the adjusted metal concentrate stream; andadjusting the quantity ...

PRECIOUS METALS RECOVERY

Discloses a hydrometallurgical process and system for the recovery of precious metals; specifically palladium, rhodium, and platinum metals, at high purity and with limited waste and environmental fouling. 1. A method for recovering at least one precious metal from a precious metal containing stream , the method comprising:removing at least a portion of a contaminant, wherein the contaminant comprises lead, nickel and combinations thereof, from a basic metal concentrate stream to form a resulting stream;removing at least a portion of a second contaminant from the resulting stream, wherein the second contaminant is selected from the group consisting of selenium, sulfur, arsenic and combinations thereof, to form a partially purified stream;subjecting the partially purified stream to a leach to produce a leached stream;removing at least one basic metal from the leached stream, wherein the at least one basic metal is selected from the group consisting of lead, silver, nickel, copper, iron, cobalt, bismuth, chromium, gold, ruthenium and combinations thereof, to form a precious metal containing stream; and,adding a substituted quaternary amine to the precious metal containing stream to recover at least one precious metal from the precious metal containing stream.2. The method of claim 1 , wherein the at least a portion of a contaminant is removed by adding a strong acid and a carboxylic acid to the basic metal concentrate stream.3. The method of claim 2 , wherein the strong acid is sulfuric acid and the carboxylic acid is formic acid.4. The method of claim 1 , wherein the second contaminant is removed by adding a basic and an oxygen containing gas to the resulting stream.5. The method of claim 4 , wherein the basic is sodium hydroxide and the oxygen containing gas is oxygen gas.6. The method of claim 1 , wherein the leach removes insoluble materials from the partially purified stream.7. The method of claim 1 , wherein the step of subjecting the partially purified stream ...

LEACHING AIDS AND METHODS OF USING LEACHING AIDS

Disclosed are leaching aids and methods of using the leaching aids. The leaching aids can include one or a combination of compounds. The methods of using the leaching aids can include a process of recovering metal from ore, for example, a process involving leaching, concentration and purification unit operations. 2. The solution of claim 1 , wherein each n is independently 2 to 20.3. The solution of claim 2 , wherein each n is independently 2 to 10.5. The solution of claim 1 , wherein the lixiviant comprises sodium cyanide claim 1 , a bromide ion claim 1 , a chlorine ion claim 1 , an iodide ion claim 1 , thiosulfate or thiocyanide.6. The solution of claim 1 , wherein the lixiviant is at a concentration of about 1 mg/L to about 10 g/L of the solution.7. The solution of claim 5 , wherein the lixiviant is at a concentration of 1 mg/L to about 10 g/L of the solution.8. The solution of claim 1 , wherein the lixiviant is at a concentration of about 1 mg/L to about 1 g/L of the solution.9. The solution of claim 7 , wherein the lixiviant is at a concentration of about 1 mg/L to about 1 g/L of the solution.10. The solution of claim 1 , wherein the one or more compound is at a total concentration of about 5 ppm to about 100 ppm.11. The solution of claim 4 , wherein the one or more compound is at a total concentration of about 5 ppm to about 100 ppm.12. The solution of claim 1 , wherein the one or more compound is at a total concentration of about 15 ppm to about 30 ppm.13. The solution of claim 4 , wherein the one or more compound is at a total concentration of about 15 ppm to about 30 ppm.14. The solution of claim 4 , wherein the one or more compound is at a total concentration of at least about 25 ppm.15. The solution of claim 1 , further comprising an additional metal.16. The solution of claim 15 , wherein the additional metal is selected from a group consisting of copper claim 15 , silver claim 15 , nickel claim 15 , zinc claim 15 , molybdenum claim 15 , vanadium claim 15 ...

SYNTHESIS OF GOLD NANOPARTICLES USING RED ALGAE EXTRACT

A method for preparing gold metal nanoparticles, e.g., nanospheres and nanoprisms, includes combining an extract of red algae with chloroauric acid (HAuCl). The red algae can be . The extract can include a water solvent extract. The chloroauric acid (HAuCl) can be in an aqueous solution. The method can include providing chloroauric acid 1. A method of synthesizing gold nanoparticles using red algae extract comprising:{'sub': '4', 'providing a solution of chloroauric acid (HAuCl);'}providing an aqueous solution of red algae extract, and{'sub': '4', 'combining the solution of chloroauric acid (HAuCl) and the red algae extract solution to produce gold nanoparticles.'}2. The method of synthesizing gold nanoparticles using red algae extract according to1. , wherein the red algae extract comprises an extract of Laurencia papillosa.3. The method of synthesizing gold nanoparticles using red algae extract according to claim 1 , wherein the solution of chloroauric acid (HAuCl) includes a chloroauric acid (HAuCl) concentration of about 0.25 mM to 5.0 mM.4. The method of synthesizing gold nanoparticles using red algae extract according to claim 1 , wherein the gold nanoparticles include gold nanospheres.5. The method of synthesizing gold nanoparticles using red algae extract according to claim 1 , wherein a concentration of the red algae extract is from about 0.01 to about 0.10 g/mol.6. The method of synthesizing gold nanoparticles using red algae extract according to claim 1 , wherein the gold nanoparticles have a mean diameter in the range of from about 1 to about 100 nm.7. The method of synthesizing gold nanoparticles using red algae extract according to claim 1 , wherein the gold nanoparticles have a mean diameter in the range of from about 1 to about 55 nm.8. The method of synthesizing gold nanoparticles using red algae extract according to claim 1 , wherein a shape of the nanoparticles is at least one of spherical claim 1 , spheroidal claim 1 , elongated spherical claim 1 ...

A PROCESS FOR RECOVERING GOLD FROM ORES

A process for recovering gold from a gold-containing raw material, comprising leaching the gold-containing material with an aqueous solution comprising elemental bromine and bromide source to form a pregnant leach solution with the gold dissolved therein; separating said pregnant leach solution from the gold-depleted raw material, removing elemental bromine from said pregnant leach solution, extracting the gold from the pregnant leach solution in an acidic environment into an organic extractant, to form a gold-loaded extract and bromide-containing raffmate, stripping the extract with an alkaline aqueous solution to form a gold-bearing aqueous solution, generating gold (Au) and treating bromide-containing stream(s) to produce recyclable elemental bromine. 1. A process for recovering gold from a gold-containing raw material , comprising leaching the gold-containing material with an aqueous solution comprising elemental bromine and bromide source to form a pregnant leach solution with the gold dissolved therein; separating said pregnant leach solution from the gold-depleted raw material , removing elemental bromine from said pregnant leach solution , extracting the gold from the pregnant leach solution in an acidic environment into an organic extractant , to form a gold-loaded extract and bromide-containing raffinate , stripping the extract with an alkaline aqueous solution to form a gold-bearing aqueous solution , generating gold (Auº) and treating bromide-containing stream (s) to produce recyclable elemental bromine.2. The process according to claim 1 , wherein the gold-containing raw material is an ore which generates a near-neutral or slightly alkaline pH when added to water claim 1 , such that the leaching takes place at a pH in the range from 6.0 to 8.0.3. The process according to claim 1 , wherein after the separation of the leach solution from the gold-depleted raw material claim 1 , the process further comprises a step of washing the solid gold-depleted raw ...

HYPERBRANCHED POLYMER, METAL RECOVERY AGENT, METAL RECOVERY METHOD, AND CATALYTIC ACTIVITY INHIBITOR

There is provided a hyper-branched polymer represented by the following formula (1) and having a weight-average molecular weight in a range of 1,000 to 1,000,000. In the formula (1), Ais a group containing an aromatic ring, Ais a group containing an amide group, Ais a group containing sulfur, Ris hydrogen or a substituted or unsubstituted hydrocarbon group having 1 to 10 carbon atoms, ml is in a range of 0.5 to 11, and n1 is in a range of 5 to 100. 4. The hyper-branched polymer according to claim 3 , wherein in the formula (3) claim 3 , Ris the single bond claim 3 , Ris the hydrogen claim 3 , and Ris an isopropyl group.6. The hyper-branched polymer according to claim 5 , wherein in the formula (4) claim 5 , Rand Rare each an ethyl group.7. The hyper-branched polymer according to claim 1 , wherein in the formula (1) claim 1 , a ratio of a total molar number of the amide group contained in Ato a molar number of Awhich is the group containing sulfur is in a range of not less than 0.5 to less than 1.5.8. The hyper-branched polymer according to claim 1 , wherein in the formula (1) claim 1 , Ais a dithiocarbamate group; and{'sup': 2', '3, 'a ratio of a total molar number of the amide group contained in Ato a molar number of Awhich is the group containing sulfur is in a range of 0.5 to 1.5.'}9. The hyper-branched polymer according to claim 1 , wherein in the formula (1) claim 1 , Ris a vinyl group.10. The hyper-branched polymer according to claim 1 , wherein the hyper-branched polymer is a mixture of a hyper-branched polymer in which the Rin the formula (1) is a vinyl group and a hyper-branched polymer in which the Rin the formula (1) is an ethyl group.11. A metal recovery agent recovering a metal in a liquid in which the metal is dissolved claim 1 , comprising the hyper-branched polymer as defined in .12. A metal-recovering method of recovering a metal in a liquid in which the metal is dissolved claim 1 , the method comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim ...

Method for recovering gold and gold recovery facility

Provided are a method for recovering gold, in which gold is recovered from a solution containing a gold cyano complex using a crosslinked resin containing a vinyl amine unit, by which gold can be efficiently recovered from the solution not only in a case (A) where a concentration of the gold cyano complex in the solution is low but also in a case (B) where another metal is dissolved in the solution; a method for recovering gold, in which the crosslinked resin and the solution are brought into contact with each other to separate the crosslinked resin and the solution from each other, by which gold can be efficiently recovered from the solution not only in the case (A) but also in the case (B); and a gold recovery facility comprising: a container inside which the crosslinked resin is accommodated in a flowable manner; and a device which feeds the solution to the container, by which gold can be efficiently recovered from the solution not only in the case (A) but also in the case (B).

ACTIVATED CARBON REGENERATION METHOD AND GOLD RECOVERY METHOD

An activated carbon regeneration method of the present invention is for eluting gold from activated carbon on which the gold has been adsorbed and thereafter recycling, in adsorption of the gold, the used activated carbon from which the gold has been eluted, the method including: washing the used activated carbon with an acidic washing liquid, alkaline washing liquid or neutral washing liquid; and when the used activated carbon is washed with the acidic washing liquid, keeping the acidic washing liquid after the washing in an acidic region, or when the used activated carbon is washed with the alkaline washing liquid or neutral washing liquid, keeping the alkaline washing liquid or neutral washing liquid after the washing in an alkaline region or neutral region. 110. -. (canceled)11. An activated carbon regeneration method for recycling used activated carbon in adsorption of gold , from which gold has been eluted , after eluting the gold from activated carbon on which the gold has been adsorbed , the method comprising:washing the used activated carbon with an acidic washing liquid or alkaline washing liquid; andwhen the used activated carbon is washed with the acidic washing liquid, keeping the acidic washing liquid after the washing in an acidic region and pH of the acidic washing liquid after the washing is defined as 2.7 or lower, or when the used activated carbon is washed with an alkaline washing liquid, keeping the alkaline washing liquid after the washing in an alkaline region and an aqueous caustic soda solution is used as the alkaline washing liquid.12. The activated carbon regeneration method according to claim 11 , wherein the used activated carbon is washed with the acidic washing liquid claim 11 , and a hydrochloric acid solution is used as the acidic washing liquid.13. The activated carbon regeneration method according to claim 11 , wherein the used activated carbon is washed with the alkaline washing liquid claim 11 , and pH of the alkaline washing ...

CYCLONE UNDERFLOW SCAVENGERING PROCESS USING ENHANCED MINERAL SEPARATION CIRCUITS (EMSC)

A system is provided for processing a circulating load in comminution circuit of a mineral separation process for separating mineral particles of interest from an ore, featuring: a coarse screen and an enhanced mineral separation circuit (EMSC). The coarse screen may be configured to receive a cyclone underflow having mineral particles of interest and forming part of the circulating load of the comminution circuit, and provide coarse screen feeds for further processing. The enhanced mineral separation circuit may include a collection processor configured to receive one of the coarse screen feeds, and may also include at least one collection apparatus located in the collection processor, the at least one collection apparatus having a collection surface configured with a functionalized polymer comprising a plurality of molecules having a functional group configured to attract the mineral particles of interest to the collection surface, and provide enhanced mineral separation circuit feeds for further processing in the system. 1. A system for processing a circulating load in comminution circuit of a mineral separation process for separating mineral particles of interest from an ore , comprising:a coarse screen configured to receive a cyclone underflow having mineral particles of interest and forming part of the circulating load of the comminution circuit, and provide coarse screen feeds for further processing; andan enhanced mineral separation circuit having a collection processor configured to receive one of the coarse screen feeds, and at least one collection apparatus located in the collection processor, the at least one collection apparatus having a collection surface configured with a functionalized polymer comprising a plurality of molecules having a functional group configured to attract the mineral particles of interest to the collection surface, and provide enhanced mineral separation circuit feeds for further processing in the system.2. A system according to ...

A method for recovering catalytic metals

A method for recovering catalytic metals from fluids containing catalytic metal colloids. Fluid compositions such as rinse solutions or dragout baths containing catalytic metal colloids are passed through a filter that entraps catalytic metal colloids on the filter. The catalytic metal colloids have a high affinity for the filter in contrast to other components of the fluids. The other components of the fluids pass through the filter while the catalytic colloids concentrate on the filter. The filter containing the catalytic metal colloids is burned, and the catalytic metal is retrieved. The method is economically efficient and environmentally friendly.

一种分质回收复杂重金属的耐酸螯合树脂组合调控方法

本发明公开了一种分质回收复杂重金属的耐酸螯合树脂组合调控方法，属于重金属废水资源化处理领域；将含多种重金属的强酸废水依次泵入装填有不同类型耐酸螯合树脂的吸附柱，通过梯级调控溶液pH值（pH≤3），实现其中铜、镍、钴、锌、铁等多种重金属离子的多级选择性分离，处理后出水主要含铁盐，可用于生产铁基絮凝剂或净水剂；采用稀酸再生耐酸螯合树脂获得高浓度再生液，可通过中和等技术实现高纯度回收；本发明通过梯级调控废水pH值以及优选组合耐酸螯合树脂，实现了强酸废水中复杂重金属的选择性分离和分质回收，具有显著的环境效益和经济效益。

Method of extracting non-ferrous and/or noble metals from aqueous solutions

Изобретение относитс  к способам выделени  цветных металлов из водных растворов, содержащих растворенные соединени  этих металлов. Цель изобретени  - упрощение процесса . Способ предусматривает извлечение цветных металлов из водных растворов. Раствор пропускают через колонну, содержащую слой активированного угл  с размерами зерен 0,0.1-8 мм и слой красного фосфора с размерами зерен 0,01-10 мм или смесь красного фосфора с. активированным углем при содержании его в смеси 15,7 - 98 мас,%. Активированный уголь располагают нижним слоем. Красный (.фосфор активируют гипохлоритом натри . 1 з.п. ф-лы. СО оо о со :о The invention relates to methods for separating non-ferrous metals from aqueous solutions containing dissolved compounds of these metals. The purpose of the invention is to simplify the process. The method involves the extraction of non-ferrous metals from aqueous solutions. The solution is passed through a column containing an activated carbon layer with a grain size of 0.0.1-8 mm and a layer of red phosphorus with a grain size of 0.01-10 mm or a mixture of red phosphorus c. activated carbon with a content of 15.7 - 98 wt.% in a mixture. Activated carbon have a lower layer. Red (. Phosphorus is activated by sodium hypochlorite. 1 Cp of f-ly. CO oo o co: o

使用含卤化铜有机溶剂体系的贵金属回收方法

本发明提供一种简便且经济的环保型的贵金属的回收方法，其用于从旧电子设备等中回收贵金属。一种贵金属的回收方法，其中，包括在含有卤化铜和非质子性的极性有机溶剂的溶剂体系中溶解贵金属的工序；和在溶解有所述贵金属的溶剂体系中添加还原剂，使该贵金属析出的工序。

一种从含钯、铑合金的合金片中高效分离提纯钯和铑的方法

本发明提供一种从含钯、铑合金的合金片中高效分离提纯钯和铑的方法，采用王水溶液溶解钯铑合金片，钯被王水溶解而铑因为耐王水腐蚀则不溶以细粉沉于容器底部，钯铑得到分离；进入溶液中的钯通过加入高锰酸钾和氯化铵得到红色钯沉淀物而被提纯，再通过加入化学试剂生成二氯二氨钯，以二氯二氨钯为原材合成硫酸四氨钯；铑不溶物与过氧化钠混合焙烧，酸浸溶解得到含铑液，提纯还原后得到99.95％铑粉。

一种基于硫代硫酸盐浸出法的二硫化钼回收贵金属工艺

本发明公开了一种基于硫代硫酸盐浸出法的二硫化钼回收贵金属工艺，包括以下步骤：选取含贵金属矿石，将其置于硫代硫酸盐溶液中磨矿，磨矿后的矿浆进行浸出；获取所得到的浸出液，将MoS 2 基材料置于浸出液中进行吸附贵金属的硫代硫酸络合物；将吸附后的溶液过滤脱水，得到载有贵金属单质的MoS 2 基材料；将贵金属单质从MoS 2 基材料上脱附，得到含有贵金属单质的贵液；将所得到的贵液进行固液分离，得到贵金属单质。本发明通过MoS 2 基材料能够一步完成硫代硫酸盐浸金/银液中的富集与还原，且吸附量可达每克吸附剂吸附数百毫克Au/Ag；同时，通过NaOH溶液或Na 2 S溶液实现吸附剂上金/银的脱附。该方法简化流程，操作简单，吸附剂简单易得，金/银吸附效果好，同时实现了金/银的高效脱附。

一种利用过硫酸盐-氨体系回收废旧陶瓷电容器中银的方法

本发明公开了一种利用过硫酸盐‑氨体系回收废旧陶瓷电容器中银的方法。本发明方法包括以下步骤：第一步，银的浸出：先将废旧陶瓷电容器球磨或者切碎成平均粒径小于0.2mm粒径的颗粒，再将上述颗粒加入到过硫酸盐‑氨‑碱溶液中混合反应，然后过滤，得到含银滤液；第二步，银的还原提取：用水合肼等还原剂直接还原提取银；第三步，银的提纯：将得到的粗品银用热的浓碱浸泡除去锌、铝、锡和铅，再用酸化过的氯化铁溶液浸泡除去锰、铁、铜和镍，最后经干燥即可得到银。本发明的方法能够对废旧电容器中的贵金属银进行高效回收，简单可行，节能环保。

一种从碱性反萃液中精炼钯的方法

本发明公开了一种从碱性反萃液中精炼钯的新方法，包括以下步骤：（1）浓缩调整碱性钯反萃液中钯的浓度；（2）采用络合、酸化进行初步除杂；（3）采用稀盐酸将粗二氯二氨合钯溶解；（4）采用传统的沉钯、水溶和络合、酸化法进行后续精炼，产出99.99%的海绵钯产品。与现有技术相比，本发明具有收率高、不产生含氨废气、二氯二氨合钯与氯亚钯酸铵转化简便、产品质量稳定、易于工业化等优点，钯收率可达99.3%以上。

Method of hydrometallurgical recovery of rare metals from technologically persistent raw material

FIELD: hydrometallurgy. SUBSTANCE: persistent raw material matrix is disintegrated and placed into sealed vessel containing solution of halide acids, nitrous acid, and complexing agents for rare metals. Into the vessel from outside, oxygen is supplied, and process is carried out at a specified pH value, pressure, and oxidants reduction half-wave potential for a period of time chosen from opening matrix conditions to provide maximum oxidation and recovery of metals from matrix and formation of mother solution containing dissolved rare metal complexes and oxides. Rare metals are isolated from matrix and mother solution by conventional techniques. EFFECT: enhanced process efficiency. 18 cl ЭбРУЕГсС ПЧ Го РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (19) (51) МПК ВИ” 2114 196. 13) СЛ С 22 В 3/04, 11/00 12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21), (22) Заявка: 95115834102, 19.09.1995 (46) Дата публикации: 27.06.1998 (56) Ссылки: Трэдвел Ф.П., Голд В.Т. Качественный анализ. - М., 1946. Кольт И.М., Сенд эл Е.Б. Количественный анализ. - М., 1948. Ц$, 4152412, С 01 В 15Ю1, 1988 . (71) Заявитель: Клиблей Генри Хадыевич (72) Изобретатель: Клиблей Г.Х., Левина Е.Д., Левина О.В., Фазылов А.Г. (73) Патентообладатель: Клиблей Генри Хадыевич (54) СПОСОБ ГИДРОМЕТАЛЛУРГИЧЕСКОГО ИЗВЛЕЧЕНИЯ РЕДКИХ МЕТАЛЛОВ ИЗ ТЕХНОЛОГИЧЕСКИ УПОРНОГО СЫРЬЯ (57) Реферат: Изобретение может быть использовано для гидрометаллургического извлечения редких металлов из технологически упорного сырья. Матрицу упорного сырья измельчают, помещают в герметичный сосуд, содержащий раствор галогенных кислот, азотистую кислоту и комплексообразователи для редких металлов. В сосуд извне подают кислород. Процесс ведут при определенной величине показателя рН кислотности реакционной смеси, давлении и потенциале полуволны восстановления окислителей достаточное время, которое выбирают из условия вскрытия матрицы сырья для максимального окисления и извлечения редких металлов из матрицы и образования ...

Recovering method of platinum from platinum scrap leaching solution using synthetic extraction resins

PURPOSE: A recovering method of platinum from platinum scrap leachate using synthetic extraction resins is provided to separate iron(Fe) and aluminum(Al) by using a first synthetic extraction resin synthesized by using D2EHPA (di-(2-ethylhexyl)phosphoric acid) and also to separate only platinum(Pt) from rhodium(Rh) by using a second synthetic extraction resin synthesized by using TBP(Thyroxine Binding Protein). CONSTITUTION: A recovering method of platinum from platinum scrap leachate using synthetic extraction resins comprises the following steps. A first synthetic extraction resin and a second synthetic extraction resin are produced by being synthesized by a suspension polymerization method. The first synthesis extraction resin is injected in the platinum scrap leachate. The Aluminum(Al) and iron(Fe) of platinum scrap leachate are absorbed in the first synthesis extraction resin by stirring and reacting the first synthesis extraction resin and platinum scrap leachate at the temperature of 35 to 55°C, and the first synthesis extraction resin, in which the Aluminum and iron are absorbed, is removed. The second synthesis extraction resin is added to the platinum scrap leachate in which the first synthesis extraction resin is removed, and the platinum of platinum scrap leachate is absorbed in the second synthesis extraction resin. The second synthesis extraction resin, in which the platinum is absorbed, is removed, and the platinum is recovered by detaching the platinum from the second synthesis extraction resin by using detaching solution.

一种湿法浸出铂氧化铝催化剂中金属铂的方法

本发明公开一种湿法浸出铂氧化铝催化剂中金属铂的方法，包括以下步骤：（1）将铂氧化铝催化剂装填入固定床反应器的反应管中，用氮气置换其中的空气；（2）通入还原气体，升温对所述铂氧化铝催化剂活化，自然冷却至室温；（3）从反应管底部通入水，将所述铂氧化铝催化剂润湿，微波加热升温至60‑90℃继续保持，同时保持催化剂固定不动，从反应管底部通入氯化氢气体和过碳酸钠溶液反应；（4）反应管中剩余的固体经过水洗和烘干后回收利用。本发明提供的方法，铂的回收率能达到98%以上，且浸出过程不对氧化铝载体造成破坏，载体能够重新作为生产催化剂的原料使用。

Apparatus for recovery of precious metal and recovery method using the same

본 발명은 폐액 내에 존재하는 유가금속을 흡착시켜 폐액으로부터 분리하여 회수하는 회수 장치 및 이를 이용한 유가금속 회수 방법에 관한 것으로, 폐액이 통과되면서 폐액 내 유가금속이온이 선택적으로 흡착되는 흡착수단이 설치되고, 상기 흡착수단의 외부를 감싸도록 배치되며, 상기 흡착수단에 흡착된 유가금속이온을 환원된 금속 형태로 회화(Incineration)시킬 수 있는 회화수단을 구비하는 유가금속 회수부 및 상기 흡착수단으로 고온의 열풍을 안내하여 상기 열풍에 의해 상기 흡착수단을 건조시킬 수 있도록, 열선이 내장된 급속가열수단을 구비하는 급속가열부를 포함하는 유가금속 회수 장치 및 이를 이용한 유가금속 회수방법을 제공한다. The present invention relates to a recovering apparatus for recovering valuable metals present in a waste liquid by separating and recovering them from a waste liquid, and a method for recovering valuable metals using the recovering apparatus, wherein an adsorption means is provided in which waste metal ions in the waste liquid are selectively adsorbed A valuable metal recovery unit disposed to surround the outside of the adsorption unit and capable of incising the valuable metal ion adsorbed on the adsorption unit into a reduced metal form, There is provided a valuable metal recovering apparatus including a rapid heating unit including a rapid heating means having a hot wire so that hot air can be guided to dry the adsorption means by the hot air, and a valuable metal recovering method using the same.

Method of removing molybdenum admixtures from manganese sulfate solution

1. СПОСОБ ОЧИСТКИ РАСТВОРА СУЛЬФАТА МАРГАНЦА ОТ ПРИМЕСЕЙ МОЛИБДЕНА путем адсорбции его двуокисью мар ганца, отличающийс  тем, что, с целью интенсификации процесса, адсорбцию ведут электролитически осажденной двуокисью марганца с размером частиц 0,5-5 мм. 2. Способ по п.1,отличающ и и с   тем, что регенерацию адсорбента ведут промывкой 5-25%-ным раствором едкого натра. 1. A method for purifying a manganese sulphate solution from molybdenum impurities by adsorbing manganese dioxide to it, characterized in that, in order to intensify the process, electrolytically precipitated manganese dioxide with a particle size of 0.5-5 mm is adsorbed. 2. The method according to claim 1, characterized by the fact that the adsorbent is regenerated by washing with 5-25% sodium hydroxide solution.

Method for reduction of precious metal from carboniferous ores

FIELD: reduction of precious metals from carboniferous ore. SUBSTANCE: method includes leaching of ore with solution of leaching agent and concentration of compounds of precious metal with leaching agent in solution on natural carboniferous component of ore for subsequent reduction. Absorbing volume of natural carboniferous component of ore may be supplemented by addition of recycled carboniferous substance or finely ground carbon to mixture of ore with leaching agent. After separation of carboniferous component of ore from barren rock. Barren rock material may be treated with the help of the processes of hot addition of carbon to leaching agent for further increase of reduction of precious metal. EFFECT: higher efficiency. 36 cl, 16 dwg, 3 tbl СОУЗОТсС ПЧ Го РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (19) ВИ” 2108 402‘ (51) МПК 13) СЛ С 22 В 11/00, 3/24 12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21), (22) Заявка: 94026267/02, 10.09.1993 (30) Приоритет: 22.09.1992 Ш$ 07/950.576 03.05.1993 1$ 08057.300 (46) Дата публикации: 10.04.1998 (56) Ссылки: Лодейщиков В.В. Извлечение золота из упорных руд и концентратов. - М.: Недра, 1968, с. 177 - 185. (86) Заявка РСТ: 4$ 9308488 (10.09.93) (71) Заявитель: Джеобиотикс, Инк (0$) (72) Изобретатель: Вильям Дж.Кохр[Ц$] (73) Патентообладатель: Джеобиотикс, Инк (05) (54) СПОСОБ ВОССТАНОВЛЕНИЯ ДРАГОЦЕННОГО МЕТАЛЛА ИЗ УГЛЕРОДИСТЫХ РУД (57) Реферат: Способ может быть использован для восстановления драгоценных металлов из углеродистой руды. Включает выщелачивание руды раствором выщелачивателя и — концентрирование соединений драгоценного металла С выщелачивателем в растворе на природном углеродистом компоненте руды для последующего восстановления. Поглощающий объем природного углеродистого компонента руды может пополняться за счет добавления рециклированного углеродистого вещества или тонкоизмельченного углерода в смесь руды с выщелачивателем. После отделения углеродистого компонента руды от пустой породы материал ...

Silver recovery

Method for recovering pure silver from acid insoluble silver salt contaminated with other metals by first washing the salt with water at a pH less than 3 and then reacting the washed salt with alkali metal borohydride at a pH greater than 12.

Method for enriching ruthenium in alumina-based waste ruthenium-loaded catalyst

一种富集氧化铝基废载钌催化剂中钌的方法，本发明采用酸性逆流浸出法，将氧化铝基废载钌催化剂在返回的盐酸溶液中进行一次酸性浸出，使其中的部分氧化铝溶解以实现钌的初步富集；一次酸性浸出所得浸出渣则加入新鲜的盐酸溶液进行二次酸性浸出，进一步使浸出渣中大部分氧化铝溶解，实现钌的二次富集，所得盐酸浸出液经过滤后返回一次酸性浸出；向一次酸性浸出液中加入沉淀剂实现溶液中钌的沉淀富集，沉淀后液则送往提铝工序。本发明铝的总浸出率大于88％，钌的沉淀率大于80％，浸出渣中钌富集9倍以上，整个工序钌的综合回收率大于98％。

Method for adsorbing and separating gallium from sulfuric acid leaching solution of zinc replacement residues

一种从锌置换渣硫酸浸出液中吸附分离镓的方法，所述的锌置换渣硫酸浸出液含Ga 3+ 20～500mg/L、Fe 3+ 1～10g/L、Zn 2+ 10～25g/L、Cu 2+ 1～15g/L、Cd 2+ 1～5g/L和As 3+ 10～100mg/L以及硫酸10～150g/L，其特征是步骤如下：1)将上述锌置换渣硫酸浸出液，按照流速1～10BV/h流经填充苯基磷酸酯功能基聚苯乙烯树脂的树脂柱，收集流出液，当流出液中镓浓度为进口的0.1～3％时停止；2)用0.25～1BV 200～400g/L的硫酸溶液，按照流速1～4BV/h流经完成吸附的树脂柱，收集流出液，得到硫酸镓解吸液；3)用2～4BV 4～8mol/L的盐酸溶液，按照流速1～4BV/h流经硫酸解吸后的树脂柱，得到硫酸铁解吸液，并完成树脂再生；4)再生后的树脂返回步骤1)使用。本发明方法可从锌置换渣硫酸浸出液中高效吸附分离镓，工艺简单且镓收率高。

A kind of hydrometallurgy precipitates carbon block solution block device

本发明涉及湿法冶金领域，尤其涉及一种湿法冶金沉淀炭块解块设备。本发明要解决的技术问题是提供一种解块速度快的湿法冶金沉淀炭块解块设备。为了解决上述技术问题，本发明提供了这样一种湿法冶金沉淀炭块解块设备，包括有过滤箱等；过滤箱顶部连接有冶金罐，冶金罐底部连接有出料管，出料管下端位于过滤箱内，过滤箱右侧下部设有出液管，过滤箱内倾斜连接有滤网，过滤箱左壁中部开有通孔，过滤箱左侧上部连接有开关装置，过滤箱左侧下部连接有收集箱，收集箱内左侧上部设有解块装置。本发明首先通过滤网将落入过滤箱内的液体和炭块进行分离，并且设置有开关装置和解块装置，能够让工人更加方便的打开或关闭圆形挡板。

Method and line of extracting noble metals by coal-sorption technology

FIELD: chemistry. SUBSTANCE: at autoclave desorption, hot solutions of eluates are produced, and metal is further concentrated on carbon. Coal is continuously mixed during the process. Enriched eluate is divided into two parts, one of which is sent after cooling for the secondary concentration of metals, and the remainder without cooling is sent to the metal electrolysis with subsequent feeding into the continuous desorption apparatus. The technological line contains the installation of metal sorption from solutions and/or slurries, the installation of a secondary concentration of metals, in which a rich eluate supply is fed to an electrolytic metal separating unit, the installation of the metal desorption. EFFECT: continuity of the technological process, increasing the concentration of noble metals, accelerating the electrolysis. 2 cl, 1 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 638 466 C2 (51) МПК C22B 11/08 (2006.01) C22B 3/24 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2016115708, 22.04.2016 (24) Дата начала отсчета срока действия патента: 22.04.2016 Дата регистрации: Приоритет(ы): (22) Дата подачи заявки: 22.04.2016 (43) Дата публикации заявки: 26.10.2017 Бюл. № 30 2041272 C1, 09.08.1995. RU 2123060 C1, 10.12.1998. UA 103842 C2, 25.11.2013. CN 103597103 A, 19.02.2014. (54) СПОСОБ И ЛИНИЯ ИЗВЛЕЧЕНИЯ БЛАГОРОДНЫХ МЕТАЛЛОВ ПО УГОЛЬНОСОРБЦИОННОЙ ТЕХНОЛОГИИ (57) Реферат: Изобретение относится к извлечению металлов, с последующей подачей в аппарат благородных металлов из цианистых растворов непрерывной десорбции. Технологическая линия и/или пульп по угольно-сорбционной технологии. содержит установку сорбции металлов из При автоклавной десорбции получают горячие растворов и/или пульп, установку вторичного растворы элюатов, при этом дополнительно концентрирования металлов, в которой концентрируют металл на угле. Уголь выполнено ответвление подачи богатого элюата непрерывно перемешивают по ходу в ...

A kind of recovery carries golden method in bronze charcoal

本发明涉及一种回收载金粉炭中金的方法，属于黄金行业载金粉炭处理的方法。包括载金粉炭在600～650℃范围内进行灰化；采用硝酸对炭灰进行除杂，过滤洗涤，得到除杂渣；采用王水法或氯盐法对除杂渣进行浸金，使金进入液相，过滤洗涤，得到浸金液；向浸金液中加入亚硫酸钠，对浸金液进行还原，过滤洗涤海绵金并烘干；将海绵金配以1%～5%的硼砂在1250℃熔炼铸锭。优点在于：简化了工艺流程，减轻了操作人员劳动强度，优化了工作环境，提高了载金粉炭金的回收率。

Method for recovering palladium in printed circuit board by selective leaching precipitation

本发明公开了一种选择性浸出沉淀回收印刷线路板中钯的方法。该方法以废旧线路板及元器件为原料，加入无水有机溶剂‑溴化盐体系进行选择性浸出反应，反应时间为30‑90min，浸出结束后过滤，向过滤后的浸出液中加选择性沉淀剂沉淀浸出液中的钯，实现钯的提纯和富集，本发明工艺简单、选择性好、回收率高、成本低廉，避免了使用大量强酸等有毒有害溶剂同时减少其他金属的浸出和沉淀，降低了后续金属的处理回收难度。

Method of processing sulphide oxidised copper ores with copper and silver extraction

Изобретение может быть использовано в обогащении меди и серебра для переработки сульфидно-окисленных медных руд. Перед подачей на кислотное выщелачивание при перемешивании коллективного концентрата, полученного из сульфидно-окисленной медной руды, осуществляют стадиальную коллективную флотацию с использованием добавки сульфида натрия. Перед первой стадией коллективной флотацией руду измельчают до частиц 140-190 мкм, а хвосты направляют на вторую стадию коллективной флотации. Перед началом второй стадии упомянутые хвосты измельчают до частиц 60-90 мкм. При этом сульфид натрия на стадиях коллективной флотации вводят через заранее определенные промежутки времени. Перед началом извлечения меди и серебра флотацией из кека выщелачивания концентрата кек измельчают до частиц 20-30 мкм. Техническим результатом является высокое извлечение меди и серебра, а также получение медного концентрата высокого качества. 1 з.п. ф-лы, 1 табл., 7 пр. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 604 279 C1 (51) МПК C22B 15/00 (2006.01) C22B 11/00 (2006.01) C22B 3/08 (2006.01) B03D 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ 2015134376/02, 14.08.2015 (24) Дата начала отсчета срока действия патента: 14.08.2015 (45) Опубликовано: 10.12.2016 Бюл. № 34 2 6 0 4 2 7 9 R U (54) СПОСОБ ПЕРЕРАБОТКИ СУЛЬФИДНО-ОКИСЛЕННЫХ МЕДНЫХ РУД С ИЗВЛЕЧЕНИЕМ МЕДИ И СЕРЕБРА (57) Реферат: Изобретение может быть использовано в коллективной флотации. Перед началом второй обогащении меди и серебра для переработки стадии упомянутые хвосты измельчают до частиц сульфидно-окисленных медных руд. Перед 60-90 мкм. При этом сульфид натрия на стадиях подачей на кислотное выщелачивание при коллективной флотации вводят через заранее перемешивании коллективного концентрата, определенные промежутки времени. Перед полученного из сульфидно-окисленной медной началом извлечения меди и серебра флотацией из руды, осуществляют стадиальную коллективную кека ...

Method for recovering palladium catalyst

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Patent FR2331363B1

Method for efficiently separating silver, platinum and palladium from silver anode mud

本发明公开了一种银阳极泥高效分离银、铂、钯的方法，将浓硝酸、双氧水、过氧化钠、软化水配制成氧化液；将银阳极泥与氧化液按照质量比4～8:1混合均匀，在40～70℃的条件下，搅拌浸出50～150min，固液分离，得到分银液与分银渣；将分银渣与王水按照质量比2～4:1进行混合，在50～90℃的条件下反应2～6h后，得到分金液；调整分金液的pH至5～6，加入亚硫酸氢钠，在50～60℃的条件下进行金还原，得到金粉；向分银液中加入10～40g/L氯化钠，在50～65℃的条件下反应0.3～1h，经固液分离后，得到氯化银与沉银后液；向沉银后液中加入亚硫酸氢钠，在80～90℃的条件下反应0.5～2h后，得到铂钯精矿。本发明采用硝酸结合添加剂，实现银阳极泥中银、铂、钯的高效浸出，有利于后续铂钯的综合回收，提高金的品质。

Technique for efficient and environment-friendly recovery of palladium from sliver anode slime parting liquid

本发明提供一种从银阳极泥分金液中高效绿色回收钯的工艺，其主要分为以下阶段：分金液浓缩结晶阶段、浓缩液沉银洗涤阶段、氧化及沉钯阶段、除杂提纯阶段、钯还原及烘干阶段。该工艺全部采用常规设备，操作简单，所用药剂成本经济，无需调节原溶液的酸碱度，生产效率高，绿色环保。所得产品纯度高，质量好，适用于低浓度含钯液中提取钯的生产实践。

A method of recycling silver from steel works sintering dirt mud

本发明涉及一种从钢铁厂烧结尘泥中回收银的方法，属于资源综合回收技术领域。本发明首先将氯化铵与钢铁厂烧结尘泥混合均匀，制成混合料。向纯水中加入氯化钠、氯化钾和氯化钙中的一种或几种搅拌均匀后形成配位浸出剂，将物料中的银转化为易溶解的络合离子进入溶液，同时利用氯化铵中的铵根离子将溶解的铁离子转化为难溶的黄铵铁矾沉淀，达到抑制铁的溶出，避免铁离子对银浸出的不利影响和提高银的浸出率的目的。本发明实现银的选择性浸出，且没有有害气体排出，具银浸出率高、操作简单、环境友好的特点。

Method of sorption extraction of chromium (vi) from aqueous solutions

FIELD: technological processes. SUBSTANCE: invention relates to extraction of substances using sorbents, particularly use of inorganic materials for extraction from aqueous solutions of toxic compounds of chromium (VI). Sorption extraction of chromium (VI) from aqueous solutions involves treatment of the solution with an inorganic sorbent based on titanium dioxide under the action of ultraviolet radiation with subsequent separation of the sorbent. Solution is treated at pH 5.0 in an acetate buffer medium. Sorbent used is mechanically activated titanium dioxide with particle size of not more than 20 nm of rutile modification with ratio sorbent : solution 1:30÷60 for 1.5–3.0 hours. Sorbent is separated by coagulation with potassium dihydrophosphate (KH 2 PO 4 ) while heating to 50 °C and holding at this temperature for 30 minutes. EFFECT: method provides high degree of chromium sorption in form of chromium (VI) ions. 1 cl, 2 dwg, 1 tbl, 3 ex РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 740 685 C1 (51) МПК C22B 34/32 (2006.01) C22B 3/24 (2006.01) C02F 101/22 (2006.01) C02F 1/32 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК C22B 34/32 (2020.08); C22B 3/24 (2020.08); C02F 1/32 (2020.08) (21)(22) Заявка: 2020126996, 11.08.2020 (24) Дата начала отсчета срока действия патента: Дата регистрации: 19.01.2021 (45) Опубликовано: 19.01.2021 Бюл. № 2 2 7 4 0 6 8 5 R U (56) Список документов, цитированных в отчете о поиске: NASIRI E.F. et al. An Experimental Study on the Simultaneous Phenol and Chromium Removal From Water Using Titanium Dioxide Photocatalyst. Civil Engineering Journal, 2018, V.4, N3, p. 585-593. RU 2596744 C1, 10.09.2016. SU 1225617 A1, 23.04.1986. EA 14285 B1, 29.10.2010. CN 107473310 A, 15.12.2017. CN 104787952 A, 22.07.2015. (54) Способ сорбционного извлечения хрома (VI) из водных растворов (57) Реферат: Изобретение относится к области извлечения ацетатного буфера. В качестве сорбента веществ с ...

Method for recovering silver from by-products generated in an electrode manufacturing process

본 발명은 전극 공정 부산물로부터 은을 회수하는 방법에 관한 것으로, 상기 회수 방법에 의하면 전극 공정 부산물, 특히 저온 동시 소성 세라믹(Low Temperature Co-fired Ceramic; LTCC) 공정부산물로부터 상기 전극 공정 부산물에 함유된 저농도의 은을 고순도의 은 나노입자로 회수할 수 있다. 또한, 상기 회수방법은 종래기술에 비해 은 회수 공정이 단순하고 폐수 발생이 적어 간편하면서도 공정 비용을 절감할 수 있어 경제적이다.

A kind of technique rotating pyrogenic process Recover palladium platinum

本发明涉及一种旋转火法回收钯铂的工艺。本发明提供一种从含钯铂物料中回收钯铂的工艺，具体为将焚烧研磨后的含钯铂灰料与面粉、酵母素一起发酵，然后加入催化剂高温旋转焚烧金属捕集剂及催化剂高温熔融，从而富集钯铂金属的方法。使用本发明提供的工艺从含有钯铂的王水难处理物料灰粉中进行回收钯铂，减短处理周期，降低了三废产量，有效地提高了富集率。

Method for recovering gold from fine-grain gold-loaded carbon

本发明公开了一种从细粒载金炭中回收金的方法，涉及湿法冶金领域。该方法将细粒载金炭与不含金的粗粒活性炭混合，使用溶液药剂将细粒载金炭中的金有效转移到了磨洗过的粗粒新活性炭中，再进行解吸、电积作业。该方法优化了金回收的工艺流程，显著提高了金的回收率，达到92.8％‑95.6％；相对于传统的回收工艺，该方法工艺简单、金回收率高、成本低且环保无污染，社会、经济效益显著。

Method for recovering gold by solvent extraction

본 발명은 유기 추출 용액으로서 물에 저조하게 용해될 수 있는 디에스테르-기재 시약을 사용하여 금-포함 고체를 함유하는 슬러리 또는 산성 염화물-함유 수용액으로부터 용매 추출에 의해 금을 회수하는 방법에 관한 것이다. 이 방법에 따르면, 금이 매우 효과적으로 추출되지만, 기타 귀금속 및 많은 기타 금속이 상당히 적게 추출된다. 금은 순수한 물을 사용하여 추출 상으로부터 스트리핑되고, 이로부터 금은 화학적 또는 전기화학적으로 환원될 수 있다.

Purification Method of Platinum Group Powder

본 발명은 백금의 정제방법에 관한 것으로, 백금 정제 난용성 중간물, 즉 염화플라티늄산 암모늄 (NH 4 ) 2 PtCl 6 을 수산암모늄 (NH 4 ) 2 C 2 O 4 로 환원시킨 후 염화플라티늄산 암모늄 (NH 4 ) 2 PtCl 4 를 과산화수소 산화제 H 2 O 2 와 염산 HCl의 혼합물에 의해 염화플라티늄산 (NH 4 ) 2 PtCl 6 로 되돌려 재침전시키는 방법이다. The present invention relates to a method for purifying platinum, comprising: reducing a platinum-purified poorly soluble intermediate, that is, ammonium platinum (NH 4 ) 2 PtCl 6 with ammonium hydroxide (NH 4 ) 2 C 2 O 4 , followed by ammonium platinum (NH 4 ) 2 PtCl 4 is a method in which a mixture of hydrogen peroxide oxidizing agent H 2 O 2 and HCl is returned to platinum chloride (NH 4 ) 2 PtCl 6 for reprecipitation. 이 때, pH<1인 산성 매질에서 중간 이수화물 착체 [PtCl 4 (H 2 O) 2 ] 0 을 형성하는 방법으로 재침전시킨다. 이렇게 재침전을 시킬 때 정제 중간물인 염화플라티늄산 암모늄 (NH 4 ) 2 PtCl 6 을 혼합물로부터 보다 완전하게 정제할 수 있다. At this time, it is reprecipitated by the method of forming an intermediate dihydrate complex [PtCl 4 (H 2 O) 2 ] 0 in an acid medium having a pH <1. In this reprecipitation, the purification intermediate, ammonium platinum chloride (NH 4 ) 2 PtCl 6 , can be more completely purified from the mixture. 백금, 정제 Platinum tablets

Separation of metals

FIELD: metallurgy.SUBSTANCE: invention relates to processes of separating metals, particularly separation of precious metals, such as platinum and palladium, by liquid extraction. Invention also discloses novel mixtures for liquid extraction. Due to simultaneous use of various extraction mechanisms for extraction of multiple different metals, simple and convenient process of their separation can be achieved. In particular, use of different extraction mechanisms for simultaneous extraction of metals from aqueous acid phase into organic phase enables separation of extracted metals by selective re-extraction from organic phase using simple and mild conditions.EFFECT: technical result is possibility of separation of two or more metals after one stage of liquid extraction due to possibility of selective re-extraction of metals from organic phase.19 cl, 3 dwg, 14 tbl, 6 ex РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 685 618 C2 (51) МПК C22B 11/00 (2006.01) C22B 3/26 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК C22B 11/00 (2018.08) (21) (22) Заявка: 2017101408, 16.06.2015 (24) Дата начала отсчета срока действия патента: 16.06.2015 (72) Автор(ы): ГОРДОН, Росс Джон (GB), ГРАНТ, Ричард (GB) 22.04.2019 18.06.2014 GB 1410883.1 (43) Дата публикации заявки: 18.07.2018 Бюл. № (56) Список документов, цитированных в отчете о поиске: US 0005045290 A1, 03.09.1991. JP 9203792 А, 05.08.1997. JP 2001098335 А, 10.04.2001. WO 99/14385 А1, 25.03.1999. EP 0756013 А1, 29.01.1997. RU2103394 С1, 27.01.1998. RU 96104848 А, 27.02.1998. 20 (45) Опубликовано: 22.04.2019 Бюл. № 12 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 18.01.2017 C 2 (86) Заявка PCT: GB 2015/051762 (16.06.2015) 2 6 8 5 6 1 8 C 2 (87) Публикация заявки PCT: R U 2 6 8 5 6 1 8 Приоритет(ы): (30) Конвенционный приоритет: R U (73) Патентообладатель(и): ДЖОНСОН МЭТТИ ПАБЛИК ЛИМИТЕД КОМПАНИ (GB), ЭНГЛО ЭМЕРИКЕН ПЛЭТИНУМ ЛИМИТЕД (ZA) Дата регистрации: WO ...

A kind of method of valuable metal in separate precious metal enrichment material

一种分离贵金属富集物料中有价金属的方法，包括以下步骤：（1）将贵金属富集物料浆化，在搅拌下加入酸与氯盐，采用O 3 与O 2 的混合气体以及除O 3 与O 2 的强氧化剂协同氧化浸出贵金属富集物料，固液分离得到浸金液与浸金渣；（2）向浸金液中加入不含重金属的还原剂，监测溶液电位，当溶液电位达到预定值后停止添加还原剂，固液分离得到粗金粉和还原后液；（3）向还原后液中加入活性铜粉，置换得到铂钯精矿和置换后液。本发明中贵金属浸出时氧化剂用量少、贵金属浸出率高、金直收率高、污染小。

Platinum-palladium efficient extraction and separation system and extraction and separation method thereof

本发明公开了一种铂钯高效萃取分离系统及其萃取分离的方法，包括萃取装置、洗涤分相槽、反萃装置、再生分相槽、平衡分相槽，所述萃取装置由一级萃取分相槽和二级萃取分相槽串联组成，所述反萃装置由一级反萃分相槽和二级反萃分相槽串联组成，各分相槽上均包含一个螺旋形分相通道48，在螺旋形分相通道48的末端有一个油相出口、一个水相出口，在螺旋形分相通道48的中心位置设有混合液稳流隔板50，下方安装有超声波发生器49；本发明萃取效率高，油水相在反应装置内得到充分接触，采用2级可以达到原来萃取箱6级的效果，采用7级替代了原来22级从萃取到平衡的5个步骤，且铂钯分离彻底。

Method of sorption extraction of rhenium from aqueous solutions

FIELD: metallurgy.SUBSTANCE: invention relates to hydrometallurgy of rare elements, in particular to methods of using organic sorbents for extraction of rhenium (VII) ions from aqueous solutions, including for subsequent determination of their concentration. Sorption extraction of rhenium from aqueous solutions is carried out. Sorption is carried out in a medium of an acetate buffer under static conditions with an organic sorbent while maintaining certain pH values and the sorbent : solution ratio with subsequent separation of the sorbent. Organic sorbent used is a polyallylamine-based sorbent, and the sorption is carried out while maintaining the pH value = 2.8–5.1.EFFECT: invention increases degree of sorption of rhenium from aqueous solutions.4 cl, 2 dwg, 2 tbl, 3 ex РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 710 615 C1 (51) МПК C22B 61/00 (2006.01) C22B 3/24 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК C22B 61/00 (2019.08); C22B 3/24 (2019.08) (21)(22) Заявка: 2019126076, 16.08.2019 (24) Дата начала отсчета срока действия патента: Дата регистрации: 30.12.2019 (45) Опубликовано: 30.12.2019 Бюл. № 1 Адрес для переписки: 620016, г. Екатеринбург, Амундсена, 101, ИМЕТ, нач. отдела патентной и изобретательской работы, Сандлер Л.А. C 1 2 7 1 0 6 1 5 R U (54) Способ сорбционного извлечения рения из водных растворов (57) Реферат: Изобретение относится к гидрометаллургии поддержании определенных показателей рН и редких элементов, в частности к способам соотношения сорбент : раствор с последующим применения органических сорбентов для отделением сорбента. В качестве органического извлечения из водных растворов ионов рения сорбента используют сорбент на основе (VII), в том числе для последующего определения полиаллиламина, а сорбцию ведут при их концентрации. Проводят сорбционное поддержании показателя рН=2,8-5,1. Изобретение извлечение рения из водных растворов. Сорбцию позволяет повысить степень сорбции рения из ...

Method for separating selenium and arsenic from alkaline leaching solution containing selenium and arsenic

本发明公开了一种从含硒砷碱性浸出液中分离硒和砷的方法，包括以下步骤：(1)将Ca‑Al‑Cl型吸附剂加入到待处理的含硒砷碱性浸出液中并搅拌，控制所述含硒砷碱性浸出液的温度为70～100℃，过滤，得到滤液A和含砷滤渣；(2)在所述滤液A中加入Ca‑Al‑Cl型吸附剂并搅拌，控制滤液A的温度为10～60℃，过滤，得到含硒滤渣和滤液B；(3)将所述含硒滤渣烘干，加入到氯盐溶液中，搅拌，固液分离，得到含硒洗液和再生的吸附剂，并从含硒洗液中回收硒。本发明的分离硒和砷的方法中，操作简单，选择性吸附仅需控制温度，效果稳定且分离效果好，砷的去除率高于90％，硒的吸附率高于90％，盐洗解吸率大于90％。

Pulp gold extracting process with steps divided in thin pulp screening mode

本发明公开了以筛出稀矿浆的方式来分步的矿浆提金工艺，对磨细矿浆用筛稀浓缩分出筛下浆和筛上浆，之后对筛上浆进行浸出；在多段流程中，还对先行浸出的矿浆用筛稀浓缩或筛稀滤分出筛下浆，用活性炭或树脂来处理筛下稀矿浆，并在后段组合使用常规矿浆提金方法。其中筛稀浓缩用本发明人的专利CN201520280642.1制成的推拉式挂折筛或CN201520280643.6制成的振动式挂折筛来实现，筛稀滤用以筛网为过滤介质的压滤机来实现。本发明的优点是以筛稀浓缩取代澄清浓缩，其脱水快速、造价低，挂折筛的脱水效能可充分发挥，对稀矿浆可以省去沉淀池脱泥工序；对于用活性炭吸附的多段流程，稀矿浆对富载金银炭的磨损小，随炭屑流失的金银少。

A kind of preparation method of small specific gravity palladium sponge

本发明涉及一种小比重海绵钯的制备方法，适用于从各种含钯原料中回收制备小比重海绵钯，包括以下步骤：步骤一、将待还原的黄渣加入到一定量纯净水中调成浆状，再加入氨水溶解，直到黄渣全部溶解；步骤二、将黄渣溶解液加热到一定温度；步骤三、边搅拌边向还原釜中缓慢加入还原剂；步骤四、还原剂加完后继续搅拌一定时间并维持一定温度；步骤五、当还原母液清澈透亮后，将海绵钯过滤，漂洗烘干，制得疏松多孔的小比重高活性海绵钯产品。本发明的显著效果在于：(1)工艺简单，操作简便，钯还原率大于99.98％。(2)可以制得比重小于0.5g/cm3的海绵钯，易被王水与硝酸溶解且无不溶渣。

A method of producing a sorbent from ammonium chloride

РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2015 138 384 A (51) МПК B01J 20/26 (2006.01) C22B 3/24 (2006.01) C22B 11/00 (2006.01) C22B 15/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2015138384, 09.09.2015 Приоритет(ы): (22) Дата подачи заявки: 09.09.2015 (43) Дата публикации заявки: 15.03.2017 Бюл. № 08 R U (57) Формула изобретения 1. Способ получения пергидро(1,3,5-дитиазин)-5-ил-метана взаимодействием формальдегида, сульфида натрия и аминосоединения, осуществляющимся путем смешения кристаллического сульфида натрия или его водного раствора с водным раствором формальдегида и аминосоединением, отличающийся тем, что в качестве аминосоединения используют хлорид аммония. 2. Способ по п. 1, отличающийся тем, что хлорид аммония и формальдегид берут в молярном соотношении 1:3,5. 3. Способ по п. 1, отличающийся тем, что введение формальдегида в реакционную смесь осуществляют в два этапа. 4. Способ по п. 3, отличающийся тем, что в первом этапе реакции формальдегид вводят в молярном соотношении к хлориду аммония, равном 1:2. 5. Способ по п. 3, отличающийся тем, что взаимодействие хлорида аммония с формальдегидом в первом этапе реакции проводят при температуре 100°C. 6. Способ по п. 3, отличающийся тем, что во втором этапе реакции формальдегид вводят в молярном соотношении к хлориду аммония, равном 1:1,5. 7. Способ по п. 3, отличающийся тем, что во втором этапе реакции взаимодействие хлорида аммония с формальдегидом проводят при температуре не выше 30°C. Стр.: 1 A 2 0 1 5 1 3 8 3 8 4 A (54) Способ получения сорбента из хлорида аммония 2 0 1 5 1 3 8 3 8 4 (72) Автор(ы): Дальнова Ольга Александровна (RU), Барановская Василиса Борисовна (RU), Еськина Василина Витальевна (RU), Дальнова Юлия Сагитовна (RU), Дальнова Наталья Александровна (RU), Донцова Галина Александровна (RU), Рубцов Владимир Николаевич (RU), Алексеев Сергей Васильевич (RU) R U Адрес для переписки: 119991, Москва, ГСП-1, В-49, Ленинский пр-кт, 4, МИСиС, ...

Method for enriching platinum from oxidized leached sediment of silicon-aluminum-based platinum-containing dead catalyst

本发明公开了一种从硅铝基含铂废催化剂氧化浸出沉淀物中富集铂的方法，具体是：(1)在搅拌状态下向沉淀物中缓慢加入絮凝剂溶液，静置10～15min，过滤，所得滤饼用水多次洗涤，测量每次洗涤后洗水中的铂浓度，直至洗水中铂含量小于0.5mg/L，停止水洗；(2)将滤液A与洗水合并，调整溶液pH为0.5～1，测量溶液中的铂浓度，根据溶液中铂的金属量，按照过量系数为1～2加入铜粉进行置换，过滤，得到含铜的铂粉和滤液B；(3)滤液B中加入活性炭进行吸附，过滤，得到负载铂的活性炭和尾液，尾液直接作为废水处理。本发明通过加入絮凝剂，解决固液分离问题，然后采用金属置换回收其中70～80％的铂，再采用活性炭吸附溶液中低浓度的铂，节约成本，铂的回收率高。

METHOD AND LINE FOR EXTRACTION OF NOBLE METALS

А 2016115708 ко РОССИЙСКАЯ ФЕДЕРАЦИЯ ходах а зд ща ДЕРАЦ (19) РЦ (11) 3 С \ < Хх аа А (51) МПК С228В 11/08 (2006.01) С228В 3/24 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2016115708, 22.04.2016 (71) Заявитель(и): Федеральное государственное бюджетное образовательное учреждение высшего образования "Иркутский национальный Приоритет(ы): (22) Дата подачи заявки: 22.04.2016 (43) Дата публикации заявки: 26.10.2017 Бюл. № 30 исследовательский технический университет" (ФГБОУ ВО "ИРНИТУ") (КО), Адрес для переписки: Открытое акционерное общество 664074, Иркутская обл. г. Иркутск, а/я 163, "Южуралзолото группа Компаний" (КО) Шестаковой Татьяне Александровне (72) Автор(ы): АИлшин Виктор Владимирович (КП), Кольцов Владимир Петрович (КП), Мельник Сергей Александрович (КП) (54) СПОСОБ И ЛИНИЯ ИЗВЛЕЧЕНИЯ БЛАГОРОДНЫХ МЕТАЛЛОВ (57) Формула изобретения 1. Способ извлечения благородных металлов, включающий сорбцию их на угле, автоклавную десорбцию с получением горячих растворов элюатов и электролиз, отличающийся тем, перед автоклавной десорбцией дополнительно концентрируют количество металла на угле, на всех этапах по ходу технологического процесса уголь непрерывно перемещают, а на этапах концентрирования металлов и десорбции в противотоке (углю) подают жидкую часть рабочей среды (элюат), при этом обогащённый в результате десорбции по ценным компонентам элюат разделяют на две части, одну из которых после охлаждения направляют в колонну с углем для вторичного концентрирования металлов, а оставшуюся часть элюата без охлаждения направляют на электролиз металлов, с последующей подачей на вход аппарата непрерывной десорбции, при этом соотношение разделяемых частей богатого элюата регулируют для оптимизации процесса по производительности и энергозатратам. 2. Линия извлечения благородных металлов из цианистых растворов и/или пульп по угольно-сорбционной технологии, включающая установленные по ходу технологического процесса и ...

Patent FR2485510B1

HYDROMETALLURGICAL PROCESS FOR THE RECOVERY OF METALS

L'invention a pour objet un procédé hydrométallurgique pour la récupération d'un métal contenu dans une source métallifère, caractérisé en ce qu'on soumet ladite source à une lixiviation à l'aide d'une solution ammoniacale de sel d'ammonium, on met la solution en contact avec un absorbant solide qui a subi un traitement préalable à l'aide d'un acide afin de sélectivement adsorber les ions métalliques dissous, et on récupère le métal cherché.

Process for recovering gold and other precious metals present in carbonaceous ores.

L'invention concerne le lessivage d'un minerai renfermant un métal précieux avec une solution de lixiviation, puis la concentration des complexes métal précieux-agent de lixiviation en solution sur le constituant carboné naturel du minerai pour une séparation ultérieure. La capacité de masquage par imprégnation de ce constituant carboné naturel peut être augmentée par addition de matière carbonée recyclée ou de carbone finement broyé au mélange minerai-agent de lixiviation. Après séparation du constituant carboné de la gangue, la gangue peut être soumise à un traitement de carbone dans une solution de lessivage à chaud pour accroître la séparation du métal précieux. Application: procédés perfectionnés de récupération de métaux précieux présents dans des minerais carbonés.

Finely divided platinum extraction - from platinum azide complexes with sulphuric acid at high temp and reducing the platinum

Finely divided Pt is obtd. by treating Pt azide complexes, pref. K tetranitroplatinate or Pt dinitrodianine with aq. sulphuric acid, 40 to 50% conc. for the former and 80 to 90% for the latter, and then reducing the resulting Pt aquasulphate with hydrazine hydrate in a molar ratio 10:1 or with an aq. alkali of 10 to 30% concn. Alternatively, the Pt aquasulphate may be treated with a 5% aq. alkali soln. and the resulting Pt hydroxosulphate dissolved in water and then pptd. onto activated carbon. The process time is reduced and more highly specific surface sizes obtained.

PROCESS FOR RECOVERING GOLD AND OTHER PRECIOUS METALS FROM CARBON ORES.

Patent FR2475576B1

Activation of a mineral species

A method of activating a mineral species wherein the mineral species is activated by fine or ultra fine milling prior to processing by methods of oxidative hydrometallurgy. The milled mineral species may be subjected to oxidative leaching under relatively mild conditions of pressure and temperature due to the milling producing minerals which are activated, and which thus react far more readily with oxidants such as oxygen. Furthermore, the oxidative leaching is. able to be conducted under conditions requiring less than stoichiometric levels of oxidant, again due to the activated nature of the minerals.

Patent FR2468654B1

Patent FR2260370A1

PROCESS FOR ISOLATING METALS FROM THEIR SOLUTIONS BY CONTACTS WITH PROTEIN MATERIALS

PROCEDE POUR SEPARER DES METAUX, EN PARTICULIER DES METAUX PRECIEUX, DE LEURS SOLUTIONS AQUEUSES DILUEES. ON MET CES SOLUTIONS EN CONTACT AVEC UNE MATIERE PROTEIQUE CHOISIE DANS LE GROUPE FORME PAR LES PLUMES, LES POILS, LA FARINE DE SABOT ET LA FARINE DE CORNE PENDANT UNE DUREE SUFFISANTE POUR QUE LES METAUX CONTENUS DANS LA SOLUTION PASSENT A L'ETAT INSOLUBLE DANS L'EAU ET SOIENT ABSORBES PAR LA MATIERE PROTEIQUE QUI EST ENSUITE SEPAREE ET TRAITEE POUR RECUPERATION DES METAUX. LE CONTACT PEUT ETRE REALISE AVANTAGEUSEMENT A CONTRE-COURANT. PROCESS FOR SEPARATING METALS, IN PARTICULAR PRECIOUS METALS, FROM THEIR DILUTED AQUEOUS SOLUTIONS. THESE SOLUTIONS ARE PLACED IN CONTACT WITH A PROTEIN MATERIAL CHOSEN FROM THE GROUP FORMED BY FEATHERS, HAIR, HOG FLOUR AND HORN FLOUR FOR A SUFFICIENT TIME FOR THE METALS CONTAINED IN THE SOLUTION TO ACCEPT AN INSOLUBLE STATE IN THE SOLUTION. THE WATER IS ABSORBED BY THE PROTEIN MATERIAL WHICH IS THEN SEPARATED AND TREATED FOR METAL RECOVERY. CONTACT CAN BE MADE ADVANTAGEOUSLY IN COUNTER-CURRENT.

Improvements to facilities for extracting gold from seawater

IMPROVED PROCESS FOR RECOVERING PRECIOUS METALS FROM BIMETALLIC MATERIALS

L'INVENTION CONCERNE UN PROCEDE DE RECUPERATION DE METAUX PRECIEUX A PARTIR DE MATIERES BIMETALLIQUES. LES CARACTERISTIQUES AMELIOREES DU PROCEDE COMPRENNENT LE TRAITEMENT D'UN FILTRAT DE LIQUEUR DE REJET PAR UNE RESINE D'ECHANGE IONIQUE DU TYPE ACIDE CARBOXYLIQUE POUR FORMER UN COURANT DE LIQUEUR DE REJET SENSIBLEMENT EXEMPT D'ELEMENTS METALLIQUES DE BASE. LA RESINE D'ECHANGE IONIQUE EST REGENEREE EN FAISANT PASSER A TRAVERS ELLE UN LIQUIDE AQUEUX DE LIXIVIATION COMPRENANT UN SEL D'AMMONIUM DANS UNE SOLUTION AMMONIACALE. LE LIQUIDE AQUEUX RESULTANT DE LA REGENERATION CONTENANT ALORS DES ELEMENTS METALLIQUES DE BASE, PEUT ETRE UTILISE DANS LE PROCEDE POUR RECUPERER LES METAUX PRECIEUX. DOMAINE D'APPLICATION : RECUPERATION DES METAUX PRECIEUX TELS QUE L'OR OU L'ARGENT. THE INVENTION RELATES TO A PROCESS FOR RECOVERING PRECIOUS METALS FROM BIMETALLIC MATERIALS. THE IMPROVED CHARACTERISTICS OF THE PROCESS INCLUDE THE TREATMENT OF A DISCHARGE LIQUOR FILTRATE WITH A CARBOXYLIC ACID TYPE IONIC EXCHANGE RESIN TO FORM A DISCHARGE LIQUEUR CURRENT SENSITIVELY FREE OF BASE METAL ELEMENTS. THE ION EXCHANGE RESIN IS REGENERATED BY PASSING THROUGH IT AN AQUEOUS LEACHING LIQUID CONTAINING AN AMMONIUM SALT IN AN AMMONIA SOLUTION. THE AQUEOUS LIQUID RESULTING FROM REGENERATION, THEN CONTAINING BASIC METAL ELEMENTS, CAN BE USED IN THE PROCESS TO RECOVER PRECIOUS METALS. FIELD OF APPLICATION: RECOVERY OF PRECIOUS METALS SUCH AS GOLD OR SILVER.

High purity gold production process

Hydrometallurgical recovery of lead and silver from secondary material - with trivalent iron redn. after leaching and before cementation

In the recovery of lead and silver from secondary material (esp from the zinc hydrometallurgical industry), contg divalent Pb, Ag and impurities mainly of Fe and Zn, by leaching at above 90 deg C in the presence of caloium chloride to give a Pb and Ag chloride-contg soln of pH less than 2 (pref less than 1), filtering off insolubles, cementing Pb and Ag from the soln. and then separating the impurity metals and cementing metal from the resulting soln. The improvement is that the filtered chloride soln is treated by (a) reducing trivalent Fe; (b)increasing its pH to about 2 by addn of Pb, Zn or Ca oxide; (C)adding the cementing metal while reducing the temp of the soln to below 80 deg C; (d)separating the cemented metals; (e)neutralising the soln to a pH of at least 5.5 by lime addn to the soln at not less than 70 deg C to ppte impurity and cementing metals as their hydroxides; and (f)recovering a calcium chloride soln for re-use in leaching. By pre-reducing Fe(3+) to Fe(2+), conditions suitable for complete dissolution of Ag and Pb can be used without causing problems of ferric hydroxide pptn., which prevents Ag cementation and contaminates the cemented Pb, when the pH is increased to 2 and without having to reduce hydrogen ions by introduction of foreign metal ions. The hydroxide pptes are easily filtered from the soln to give a calcium chloride soln of sufficient purity for re-use.

METHOD AND APPARATUS FOR RECOVERING PRECIOUS METALS FROM BIMETALLIC MATERIAL

La présente invention concerne un procédé et un appareil pour récupérer un métal précieux, à l'état de métal pur ou sous forme alliée, à partir d'un matériau bimétallique 18 dans lequel le métal précieux est mécaniquement lié à un matériau de base comprenant au moins un métal de base, par exemple le cuivre, le laiton ou le bronze. Conformément à l'invention, le matériau de base est séparé par lixiviation en 20 au moyen d'une solution ammoniacale d'un sel d'ammonium, de préférence le carbonate d'ammonium, en utilisant un liquide de lixiviation contenant de l'oxygène réactif. Le métal ou les métaux de base sont extraits sous forme de composés métalliques par décomposition thermique en 33 de la liqueur de lixiviation chargée résultante, tandis que l'ammoniac et le sel d'ammonium sont reconstitués en 42 et recyclés en 54. L'invention convient particulièrement à la récupération de l'or allié à partir des chutes d'or doublé. The present invention relates to a method and apparatus for recovering a precious metal, in the pure metal state or in alloy form, from a bimetallic material 18 in which the precious metal is mechanically bonded to a base material comprising at minus a base metal, for example copper, brass or bronze. In accordance with the invention, the base material is separated by leaching at 20 using an ammoniacal solution of an ammonium salt, preferably ammonium carbonate, using a leach liquid containing oxygen. reagent. The base metal or metals are extracted as metal compounds by thermal decomposition at 33 of the resulting charged leach liquor, while the ammonia and ammonium salt are reconstituted at 42 and recycled at 54. The invention particularly suitable for recovering alloyed gold from scrap doubled gold.

Method of recovering gold from anode slimes

ABSTRACT OF THE DISCLOSURE A method of recovering gold from anode slimes result-ing from electrolytic copper refining comprises treating the anode slimes to remove copper and selenium, forming an aqueous slurry from the treated slimes, blowing chlorine gas into the aqueous slurry to dissolve the gold therein, and separating the so-dissolved gold from the residue.

Leaching process for copper concentrates with a carbon catalyst

A method of recovering copper from a copper sulfide concentrate comprising a copper arsenic sulfosalt or a copper antimony sulfosalt, using carbon as a catalyst. The concentrate and carbon are added to an acidic sulfate leach solution. The copper is leached from the concentrate, in the presence of an oxygen-containing gas. The operating potential is maintained above a selected level. The carbon copper sulfide ratio of the carbon being added to the copper sulfide present in the concentrate being added is at least 1 :20. The carbon may be maintained above a selected concentration in the leach solution. The leached copper is recovered from the solution by conventional methods.

Process for recovering noble metals