A PROCESS FOR TREATING A SULFUROUS FLUID TO FORM GYPSUM AND MAGNESIUM CARBONATE

A process for treating a sulfurous fluid to form gypsum and magnesium carbonate, whereby the sulfurous fluid is scrubbed with a sequestrating agent to yield a scrubbed fluid, gypsum and magnesium sulfate. The flue gas desulfurized gypsum is isolated from the magnesium sulfate solution by filtration or centrifugation. The magnesium sulfate is reacted with a carbonate salt to produce a magnesium carbonate whereby the reaction conditions are controlled to control the properties of the magnesium carbonate produced. 1. A process for treating a sulfurous fluid to form gypsum and magnesium carbonate , comprising:contacting the sulfurous fluid with a sequestrating agent to yield a scrubbed fluid, gypsum and magnesium sulfate; andreacting a carbonate salt with the magnesium sulfate to produce a magnesium carbonate.2. The process of claim 1 , further comprising separating at least a portion of the gypsum from the magnesium sulfate to form a gypsum product.3. The process of claim 2 , wherein the separating is by filtration or centrifugation.4. The process of claim 2 , wherein the moisture content of the gypsum product after separating does not exceed 10%.5. The process of claim 2 , wherein the gypsum product comprises at least one impurity selected from the group consisting of a carbonate claim 2 , a sulfate claim 2 , an iron mineral claim 2 , and an organic species.6. The process of claim 1 , wherein the sequestrating agent is a calcium-containing carbonate mineral.7. The process of claim 6 , wherein the calcium-containing carbonate material is dolomite or dolomitic limestone.8. The process of claim 6 , wherein the calcium-containing carbonate mineral has an average particle size ranging from 50 μm to 100 μm.9. The process of claim 1 , wherein the sulfurous fluid is a flue gas with a temperature ranging from 350° C. to 1200° C.10. The process of claim 1 , wherein the contacting removes 98 to 99% of sulfur from the sulfurous fluid.11. The process of claim 1 , further ...

PRE-TREATMENT AGENT AND PRE-TREATMENT METHOD FOR ANTITHROMBIN III TO BE SUBJECTED TO LIMULUS TEST

To provide means for reducing reaction interference observed when AT III is subjected to test, whereby the test of antithrombin III can be carried out at high accuracy. Reaction interference observed when AT III is subjected to test can be reduced by subjecting AT III to a protein inactivation treatment in the co-presence of a divalent metal salt. 1limulus. A pre-treatment method for antithrombin III to be subjected to test , the method comprising subjecting antithrombin III to a thermal treatment or an acid treatment ,wherein the thermal treatment and the acid treatment are conducted in the co-presence of a pretreatment agent which contains a divalent metal salt,wherein antithrombin III is a pharmaceutical preparation of antithrombin III or a solution containing antithrombin III at a concentration of 50 Unit/mL or higher than 50 Unit/mL, and{'i': 'limulus', 'wherein a target substance of the test is endotoxin.'}2. The pre-treatment method according to claim 1 , wherein the divalent metal salt is one or more metal salts selected from the group consisting of a divalent metal chloride claim 1 , a divalent metal acetate claim 1 , and a divalent metal sulfate.3. The pre-treatment method according to claim 1 , wherein the divalent metal constituting the divalent metal salt is one or more metals selected from the group consisting of magnesium claim 1 , calcium claim 1 , manganese claim 1 , and zinc.4. The pre-treatment method according to claim 1 , wherein the concentration of the divalent metal ion derived from the divalent metal salt is 0.5 mM or higher when antithrombin III is co-present with the pre-treatment agent.5. The pre-treatment method according to claim 1 , wherein the thermal treatment is performed at a temperature higher than 50° C.6. The pre-treatment method according to claim 1 , wherein the acid employed in the acid treatment is hydrochloric acid.7limulus. A method for measuring endotoxin contained in antithrombin III claim 1 , the method comprising ...

IMPROVED METHODS OF EXTRACTION OF PRODUCTS FROM TITANIUM-BEARING MINERALS

The invention relates to processes for the extraction of products from titanium-bearing minerals. In particular embodiments the invention relates to methods of recycling sulphuric acid used in a titanium dioxide extraction process. The invention also relates to methods for minimising chromophore contamination in calcined titanium dioxide. The process may also comprise steps for removing contaminants from recycled acid or desirable products. 4. The method of any one of the preceding claims wherein recycling comprises collecting excess sulphuric acid from one or more steps of the method and passing recycled sulphuric acid to the sulphuric acid stream.5. The method of any one of the preceding claims wherein the sulphuric acid stream acid has a concentration of greater than 70 m %.6. The method of any one of the preceding claims wherein the sulphuric acid stream has a concentration of about 80 m % to about 98 m %.7. The method of any one of the preceding claims wherein the method comprises a step of minimising water accumulation during the sulphation step a.8. The method of wherein the step of minimising water accumulation comprises heating the sulphated mixture to a sulphation temperature and for a heating period sufficient to remove substantially all of the water produced during sulphation.9. The method of or wherein the step of minimising water accumulation comprises removal of headspace from a sulphation reactor adapted to contain the sulphation step a.10. The method of wherein the removal of headspace is achieved by at least one of:a. a gas pump adapted to increase gas ingress to the headspace of the sulphation reactor; andb. a gas pump adapted to increase gas egress from the headspace of the sulphation reactor.11. A method as claimed in any one of the preceding claims wherein the sulphated mixture is heated to a temperature and for a period to achieve substantially complete sulphation of the titanium oxides present.12. A method as claimed in any one of the ...

METHOD FOR PROCESSING METALLURGICAL WASTE ACID

A method for processing a metallurgical waste acid, includes the following steps. First, a certain amount of a metallurgical waste acid is added into a reaction kettle. Then, the metallurgical waste acid and magnesium slag are added into the reaction kettle in a weight ratio ranging from 5:1 to 15:1 and are stirred into a mixed waste water. The reaction temperature is the room temperature. Then, a certain amount of sulfuric acid is added into the reaction kettle to control the mixed waste water within a pH range. At last, the mixed waste water is filtered. 1. A method for processing a metallurgical waste acid , comprising steps of:providing a metallurgical waste acid comprising arsenic ions, copper ions, and sulfuric acid;providing magnesium slag comprising magnesium, a magnesium compound, and an aluminum compound or at least one chloride;mixing the metallurgical waste acid and the magnesium slag in a reaction kettle into a mixed reactant in a weight ratio ranging from 5:1 to 15:1 to carry out a reaction at a reaction temperature, wherein the magnesium slag is used for adsorbing and precipitating the arsenic ions in the metallurgical waste acid;adding sulfuric acid into the reaction kettle to control the mixed reactant within a pH range, and continuously stirring the mixed reactant for a stirring period to form a mixed product comprising a post-reaction precipitate and a post-reaction waste liquid; andfiltering the mixed product and removing the post-reaction precipitate.2. The method for processing a metallurgical waste acid according to claim 1 , wherein the atomic percentage of magnesium in the magnesium slag is higher than 14 atomic %.3. The method for processing a metallurgical waste acid according to claim 1 , wherein the atomic percentage of magnesium in the magnesium slag ranges from 14 to 91 atomic %.4. The method for processing a metallurgical waste acid according to claim 1 , wherein the arsenic ions are trivalent arsenic ions.5. The method for processing ...

Magnesium Sulfate Granulates Based on Synthetic Magnesium Sulphate

Magnesium sulfate granulates contain at least 90 wt. % synthetic magnesium sulphate hydrate with respect to the total mass of the magnesium sulphate granulate, and have a dry loss of less than 2 wt. % determined by diving of the granulate for 2 hours at 105° C. and 1 bar. Further, a method is used for producing said magnesium sulfate granulates and to their use in urea-containing fertilizer compositions. 1. Magnesium sulfate granules , comprising:at least 90% by weight, based on the total mass of the magnesium sulfate granules, of synthetic magnesium sulfate hydrate and having a drying loss of less than 2% by weight, determined by drying the magnesium sulfate granules at 105° C. and 1 bar for 2 h.2. The magnesium sulfate granules as claimed in claim 1 , having a total magnesium content of at least 26% by weight claim 1 , calculated as MgO and based on the total weight of the magnesium sulfate granules.3.The magnesium Magnesium sulfate granules as claimed in claim 1 , in which a proportion of water-soluble magnesium claim 1 , based on the total mass of the magnesium sulfate granules and calculated as MgO claim 1 , is in the range from 20% to 25% by weight.4. The magnesium sulfate granules as claimed in claim 1 , in which a proportion of water-insoluble magnesium claim 1 , based on the total mass of the magnesium sulfate granules and calculated as MgO claim 1 , is in the range from 1.5% to 7.0% by weight.5. The magnesium sulfate granules as claimed in claim 1 , in which a proportion of water of hydration claim 1 , determined via the ignition loss at 550° C. claim 1 , is in the range from 18% to 22% by weight claim 1 , based on the total mass of the magnesium sulfate granules.6. The magnesium Magnesium sulfate granules as claimed in claim 1 , in which the synthetic magnesium sulfate hydrate is in the form of magnesium sulfate monohydrate to an extent of at least 90% by weight claim 1 , based on a total mass of magnesium sulfate and water of hydration.7. The magnesium ...

PRE-TREATMENT AGENT AND PRE-TREATMENT METHOD FOR ANTITHROMBIN III TO BE SUBJECTED TO LIMULUS TEST

To provide means for reducing reaction interference observed when AT III is subjected to limulus test, whereby the limulus test of antithrombin III can be carried out at high accuracy. Reaction interference observed when AT III is subjected to limulus test can be reduced by subjecting AT III to a protein inactivation treatment in the co-presence of a divalent metal salt. 1. A pre-treatment agent for antithrombin III to be subjected to limulus test ,which agent contains a divalent metal salt, andwhich agent is used for subjecting antithrombin III to a protein inactivation treatment in the co-presence of the pre-treatment agent, before antithrombin III is subjected to limulus test.2. The pre-treatment agent according to claim 1 , wherein the divalent metal salt is one or more metal salts selected from the group consisting of a divalent metal chloride claim 1 , a divalent metal acetate claim 1 , and a divalent metal sulfate.3. The pre-treatment agent according to claim 1 , wherein the divalent metal constituting the divalent metal salt is one or more metals selected from the group consisting of magnesium claim 1 , calcium claim 1 , manganese claim 1 , and zinc.4. The pre-treatment agent according to claim 1 , wherein the concentration of the divalent metal ion derived from the divalent metal salt is 0.5 mM or higher when antithrombin III is co-present with the pre-treatment agent.5. The pre-treatment agent according to claim 1 , wherein a target substance of the limulus test is endotoxin.6. A limulus reagent kit for antithrombin III claim 1 , the kit comprising the pre-treatment agent according to .7. A pre-treatment method for antithrombin III to be subjected to limulus test claim 1 , the method comprising subjecting antithrombin III to a protein inactivation treatment in the co-presence of the pre-treatment agent according to .8. The pre-treatment method according to claim 7 , wherein the protein inactivation treatment is a thermal treatment or an acid treatment.9. ...

APPARATUS AND METHOD FOR PRODUCING MAGNESIUM SULFATE FROM COAL-FIRED BOILER FLUE GAS

The present invention provides an apparatus and a method for producing magnesium sulfate through flue gas desulfurization, and specifically provides an apparatus and a method suitable for producing magnesium sulfate through direct crystallization in a magnesium oxide based desulfurization waste liquid tower of flue gas with a small content of oxygen like a coal fired boiler flue gas. The apparatus includes an oxygenation equipment, a flue gas desulfurization equipment, a seriflux cycling equipment, an evaporation and concentration equipment, a cycling and precipitating equipment, an oxidation equipment, a crystallization equipment, a centrifugation equipment and a drying equipment, etc. The apparatus and method of the present invention can greatly reduce electric power consumption of oxidation fans and steam consumption, as well as guarantee desulfurization efficiency and quality of a magnesium sulfate by-product, reduce lots of operation costs of the magnesium sulfate production system, and reduce desulfurization operation costs. 1. An apparatus for producing magnesium sulfate through flue gas desulfurization , comprising:an oxygenation equipment, configured to increase a content of oxygen in flue gas before the flue gas enters a flue gas desulfurization equipment;a flue gas desulfurization equipment, an interior of which is provided with a sulfur dioxide absorbing and spraying region, configured to remove sulfur dioxide in the flue gas through magnesium oxide based desulfurization, and form absorption seriflux;a seriflux cycling equipment, configured to receive the absorption seriflux from the flue gas desulfurization equipment, further oxidize the absorption seriflux into magnesium sulfate seriflux therein, and then cycle the magnesium sulfate seriflux into the sulfur dioxide absorbing and spraying region and an evaporation and concentration equipment;an oxidation equipment, configured to provide air for the seriflux cycling equipment, so that at least a part of ...

Wastewater treatment process

A wastewater treatment process capable of selectively and efficiently separating and removing a manganese precipitate with high purity from sulfuric acid-acidic wastewater containing aluminum, magnesium, and manganese. In the wastewater treatment for a sulfuric acid-acidic wastewater containing aluminum, magnesium, and manganese, a magnesium oxide is used for part or all of the neutralizing agent to be added, the magnesium oxide is produced through the following steps (1) to (4): (1) effluent wastewater obtained by separating aluminum and manganese from sulfuric acid-acidic wastewater is concentrated, and calcium contained in the effluent wastewater is precipitated as a calcium sulfate; (2) the solution obtained in (1) is further concentrated, and magnesium is precipitated and separated as a magnesium sulfate; (3) the magnesium sulfate separated in (2) is roasted together with a reducing agent to obtain a magnesium oxide and sulfurous acid gas; and (4) the magnesium oxide obtained in (3) is washed.

Methods for the production of potassium sulphate from potassium-containing ores at high ambient temperatures

There are provided methods for the production of potassium sulphate. The methods comprise contacting an aqueous potassium- and sulphate-containing composition with magnesium chloride (MgCl 2 ), thereby obtaining a composition comprising kainite; optionally concentrating the kainite from the composition; reacting the kainite with magnesium sulphate (MgSO 4 ) and potassium sulphate (K 2 SO 4 ) so as to convert the kainite into leonite (K 2 SO 4 .MgSO 4 .4H 2 O); optionally contacting the leonite with water to remove excess MgSO 4 ; and contacting the leonite with water so as to leach the MgSO 4 , contained in the leonite, and to at least substantially selectively precipitate potassium sulphate (K 2 SO 4 ). The method according to the invention can be operated at higher temperatures, in particular at temperatures above 35° C. and does not require a cooling step at 20 to 25° C. The method produces potassium sulphate with a low amount of chloride.

PROCESS AND SYSTEMS FOR REGENERATING ALKALI PROCESS STREAMS

Processes for regenerating alkali process streams are disclosed herein, including streams containing sodium hydroxide, magnesium hydroxide, and combinations thereof. Systems for regenerating alkali process streams are disclosed herein, including streams containing sodium hydroxide, magnesium hydroxide, and combinations thereof. 1. A process comprising:oxidizing a metal sulfide in an oxidizer solution;mixing alkali metal- or alkali earth metal-containing compounds with the oxidizer solution and generating an aqueous sulfate;separating solid oxidized ore from the aqueous sulfate;mixing lime with the aqueous sulfate, thereby forming hydroxide and solid sulfate; andseparating the solid sulfate from the hydroxide.2. The process of claim 1 , further comprising mixing the separated hydroxide with the alkali metal- or alkali earth metal-containing compounds.3. The process of claim 1 , wherein:the alkali metal- or alkali earth metal-containing compound comprises sodium hydroxide, magnesium hydroxide, trisodium hydrogendicarbonate dihydrate, sodium carbonate, sodium bicarbonate, magnesium carbonate, potassium hydroxide, potassium carbonate, potassium bicarbonate, lithium carbonate, lithium bicarbonate, lithium hydroxide, or combinations thereof,the lime comprises quicklime, slaked lime, dolomitic lime, slaked dolomitic lime, or combinations thereof, andthe solid sulfate comprises gypsum.4. The process of claim 1 , further comprising controlling the pH of the oxidizer solution with the alkali metal- or alkali earth metal-containing compound.5. (canceled)6. The process of claim 1 , wherein:the oxidizing is conducted under alkaline conditions at a pH greater than about 8, andthe oxidizing is conducted at about ambient temperature to about 90° C.,mixing lime with the aqueous sulfate comprises mixing a lime slurry with the aqueous sulfate,the hydroxide formed by mixing the lime with the aqueous sulfate comprises aqueous sodium hydroxide, aqueous magnesium hydroxide, solid ...

Filler composition

A filler composition comprising fibrous basic magnesium sulfate particles and non-fibrous inorganic micro-particles having an average particle diameter in the range of 0.001 to 0.5 μm in a ratio by weight in the range of 100:0.001 to 100:50, is used for providing a molded resin product which shows impact resistance and rigidity balanced at a high level.

EXTRACTION OF PRODUCTS FROM TITANIUM-BEARING MINERALS

The invention relates to a process for extracting metals and salts from titanium-bearing minerals such as perovskite. More particularly, although not exclusively, the invention relates to extracting titanium dioxide and optionally other compounds from melter slag derived from an iron-making process. 2. The method of wherein the retentate comprising insoluble residue comprises at least one product selected from calcium sulphate and silica.3. The method of or wherein the step of precipitating aluminium sulphate comprises:a. cooling the permeate from step d. or step g. to produce a cooled liquor comprising precipitated aluminium sulphate; andb. filtering the cooled liquor to produce a retentate comprising precipitated aluminium sulphate, and a permeate.4. The method of wherein the step of precipitating aluminium sulphate comprises cooling the permeate to between 10° C. and 4° C.5. The method of any one of the preceding claims wherein the precipitation of magnesium sulphate comprises the steps of:a. increasing the acid concentration of the permeate comprising magnesium sulphate to form an acidified liquor; andb. filtering the acidified liquor to produce a retentate comprising precipitated magnesium sulphate.6. A method as claimed in wherein the acid concentration of the permeate comprising magnesium sulphate is increased by the addition of sulphuric acid.7. A method as claimed in or wherein the pH of the permeate comprising magnesium sulphate is reduced to less than approximately pH1 by the addition of sulphuric acid.8. A method as claimed in any one of to wherein the acid concentration of the permeate comprising magnesium sulphate is increased by heating the permeate to remove water.9. The method of any one of the preceding claims wherein the particulate material comprises greater than 8 m % titanium dioxide claim 5 , greater than 10 m % aluminium oxide and greater than 10 m % magnesium oxide.10. The method of any one of the preceding claims wherein the particulate ...

Method for treating pickling acid residue

A novel process for treating pickling acid residue and recovering sulfates and nickel therefrom has been developed. By lowering the pH of a magnesium compound slurry to 4-5.5 with sulfuric acid containing pickling acid residue in the presence of ammonium sulfate, both magnesium sulfate and nickel sulfate are solubilized. Magnesium sulfate and nickel sulfate solution is separated from the solids by filtration and an iron hydroxide and chromium hydroxide residue is obtained as a precipitate. Magnesium sulfate and nickel sulfate are then separated from the solution. 1. A method for recovering sulfates and nickel from a sulfuric acid containing pickling acid residue comprising the steps of:slurrying under continuous stirring at least one magnesium compound selected from the group consisting of magnesium oxide, magnesium hydroxide, magnesium carbonate, and combinations thereof into water;adding sulfuric acid containing pickling acid residue (PAR) under continuous stirring to obtain a Mg/PAR-slurry with a stable pH of 4-5.5 at a temperature between 70° C. and 90° C.;{'b': '30', 'continuing continuous stirring of the obtained Mg/PAR-slurry for at least minutes at the temperature between 70° C. and 90° C.;'}adding ammonium sulfate at any stage before filtration of the obtained Mg/PAR-slurry.separating an iron and chromium-containing residue by filtration and obtaining a solution of nickel sulfate and magnesium sulfate as a filtrate; andrecovering sulfates and nickel from the nickel sulfate and magnesium sulfate solution filtrate.2. The method for recovering according to claim 1 , wherein the sulfates are recovered as magnesium sulfate solution by separating the nickel from the nickel sulfate and magnesium sulfate solution filtrate by adsorbing nickel on an ion exchange resin and nickel is recovered as nickel sulfate from the ion exchange resin by elution with sulfuric acid3. The method for recovering according to claim 1 , wherein the magnesium compound is magnesium oxide.4 ...

Magnesium Sulphate

The invention provides a method for the manufacture of a magnesium sulphate product, and a crystalline product, which comprises magnesium sulphate in the form of crystals or granules, as obtainable by carrying out this method. The method comprises the steps of: (a) providing a sulphuric acid product that has been obtained as a by-product during the sulphate process for manufacturing titanium dioxide; (b) concentrating the sulphuric acid product to obtain a concentrated product that has a higher sulphuric acid concentration; (c) combining a magnesium-based neutralising agent with the concentrated product and allowing the magnesium-based neutralising agent and the sulphuric acid to react, to generate magnesium sulphate in solution; and (d) crystallising magnesium sulphate out of the solution, to obtain a crystalline magnesium sulphate product together with a remaining liquor. The magnesium sulphate thus obtained may be mixed with an agriculturally acceptable carrier or diluent and/or with other fertiliser materials to produce a fertiliser. 1. A method for the manufacture of a magnesium sulphate product , the method comprising the steps of:(a) providing a sulphuric acid product that has been obtained as a by-product during the sulphate process for manufacturing titanium dioxide;(b) concentrating the sulphuric acid product to obtain a concentrated product that has a higher sulphuric acid concentration;(c) combining a magnesium-based neutralising agent with the concentrated product and allowing the magnesium-based neutralising agent and the sulphuric acid to react, to generate magnesium sulphate in solution; and(d) crystallising magnesium sulphate out of the solution, to obtain a crystalline magnesium sulphate product together with a remaining liquor.2. The method of claim 1 , wherein the method further comprises the step of:(e) separating the crystallised magnesium sulphate product from the remaining liquor.3. The method of claim 2 , wherein the method further comprises ...

Extraction of products from titanium-bearing minerals

The invention relates to a process for extracting metals and salts from titanium-bearing minerals such as perovskite. More particularly, although not exclusively, the invention relates to extracting titanium dioxide and optionally other compounds from melter slag derived from an iron-making process.

EXTRACTION OF PRODUCTS FROM TITANIUM-BEARING MINERALS

The invention relates to a process for extracting metals and salts from titanium-bearing minerals such as perovskite. More particularly, although not exclusively, the invention relates to extracting titanium dioxide and optionally other compounds from melter slag derived from an iron-making process. 2. The method of wherein the retentate comprising insoluble residue comprises at least one product selected from calcium sulphate and silica.3. The method of wherein the precipitation of aluminium sulphate comprises the steps of:a. cooling the permeate from step d. or step g. to produce a cooled liquor comprising precipitated aluminium sulphate; andb. filtering the cooled liquor to produce a retentate comprising precipitated aluminium sulphate, and a permeate.4. The method of wherein the particulate material comprises greater than 8 m % titanium dioxide and greater than 10 m % aluminium oxide.5. The method of wherein the particulate material comprises greater than 15 m % titanium dioxide and greater than 10 m % aluminium oxide.6. The method of wherein the particulate material comprises a ratio of titanium dioxide to aluminium oxide (TiO:AlO) of approximately 0.2 to 2.6.7. The method of wherein the step of precipitating aluminium sulphate comprises cooling the permeate to between 10° C. and 4° C.8. The method of claim 1 , further comprising a step of precipitating magnesium sulphate from either:a. the permeate produced from the hydrolysis liquor; orb. the permeate produced following aluminium sulphate precipitation.9. The method of wherein the particulate material is selected from the group consisting of iron slag claim 1 , melter slag claim 1 , obtained from iron slag claim 1 , obtained from melter slag claim 1 , obtained from an iron manufacturing process claim 1 , and obtained from a steel manufacturing process.10. The method of wherein the method further comprises the step of grinding raw material to form the particulate material of step a.11. The method of wherein ...

ENHANCED SURFACTANT POLYMER FLOODING PROCESSES FOR OIL RECOVERY IN CARBONATE RESERVOIRS

A composition for use in surfactant polymer flooding processes in a carbonate reservoir, the composition comprising a surfactant, the surfactant operable to reduce interfacial tension, a polymer, the polymer operable to increase the viscosity of the composition, and a tailored water, the tailored water operable to alter a wettability of the in-situ rock, where the tailored water has a total dissolved solids of between 5,000 wt ppm and 7,000 wt ppm, where the total dissolved solids comprises a salt, where the composition has a viscosity between 3 cP and 100 cP. 1. A composition for use in surfactant polymer flooding processes in a carbonate reservoir , the composition comprising:a surfactant, the surfactant operable to reduce interfacial tension;a polymer, the polymer operable to increase a viscosity of the composition; and where the tailored water has a total dissolved solids of between 5,000 wt ppm and 7,000 wt ppm,', 'where the composition has a viscosity between 3 cP and 100 cP.', 'where the total dissolved solids comprises a salt,'}], 'a tailored water, the tailored water operable to alter a wettability of in-situ rock in the carbonate reservoir,'}2. The composition of claim 1 , where the surfactant is selected from the group consisting of betaine-type amphoteric surfactants claim 1 , anionic surfactants claim 1 , cationic surfactants claim 1 , non-ionic surfactants claim 1 , biosurfactants claim 1 , and combinations of the same.3. The composition of claim 1 , where the polymer is selected from the group consisting of polyacrylamides claim 1 , partially hydrolyzed polyacrylamides claim 1 , copolymers of acylamide and acrylate claim 1 , copolymers of acrylamide tertiary butyl sulfonate (ATBS) and acrylamides claim 1 , and copolymers of acrylamide claim 1 , acrylic acid and ATBS.4. The composition of claim 1 , where the surfactant is present at a concentration in a range between 0.05 wt % of the tailored water formulation and 2 wt % of the tailored water ...

Processes for the Production of Citric Acid

The present application pertains to methods for making metal oxides and/or citric acid. In one embodiment, the application pertains to a process for producing calcium oxide, magnesium oxide, or both from a material comprising calcium and magnesium. The process may include reacting a material comprising calcium carbonate and magnesium carbonate. Separating, concentrating, and calcining may lead to the production of oxides such as calcium oxide or magnesium oxide. In other embodiments the application pertains to methods for producing an alkaline-earth oxide and a carboxylic acid from an alkaline earth cation—carboxylic acid anion salt. Such processes may include, for example, reacting an alkaline-earth cation—carboxylic acid anion salt with aqueous sulfur dioxide to produce aqueous alkaline-earth—bisulfite and aqueous carboxylic acid solution. Other useful steps may include desorbing, separating, and/or calcining.

MAGNESIUM SULFATE-BASED DESICCANT AND METHOD FOR PRODUCING SAME

A magnesium sulfate-based desiccant comprising powder composed of coated particles that contain a particle of magnesium sulfate represented by the chemical formula MgSO.nHO (0≤n≤3) and a coating layer on the surface of the particle, wherein: (1) the coating layer contains a coating material that is at least one of carboxylic acids and salts thereof; (2) the powder has an average particle diameter of 5 μm or less; and (3) a contact angle of water relative to the face formed with the powder is 20 degrees or more, and to a method for producing the same. 110-. (canceled)11. A method for producing a magnesium sulfate-based desiccant comprising a step of grinding by a dry method a mixed material containing 1) magnesium sulfate represented by the chemical formula MgSO.nHO (0≤n≤3) and 2) magnesium stearate as a coating material at or above a temperature at which the coating material exhibits plasticity.12. The method according to claim 11 , wherein the grinding is carried out such that the average particle diameter (D50) after grinding is 50% or less of the average particle diameter prior to grinding.13. The method according to claim 11 , wherein the grinding is carried out such that the average particle diameter (D50) after grinding is 30% or less of the average particle diameter prior to grinding. The present invention relates to a novel magnesium sulfate-based desiccant and a method for producing the same.Desiccants such as silica gel, calcium chloride, calcium oxide or zeolite have been conventionally used in order to prevent the quality deterioration of goods due to oxidation and the like resulting from moisture absorption in the fields of food products, pharmaceuticals, electronic components, precision instruments and the like. These desiccants in the form of particles or powder are packaged in paper, nonwoven cloth and the like or enclosed in containers and the like which are then placed in packaging materials with goods.Meanwhile there is a desiccant composition ...

A controlled process for precipitating polymorphs of calcium carbonate

A process for converting gypsum into precipitated calcium carbonate including reacting a mixture comprising gypsum and a seed, a mineral acid, or both with at least one carbonate source, whereby precipitated calcium carbonate is produced in the form of calcite and/or aragonite directly without conversion from a vaterite polymorph. Also, a process for converting gypsum into precipitated calcium carbonate including providing a mixture comprising i) gypsum ii) a seed, a mineral acid, or both iii) at least one additive selected from the group consisting of ammonium sulfate, an organic acid, or an iron material, and reacting the mixture with at least one carbonate source to produce precipitated calcium carbonate in the form of vaterite. The precipitated calcium carbonates having desired and unique composition, polymorph and crystal size characteristics formed by these processes.

PROCESSES AND SYSTEMS FOR REGENERATING ALKALI PROCESS STREAMS

Processes for regenerating alkali process streams are disclosed herein, including streams containing sodium hydroxide, magnesium hydroxide, and combinations thereof. Systems for regenerating alkali process streams are disclosed herein, including streams containing sodium hydroxide, magnesium hydroxide, and combinations thereof. 149-. (canceled)50. A system for generating an alkali process stream , comprising:a first separator configured to separate a supply stream from one or more supply vessels into at least a first stream comprising hydroxide;a carbonate supply configured to supply carbonates;a mixer downstream of the first separator and the carbonate supply, the mixer configured to receive the carbonates and the hydroxide and provide a mixed solution comprising calcium carbonate and sodium hydroxide; anda second separator downstream of the mixer, the second separator configured to (a) remove at least a portion of the calcium carbonate from the mixed solution, (b) recycle at least a portion of the sodium hydroxide to at least one of the one or more supply vessels, or (c) (a) and (b).51. The system of claim 50 , wherein the first separator is configured to separate the supply stream into at least the first stream and a second stream comprising calcium sulfate.52. The system of claim 51 , further comprising a recycle line in fluid communication with the first separator and at least one of the one or more supply vessels claim 51 , wherein at least a portion of the calcium sulfate of the second stream is recycled to the at least one of the one or more supply vessels via the recycle line.53. The system of claim 50 , wherein the second separator is configured to (a) remove at least a portion of the calcium carbonate from the mixed solution claim 50 , and (b) recycle at least a portion of the sodium hydroxide to at least one of the one or more supply vessels.54. The system of claim 50 , wherein the second separator is configured to remove at least a portion of the ...

Boussingaultite production process from liquid effluents containing magnesium sulphate

Describes a method of producing a magnesium sulfate and hydrous ammonia double salt or Boussingaultite ((NH 4 ) 2 SO 4 .MgSO 4 .6H 2 O), using as a source of magnesium a liquid effluent rich in magnesium sulfate originally from hydrometallurgical processes for the production of metals such as nickel, copper, rare earths. According to the invention, the process route for the production of Boussingaultite with physical properties suitable for use in fertilizer mixtures involves the steps of precipitating the Boussingaultite double salt, filtration and thermal drying.

METHOD FOR THE PROCESSING OF POTASSIUM CONTAINING MATERIALS

A method for the processing of potassium containing materials comprises: 1. A method for the processing of potassium containing materials , the method comprising the steps of:(i) Passing a potassium containing material to a first separation step in which a potassium containing mineral is separated from gangue minerals present;(ii) Leaching the potassium containing mineral in acid in a leach step whereby substantially all potassium, iron, aluminium and magnesium present is solubilised and a mixed potassium/iron double salt formed;(iii) Selectively crystallising the mixed potassium/iron double salt formed in the leach of step (ii) in a crystallisation step;(iv) Passing a liquor from the crystallising step (iii) to a second separation step to separate the mixed potassium/iron double salt formed in step (iii);(v) Passing the double salt to a thermal decomposition step to produce an iron oxide, a potassium salt and one or more phosphates;(vi) Leaching the product of the thermal decomposition step;(vii) Passing a leach liquor from step (vi) to a third separation step to separate the iron oxide and phosphates from the potassium salt;(viii) Recovering the potassium salt by crystallisation;(ix) Separating the iron oxide and phosphate of step (vii) by leaching and subsequent solid liquid separation; and(x) Precipitating phosphate from a liquor produced in step (ix) through the addition of a base thereto.2. The method according to claim 1 , wherein the potassium containing mineral comprises one or more of glauconite claim 1 , biotite and/or phlogopite.3. The method according to claim 1 , wherein the iron oxide separated in step (ix) is in the form of one or more of FeO claim 1 , FeOor FeO.4. The method according to claim 1 , wherein the leaching step (ii) is conducted under atmospheric conditions at a temperature close to boiling.5. The method according to claim 1 , wherein the leaching step is carried out with an excess of sulfuric acid allowing for a free acid concentration ...

Resin composition

FIELD: chemistry. SUBSTANCE: invention relates to resin composition, which includes two different magnesium compounds and is excellent on mechanical strength and appearance. Described is a resin composition for making moulded articles, containing (i) 100 pts.wt resin (component A), (ii) plate-like magnesium hydroxide (component B), with thickness of crystal (y) of 0.2 mcm or less, and ratio of width to thickness of 20-100, and (iii) needle-shaped basic magnesium sulphate (component C), where said resin (component A) is at least one resin, selected from a group, consisting of thermoplastic resins, thermosetting resins and rubber, total content of components B and C is 1-100 pts.wt, per 100 pts.wt resin, and weight ratio of component B and component C is 0.1-0.9:0.9-0.1. EFFECT: technical result is creation of a composition based on resin which overcomes defects needle-like basic magnesium sulphate and has good balance between mechanical strength, yield and appearance of moulded article. 6 cl, 3 dwg, 2 tbl, 5 ex РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (51) МПК C08L 101/00 C01F 5/00 C08K 3/12 C08K 3/30 C08K 7/04 (13) 2 603 369 C2 (2006.01) (2006.01) (2006.01) (2006.01) (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ 2014103247/05, 05.04.2013 (24) Дата начала отсчета срока действия патента: 05.04.2013 Приоритет(ы): (30) Конвенционный приоритет: (43) Дата публикации заявки: 10.08.2015 Бюл. № 22 (45) Опубликовано: 27.11.2016 Бюл. № 33 (73) Патентообладатель(и): КИОВА КЕМИКАЛ ИНДАСТРИ КО., ЛТД. (JP), СИ ВОТЕР КЕМИКАЛ ИНСТИТЬЮТ, ИНК. (JP) R U 05.04.2012 JP 2012-086011 (72) Автор(ы): ООХОРИ Кохеи (JP), МАНАБЕ Хитоси (JP), КУДО Дайсуке (JP), МИЯТА Сигео (JP) 2 6 0 3 3 6 9 (56) Список документов, цитированных в отчете о поиске: JP 63-218747 A, 12.09.1998. US 20030235693 A1, 25.12.2003. US 3508869 A1, 28.04.1970. RU 2389688 C2, 20.05.2010. (85) Дата начала рассмотрения заявки PCT на национальной фазе: 30.01.2014 (86) ...

Chemical beneficiation of phosphatic limestone and phosphate rock with α-hydroxysulfonic acids

A method of selectively extracting calcite and dolomite away from apatite in phosphate rock or phosphatic limestone wherein the phosphate rock or phosphatic limestone is treated with a mixture of sulfur dioxide, water, and a carbonyl compound. Solids are separated from the liquid phase. The solids consist principally of apatite admixed with clay, quartz, and other accessory minerals originally in the rock. The solids are heated to drive off adhering sulfur dioxide, water, and carbonyl. The liquid phase consists of carbonyl, water, sulfur dioxide, and magnesium and calcium ions. Heating this liquid preferentially precipitates CaSO 3 .1/2H 2 O. This solid is filtered off and the filtrate further heated to precipitate MgSO 3 .3H 2 O largely free of CaSO 3 .1/2H 2 O. All off gas and filtrate is returned to the process.

Compositions and methods using substances containing carbon

Methods of characterizing and producing compositions with negative δ 13 C values are provided. Aspects of the invention include characterizing source materials and process products. Aspects of the invention also include compositions that contain carbon with negative δ 13 C values.

Method for resource utilization of stone coal acidic wastewater

本发明提供了一种石煤酸性废水资源化利用的方法，所述方法包括重金属回收、富集盐和沉淀黄铁矾、蒸发结晶硫酸镁、结晶镁氮复盐以及尾水循环处理等步骤。本发明所述石煤酸性废水先经过分离回收重金属离子，再通过多步结晶法分别得到黄铁矾、硫酸镁和镁氮复盐，实现废水中不同组分的高效分离回收，避免了传统废水中和脱氨法产生的大量废渣以及有价组分无法回收的问题，得到了多种具有高附加值的产品且产品纯度高、无重金属夹带，废水处理后返回本工艺过程循环使用，从而实现了废水的零排放。本发明所述方法具有成本低、操作简单、清洁环保等优点。

METHOD FOR PRODUCING MAGNESIUM SULPHATE AND IRON OXYGEN PIGMENTS FROM PRODUCTION WASTE

2016113211 А ко РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) (51) МПК СИЕ 5/40 (2006.01) С09С 1/22 (2006.01) С09С 1/24 (2006.01) и. С01С 4902 (2006.01) \ , С01С 49/06 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (11) аа» заза за д (13) Эа 443 24409 Д ВО ша“ (21)(22) Заявка: 2016113211, 06.04.2016 (71) Заявитель(и): Федеральное государственное автономное образовательное учреждение высшего образования "Южно-Уральский Приоритет(ы): (22) Дата подачи заявки: 06.04.2016 (43) Дата публикации заявки: 12.10.2017 Бюл. № 29 государственный университет (национальный исследовательский Адрес для переписки: университет)" (КП), 454080, г Челябинск, пр. им. В.И. Ленина, 76, Костюнин Сергей Владимирович (КО), ЮУРГУ, патентный отдел Добровольский Иван Поликарпович (ВО) (72) Автор(ы): Добровольский Иван Поликарпович (КО), Капкаев Юнер Шамильевич (КО), Бархатов Виктор Иванович (КО), Костюнин Сергей Владимирович (КП), Костюнина Ирина Леонидовна (КП), Абызов Виктор Александрович (КП) (54) СПОСОБ ПОЛУЧЕНИЯ СУЛЬФАТА МАГНИЯ И ЖЕЛЕЗООКИСНЫХ ПИГМЕНТОВ ИЗ ОТХОДОВ ПРОИЗВОДСТВ (57) Формула изобретения 1. Способ получения сульфата магния, включающий взаимодействие тонкодисперсного магнийсодержащего сырья с травильным сернокислым раствором с последующей гидротермальной обработкой полученной суспензии, отделением на фильтр-прессе осадка, который отмывают от водорастворимых соединений и термообработкой осадка в железосодержащий пигмент и кристаллизацию сульфата магния, отличающийся тем, что нейтрализацию травильного сернокислого раствора проводят доломитовой пылью, получаемой прокаливанием доломита при температуре 600...750°С, взятых в соотношении доломитовая пыль: сульфат-ионы в травильном растворе 1:1,2-1,3, при температуре 80...100°С в течение 1,0...1,5 часа до рН, равного 7,0...7,5, продувая суспензию воздухом, кислород которого окисляет железо Ее-+2 в Ее+ 3, а термообработку пигментных паст и кристаллизацию сульфата магния и их измельчение осуществляют одновременно в ...

Method of producing magnesium sulfate

Изобретение относитс  к химической промышленности и предназначено дл  получени  сульфата магни . Цель изобретени  - снижение железа в целевом продукте. С этой цепью в гипсомагнезиальную смесь, полученную осаждением известью из рассолов морского типа, ввод т сернокислое железо, процесс ведут до рН 8,5-9,5, а затем добавл ют карбонат натри . Содержание железа в полученном продукте составл ет 0,008-0,0001 %, 1 з.п. ф-лы, 1 табл. The invention relates to the chemical industry and is intended to produce magnesium sulphate. The purpose of the invention is to reduce iron in the target product. With this chain, iron sulfate is added to the hypomagnesia mixture obtained by precipitation with lime from marine brines, the process is carried out to a pH of 8.5-9.5, and then sodium carbonate is added. The iron content in the resulting product is 0.008-0.0001%, 1C. f-ly, 1 tab.

Manufacturing method of needle-typed magnesium sulfate compound using magnesium oxide

본 발명은, 용매에 MgO 분말을 첨가하여 MgO 용액을 형성하는 단계와, 상기 MgO 용액에 H 2 SO 4 용액을 첨가하여 혼합하는 단계와, 상기 MgO 용액에 H 2 SO 4 용액이 혼합된 혼합용액을 수열반응시키는 단계와, 상기 수열반응에 의해 형성된 침전물을 선택적으로 분리해내는 단계를 포함하며, 상기 혼합용액에서 H 2 SO 4 의 대한 MgO의 몰비(MgO/H 2 SO 4 의 몰비)를 6보다 높게 설정하는 것을 특징으로 하는 침상형 황산마그네슘 화합물의 제조방법에 관한 것이다. 본 발명에 의하면, 산화마그네슘(MgO)을 원료로 사용하면서 황산의 첨가량을 제어하여 SO 4 2- 이온을 제공하고 수열 공정(Hydrothermal reaction)을 통해 침상형 황산마그네슘 화합물을 합성할 수 있다. The present invention comprises the steps of adding MgO powder to a solvent to form an MgO solution, adding and mixing an H 2 SO 4 solution to the MgO solution, and a mixed solution in which the MgO solution is mixed with a H 2 SO 4 solution. hydrothermal reaction, and selectively separating the precipitate formed by the hydrothermal reaction, wherein the molar ratio of MgO to H 2 SO 4 in the mixed solution (MgO/H 2 SO 4 molar ratio) is 6 It relates to a method for producing a needle-shaped magnesium sulfate compound, characterized in that it is set higher. According to the present invention, while using magnesium oxide (MgO) as a raw material, the addition amount of sulfuric acid is controlled to provide SO 4 2- ions, and a needle-shaped magnesium sulfate compound can be synthesized through a hydrothermal reaction.

Method of producing potassium sulfate

A kind of processing system of spent acid containing organic matter and its processing method and purposes

本申请提供了一种含有机物废酸处理系统，所述系统包括反应过滤系统、尾渣处理系统、滤液处理系统和集气装置，滤液处理系统包括：喷淋塔、液体输送装置、喷雾塔、气体净化系统和煅烧系统。所述方法将含有机物废酸与轻烧氧化镁粉加入反应器中进行中和反应，然后得到的溶液进行过滤处理，过滤处理后的滤液先经喷淋塔进行浓缩后再进行干燥，干燥得到的固体经煅烧并冷却后得到无水硫酸镁产品；过滤处理后的滤饼进入尾渣煅烧炉中进行煅烧后，再经冷却得到含硅的尾渣。整个过程中利用轻烧氧化镁粉作为处理硫酸废液的介质，生产出无水硫酸镁产品，实现废液的资源化，是一个典型的环境友好的清洁工艺。

Method of reduction of sulphurous anhydride concentration in flue gases

Изобретение относитс  к технологии снижени  концентрации 50 в дымовых газах печей при сжигании содержащих серу угл  или нефти, позвол ющей упростить процесс за счет : исключени  рециркул ции непрореагировавшего реагента. В печь подают топливо, кислородсодержащий газ и пылевидный реагент, представл ющий собой известн к, доломит или оксид кальци . В печь отдельно от реагента ввод т при распылении воду ;дл  гашени  оксида Са или Mg, присутствующего в газах и образующегос  в печи из карбоната. Из печи вывод т дымовые газы с температурой 50-800°С и продукты нейтрализации SOZ в твердом виде после отделени  их от дымовых газов. Предпочтительно реагент ввод т в избытке по отношению к сере подаваемой в печь с топливом. При отношении Ca/S, равном 4,0, и температуре газов перед подачей воды 800РС снижение концентрации SOg составл ет 12%. 2 з.п. ф-лы, 1 табл. С The invention relates to a technology for reducing the concentration of 50 in the flue gases of furnaces when burning coal-containing sulfur or oil, which simplifies the process by: eliminating the recycling of unreacted reagent. Fuel, oxygen-containing gas and pulverized reagent, which is limestone, dolomite or calcium oxide, are supplied to the furnace. Water is sprayed into the kiln separately from the reagent; to quench the Ca or Mg oxide present in the gases and formed in the carbonate kiln. Flue gases with a temperature of 50-800 ° C and neutralization products of SOZ in solid form are removed from the furnace after they are separated from the flue gases. Preferably, the reagent is introduced in excess with respect to the sulfur fed to the fuel furnace. With a Ca / S ratio of 4.0 and a gas temperature before supplying water of 800PC, the decrease in SOg concentration is 12%. 2 hp f-ly, 1 tab. WITH

Granular fertiliser containing water-soluble forms of nitrogen, magnesium and sulphur and preparation method thereof

FIELD: chemistry. SUBSTANCE: granular fertiliser containing water-soluble forms of nitrogen, magnesium and sulphur contains 18-24 wt % nitrogen, 8-12 wt % sulphur, 3-6% magnesium, expressed as magnesium oxide MgO, in form of boussingaultite - (NH 4 ) 2 SO 4 MgSO 4 ·6H 2 O, and double salts of ammonium nitrate - 2NH 4 NO 3 (NH 4 ) 2 SO 4 and 3NH 4 NO 3 ·(NH 4 ) 2 SO 4 . Magnesite is treated with concentrated nitric acid containing 30-60% HNO 3 to form a reaction mixture containing magnesium nitrate, calcium nitrate and other nitrates according to content of metal compounds in magnesite, and a residue - undecomposed magnesite. The reaction mixture is neutralised with an alkaline reagent to pH 2-6, left to allow reaction with ammonium sulphate at temperature 80-120°C for 20-80 minutes to form a suspension of boussingaultite - (NH 4 ) 2 SO 4 MgSO 4 ·6H 2 O, containing 10-30 wt % water. The suspension is mixed with a recycled product of the previous production in ratio 1:2-1:4 and granulated to form a moist granulate, from which the end product is obtained after removing free water. EFFECT: obtaining fertiliser which is suitable for growing plants on soils with low content of water-soluble magnesium and for plants which require fast delivery of nutrients. 16 cl, 4 ex РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 455 270 (13) C2 (51) МПК C05C 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2009106677/13, 25.07.2007 (24) Дата начала отсчета срока действия патента: 25.07.2007 (43) Дата публикации заявки: 10.09.2010 Бюл. № 25 (56) Список документов, цитированных в отчете о поиске: DE 1018886 В, 07.11.1957. DE 566659 С, 21.12.1932. DE 3320181 A1, 08.12.1983. DE 1010078 B, 13.06.1957. SU 1518329 A1, 30.10.1989. 2 4 5 5 2 7 0 R U (86) Заявка PCT: SK 2007/050017 (25.07.2007) C 2 C 2 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 26.02.2009 (87) Публикация заявки РСТ: WO 2008/013510 (31.01.2008) Адрес ...

The apparatus and method of high purity potassium chloride are extracted from bittern using solar thermal energy

本发明提供了一种利用太阳热能从卤水中提取高纯氯化钾的装置与方法。所述的装置包括一个盐梯度太阳池和一个结晶池，两个池体的底部铺设彼此连通循环的换热管；换热管中部安装储罐和管道泵；结晶池上方设有保温盖板。其工作流程包括结晶池内灌注卤水，待太阳池底部水温升至50‑60℃时启动管道泵驱动换热管内的水持续循环，控制结晶池内的水温为40‑50℃，监测结晶池内卤水的Na + :K + 质量比为1:1.33‑1.66时盖上保温盖板，控制卤水温度降至15‑25℃，陈化6‑24小时后排出结晶池内卤水并收集池底的结晶盐，再经淡水喷淋、脱水干燥后得到高纯氯化钾。本发明的特点在于采用了变温结晶的制盐方式，装置结构简单、工艺方法高效，易于操作和使用。

Method of producing magnesium sulphate from magnesium-containing raw material

FIELD: metallurgy.SUBSTANCE: invention relates to the technology of processing mineral raw materials and is intended for integrated use of metallurgical and mining wastes. Method of producing magnesium sulphate from magnesium-containing material involves preparation of initial material for leaching, leaching magnesium from raw material solution of sulphuric acid while heating with addition of washing water, filtering the obtained pulp with separating the magnesium sulphate solution from the insoluble cake with subsequent purification of the sulphuric acid solution from the impurities by neutralization and filtering the pulp to separate the ferriferous precipitate from the purified magnesium sulphate solution, evaporating and crystallising the purified magnesium sulphate solution, separation of magnesium sulphate crystals by filtration of the mother solution, wherein the magnesium-containing material used is serpentinite or magnesium-containing metallurgical dust, the leaching process is carried out with sulphuric acid with concentration of 300–500 g/l, and the magnesium sulphate solution neutralization is carried out with magnesium hydroxide with concentration of 200–300 g/l and the hydrogen peroxide addition to achieve pH = 7.0–7.5, wherein magnesium is extracted from produced ferruginous residue by means of acid repulping with sulphuric acid and separation of washed iron residue from flushing water, which is directed for leaching initial raw material.EFFECT: technical result is obtaining magnesium sulphate heptahydrate and higher degree of magnesium extraction from initial raw material by optimizing parameters of main operations of method - leaching and purification of pulp from impurities, as well as additional extraction of magnesium from ferriferous sediment.5 cl, 1 dwg, 7 tbl, 4 ex РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 727 382 C1 (51) МПК C01F 5/40 (2006.01) C30B 29/10 (2006.01) C22B 3/08 (2006.01) C22B 3/44 (2006.01) C22B 3/22 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ...

Recycling process for ferric phosphate mother liquor produced by oxidation method

本发明提供一种氧化法生产磷酸铁母液资源化处理的工艺，针对氧化法生产磷酸铁母液含有高浓度硫酸铵、少量金属离子与磷酸的特点，首先采用预处理去除氧化母液中的磷酸根与悬浮物，然后利用膜浓缩系统将出液中的硫酸铵浓缩，产水回用于生产；再利用有机萃取剂萃取浓缩液中金属离子，萃取后的含硫酸铵水相进入蒸发系统离心分离得到硫酸铵，离心母液重新回蒸发结晶系统，含金属有机相加酸反萃，回收硫酸锰和硫酸镁。从而实现氧化法生产磷酸铁母液资源化的目的。本发明提供的氨法氧化法生产磷酸铁母液资源化处理工艺，其生产运行稳定，资源化程度高，资源化产品副价值高，与生产车间最大程度形成闭合链，实现了磷酸铁生产母液资源化。

Method for impellerless flotation of substances and device for its realization

FIELD: impellerless flotation of substances with low degree of hydrophobization and/or insignificant foam bond stability, in particular, salt mixtures. SUBSTANCE: method includes aeration of conditioned pulp with the help of aerating device and formation of aeration pump in the form of vertical free jet enclosed in shell and entering the separating chamber. Pulp is separated into foam and remaining product, and both are withdrawn from separating chamber. Aerated pulp coming from aerating device is diluted with pulp of low density or with carrying liquid. Formation of vertical free jet is made from mixture of aerated pulp and pulp of low density or carrying liquid. The device includes separating chamber, aerating device from which pulp is ejected in the form of free jet. Device is also has at least one vertical guide column open from atop. Aerating device is located under lower end of guide column and coaxial to it. Formed between aerating device and guide column are holes through which low-density pump or carrying liquid is supplied. EFFECT: higher efficiency. 12 cl, 5 dwg осо гс пы ГЭ РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (19) (51) МПК ВИ” 2 103 073 (13) Сл В 030 1/20 12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21), (22) Заявка: 95107406/03, 05.05.1995 (30) Приоритет: 07.05.1994 ОЕ Р 4416261.8 (46) Дата публикации: 27.01.1998 (56) Ссылки: ЗЦ, авторское свидетелтьство, 822904, кл. В 03 О 1/20, 1981. (71) Заявитель: Кали унд Зальц ГмбХ (0Е) (72) Изобретатель: Йост Гетте[ОЕ], Харальд Шнец[ОЕ], Арно Зингевальд[ОЕ] (73) Патентообладатель: Кали унд Зальц ГмбХ (0Е) (54) СПОСОБ БЕЗЫМПЕЛЛЕРНОЙ ФЛОТАЦИИ ВЕЩЕСТВ И УСТРОЙСТВО ДЛЯ ЕГО ОСУЩЕСТВЛЕНИЯ (57) Реферат: Использование: безымпеллерная флотация веществ с незначительной степенью гидрофобизации иДили незначительной устойчивостью в пенной связке, в частности смесей солей. Сущность изобретения: способ включает аэрацию кондиционированной пульпы с помощью аэрирующего приспособления и формирование ...

Integrated seawater resources utilization system

本申请公开一种一体化海水资源综合利用系统，包括预处理系统、第一反渗透系统、机械压缩蒸发浓缩系统及制盐与盐化工系统，预处理系统用于对海水进行预处理，且与第一反渗透系统连通，第一反渗透系统用于对经过预处理的海水实施反渗透处理以得到淡化水及浓盐水；第一反渗透系统具有淡化水输出口和浓盐水输出口，淡化水输出口连接有第一淡化水管道，第一淡化水管道穿过预处理系统，且能与预处理系统内的海水换热；机械压缩蒸发浓缩系统与浓盐水输出口连接，用于浓缩浓盐水，制盐与盐化工系统用于采用浓缩后的浓盐水制备精盐和盐化工产品。上述方案能解决目前海水淡化存在资源利用率低及海水淡化所排放的浓盐水会影响海洋生态的问题。

Method for processing synnyrite

FIELD: chemical industry. SUBSTANCE: invention relates to the chemical processing of high-potassium aluminosilicate synnyrite to produce aluminum oxide, potassium and magnesium sulfates. The processing of synnyrite includes the preparation of raw materials, sintering it with an alkaline earth additive, sulfuric acid leaching, followed by dilution and filtration of the silicon-containing residue with the separation of a solution of sulfates, evaporation of a solution of sulfates and crystallization of alum. After that, the resulting suspension is filtered to obtain a crystalline product and a solution of magnesium sulfate. During sintering, which is carried out at a temperature of 1050-1200°C, magnesium-containing additives are used as an alkaline earth additive for 1-4 hours at a ratio of synnyrite : additive equal to 1:(0.25-1.25). Sulfuric acid leaching is carried out at a concentration of the initial sulfuric acid of 30-50%, at a temperature of 90-100°C, for 30-60 minutes and a ratio of S:L=1: (3-5) with further dilution to S:L=1: (6-8). EFFECT: method makes it possible to isolate aluminum-potassium alum suitable for further production of alumina and/or aluminum-magnesium spinel and potassium magnesia using dolomite, magnesite or brucite as a magnesium-containing additive during sintering with synnyrite, with an increased degree of alum extraction. 4 cl, 1 dwg, 11 tbl, 3 ex РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 753 109 C1 (51) МПК C22B 1/16 (2006.01) C22B 3/08 (2006.01) C01F 5/40 (2006.01) C01F 7/26 (2006.01) C01D 5/02 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК C22B 1/16 (2021.05); C22B 3/08 (2021.05); C01F 5/40 (2021.05); C01F 7/26 (2021.05); C01D 5/02 (2021.05) (21)(22) Заявка: 2020133496, 12.10.2020 (24) Дата начала отсчета срока действия патента: Дата регистрации: 11.08.2021 (45) Опубликовано: 11.08.2021 Бюл. № 23 Адрес для переписки: 197374, Санкт-Петербург, ул. Беговая, 5, корп. 2, кв. 229, ...

Process for producing magnesium compounds and various byproducts using sulfuric acid in HCl recovery loop

本公开的摘要本说明书涉及一种从含镁矿石中提取镁化合物的方法，包括用稀HCl浸提蛇纹石尾矿以溶解镁和其它元素如铁和镍。除去残余二氧化硅，并将富集溶液进一步中和以除去杂质并回收镍。使氯化镁通过与硫酸反应被转化成硫酸镁和盐酸。硫酸镁可通过煅烧被进一步分解为氧化镁和二氧化硫。硫气体可被进一步转化为硫酸。

Wet flue gas desulfurization device

본 발명은 습식배연탈황장치에 관한 것으로서, 간단한 구성이면서도 각별히 낮은 출구미스트농도를 실현할 수 있고, 또한 보수가 용이한 습식배연탈황장치를 제공하는 것을 목적으로 한 것이며, 그 구성에 있어서, 바닥부의 탱크에 흡수제슬러리가 공급되는 흡수탑과, 상기 탱크내의 슬러리를 흡수탑상부의 배연도입부에 보내서 배연과 접촉시키기 위한 순환펌프를 구비하고, 상기 배연도입부로부터 도입한 배연속의 아황상가스를 상기 흡수제슬러리에 의해 흡수제거하고, 상기 탱크끝부분의 상부면쪽으로부터 위로 올라가도록 형성한 배기덕트로부터, 아황산가스가 제거된 처리후 배연을 도출하는 습식배연탈황장치에 있어서, 상기 배기덕트에 있어서의 위로 올라간부분을 세로 칸막도록 미스트분리기를 배설하고, 이 미스트분리기의 하단부를 탱크내의 흡수제슬러리액면내에 연장하여 이루어지는 것을 특징으로 한 것이다.

Comprehensive utilization method of industrial ammonium phosphate sludge

本发明公开了一种工业磷铵淤渣的综合利用方法，属于磷化工技术领域。该方法包括：水洗、酸解、一次降温析晶、脱氟、萃取、反萃和制备复合肥等过程。本专利公开了一条工铵渣中磷、氮、氟、镁等元素综合利用的工艺路线，主要研究了利用酸解、溶剂萃取法将工铵渣中枸溶性磷转化为水溶性磷的方法，该方法可缓解因工铵渣不能完全消化对湿法磷酸生产工业磷酸一铵带来的环保压力，同时也可提高产品的附加值。整个工艺过程中，水洗工段可回收工铵渣中的P 2 O 5 15‑25%，萃取‑反萃取、二元肥工段共可回收工铵渣中的P 2 O 5 70‑75%，P 2 O 5 总回收率85‑95%，F总回收率60‑80%，MgO总回收率30‑50%。

Rotary electrode electrostatic mineral separator - has counter electrode over top, auxiliary electrode at discharge and fluidised bed under each rotary electrode

Method for producing magnesium sulphate and iron-oxide pigments from production wastes

FIELD: chemistry. SUBSTANCE: to produce magnesium sulphate and iron-oxide pigments from productions wastes, the fine-dispersed magnesium-containing raw material is reacted with the sulfuric acid spent etching solution containing iron sulfate. Dolomite dust formed upon calcination of dolomite at the temperature of 600-750°C is used as a magnesium-containing raw material. The ratio of sulfate-ions: dolomite dust in the etching solution is 1:1.1. Hydrothermal treatment of the produced suspension is carried out by blowing the solution with air, the oxygen of which oxidizes iron Fe +2 to Fe +3 . The precipitate is separated on a filter press and washed from water-soluble compounds. Thermal treatment of the precipitate is carried out to the iron-oxide pigment. Drying and grinding of the iron-oxide pigment are carried out simultaneously in a combined spray dryer. The filtrate separated from the filter press and wash water containing magnesium sulfate are fed to the reactor. The content of sulfate ions is increased in the solution to 35-40% by the addition of concentrated sulfuric acid and neutralized with dolomite dust at the temperature of 80-100°C to pH equal to 7.0-7.5. Crystallization of magnesium sulphate is carried out in a crystalliser. EFFECT: invention allows to increase the yield of magnesium sulphate and iron+oxide pigments, to reduce energy consumption during the treatment of the sulfuric acid spent etching solution. 2 cl, 1 dwg, 2 tbl, 3 ex РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 634 017 C2 (51) МПК C01F 5/40 (2006.01) C09C 1/22 (2006.01) C09C 1/24 (2006.01) C01G 49/02 (2006.01) C01G 49/06 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2016113211, 06.04.2016 (24) Дата начала отсчета срока действия патента: 06.04.2016 Дата регистрации: Приоритет(ы): (22) Дата подачи заявки: 06.04.2016 (43) Дата публикации заявки: 12.10.2017 Бюл. № 29 Адрес для переписки: 454080, г.Челябинск, пр. им. В.И. ...

Method for treatment of chromium slag for comprehensive toxicity removal

一种铬渣综合除毒法，是将铬渣加水湿磨成浆， 与稀盐酸反应，并先后使滤液与含钡添加剂，硫酸或 硫酸镁，石灰乳或碳酸钠反应，实现多种元素的综合 提取利用。所用盐酸可以实现循环使用，滤渣可用于 炼铁、制砖。本法可使铬渣彻底永久性地除毒并实现 全渣资源化综合利用。本法采用化工生产通用工艺 设备，易于操作，投资少，治理成本低，具有良好的环 境效益和经济效益。

Preparation and application method of bittern preparation for salt pan capable of improving quality and yield of agricultural products

一种能提高农产品品质和产量的盐田苦卤制剂的制备，取30ºBe’苦卤1000毫升，常压浓缩至沸点达118‑119℃，始沸点110℃，停止加热，由于苦卤中的氯化钠本身是饱和的，浓缩后便结晶析出，加热对氯化钠溶解度影响很小，加上苦卤中的氯化镁浓度大大提高，由于氯离子的影响，使氯化钠进一步析出，得浓缩物；浓缩物冷却至70℃±5℃，趁热抽滤或离心分离得到氯化钠滤饼138克和热滤液，滤液冷却结晶，常温后析出大量六水合硫酸镁结晶MgSO 4 ·6H 2 O，得常温结晶物；对常温结晶物进行离心或抽滤得MgSO 4 ·6H 2 O滤饼225克、滤液——即终母液制剂358毫升35ºBe’，d=1.32、约472克。

Method for producing iron- and manganese-containing pigments from industrial waste

FIELD: chemistry. SUBSTANCE: invention relates to the field of metallurgical and chemical technology of inorganic substances, namely to processing of manganese-containing waste, and can also be used in production of manganese-containing products. The iron- and manganese-containing pigments are produced from industrial waste including manganese-containing compounds, an oxidising agent, a barium-containing compound, wherein blast furnace processing sludge containing manganese, iron and silicon, aluminium, calcium, magnesium, iron and manganese oxides in the amount of 28 to 31% wt. is used as manganese-containing compound, spent sulphuric acid solution containing 2 to 5% H 2 SO 4 and 18 to 20% Fe 2 SO 4 in the amount of 47 to 48% wt. is used as an oxidising agent, technical barium oxide in the amount of 14 to 15% wt. and additionally carryover dolomite dust in the amount of 8 to 9% wt. are used as a barium-containing compound, wherein the waste is processed in two stages, at the first whereof the blast furnace processing sludge is treated with the spent sulphuric acid solution to a pH of 4.0 to 4.5, the resulting suspension is neutralised by adding the carryover dolomite dust to a pH of 7.0 to 7.5, the residue is isolated from the suspension, dried in a combined "fluidised bed" dryer at a temperature of 320 to 340°C with excess oxygen and simultaneously ground to a particle size of 10 to 15 mcm producing a red iron oxide pigment; and at the second stage, the carryover dolomite dust is added to the filtrate isolated from the residue, upon completing the reactions, a manganese-containing residue is isolated from the resulting suspension, mixed with technical barium oxide and transferred to a combined "fluidised bed" dryer, wherein the mixture is heat-treated at a temperature of 500 to 550°C with excess oxygen and simultaneously ground to a particle size of 10 to 15 mcm producing a green pigment. Additionally, excess water is evaporated from the filtrate ...

Method of magnesium sulfate solutions purification from calcium

Использование: на предпри ти х химической , фармацевтической, текстильной, бумажной и кожевенной промышленности. Способ заключаетс  вупаривании раствора сернокислого магни  до плотности 1,35- 1,39 г/см3 охлаждении до 40-45°С, последующем нагревании до 70-80°С и отделении кальцийсодержащего осадка при этой же температуре. Применение способа позвол ет снизить концентрацию кальци  в растворе сульфата магни  с 0,4-0,48 до 0,026-0,031 г/л, что приводит к снижению максимального содержани  кальци  в конечном продукте с 0,016 до 0,0026%. 1 табл.

Method for extracting minerals of high purity from deep ocean water by using low temperature vacuum crystallization

A method for efficiently sorting and extracting minerals from deep ocean water, a mineral extracting method that can improve purity of minerals extracted from the deep ocean water, and a mineral extracting method that can improve yield of the minerals extracted from the deep ocean water are provided. A method for extracting minerals comprises the steps of: desalting deep ocean water to obtain concentrated water including ion components, and fresh water from which the ion components are removed; heating, concentrating and filtering the concentrated water to separate crystals of calcium salt, sodium salt and sulfate; concentrating concentrated water from which the calcium salt, sodium salt and sulfate are removed to obtain a mixed salt slurry of potassium salt and magnesium salt; washing the mixed salt slurry with water to obtain a solution into which magnesium salt is dissolved, and a potassium salt crystal; and concentrating the magnesium salt dissolved solution to obtain a mixed crystal of potassium salt and magnesium salt, and filtering the mixed crystal of potassium salt and magnesium salt to separate a magnesium salt solution with improved purity.

Processing method of magnesium-containing material

FIELD: agriculture. SUBSTANCE: invention relates to the agriculture. Method of processing magnesium-containing feedstock is characterized by the fact that finely ground brucite or brucite dressing wastes are treated with 70–96 % solution of sulphuric acid at room temperature and mixed at ratio between sulphuric acid and magnesium-containing raw material (1–4):1 until complete neutralization of sulphuric acid with subsequent grinding of obtained product. EFFECT: invention widens the range of methods for producing mineral fertilizers. 1 cl, 2 tbl, 1 ex РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 712 737 C1 (51) МПК C05D 5/00 (2006.01) C05G 3/00 (2006.01) C01F 5/40 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК C05D 5/00 (2019.05); C05G 3/00 (2019.05); C01F 5/40 (2019.05) (21)(22) Заявка: 2018144089, 13.12.2018 (24) Дата начала отсчета срока действия патента: (73) Патентообладатель(и): Закрытое акционерное общество "МАГНИЙПРОМ" (RU) Дата регистрации: 30.01.2020 (56) Список документов, цитированных в отчете о поиске: RU 2471756 C1, 10.01.2013. CN 104513098 A, 15.04.2015. CN 101407325 A, 15.04.2009. (45) Опубликовано: 30.01.2020 Бюл. № 4 2 7 1 2 7 3 7 R U (54) Способ переработки магнийсодержащего сырья (57) Реферат: Изобретение относится к сельскому хозяйству. Способ переработки магнийсодержащего сырья характеризуется тем, что тонкомолотый брусит или отходы обогащения брусита обрабатывают 70-96-процентным раствором серной кислоты при комнатной температуре и перемешивают при соотношении между серной кислотой и Стр.: 1 магнийсодержащим сырьем (1-4):1 до полной нейтрализации серной кислоты с последующим измельчением полученного продукта переработки. Изобретение позволяет расширить арсенал способов получения минеральных удобрений. 2 табл., 1 пр. C 1 C 1 Адрес для переписки: 115432, Москва, ул. Трофимова, 8А, кв. 12, Маркину Д.Н. 2 7 1 2 7 3 7 Приоритет(ы): (22) Дата подачи заявки: 13.12.2018 R U 13.12.2018 (72) Автор( ...

Antimicrobial acid formulation

An antimicrobial acid formulation for food and farm applications includes an aqueous solution comprising sulfuric acid present in the aqueous solution in a quantity of from about 1% to about 45% by weight and at least one buffering sulfate salt present in the aqueous solution in a quantity of from about 1% to about 10% by weight.

A kind of molten processing method for adopting liquid of polyhalite

本发明公开了一种杂卤石矿溶采液的处理方法，其将溶采液和生产原卤混合得到原料卤水，所述原料卤水用于生产氯化钠、氯化钾、硫酸镁和/或光卤石；所述溶采液为杂卤石矿经过溶采过程以后得到的卤水。本发明省去新建盐田的环节，直接配合原卤进入生产盐田，进行盐田摊晒，降低了生产成本，减少工艺流程，缩短生产周期，且增加了生产原料的来源，提高了溶采液的利用效率。

Procedure for leaching at presence of hydrochloric acid for regeneration of valuable metal from ore

Изобретение относится к способу выщелачивания ценного металла из руды, содержащей указанный ценный металл. Способ заключается в том, что проводят следующие стадии: выщелачивание руды в присутствии хлористоводородной кислоты с образованием растворимого хлорида металла в растворе для выщелачивания, добавление серной кислоты и/или диоксида серы в раствор для выщелачивания, регенерация твердого сульфата металла или сульфита металла из раствора для выщелачивания и регенерация хлористоводородной кислоты и непрерывное превращение по крайней мере части хлористоводородной кислоты из раствора в парообразную фазу. Затем парообразную хлористоводородную кислоту поглощают и возвращают на стадию выщелачивания. Серную кислоту и/или диоксид серы добавляют в раствор для выщелачивания в процессе выщелачивания или после него. Ценный металл обычно выбирают из группы, включающей Zn, Сu, Ti, Al, Cr, Ni, Co, Mn, Fe, Pb, Na, К, Са, металлы платиновой группы и золото. Металлом в сульфате металла или сульфите металла является ценный металл или менее ценный металл, по сравнению с металлом, который выщелачивают из руды, например магний. Техническим результатом является повышение экономичности процесса. 13 з.п. ф-лы, 27 ил., 1 табл. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 424 332 (13) C2 (51) МПК C22B 3/10 (2006.01) C22B 23/00 (2006.01) C22B 19/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (72) Автор(ы): Йохан Дю-Тойт СТЕЙЛ (ZA), Ян-Терд СМИТ (ZA) (21)(22) Заявка: 2008125977/02, 28.11.2006 (24) Дата начала отсчета срока действия патента: 28.11.2006 R U (73) Патентообладатель(и): АНГЛО ОПЕРЕЙШНС ЛИМИТЕД (ZA) Приоритет(ы): (30) Конвенционный приоритет: 28.11.2005 ZA 2005/09582 (43) Дата публикации заявки: 10.01.2010 Бюл. № 1 2 4 2 4 3 3 2 (45) Опубликовано: 20.07.2011 Бюл. № 20 2 4 2 4 3 3 2 R U (85) Дата начала рассмотрения заявки PCT на национальной фазе: 30.06.2008 C 2 C 2 (56) Список документов, цитированных в ...

A kind of production method of magnesium sulfate monohydrate

本发明公开了一种一水硫酸镁的生产方法，其特征是：搅拌下向1500～2500质量份七水硫酸镁或1800～3000质量份的温度为50～90℃的硫酸镁饱和水溶液中加入1200～3500质量份的质量百分比浓度为90%～98%的浓硫酸，搅拌反应1～2小时，得到一水硫酸镁的悬浮液；将悬浮液过滤，滤饼用硫酸镁饱和水溶液洗涤一次，然后用水洗涤1～2次；将洗涤后的滤饼在120～150℃的温度下干燥0.5～1小时，即制得一水硫酸镁。本发明生产工艺短、设备简单、能耗少、成本低，适合于工业化大生产，商业效果良好，实用性强。

A kind of low-grade magnesite and boron magnesium ore method of comprehensive utilization

一种低品位菱镁矿与硼镁矿综合利用方法，涉及一种镁矿利用方法，所述方法以低品位菱镁矿浮选后的尾矿粉和硫酸为原料，化学反应制备七水硫酸镁，同时，回收并利用二氧化碳；以低品位菱镁矿浮选得到的高品位菱镁矿为原料，煅烧得到轻烧氧化镁粉，同时，回收并利用二氧化碳；以将一部分化学法回收的二氧化碳与溶入氨气的氯化钠溶液，在室温条件下，反应生成碳酸氢钠与氯化铵，生成的氯化铵与轻烧氧化镁粉反应生成氯化镁，氨气蒸发回用；将一部分煅烧法回收的二氧化碳与碳酸氢钠和低品位硼镁矿粉；本发明实现了资源综合利用甚至高效利用，该技术应用带动菱镁产业发展，开辟了菱镁矿加工利用的新篇章，技术应用有广阔前景。

Method of producing potassium salt for fertilizer

Preparing potash fertiliser salts (I) of 60% K2O content and kieserite (II) from impure sylvite (III) of carnallite content 4-20 wt. %, comprises first screening (III) to separate fine fraction (1) of particle size is not >2 mm and a large-size fraction (2). Fraction (2) is then treated by the hot soln. process with a salt soln. (L), satd. with KCl and NaCl at room temp., which contains 90-150 g/l MgCl2. The undissolved residual salts are removed, then the clear hot soln. at 90-100 degrees C allowed to cool so as to crystallise out Cl-contg. (L) sufficient warm water (pref. 3-8%) being added to prevent NaCl crystallising. The mother liquor is evapd. to restore the MgCl2 concn. to that of (L); most is recycled and the remainder discharged. Fraction (1), enriched in carnallite, is conditioned then subjected to electrostatic separation to remove rock salt (IV). The remainder, further enriched in carnallite, can be processed in 3 ways e.g. cold decomposition to a practically carnallite-free crude salt mixt. of sylvite, (II) and residual (IV), plus a conc. MgCl2 soln. which is discharged. (I) esp. suitable for making cpd. fertilisers, is made directly without the need to produce an intermediate prod. of 40% K2O content.

The apparatus and method of magnesium sulfate are produced in flue gas desulfurization

本发明提供一种烟气脱硫生产硫酸镁的装置和方法，具体提供一种氧化镁法脱硫废液塔内直接结晶生产硫酸镁的装置及方法。本发明的装置包括烟气脱硫设备、浆液循环槽、蒸发浓缩区、循环沉降设备、结晶设备、离心设备、干燥设备等。采用本发明的装置及方法，能够解决目前镁法脱硫后废液生产硫酸镁消耗蒸汽较多、吨矿生产成本较高和增加脱硫运行费用较多的问题。

Process to produce magnesium compounds, and various by-products using sulfuric acid in a hcl recovery loop

본 발명은 마그네슘-함유 광석으로부터 마그네슘 화합물을 추출하는 방법에 관한 것으로서, 묽은 HCl로 사문석 선광 부스러기를 침출하여 마그네슘, 및 철 및 니켈과 같은 다른 원소를 용해시키는 것을 포함한다. 잔여 실리카를 제거하고 농축된 용액을 중화시켜 불순물을 제거하고 니켈을 회수한다. 염화 마그네슘은 황산과의 반응에 의해 황산 마그네슘 및 염산에서 변형된다. 상기 황산 마그네슘은 하소에 의해 산화 마그네슘 및 이산화황에서 추가적으로 분해될 수 있다. 황 기체는 추가로 황산으로 전환될 수 있다.

MOBILE ASBESTOS NEUTRALIZATION UNIT

L'unité mobile (200) pour chantiers de désamiantage comporte : - un module (225) de tri de déchets d'amiante, - un broyeur (255) d'amiante et - un bain (250) d'acide chaud pour « inerter » l'amiante. Dans des modes de réalisation : - le bain d'acide chaud comporte de l'acide sulfurique, - l'unité mobile comporte une remorque de véhicule formant support du module de tri, du broyeur et du bain d'acide chaud et - le bain d'acide chaud est contenu dans une cuve calorifugée amovible. The mobile unit (200) for asbestos removal sites comprises: - an asbestos waste sorting module (225), - an asbestos crusher (255) and - a hot acid bath (250) to "inert » asbestos. In embodiments: - the hot acid bath comprises sulfuric acid, - the mobile unit comprises a vehicle trailer forming a support for the sorting module, the crusher and the hot acid bath and - the bath of hot acid is contained in a removable heat-insulated tank.

Process for obtaining sodium chloride and kieserite from the residual sludge separated in the settling apparatus and on the sludge filter

Process for wet scrubbing of sulfur dioxide from flue gas

Abstract of the Disclosure A process for removing sulfur dioxide from flue gas by a wet scrubbing system having a demister unit and wherein addi-tion of a specified amount of magnesium ion to the lime scrubbing slurry is made, with the thickener overflow used as demister water without substantial scaling or solid deposition. A resultant higher efficiency of the scrubber is achieved with fresh water added to the system usable to slake the lime-magnesium slurry used to replenish the scrubbing liquor.

Sepg. sulphur bearing gas from furnace output gas

Method for sepg. gaseous sulphur cpds such as SO2 from furnace exhaust gases, comprises: (a) introducing a powdered alkali metal oxide and/or an alkaline with metal oxide and or a precursor thereof into the furnace as well as the S-contg material, and a gas contg. oxygen, or a solid which releases oxygen on heating is mixed with the gas contg. S leaving the furnace. (b) water or steam is sprayed separately into the furnace and or the exhaust gas to convert the oxide to hydroxide and thus reacts with the SO2; and (c) a solid is sepd. contg. alkali (ne)earth metal sulphate and/or sulphite.

Patent FR2263810A2

METHOD FOR REGENERATING AN EXCHANGE CURE RESIN CHARGED WITH ADSORBED MAGNESIUM IONS

L'INVENTION CONCERNE UN PROCEDE DE REGENERATION D'UNE RESINE ECHANGEUSE DE CATIONS CHARGEE D'IONS MAGNESIUM ADSORBES, ET DE PRECIPITATION DES IONS MAGNESIUM EXTRAITS. IL CONSISTE A ELUER AVEC DE L'ACIDE SULFURIQUE A 20-70 DES QUANTITES SUCCESSIVES 1 A 7 DE RESINE MONTANT DANS UNE COLONNE D'EXTRACTION, LA RESINE REGENEREE ETANT ELIMINEE EN HAUT DE LA COLONNE ET L'ACIDE SULFURIQUE DE CONCENTRATION REDUITE, CONTENANT LE MG ELUE, ETANT ELIMINE AU BAS DE LA COLONNE. LES CONCENTRATIONS DE HSO SONT REGLEES DE FACON QUE LA SOLUTION DE REGENERATION PUISSE ETRE FORMEE A PARTIR DE SOLUTIONS D'ACIDE SULFURIQUE DU COMMERCE SANS DILUTION EXCESSIVE, ET QUE LE MG PUISSE ETRE PRECIPITE DE LA SOLUTION D'ELUTION EN AUGMENTANT LA CONCENTRATION DE HSO SANS AJOUTER UNE FORTE QUANTITE D'ACIDE DU COMMERCE.

PROCESS FOR REGENERATING A CATION EXCHANGE RESIN CHARGED WITH ADSORBED MAGNESIUM IONS

Green recovery treatment method of 1,4-dihydroxy anthraquinone waste sulfuric acid

一种1.4二羟基蒽醌废硫酸的资源化绿色处理方法，步骤如下：1）将1.4二羟基废硫酸浓缩后加入活性炭和氧化剂，搅拌反应后过滤得到活性炭废渣和滤液；2)将滤液加入到搅拌下的氧化镁悬浮液中，搅拌后过滤得到硫酸镁溶液和硼镁硅沉淀物，将所得硫酸镁溶液经冷却结晶、离心、烘干，制得七水硫酸镁；3）将活性炭废渣和硼镁硅沉淀物混合均匀，煅烧后粉碎，制得硼镁硅肥。本发明的优点是：该方法工艺简单、操作简便、易于实施、设备投资少、成本低、无二次污染；该方法使废酸中所有资源都得到了最优化利用，是处理1,4二羟基废硫酸的理想工艺，也适用于其他高有机物的废硫酸处理，经济和社会效益显著。

PROCESS FOR THE SELECTIVE REMOVAL OF CALCIUM FROM cation-exchange resins containing calcium and magnesium di-adsorbates

L'INVENTION CONCERNE UN PROCEDE D'ELIMINATION SELECTIVE DU CALCIUM DE PERLES D'UNE RESINE ECHANGEUSE DE CATIONS CONTENANT DES IONS CALCIUM ET MAGNESIUM ADSORBES. IL CONSISTE A FAIRE PASSER HSO A 20-50, SATURE DE CASO, ET CONTENANT DU MGSO A UNE CONCENTRATION NETTEMENT INFERIEURE A LA SATURATION A TRAVERS UN LIT DE CES PERLES DE RESINE, JUSQU'A CE QUE LE MG ADSORBE SOIT EN EQUILIBRE AVEC LE MG EN SOLUTION, LES IONS H DE LA SOLUTION ETANT ECHANGES CONTRE LES IONS CA ADSORBES, LA SOLUTION DEVENANT SURSATUREE EN CASO, PUIS A FAIRE PASSER LA SOLUTION SURNAGEANTE DANS UN CRISTALLISEUR ET A Y PRECIPITER LE CASO. APPLICATION AU TRAITEMENT DE PURIFICATION DE L'ACIDE PHOSPHORIQUE FABRIQUE A PARTIR DE PHOSPHATES NATURELS. THE INVENTION RELATES TO A PROCESS FOR SELECTIVE REMOVAL OF CALCIUM FROM PEARLS FROM A CATION EXCHANGER RESIN CONTAINING ADSORBED CALCIUM AND MAGNESIUM IONS. IT CONSISTS OF RAISING HSO TO 20-50, SATURATED WITH CASO, AND CONTAINING MGSO AT A SIGNIFICANTLY LOWER CONCENTRATION THROUGH SATURATION THROUGH A BED OF THESE RESIN BEADS, UNTIL THE MG ADSORBES IN EQUILIBRIUM WITH THE MG IN SOLUTION, THE H IONS OF THE SOLUTION BEING EXCHANGED FOR THE ADSORBED CA IONS, THE SOLUTION BECOMING OVERSATURATED IN CASO, THEN PASSING THE SURNAGEANTE SOLUTION THROUGH A CRYSTALLIZER AND PRECIPITATE THE CASO. APPLICATION TO THE PURIFICATION TREATMENT OF PHOSPHORIC ACID MADE FROM NATURAL PHOSPHATES.

Process for obtaining magnesia sulfate

Basic magnesium sulfate granular material and method for producing the same

繊維状塩基性硫酸マグネシウム粒子と、該繊維状塩基性硫酸マグネシウム粒子１００質量部に対して５〜３００質量部の水酸化マグネシウムと、該繊維状塩基性硫酸マグネシウム粒子と該水酸化マグネシウムの合計量１００質量部に対して０．１〜２００質量部の硫酸マグネシウムとを含み、含水率が１０〜６０質量％の範囲にある含水粒状組成物を５０〜２５０℃の範囲の温度で加熱して、乾燥することからなる塩基性硫酸マグネシウム粒状物の製造方法。この方法を利用することによって、底嵩密度でありながらも、圧壊強度が高い塩基性硫酸マグネシウム粒状物を得ることができる。 Fibrous basic magnesium sulfate particles, 5 to 300 parts by mass of magnesium hydroxide with respect to 100 parts by mass of the fibrous basic magnesium sulfate particles, and the total amount of the fibrous basic magnesium sulfate particles and the magnesium hydroxide The water-containing granular composition containing 0.1 to 200 parts by weight of magnesium sulfate with respect to 100 parts by weight and having a water content in the range of 10 to 60% by weight is heated at a temperature in the range of 50 to 250 ° C. The manufacturing method of the basic magnesium sulfate granular material which consists of drying. By utilizing this method, it is possible to obtain basic magnesium sulfate granules having a high crushing strength while having a bottom bulk density.

Manufacturing process for water-poor or water-free sulfates

Method for recovering wet magnesium oxide desulfurization liquid from flue gas

本发明公开了一种烟气湿式氧化镁脱硫液回收方法，包括一个脱硫塔、一个废水缓冲池、一个中和箱、一个反应箱和三个蒸发箱，一个脱硫塔、一个废水缓冲池、一个中和箱、一个反应箱和三个蒸发箱依次通过管道相连通。经过对废水进行氧化、中和、除杂和蒸发浓缩，将废水中的硫酸镁回收加工成一水硫酸镁和七水硫酸镁，由于一水硫酸镁可以用作肥料和矿物质水添加剂，而七水硫酸镁主要用于印染细薄的棉布、丝，作为棉丝的加重剂和木棉制品的填料，医药上用作泻盐，两种生成物都具有良好的利用价值，这样不仅对脱硫后废水进行净化和处理，还生产出有用的化工材料，这样提高烟气湿式氧化镁脱硫液的回收利用率，有助于解决工业废水的问题。

Acidic gaseous effluents - used for mineral extraction esp serpentine

Hydrated magnesium silicates of the serpentine - type are treated in water with a source of acid gas esp. CO2 and SO2, or nitrogen oxides. Metal values e.g. Ni, Mg, Co, Fe and Cr, are dissolved forming a MgHSO3 soln. and fine silica residue. The gases are obtained from industrial effluents and thus reduce pollution problems, also providing sulphite soln. for cellulose extraction from wood and silica for fillers and fine abrasives.

Method for recycling smelting waste acid

本发明提供一种冶炼污酸资源化处理的方法，所述方法先将污酸中的重金属回收，本发明对重金属的回收率达到99％以上；然后用过氧化氢或者氧气将亚砷酸氧化为砷酸，用膜将其中的氢氟酸、盐酸与砷酸、硫酸分离，滤液中硫酸和砷酸的去除率达到99％以上；用氧化镁处理砷酸和硫酸，得到砷酸镁和七水硫酸镁，砷酸镁经过进一步资源化处理，得到砷酸镁玻璃；用氧化镁或氧化钙处理氢氟酸和盐酸，得到氟化镁或氟化钙沉淀、氯化镁或氯化钙，实现氢氟酸、盐酸、亚砷酸和硫酸的完全资源化处理，实现零污染排放，实现资源再利用，避免污染环境。

Method for preparing high density mineral nutrient salt comprising high content sulfate ion

본 발명은 고함량의 황산이온(SO 4 2- )을 포함하는 고농도 미네랄 눈꽃 영양 소금의 제조방법에 관한 것으로서, 보다 구체적으로 해수 농축 단계 및 순간분무 결정화 단계를 통해 농축 해수 상태의 황산이온(SO 4 2- )의 함량을 고함량 수준으로 증가시킬 수 있는 소금의 제조방법에 대한 것이다.

Recovery of kieserite from crude mineral salts

Method of selectively removing calcium from cation exchange resin having adsorbed calcium and magnesium

It is a kind of to carry out magnesium processes circulation desulfurization using flue gas heat source and prepare magnesium sulfate system and method

本发明涉及利用烟气热源进行镁法循环脱硫及制备硫酸镁系统及方法，属于烟气脱硫技术领域。所述系统包括脱硫塔、加热装置、除尘器、冷凝器、浆液池、低压加热器、喷液管、烟气进口、烟气出口、硫酸镁溶液进口、水蒸汽出口；所述除尘器、烟气进口连接，烟气出口与脱硫塔下部连接；硫酸镁溶液进口与脱硫塔的底部连接；加热装置中的水蒸汽出口与冷凝器连接；所述冷凝器、浆液池、喷液管依次相连，喷液管的一端伸入脱硫塔的上部；低压加热器与冷凝器相互连接。本发明采用与烟气换热的方式取代硫酸镁溶液的后续蒸发结晶处理工艺，不仅简化了脱硫副产品的制备工艺，节省了蒸发结晶处理中的能耗，而且实现了余热资源的有效利用，使烟气得到了高附加值利用。

Manufacturing method of fan-shaped magnesium oxysulfate

Method of using high concentration sulfuric acid for stripping and precipitation of adsorbed magnesium

METHOD OF USING HIGH CONCENTRATION SULFURIC ACID FOR STRIPPING AND PRECIPITATION OF ADSORBED MAGNESIUM ABSTRACT Adsorbed magnesium is removed from a cation exchange resin by elution with 20 to 70% sulfuric acid as increments of the loaded resin move upwardly in a stripping column, the regenerated resin being removed at the top of the column and the sulfuric acid of reduced concentration with the eluted magnesium is removed from the lower portion of the column. The sulfuric acid concentrations are controlled so that the regenerating solution can be formed from commercial concentrations of sulfuric acid without undue dilution, and so that the magnesium can be precipitated from the eluting solution by increasing the sulfuric acid concentration without adding a large amount of commercial concentration acid. The amount of dilute sulfuric acid produced as a waste material is kept to a minimum, while the prinicpal sulfuric acid by-product has a usefully high concentration, such as may be employed for treatment of phosphate rock.

Resource utilization method for titanium white waste acid leaching fused salt chlorination slag

本发明公开了一种钛白废酸浸取熔盐氯化渣资源化利用方法，属于环保技术领域。本发明为降低钛白行业废弃物处理成本及难度，实现废弃物的资源化回收，提供了一种钛白废酸浸取熔盐氯化渣资源化利用方法，包括：将熔盐氯化渣与水进行水淬，加入钛白废酸进行溶浸，分离得上清液1；上清液经还原、结晶、分离，得除Fe溶液；调节除Fe溶液pH至5.5～6.0，分离，得上清液2；上清液2经纳滤分离，得含Mg、Mn溶液和含Na溶液，最后再分别回收Mg、Mn、Na。本发明对钛白废酸和熔盐氯化渣进行协同处理，对其中的Sc、Mg、Mn、Ti、Fe等及氯化钠盐分别提取回收，使钛白行业的资源得到高效利用。

Utilization of acid producing gases such as carbon dioxide

Process for the production of potash fertilizer salt with 60% K2 O and kieserite from carnallitic hard salt

Process for producing magnesium and/or nickel by liquid-liquid extraction

Récupération du sulfite de magnésium et/ou du nickel à l'état pur contenus dans une matière de départ solide. Cette dernière est traitée à l'aide de SO₂ gazeux dans l'eau, on soumet la solution obtenue à l'extraction liquide-liquide, à la suite de quoi on obtient une phase aqueuse et une phase organique et l'on récupère le sulfite de magnésium et/ou du nickel de la phase aqueuse. Obtention d'un sel de magné­ sium de grande pureté. Recovery of magnesium sulfite and / or nickel at the pure state contained in a solid starting material. This the latter is treated using SO₂ gas in water, submits the solution obtained to liquid-liquid extraction, to the after which an aqueous phase and a phase are obtained organic and the magnesium sulfite and / or nickel in the aqueous phase. Obtaining a magnesium salt high purity sium.

Extraction of products from titanium-bearing minerals

The invention relates to a process for extracting metals and salts from titanium-bearing minerals such as perovskite. More particularly, although not exclusively, the invention relates to extracting titanium dioxide and optionally other compounds from melter slag derived from an iron-making process.

The method of obtaining acidic magnesium bisulfite solutions

Method of producing concentrated solutions of magnesium sulfate from sea type brine

Использование: на предпри ти х переработки природных рассолов. Способ заключаетс  в концентрировании морской воды или рассола на солнце до плотности 1270 - 1290 кг/м3, отделении выкристаллизовавшегос  хлорида натри  и механиче- скгх примесей, обработке полученной концентрированной рапы годным раствором сульфата аммони  из расчета 25-40 г не 100 мл рассола. Далее после выделени  кристаллов магний-аммонийного шенита смесь перемешивают 5 мин, затем отстаивают 10 мин Кристаллы шенита отдел ют фильтрованием , а к фильтрату прибавл ют равный объем 0,1 М известкового молока. Образовавшуюс  гипс-магнезиальную массу отфильтровывают , Промывают вод -й, смешивают с ранее полученным шенит ,м Полученную влажную пасту перемешип от с одновременным удалением аммиак под пониженным давлением Через 2 - 2,5 ч реакционную смесь обрабатывают гор чей водой и фильтруют, получа  концентрированный раствор сульфата магни . 1 табл. (Л

Method of sulphur dioxide removal from fue gases

Apparatus and method for producing magnesium sulfate through flue gas desulfurization

Process for continuous production of fibrous basic magnesium sulfate particle

本发明公开可连续地制备纤维状碱性硫酸镁粒子的方法,包含下述工序的制备方法：(1)将水性介质中分散有纤维状碱性硫酸镁种粒子的种粒子水性分散液准备于反应容器内的工序；(2)在搅拌下一边加热上述种粒子水性分散液，一边向反应容器连续地供给氢氧化镁与硫酸镁，从而使在水的存在下的硫酸镁与氢氧化镁的反应生成的碱性硫酸镁析出于前述纤维状碱性硫酸镁种粒子的表面，而得到由此被增量的纤维状碱性硫酸镁粒子的水性分散液的工序；(3)将上述(2)的工序中所得水性分散液从反应容器连续地取出的工序；并且(4)从自反应容器取出的水性分散液回收纤维状碱性硫酸镁粒子的工序。

Method for producing alkaline earth sulphate nanoparticles

The invention relates to synthesis of nanoparticles, in particular to method s for producing nanoparticles with a networks consisting of Z sulphate (Z = magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba) or the binary mixtures thereof). The inventive method consists in synthesising the nanoparticles by crystal growth from an ion Z source and a sulphate ion sour ce in a synthesis liquid phase mixture. The aim of said invention is to produce in a simple way barium sulphate nanoparticles having a small diameter, said particles being uniformly dispersed in water or other solvents. For this purpose, co-ordinating solvents like glycerine, glycol ethylene and other polyethylene glycols, polyalcohols or dimethylsulphoxide (DMSO) are used for the synthesis mixture. In the preferred embodiment, barium is used in the fo rm of chloride and the sulphate source in the form of tetrabutylammonium hydrog en sulphate. Other metallic dopants can be eventually integrated in the nanoparticles network. When the synthesis is also used in the form of chlori de.

PROCESS TO PRODUCE MAGNESIUM COMPOUNDS AND VARIOUS BY-PRODUCTS USING SULFURIC ACID IN A HCl RECOVERY LOOP

The present invention relates to a process for extracting magnesium compounds from magnesium-bearing ores comprising leaching serpentine tailing with dilute HCl to dissolve the magnesium and other elements like iron and nickel. The resudial silica is removed and the rich solution is further neutralized to eliminate impurities and recover nickel. Magnesium chloride is transformed in magnesium sulfate and hydrochloric acid by reaction with sulfuric acid. The magnesium sulfate can be further decomposed in magnesium oxyde and sulphur dioxyde by calcination. The sulphur gas can further be converted into sulfuric acid.

Process and apparatus for non-agitated flotation of substances with a low degree of hydrophoby and/or low stability in the foam structure, in particular of salt mixtures

A process and apparatus for pneumatic flotation include thinning a conditioned and gassified pulp and then forming them in the separation chamber into an enclosed free jet.

Process and device for non-agitated flotation of substances with a low degree of hydrophoby and/or low stability in the foam structure, in particular of salt mixtures

A process and device for pneumatic flotation are described wherein the conditioned and gassed pulp is thinned and formed in the separation chamber into an enclosed free jet.

Manufacturing method of basic magnesium sulfate compound

본 발명은, 황산마그네슘(MgSO 4 ·7H 2 O), 산화마그네슘(MgO) 및 용매를 혼합하는 단계와, 상기 황산마그네슘, 상기 산화마그네슘 및 상기 용매의 혼합물을 리플럭스 시키면서 상기 황산마그네슘과 상기 산화마그네슘을 반응시키는 단계와, 원심분리기 또는 필터기를 이용하여 반응된 결과물로부터 침전물을 얻는 단계 및 상기 침전물을 건조하여 침상형의 염기성 황산마그네슘 화합물(5Mg(OH) 2 ·MgSO 4 ·3H 2 O)을 수득하는 단계를 포함하는 염기성 황산마그네슘 화합물의 제조방법에 관한 것이다. 본 발명에 의하면, 상압에서 리플럭스(reflux) 방법을 이용함으로써 수열반응기로 합성하는 방법보다 저가의 단순한 공정을 통해 침상형의 염기성 황산마그네슘 화합물을 제조할 수 있다. The present invention relates to a method for producing magnesium sulfate, which comprises mixing magnesium sulfate (MgSO 4 .7H 2 O), magnesium oxide (MgO) and a solvent, reflowing a mixture of magnesium sulfate, Magnesium sulfate, and a precipitate obtained from the reaction product by using a centrifugal separator or a filter unit. The precipitate is dried to obtain a needle-like basic magnesium sulfate compound (5Mg (OH) 2 .MgSO 4 .3H 2 O) To obtain a basic magnesium sulfate compound. According to the present invention, it is possible to produce an acicular basic magnesium sulfate compound through a simple process at a lower cost than a method of synthesizing in a hydrothermal reactor by using a reflux method at normal pressure.

Patent FR2263810B2

Process for continuous production of fibrous basic magnesium sulfate particle

Fibrous basic magnesium sulfate particles are continuously produced by the process comprising the following steps: (1) placing in a reaction vessel a seed particle-containing aqueous dispersion comprising fibrous basic magnesium sulfate seed particles dispersed in an aqueous medium; (2) supplying magnesium hydroxide and magnesium sulfate continuously into the reaction vessel under heating and stirring the seed particle-containing aqueous dispersion, whereby depositing basic magnesium sulfate produced by the reaction between the magnesium sulfate and magnesium hydroxide in the presence of water on the surfaces of the fibrous basic magnesium sulfate seed particles, to give an aqueous dispersion containing an increased amount of fibrous basic magnesium sulfate particles; (3) taking the aqueous dispersion obtained in the step (2) continuously out of the reaction vessel; and (4) recovering fibrous basic magnesium sulfate particles from the aqueous dispersion taken out of the reaction vessel.

Energy from bacteria and seabed extraction

A method of generating hydrogen gas includes providing a colony of sulfur-reducing bacteria and a colony of sulfur-oxidizing bacteria. The colonies can be submerged in a body of water. The colony of sulfur-reducing bacteria can be used to convert at least a portion of sulfates present in the body of water to hydrogen sulfide. The colony of sulfur-oxidizing bacteria can be used to convert the hydrogen sulfide to sulfuric acid. The sulfuric acid can react with manganese to produce hydrogen gas and manganese sulfate.

Patent JPS6110177B2

Method and apparatus for the preparation of a magnesium compound from a thickened magnesium bisulfite lye