Method for producing recombined pigskin using leftover material of broken pigskin

The invention relates to a method for producing recombinant pigskin by using broken pigskin leftover materials, which comprises the following steps: (1) material selection; (2) acidolysis; (3) boiling; (4) filtering; (5) salination; (6) neutralization; (7) blending; (8) enzyme catalysis; (9) pouring and forming; and (10) air curing. The method uses broken pigskins including the broken pigskins produced through division processing, scourged pigskins, gore pigskins and the like as raw materials to produce the entire pigskin, and adopts a glutamine transaminage preparation to perform biocatalysis on the entire reaction system so as to achieve the recombination of the broken pigskins. Using the glutamine transaminage preparation to process the broken pigskins for recombination and forming, the recombinant pigskin cannot be re-dispersed due to freezing, slicing, stewing, cooking and the like. The method recombines the pigskins for reuse, which not only revalues the pigskins, but also reduces ...

Method for preparing magnetic high molecular micro ball of amino polyacrylamide

The present invention discloses the rpeparation process of magnetic microball with super-paramagnetic fluid kernel and amino polyacrylamide coating. The technological process includes magnetic fluid preparation, primer adsorption, reactor monomer dispersion and polymerization, magnetic separation and washing of magnetic microball. The microball has good suspension property, high magnetic responsivity and homogeneous particle size, and may be used as carrier for various enzyme, antibody, and target medicine in cell separation, immunological analysis, gene engineering, wine making fermentation and other fields.

Composite cross-linking pole support bentonite intercalation desulfurizer and preparation method thereof

The present invention provides one kind of composite cross-linked organic pillared interlayer bentonite desulfurizer and its preparation process. The preparation process includes the following steps: compounding sodium bentonite slurry, adding ZnCl2 solution, ion exchanging for 12 hr and regulating pH to 6.0; dropping the mixed slurry into Keggin solution to prepare organic pillared bentonite; dropping organic intercalating agent in the amount of 0.6 CEC sodium bentonite into the composite cross-linked pillared bentonite suspension at 75 deg.c, stirring for 2 hr, centrifugally cleaning, drying at room temperature, grinding to 200 mesh to obtain organic-inorganic composite cross-linked pillared interlayer bentonite; heating the mixed solution of Zn(NO3)2, Cu(NO3)2 and Mn(NO3)2 in a water bath, adding the modified bentonite and magnetite and dropping Na2CO3 precipitant; cooling to room temperature, vacuum suction filtering, stoving and grinding to obtain the desulfurizer.

Method for preparing aluminum-gadolinium-samarium alloy by fused salt electrolysis

The invention relates to a method for preparing an aluminum-gadolinium-samarium alloy by fused salt electrolysis, which comprises the following steps: using AlF3+NaCl+KCl as a fused salt electrolyte system, wherein the percentage by mass of the AlF3 is 10-12%, the percentage by mass of the NaCl is 36-40%, and the percentage by mass of the KCl is 47-50%; adding anhydrous Sm2O3 and Gd2O3 mixed powder according to 10-20% of the mass of the AlF3; porphyrizing in a mortar, and uniformly mixing; using inert metal molybdenum as the cathode and graphite as the anode to carry out electrolysis, wherein the electrolysis temperature is 640-840 DEG C, a submerged cathode process is adopted, the anode-cathode distance is 4 cm, the cathode current density is 3.1-9.3 A/cm<2>, the anode current density is 0.5 A/cm<2>, the tank voltage is 3.9-5.1 V, and the electrolysis time is 1.8-3 hours; and finally, depositing the Al-Gd-Sm ternary alloy in the vicinity of the cathode of the fused salt electrolysis tank ...

Method for forming brown ceramic membrane on surface of Mg-Li alloy

The invention provides a method for forming a brown ceramic membrane on the surface of an Mg-Li alloy, which comprises: (1) the Mg-Li alloy is polished by SiC abrasive paper, is processed by the operation of cleaning and blow-drying by cold air and then is put into a dryer for standby application; (2) the Mg-Li alloy is used as an anode, a stainless steel electrolytic tank is used as a cathode, the pretreated Mg-Li alloy is steeped in electrolytic solution, and the mode of DC impulsing power source output is used for the micro arc oxidation of the Mg-Li alloy; and finally, the Mg-Li alloy is taken out, and is processed by the operations of cleaning by distilled water and blow-drying by cold air. The antirot ceramic membrane which is formed on the Mg-Li alloy by the processing of the invention is mainly prepared by MgO, MgSiO3, Mg2SiO4, MoO3 and MgMoO4, and the thickness ranges from 10 to 70mum. The method has the advantages of high efficiency, low cost, slight pollution to environment, ...

Preparation method for anion pillared hydrotalcite

The invention provides a method for preparing anion column support houghite, which comprises the steps of weighing M(II)(NO3)2*6H2O and M(III)(NO3)3*9H2O to prepare a nitrate aqueous solution; weighing NaOH and Na2CO3 to prepare a solution; adding the alkali solution and the salt solution into a three-necked bottle simultaneously, drop by drop and at a uniform speed till the pH value is 11.0 plusor minus 0.5; quickly transferring the mixed serous fluid into a high-pressure reactor through supercritical fluid; controlling the temperature and the pressure conditions to reach a supercritical state at constant temperature and pressure; releasing the supercritical fluid within 10 to 60s, communicating with the atmosphere and obtaining the mesoporous houghite compound; and baking the houghite toform the mesoporous oxide with the aperture of 5 to 15nm. The method introduces the supercritical fluid technology into the hydrothermal synthesis method, effectively prevents the formation of absorp tion ...

Method for forming brown ceramic membrane on surface of Mg-Li alloy

The invention provides a method for forming a brown ceramic membrane on the surface of an Mg-Li alloy, which comprises: (1) the Mg-Li alloy is polished by SiC abrasive paper, is processed by the operation of cleaning and blow-drying by cold air and then is put into a dryer for standby application; (2) the Mg-Li alloy is used as an anode, a stainless steel electrolytic tank is used as a cathode, the pretreated Mg-Li alloy is steeped in electrolytic solution, and the mode of DC impulsing power source output is used for the micro arc oxidation of the Mg-Li alloy; and finally, the Mg-Li alloy is taken out, and is processed by the operations of cleaning by distilled water and blow-drying by cold air. The antirot ceramic membrane which is formed on the Mg-Li alloy by the processing of the invention is mainly prepared by MgO, MgSiO3, Mg2SiO4, MoO3 and MgMoO4, and the thickness ranges from 10 to 70mum. The method has the advantages of high efficiency, low cost, slight pollution to environment,and ...

Gene chip for detecting various prawn pathogenes and detection method thereof

The invention relates to a gene chip for detecting various prawn pathogenes and a detection method thereof. The gene chip is prepared by arranging the probes of a quality control system and the probe points of 18 types of prawn pathogenes on the same solid-phase carrier nylon membrane. The probes of 18 types of the prawn pathogenes comprise probes for detecting 15 types of viruses, probes for detecting fusarium, fish-killing aphanomyces and deformation algal filament cristatum, and probes for detecting Paranophrys and prawn rickettsia. When the gene chip is used for detection, a signal is judged according to the condition whether blue or royal purple appears at a hybridization point by using a digoxin hybridization chromogenic method. The construction of the quality control system on the gene chip ensures the detection specificity and sensitivity, thus, the gene chip can be used for simultaneously detecting various prawn pathogenic microorganisms on the same nylon membrane, has the characteristic ...

Rose-shaped nano zinc oxide preparation method

The invention provides rosette nanometer zinc oxide and a preparation method thereof. Zn(NO3) question mark 6H2O is added into absolute ethyl alcohol solution to obtain reaction mixture; then the reaction mixture is injected into a high pressure reaction kettle with an inside lining polyfluortetraethylene liner and sealed; the reaction kettle which has reaction mixture is heated to 180 DEG C, andthe temperature is kept for 2 to 10 hours; after the kettle is naturally cooled to room temperature, the obtained products are centrifugalized and washed with deionized water, and then put into a vacuum drying cabinet for drying for 12 hours at the temperature of 25 DEG C; finally the rosette nanometer zinc oxide is obtained. The invention adopts more accessible absolute ethyl alcohol with nontoxic and low price as revulsant which simultaneously plays the function of scattering so as to reduce agglomeration. The single and uniform rosette nanometer zinc oxide is obtained by the method, which adds ...

Plasma electrolytic oxidation method for Mg-Li alloy

The invention provides a plasma electrolytic oxidation method for Mg-Li alloy. The method is characterized in that Mg-Li alloy undergoes treatment and plasma electrolytic oxidation in turn; the compositions of an electrolyte are 10 to 50 g/L silicate, 3 to 20 g/L sodium aluminate, 1 to 10 g/L sodium hydroxide and 10 to 50mL/L triethanolamine; moreover, distilled water is added into the electrolyte till the volume reaches to 1L, and the pH value of the solution is adjusted to between 12 and 14; the prepared electrolyte is poured into a stainless steel cell used as a cathode; an alloy sample istaken as an anode; a DC pulse power source output mode is adopted to carry out plasma electrolytic oxidation treatment to Mg-Li alloy; and finally, the Mg-Li alloy is taken out and cleaned by the distilled water and then is blown dry by cold wind. The surface of a plasma electrolytic oxidation ceramic membrane prepared by the method has ceramic appearance and is firmly combined with a matrix; moreover ...

Synthesizing method of high-purity 3-methyl-N-[4-(trifluoromethyl) phenyl]-4-isoxazol formamide

The invention relates to a synthesizing method of high-purity 3-methyl-N-[4-(trifluoromethyl) phenyl]-4-isoxazol formamide. The method can enhance the yield of 3-methyl-N-[4-(trifluoromethyl) phenyl]-4-isoxazol formamide greatly, and the product is easy to purify. Therefore, the method is beneficial to preparing the high-purity 3-methyl-N-[4-(trifluoromethyl) phenyl]-4-isoxazol formamide.

Preparation method and application of tobacco polysaccharide sulfate

The invention belongs to the technical field of tobacco extracts, and particularly relates to a preparation method and application of tobacco polysaccharide sulfate. The preparation method mainly comprises the following steps: extracting tobacco polysaccharide and performing esterified modifying on the tobacco polysaccharide by sulfuric acid. The optimal sulfuric acid modification method is determined according to the monosaccharide constitution type of the tobacco polysaccharide, an optimal reaction condition and an optimal process for the sulfuric acid modification of the tobacco polysaccharide are determined by virtue of a series of experimental verification, the tobacco polysaccharide modified by the sulfuric acid is determined to be suitable for being used as a novel antioxidant by further determining the antioxidant activity of the tobacco polysaccharide modified by the sulfuric acid, so that a novel way is provided for the diversified utilization of tobacco.

Slow-release medicine intercalation magnetic hydrotalcite with fluorescence radiation performance and preparation method thereof

The invention provides a sustained-release drug intercalation magnetic houghite which has the fluorescence lighting performance, and a preparation method. A salt liquid is prepared by the mixture of a magnetic stroma, bivalent metal salt and trivalent metal salt; a lye prepared by NaOH and Na2CO3 is prepared into CO3-LDH/Fe3O4; the dried CO3-LDH/Fe3O4 is baked for 2h at the temperature of 450 DEG C to form a double-metal oxide; under the protection of N2, the double-metal oxide obtained by baking is put in a container filled with an amoxicillin sodium lye; finally the mixture is put into a constant temperature oscillator to be oscillated for 24h at the speed of 180r/min, then filtered, washed and dried to obtain the sustained-release drug intercalation magnetic houghite which has the fluorescence lighting performance and has a chemical formula: [M(II)<1-x>M(III)(1-Beta)xM'(III)Betax(OH)2](AMX<->)a(A)b question mark mH2O/Fe3O4. The invention has the advantages of removing the inorganic ...

Preparation method of 7(S)-Boc-amino-5-azaspiro [2,4] heptane

The invention relates to a preparation method of 7(S)-Boc-amino-5-azaspiro [2, 4] heptane which is an intermediate of broad-spectrum medicine sitafloxacin. The preparation method enables the reaction to be more easily controlled, and the optical purity of an obtained chiral isomer is higher.

Multi-character breeding value determination method, device and equipment and storage medium

The invention discloses a multi-character breeding value measuring method, device and equipment and a storage medium, multi-character breeding parameters are obtained, the multi-character breeding parameters comprise phenotype file parameters, pedigree file parameters and genome file parameters corresponding to various shapes, the Kronecker theorem is utilized, and according to a preset equivalence model of a BLUP algorithm, the multi-character breeding value is measured. Decomposing the multi-trait breeding parameters to extract a Kronecker component corresponding to each trait so as to decompose a multi-trait determination process into a plurality of single-trait determination processes, thereby reducing the memory consumption in the multi-trait determination process; the method comprises the following steps: acquiring a plurality of Kronecker components, performing single-character measurement on each Kronecker component to obtain a first breeding value corresponding to each Kronecker ...

Method for preparing magnetic high molecular micro ball of amino polyacrylamide

Rail type gantry crane transfer process

The invention relates to a transfer process for a rail-mounted gantry crane. The transfer process comprises the following steps: step 1, barge berthing, step 2, barge rail laying, step 3, ship loading rail laying, step 4, ship unloading rail laying, step 5, ship loading traction, step 6, complete machine binding, step 7, complete machine transfer and step 8, ship unloading traction. The crane moving rails are laid on the wharf and the barge, the module vehicle and the jacking beam are used for driving the crane to move to the barge from the wharf along the rails, and the barge drives the crane to move to the target position on the wharf. And then the module vehicle and the jacking beam are used for driving the crane to move to the target position on the wharf from the barge along the track, so that the whole crane is transferred, the disassembly and assembly processes are omitted, the operation is simple, the transfer efficiency is high, and the cost is low.

Novel environment-friendly process for preparing leflunomide

The invention relates to a novel environment-friendly process for preparing leflunomide, which can better control the content of 3-methylisomer and 4-trifluoromethylaniline in the leflunomide, has higher yield and is simpler. The process generates little industrial effluent and exhaust gas, is more environment-friendly and can effectively reduce production cost and corrosion to equipment.

Surface treating method for magnesium lithium alloy

The invention provides a method for processing the surface of magnesium-lithium alloy. The technique of micro-arc oxidation is successfully applied to processing the surface of the magnesium-lithium alloy. Direct current/ DC pulse/alternating current pulse multiplex power supply is used and the magnesium-lithium alloy with different lithium contents in a compound electrolyte system of sodium polyphosphate, sodium silicate, calgon and sodium hydroxide is carried out by micro-arc oxidation for 2-120min. A ceramic oxide film of 10-100Mum with a rigidity higher than 200Hv is formed in situ on thesurface of the magnesium-lithium alloy, thus remarkably improving corrosion resistant property compared with an alloy matrix, solving the problem known at home and abroad concerning processing the surface of the magnesium-lithium alloy and broadening the application in the fields of aviation, aerospace, car, electronic, etc.

Boar phenotype detection method, device, storage device and system

The invention discloses a boar phenotype detection method, device, storage medium and system, and the method comprises the steps: reading the electronic ear tag information of a to-be-detected pig, employing a preset visual system to automatically shoot the to-be-detected pig, and carrying out the phenotype information calculation according to a plurality of shot images, thereby obtaining the phenotype information of the to-be-detected pig, and achieving the detection of the phenotype of the to-be-detected pig. According to the boar phenotype detection method, device, storage medium and system, the accuracy and convenience of boar phenotype detection are improved.

Method for directly preparing Mg-Zr alloy by MgCl2, K2ZrF6 and ZrO2 electrolysis

The invention provides a method for directly preparing Mg-Zr alloy by electrolyzing MgCl2, K2ZrF6 and ZrO2.KCl and K2ZrF6 are dried under 600 DEG C, and anhydrous MgCl2 and KF are dried at 130 DEG C under the vacuum condition; KCl, K2ZrF6, anhydrous MgCl2, KF and ZrO2 are ground and mixed evenly in the ratio of 35 percent to 45 percent:5.3 percent to 15 percent:35 percent to 45 percent:0.1 percent to 4.5 percent:2 percent to 4 percent, and then heated and melted in an electrobath; a metal molybdenum wire is taken as the cathode, a cathode product collecting sleeve is arranged on the cathode, a graphite rod is taken as the anode, the electrobath temperature is between 650 DEG C and 800 DEG C, the cathode current density is 6A/cm<2> to 13A/cm<2> and the electrobath voltage is 5V to 9V; the temperature is preserved for 10min to 40min after one hour of electrolysis, and the Mg-Zr alloy is deposited near the cathode in the molten salt electrobath; the whole process is carried out under the protection ...

Plasma electrolytic oxidation method for Mg-Li alloy

The invention provides a plasma electrolytic oxidation method for Mg-Li alloy. The method is characterized in that Mg-Li alloy undergoes treatment and plasma electrolytic oxidation in turn; the compositions of an electrolyte are 10 to 50 g/L silicate, 3 to 20 g/L sodium aluminate, 1 to 10 g/L sodium hydroxide and 10 to 50mL/L triethanolamine; moreover, distilled water is added into the electrolyte till the volume reaches to 1L, and the pH value of the solution is adjusted to between 12 and 14; the prepared electrolyte is poured into a stainless steel cell used as a cathode; an alloy sample is taken as an anode; a DC pulse power source output mode is adopted to carry out plasma electrolytic oxidation treatment to Mg-Li alloy; and finally, the Mg-Li alloy is taken out and cleaned by the distilled water and then is blown dry by cold wind. The surface of a plasma electrolytic oxidation ceramic membrane prepared by the method has ceramic appearance and is firmly combined with a matrix; moreover ...

Method for directly preparing Mg-Zr alloy by MgCl2, K2ZrF6 and ZrO2 electrolysis

The invention provides a method for directly preparing Mg-Zr alloy by electrolyzing MgCl2, K2ZrF6 and ZrO2. KCl and K2ZrF6 are dried under 600 DEG C, and anhydrous MgCl2 and KF are dried at 130 DEG C under the vacuum condition; KCl, K2ZrF6, anhydrous MgCl2, KF and ZrO2 are ground and mixed evenly in the ratio of 35 percent to 45 percent : 5.3 percent to 15 percent:35 percent to 45 percent:0.1 percent to 4.5 percent:2 percent to 4 percent, and then heated and melted in an electrobath; a metal molybdenum wire is taken as the cathode, a cathode product collecting sleeve is arranged on the cathode, a graphite rod is taken as the anode, the electrobath temperature is between 650 DEG C and 800 DEG C, the cathode current density is 6A/cm<2> to 13A/cm<2> and the electrobath voltage is 5V to 9V; the temperature is preserved for 10min to 40min after one hour of electrolysis, and the Mg-Zr alloy is deposited near the cathode in the molten salt electrobath; the whole process is carried out underthe ...

Method for preparing graded hollow structure NiO/Ni electrode material by microwave process

The invention relates to a method for preparing a graded hollow structure NiO/Ni electrode material by a microwave process, which comprises the following steps: dissolving 1-2g of Ni(NO3)2 in 50mL of distilled water, adding 0.1-0.5g of NH4NO3 while magnetically stirring at room temperature, dissolving by stirring, slowly and dropwisely adding 6-12mL of NH3.H2O (wt% 25) until the solution becomes azure blue from green, suspending a treated 1cm*1cm foam nickel screen in the reaction solution, and reacting at 90 DEG C in a microwave ultrasonic ultraviolet synthesizer under the condition of 100-200W for 0.5-4 hours; after the reaction finishes, cooling to room temperature, taking out a viridian Ni(OH)2-carried porous Ni screen, washing with distilled water, and drying to obtain a Ni(OH)2-precursor-carried electrode; and putting the obtained electrode in a muffle furnace, and calcining at the high temperature of 200-400 DEG C in an air atmosphere for 1-3 hours to obtain the black-NiO-carried ...

Simple hydrotalcite stripping method

The invention provides a simple hydrotalcite stripping method, which is characterized by comprising the following steps: weighing a certain amount of divalent metal salt and trivalent metal salt which can form hydrotalcite and cannot be oxidized in hydrogen peroxide, pouring into H2O2-containing aqueous solution with 10 to 90 volume percent of H2O2, stirring until the divalent metal salt and the trivalent metal salt are completely dissolved, adding a material which is not decomposed at the normal temperature and is decomposed by heating to make the solution alkaline, uniformly stirring, transferring the mixed solution to a high pressure reactor, reacting at the temperature of between 100 and 200 DEG C for 1 to 72 hours, filtering, and repeatedly washing to neutral to prepare a colloidal product. An ultrahigh pressure environment is created in the reactor under the condition of no template agent by taking the H2O2-containing aqueous solution as a solvent and utilizing a property that H2O2 ...

Rose-shaped nano zinc oxide and preparation method thereof

The invention provides rosette nanometer zinc oxide and a preparation method thereof. Zn(NO3) question mark 6H2O is added into absolute ethyl alcohol solution to obtain reaction mixture; then the reaction mixture is injected into a high pressure reaction kettle with an inside lining polyfluortetraethylene liner and sealed; the reaction kettle which has reaction mixture is heated to 180 DEG C, and the temperature is kept for 2 to 10 hours; after the kettle is naturally cooled to room temperature, the obtained products are centrifugalized and washed with deionized water, and then put into a vacuum drying cabinet for drying for 12 hours at the temperature of 25 DEG C; finally the rosette nanometer zinc oxide is obtained. The invention adopts more accessible absolute ethyl alcohol with nontoxic and low price as revulsant which simultaneously plays the function of scattering so as to reduce agglomeration. The single and uniform rosette nanometer zinc oxide is obtained by the method, which adds ...

Method for crystallizing protein by using ion liquid

This invention provides a method for crystallizing proteins from protein solution with ionic liquid-water mixed solution. The ionic liquid-water mixed solution is composed of ionic liquid 1-85wt.%, and buffer solution 1-25 wt.%, and the pH value is 4.0-11.0. The method has a wide process conditions, and can obtain protein single crystals with different morphologies under different conditions. Theobtained protein single crystals have such advantages as high diffractive intensity, high repeatability and high operability.

Phosphor and tungsten hetero-multi-quaternary ammonium salt desulfurizing agent and preparation method thereof

The invention provides a de-sulfur agent for quaternary ammonium tungstophosphates heteropoly and the preparation method of the de-sulfur agent. The technical proposal of the invention is that: one of cetyltrimethylammonium chloride, cetyl pyridinium chloride or tetramethylammonium chloride and phosphotungstic acid are weighted according to the mass ratio of 1:2 to 2:1; one of the cetyltrimethylammonium chloride, the cetyl pyridinium chloride or the tetramethylammonium chloride and the phosphotungstic acid are respectively dissolved in distilled water to prepare water solutions; under continuous stirring, the water solution of one of the cetyltrimethylammonium chloride, the cetyl pyridinium chloride or the tetramethylammonium chloride is dropped into the water solution of the phosphotungstic acid, and sedimentation is gradually generated; after the dropping is finished, the stirring is continued for three hours; when the sedimentation is completed, pumping filtration is performed; thesediment ...

Silicasol modified Mg-Li alloy surface plasma oxidation treatment liquid and treatment method thereof

The invention provides a silicasol modified Mg-Li alloy surface plasma oxidation treatment solution and a treatment method thereof. The silicasol modified Mg-Li alloy surface plasma oxidation treatment solution is mixture which consists of 3 to 30 grams per liter of silicate, 1 to 10 grams per liter of sodium hydroxide, 10 to 30 milliliters per liter of triethanolamine, 2 to 30 milliliters per liter of silicasol and residual distilled water, with a pH value between 12 and 14. After the silicasol is added into silicate electrolyte, the thickness of a film is increased, and crystalline SiO2 and Mg2SiO4 phases are added in the phase composition of the film; simultaneously, due to introduction of the silicasol, the number of surface micropores and microcracks of the plasma electrolytic oxide film is obviously reduced; and the corrosion resistance is improved, namely the corrosion current is reduced and the polarization resistance is increased.

Gene chip for detecting various fish pathogens and detecting method thereof

The invention relates to a gene chip for detecting various fish pathogens and a detecting method thereof. The gene chip is constructed by pointing a probe of a quality control system and probes of 17 fish pathogens on the same solid phase carrier nylon membrane. The probes of the 17 fish pathogens comprise a probe for detecting 14 viruses, a probe for detecting amyjoodiniurn ocellaturn and gyrodactylus and a probe for detecting fish rickettsia. In the detection of the gene chip of the invention, signal judgment is carried out according to the condition that whether a hybridization point is blue or bluish violet or not by applying a digoxin hybridization developing method. The quality control system on the gene chip of the invention ensures the specificity and the sensitivity of detection and can carry out simultaneous detection on various fish pathogen microorganisms on the same nylon membrane; and the invention has the characteristic of high flux, can replace the traditional fish pathogen ...

Method for assembling nano zinc oxide on magnesium-lithium alloy surface

Preparation method for anion pillared hydrotalcite

The invention provides a method for preparing anion column support houghite, which comprises the steps of weighing M(II)(NO3)26H2O and M(III)(NO3)39H2O to prepare a nitrate aqueous solution; weighing NaOH and Na2CO3 to prepare a solution; adding the alkali solution and the salt solution into a three-necked bottle simultaneously, drop by drop and at a uniform speed till the pH value is 11.0 plus or minus 0.5; quickly transferring the mixed serous fluid into a high-pressure reactor through supercritical fluid; controlling the temperature and pressure conditions to reach a supercritical state at constant temperature and pressure; releasing the supercritical fluid within 10 to 60s, communicating with the atmosphere and obtaining the mesoporous houghite compound; baking the houghite to form the mesoporous oxide with the aperture of 5 to 15nm. The method introduces the supercritical fluid technology into the hydrothermal synthesis method, effectively prevents the formation of absorption layers ...

Method for electrodepositing inhibitor anion intercalation hydrotalcite film on surface of magnesium alloy

The present invention provides a method for electrodepositing an inhibitor anion intercalation hydrotalcite film on the surface of magnesium alloy. In a three-electrode system, a solution containing corrosion-inhibition anion intercalation hydrotalcite is used as electrolyte, magnesium alloy is used as a working electrode, a platinum sheet is used as a counter electrode, N2 is introduced at room temperature, the pH value of the electrolyte is 4.5 to 8.5, the scanning rate is 5 to 30mV/s, the scanning frequency is 5 to 15 times, and a hydrotalcite film is formed on the surface of the magnesium alloy by an electrodepositing method. In the present invention, the corrosion-inhibition anion intercalation hydrotalcite forms a film on the surface of the magnesium alloy by the electrodepositing method, a protective film with the functions of adsorbing corrosive ions and releasing an inhibitor is formed on the surface of the magnesium alloy by the etching of trace Cl<-> and the excellent adsorption ...

Medical image diagnosis ultrasonic probe device

The invention relates to a medical image diagnosis ultrasonic probe device and belongs to the technical field of medical instruments. The medical image diagnosis ultrasonic probe device comprises a probe self-cleaning box, a probe storage box and a device battery box. A device lifting rod is arranged on the lower side of the probe self-cleaning box and connected with the probe self-cleaning box through a device rotary ring. The device rotary ring is provided with a rotary ring fixing bolt. A lifting pressure pump is arranged on the lower side of the device lifting rod. A push piston is arranged in the lifting pressure pump. A device moving chassis is arranged on the lower side of the lifting pressure pump. A recording board supporting column is arranged on the upper right side of the device moving chassis and provided with a document recording board. By the adoption of the medical image diagnosis ultrasonic probe device, the functions are complete, use is convenient, when an ultrasonic ...

Method for assembling nano zinc oxide on magnesium-lithium alloy surface

The invention provides a method for assembling nanometer zinc oxide on the Mg-Li alloy surface. Firstly the Mg-Li alloy is chipped and burnished through abrasive paper until the surface is luminous and flat. After washing the burnished Mg-Li alloy with distilled water, the burnished Mg-Li alloy is put into the acetone. After 15 to 20 minutes of ultrasonic processing, the Mg-Li alloy is taken out and washed by distilled water. Then, the oil removing and alkali washing of the Mg-Li alloy is carried out, and the Mg-Li alloy is washed by distilled water. After dipping the Mg-Li alloy into the chromic anhydride solution of 60g/L for 3 to 4 minutes, the Mg-Li alloy is taken out and washed by distilled water for backup. The zinc salt is weighted and made into solution with required concentration. Ammonia water is added drop by drop under the effect of a magnetic stirring apparatus. The pH of the zinc salt solution is between 9.00 and 9.05. The solution is stirred, and the pretreated Mg-Li alloy ...

Method for crystallizing protein by using ion liquid

This invention provides a method for crystallizing proteins from protein solution with ionic liquid-water mixed solution. The ionic liquid-water mixed solution is composed of ionic liquid 1-85wt.%, and buffer solution 1-25 wt.%, and the pH value is 4.0-11.0. The method has a wide process conditions, and can obtain protein single crystals with different morphologies under different conditions. The obtained protein single crystals have such advantages as high diffractive intensity, high repeatability and high operability.

Method for preparing hydroxyapatite and hydrotalcite composite material with eggshell as raw material

The invention provides a method for preparing hydroxyapatite and hydrotalcite composite material with an eggshell as a raw material. The method comprises the steps of: drying eggshell with the surface being cleaned at the temperature from 313 to 393K for 1 to 12 hours, then calcining the eggshell at the temperature from 573 to 1273K for 1 to 12 hours to obtain a calcination product; (2) adding 0.56 to 5.6g of the calcination product with 50mL of distilled water, uniformly stirring, adding 50mL of NaH2PO4 solution to be mixed with the mixture to obtain reaction liquid I; (3) subjecting the reaction liquid I to ultrasonic treatment for 0.5 to 4.8 hours, adding 50mL of soluble salt solution of trivalent Al or trivalent Fe to obtain reaction liquid II; and (4) subjecting the reaction liquid II to reaction for 0.5 to 4.8 hours, and filtering and drying the reaction product to obtain the hydroxyapatite and hydrotalcite composite material. The preparation method is simple, low in cost and beneficial ...

Method for preparing corrosion inhibition anion intercalated layered double hydroxides/oxide composite material and application

The invention provides a corrosion-inhibiting anionic intercalated hydrotalcite/nano oxide composite material, a preparation method thereof and application of the corrosion-inhibiting anionic intercalated hydrotalcite/nano oxide composite material. The preparation method is as follows: corrosion-inhibiting anions are directly inserted between hydrotalcite layers by the one-step coprecipitation method and the roasting restoring method; the nano oxide is generated by means of in situ synchronization during the process of generation of hydrotalcite crystals by controlling the mixture ratio of divalent metal ions to trivalent metal ions, the pH value of a reaction solution and the reaction temperature; and the corrosion-inhibiting anionic intercalated hydrotalcite/nano oxide composite material with the anti-corrosive function is prepared. The invention is mainly characterized in that the in situ preparation method for the hydrotalcite/oxide composite material provided with a nano lamellar structure ...

Method for preparing 2, 4-dichloro-10,11-dihydro-5H-dibenzo [a, d] cycloheptene-5-alcohol

The invention relates to a method for preparing 2, 4-dichloro-10,11-dihydro-5H-dibenzo [a, d] cycloheptene-5-alcohol which is a medicine of a nitrate eberconazole intermediate with broad spectrum antifungal activity. The method has the advantages of easy obtaining of used raw materials and easier controllable reaction, and is more suitable for industrial production.

Simple hydrotalcite stripping method

The invention provides a simple hydrotalcite stripping method, which is characterized by comprising the following steps: weighing a certain amount of divalent metal salt and trivalent metal salt which can form hydrotalcite and cannot be oxidized in hydrogen peroxide, pouring into H2O2-containing aqueous solution with 10 to 90 volume percent of H2O2, stirring until the divalent metal salt and the trivalent metal salt are completely dissolved, adding a material which is not decomposed at the normal temperature and is decomposed by heating to make the solution alkaline, uniformly stirring, transferring the mixed solution to a high pressure reactor, reacting at the temperature of between 100 and 200 DEG C for 1 to 72 hours, filtering, and repeatedly washing to neutral to prepare a colloidal product. An ultrahigh pressure environment is created in the reactor under the condition of no template agent by taking the H2O2-containing aqueous solution as a solvent and utilizing a property that H2O2 ...

Method for electrodepositing inhibitor anion intercalation hydrotalcite film on surface of magnesium alloy

The invention provides a method for electrodepositing an inhibitor anion intercalation hydrotalcite film on the surface of magnesium alloy. In a three-electrode system, a solution containing corrosion-inhibition anion intercalation hydrotalcite is used as electrolyte, magnesium alloy is used as a working electrode, a platinum sheet is used as a counter electrode, N2 is introduced at room temperature, the pH value of the electrolyte is 4.5 to 8.5, the scanning rate is 5 to 30mV/s, the scanning frequency is 5 to 15 times, and a hydrotalcite film is formed on the surface of the magnesium alloy by an electrodepositing method. In the invention, the corrosion-inhibition anion intercalation hydrotalcite forms a film on the surface of the magnesium alloy by the electrodepositing method, a protective film with the functions of adsorbing corrosive ions and releasing an inhibitor is formed on the surface of the magnesium alloy by the etching of trace Cl and the excellent adsorption and film formation ...

Magnetic solid super strong acid catalyst and its preparing method

Gd-doped magnesium lithium alloy

The invention provides a Gd-doped magnesium-lithium alloy, which comprises the following components in weight percent: 6 to 9 percent of Li, 2 to 5 percent of Al, 0.5 to 2 percent of Zn, 0.2 to 1.5 percent of Gd, and the balance being Mg. The rare earth GD is introduced into the magnesium-lithium alloy on the basis of the addition of common magnesium-lithium alloy strengthening elements Al and Zn. Al is the main strengthening element of the alloy, while Zn is also the strengthening element of the alloy and changes the plasticity of the alloy simultaneously; and the Gd can generate solution strengthening action to improve the microstructure of the alloy and refine crystal grains. At the same time, the improvement of Li content allows the alloy to be positioned in an alpha+beta two-phase region, thereby improving the plasticity of the alloy and reducing density of the alloy simultaneously.

Method for preparing aluminum-gadolinium-samarium alloy by fused salt electrolysis

The invention relates to a method for preparing an aluminum-gadolinium-samarium alloy by fused salt electrolysis, which comprises the following steps: using AlF3+NaCl+KCl as a fused salt electrolyte system, wherein the percentage by mass of the AlF3 is 10-12%, the percentage by mass of the NaCl is 36-40%, and the percentage by mass of the KCl is 47-50%; adding anhydrous Sm2O3 and Gd2O3 mixed powder according to 10-20% of the mass of the AlF3; porphyrizing in a mortar, and uniformly mixing; using inert metal molybdenum as the cathode and graphite as the anode to carry out electrolysis, whereinthe electrolysis temperature is 640-840 DEG C, a submerged cathode process is adopted, the anode-cathode distance is 4 cm, the cathode current density is 3.1-9.3 A/cm<2>, the anode current density is0.5 A/cm<2>, the tank voltage is 3.9-5.1 V, and the electrolysis time is 1.8-3 hours; and finally, depositing the Al-Gd-Sm ternary alloy in the vicinity of the cathode of the fused salt electrolysis tank ...

Method for preparing single anion anion pillared hydrotalcite

The invention provides single anion pillared layered double hydroxides and a preparation method thereof. At room temperature, (MII)(NO3)2 question mark 6H2O and M(III)(NO3)2 question mark 9H2O are respectively weighed and prepared into nitrate aqueous solution according to the mol ration of 2-4 of (MII)/M (III); in addition, NaOH and Na2CO3 are respectively weighed and prepared into lye; under thestrong magnetic stirring, the lye and the nitrate aqueous solution are simultaneously and dropwise added into a container at uniform speed and dripped until pH is 10.0 plus or minus 0.5; the blendedserum is aged for 8h at the temperature of 65 DEG C, filtered and repeatedly washed till being neutral, and dried for 24h in a vacuum drying cabinet at 700 DEG C; the dried matter is baked for 2h at the temperature of 450 DEG C to form layered double oxide; under protection of N 2, after the baked layered double oxide is placed in to a container which has single anion solution, put in a constant temperature ...

Method for preparing composite coating by surface differential arc oxidation/chemical conversion of Mg-Li alloy

The invention provides a method for preparing a micro-arc oxidized/chemically converted composite coating on the surface of Mg-Li alloy. The method comprises the following steps: in an electrolyte consisting of 3 to 30 grams of silicate per liter, 1 to 10 grams of sodium hydroxide per liter, 10- 30 milliliters of triethanolamine per liter and 1 to 3 liters of distilled water, pretreated Mg-Li alloy is subjected to micro-arc oxidation for 4 minutes by use of a constant-current micro-arc oxidation mode, at the pulse frequency of 2,000 Hz, with the duty cycle of 15 percent and the current density of 5 A/dm<2>; the Mg-Li alloy subjected to the micro-arc oxidation is completely placed in a chemical conversion solution; the conversion solution consists of 5 to 40 grams of molybdate per liter, 1 to 10 grams of sodium fluoride per liter and 1 to 15 milliliters of hydrogen peroxide with the concentration of 30 percent; the reaction temperature of chemical conversion is 45 DEG C; the reaction time ...

Silicasol modified Mg-Li alloy surface plasma oxidation treatment method

The invention provides a silicasol modified Mg-Li alloy surface plasma oxidation treatment solution and a treatment method thereof. The silicasol modified Mg-Li alloy surface plasma oxidation treatment solution is mixture which consists of 3 to 30 grams per liter of silicate, 1 to 10 grams per liter of sodium hydroxide, 10 to 30 milliliters per liter of triethanolamine, 2 to 30 milliliters per liter of silicasol and residual distilled water, with a pH value between 12 and 14. After the silicasol is added into silicate electrolyte, the thickness of a film is increased, and crystalline SiO2 andMg2SiO4 phases are added in the phase composition of the film; simultaneously, due to introduction of the silicasol, the number of surface micropores and microcracks of the plasma electrolytic oxide film is obviously reduced; and the corrosion resistance is improved, namely the corrosion current is reduced and the polarization resistance is increased.

Method for preparing composite coating by surface differential arc oxidation/chemical conversion of Mg-Li alloy

The invention provides a method for preparing a micro-arc oxidized/chemically converted composite coating on the surface of Mg-Li alloy. The method comprises the following steps: in an electrolyte consisting of 3 to 30 grams of silicate per liter, 1 to 10 grams of sodium hydroxide per liter, 10- 30 milliliters of triethanolamine per liter and 1 to 3 liters of distilled water, pretreated Mg-Li alloy is subjected to micro-arc oxidation for 4 minutes by use of a constant-current micro-arc oxidation mode, at the pulse frequency of 2,000 Hz, with the duty cycle of 15 percent and the current density of 5 A/dm<2>; the Mg-Li alloy subjected to the micro-arc oxidation is completely placed in a chemical conversion solution; the conversion solution consists of 5 to 40 grams of molybdate per liter, 1to 10 grams of sodium fluoride per liter and 1 to 15 milliliters of hydrogen peroxide with the concentration of 30 percent; the reaction temperature of chemical conversion is 45 DEG C; the reaction time ...

Method for preparing composite metal oxide with graded porous structure

The invention provides a method for preparing a composite metal oxide with a graded porous structure. The method comprises the following steps of: pouring a bivalent metal salt and a trivalent metal salt into a container filled with a mixed solvent of ethylene glycol and water, placing the container into a closed container filled with thick aqueous ammonia after dissolution, and reacting the volatilized aqueous ammonia and the metal salts on the surface of the solution layer by layer at room temperature to generate hydrotalcite sol; and pouring out the transparent solution of the upper layer, transferring the rest sol into a crucible, insulating and ageing the sol for 12 hours at the temperature of between 80 and 180 DEG C, directly performing suction filtration on the aged sol under reduced pressure, drying the obtained filter cakes in an oven, finally putting the dried gel product into the crucible, roasting the gel product for 5 hours at the temperature of between 300 and 500 DEG C, ...

Method for preparing hydrotalcite from egg shells serving as raw material

The invention provides a method for preparing hydrotalcite from egg shells serving as a raw material. The method comprises the following steps of: drying the egg shells at the temperature of between 313 and 393K DEG C for 1 to 12 hours, and then roasting at the temperature of between 573 and 1,273K DEG C for 1 to 12 hours to obtain a roasted product; adding 0.56 to 2.24 grams of roasted product into every 20 to 50 milliliters of distilled water, stirring the mixture for 5 to 100 minutes, and mixing the mixture and 20 to 50 milliliters of salt solution containing trivalent metal ions to obtain the reaction solution in a molar ratio of Ca to the trivalent metal ion of 5:1-2:1; and reacting the reaction solution for 0.5 to 48 hours, and filtering and drying to obtain the hydrotalcite. The method for preparing the hydrotalcite is simple, has low cost, and is favorable for actual production; and the raw materials such as NaOH, ammonia water and the like do not need to be added to provide an ...

Gd-doped magnesium lithium alloy

The invention provides a Gd-doped magnesium-lithium alloy, which comprises the following components in weight percent: 6 to 9 percent of Li, 2 to 5 percent of Al, 0.5 to 2 percent of Zn, 0.2 to 1.5 percent of Gd, and the balance being Mg. The rare earth GD is introduced into the magnesium-lithium alloy on the basis of the addition of common magnesium-lithium alloy strengthening elements Al and Zn. Al is the main strengthening element of the alloy, while Zn is also the strengthening element of the alloy and changes the plasticity of the alloy simultaneously; and the Gd can generate solution strengthening action to improve the microstructure of the alloy and refine crystal grains. At the same time, the improvement of Li content allows the alloy to be positioned in an alpha+beta two-phase region, thereby improving the plasticity of the alloy and reducing density of the alloy simultaneously.

Surface treating method for magnesium lithium alloy

The invention provides a method for processing the surface of magnesium-lithium alloy. The technique of micro-arc oxidation is successfully applied to processing the surface of the magnesium-lithium alloy. Direct current/ DC pulse/alternating current pulse multiplex power supply is used and the magnesium-lithium alloy with different lithium contents in a compound electrolyte system of sodium polyphosphate, sodium silicate, calgon and sodium hydroxide is carried out by micro-arc oxidation for 2-120min. A ceramic oxide film of 10-100Mum with a rigidity higher than 200Hv is formed in situ on the surface of the magnesium-lithium alloy, thus remarkably improving corrosion resistant property compared with an alloy matrix, solving the problem known at home and abroad concerning processing the surface of the magnesium-lithium alloy and broadening the application in the fields of aviation, aerospace, car, electronic, etc.

Reduction method for Mg-Li alloy surface organic matter

Laminated self-adjusting packer

The invention belongs to the field of installation of offshore jackets, and particularly relates to a laminated self-adjusting packer which is characterized in that two packing plate groups are arranged up and down, a self-expansion device capable of automatically expanding when encountering water is arranged between the two packing plate groups, and each packing plate group comprises at least three packing plates arranged on a sleeve in a sleeving manner; the sealing partition plates are adjusted in a relative sliding mode in the radial direction along with the change of the distance between the outer wall of the sleeve and the inner surface of the steel pile in the falling process that the sleeve is sleeved with the steel pile. The uppermost layer of sealing partition plate in the upper sealing partition plate set is fixedly connected to the outer wall of the sleeve, the lowermost layer of sealing partition plate is a middle layer of sealing partition plate, the uppermost layer of sealing ...

Magnetic composite oxides preparation method and use of magnetic composite oxides as anionic pollutant absorbent

The invention provides a preparation method of a magnetic composite oxide and the application of the oxide for serving as an adsorbent of negative ion pollutants. FeSO4 question mark 7H2O and Fe2(SO4)3 question mark XH2O are used for preparing a magnetic medium; an alkali liquor that is prepared by the magnetic medium, divalent metal ions, trivalent metal ions, NaOH and Na2CO3 is prepared into a magnetic houghite precursor; and the magnetic houghite precursor is baked to obtain a baked magnetic composite oxide. The baking product of the magnetic houghite precursor that is obtained by the preparation method is used for absorbing the negative ion pollutants in water bodies, has higher absorbing capacity, and can be easily separated and recycled after adsorption.

Gene chip for detecting various prawn pathogenes and detection method thereof

The invention relates to a gene chip for detecting various prawn pathogenes and a detection method thereof. The gene chip is prepared by arranging the probes of a quality control system and the probe points of 18 types of prawn pathogenes on the same solid-phase carrier nylon membrane. The probes of 18 types of the prawn pathogenes comprise probes for detecting 15 types of viruses, probes for detecting fusarium, fish-killing aphanomyces and deformation algal filament cristatum, and probes for detecting Paranophrys and prawn rickettsia. When the gene chip is used for detection, a signal is judged according to the condition whether blue or royal purple appears at a hybridization point by using a digoxin hybridization chromogenic method. The construction of the quality control system on the gene chip ensures the detection specificity and sensitivity, thus, the gene chip can be used for simultaneously detecting various prawn pathogenic microorganisms on the same nylon membrane, has the characteristic ...

Phosphor and tungsten hetero-multi-quaternary ammonium salt desulfurizing agent and preparation method thereof

New method for preparing 2-n-propyl-4-methyl-6-(1-methyl benzimidazole-2-yl) benzimidazole

The invention relates to a new method for preparing 2-n-propyl-4-methyl-6-(1-methyl benzimidazole-2-yl) benzimidazole for industrialized use.

Magnetic solid super strong acid catalyst and its preparing method

The magnetic solid super strong acid is prepared by using magnetic matter Fe3O4, Ni-Fe3O4, Co-Fe3O4, or Mn-Fe3O4 and super strong solid acid through improved chemical codeposition and homogenization.The technological process consists of preparation of magnetic fluid, supersonic dispersion, furmation of sol-gel solution, magnetic separation and washing, stoving and baking. The magnetism makes theseparation and recovering of the catalyst and reaction product easy and possess high acidity and porosity. The catalyst is friendly to environment and high in efficiency and has wide application in alkylation, isolmerization, esterification, etc. of hydrocarbon.

Integrated ultrasonic imaging diagnosis analyzer

The invention relates to an integrated ultrasonic imaging diagnosis analyzer and belongs to the technical field of medical equipment. The integrated ultrasonic imaging diagnosis analyzer comprises an ultrasonic equipment body, a power line output port is arranged on the left side of the ultrasonic equipment body, a power lead is arranged on the left side of the power line output port and provided with a power plug, supporting leg fixing devices are arranged on the lower side of the ultrasonic equipment body, an equipment supporting leg is arranged on the lower side of each supporting leg fixing device, a rotary connecting ring is arranged on the lower side of each equipment supporting leg, a pulley fixing leg is arranged on the lower side of each rotary connecting ring, a movable pulley is arranged on the lower side of each pulley fixing leg, and a braking device is arranged on each movable pulley. The integrated ultrasonic imaging diagnosis analyzer is simple in structure, easy and convenient ...

Reduction method for Mg-Li alloy surface organic matter

The invention provides a reduction method of organics on the surface of Mg-Li alloy. One of butanone, hypnone, ethyl benzoate, butyl acetate, benzene, xylene, phytic acid, oleic acid, and Alpha-naphthylamine or epoxy resin is used as a reagent; the mixture of one or two or more than two of diluted hydrochloric acid, isopropanol;, absolute ethyl alcohol, ammonium chloride, aminoethyl alcohol, aniline, n-butylamine or 36 percent of acetic acid is used as an accelerant; according to the volume ratio of the reagent and the accelerant of 1:1-6:1, the reagent and the accelerant are mixed to prepare reaction solution. The pH value of the reaction solution is adjusted to be 6-7 and the Mg-Li alloy is dipped in the reaction solution and reacts for 8 hours at the temperature of 60 DEG C. Through the reaction of the organics on the surface of the Mg-Li alloy, the substance is generated in the invention and the properties and functions of substance have an effect on the surface of the Mg-Li alloy.

Method for preparing hydrotalcite from egg shells serving as raw material

The invention provides a method for preparing hydrotalcite from egg shells serving as a raw material. The method comprises the following steps of: drying the egg shells at the temperature of between 313 and 393K DEG C for 1 to 12 hours, and then roasting at the temperature of between 573 and 1,273K DEG C for 1 to 12 hours to obtain a roasted product; adding 0.56 to 2.24 grams of roasted product into every 20 to 50 milliliters of distilled water, stirring the mixture for 5 to 100 minutes, and mixing the mixture and 20 to 50 milliliters of salt solution containing trivalent metal ions to obtainthe reaction solution in a molar ratio of Ca to the trivalent metal ion of 5:1-2:1; and reacting the reaction solution for 0.5 to 48 hours, and filtering and drying to obtain the hydrotalcite. The method for preparing the hydrotalcite is simple, has low cost, and is favorable for actual production; and the raw materials such as NaOH, ammonia water and the like do not need to be added to provide an alkaline ...

Single anion pillared hydrotalcite and preparation method thereof

The invention provides single anion pillared layered double hydroxides and a preparation method thereof. At room temperature, (MII)(NO3)2 question mark 6H2O and M(III)(NO3)2 question mark 9H2O are respectively weighed and prepared into nitrate aqueous solution according to the mol ration of 2-4 of (MII)/M (III); in addition, NaOH and Na2CO3 are respectively weighed and prepared into lye; under the strong magnetic stirring, the lye and the nitrate aqueous solution are simultaneously and dropwise added into a container at uniform speed and dripped until pH is 10.0 plus or minus 0.5; the blended serum is aged for 8h at the temperature of 65 DEG C, filtered and repeatedly washed till being neutral, and dried for 24h in a vacuum drying cabinet at 700 DEG C; the dried matter is baked for 2h at the temperature of 450 DEG C to form layered double oxide; under protection of N 2, after the baked layered double oxide is placed in to a container which has single anion solution, put in a constant temperature ...

Method for producing recombined pigskin using leftover material of broken pigskin

The invention relates to a method for producing recombinant pigskin by using broken pigskin leftover materials, which comprises the following steps: (1) material selection; (2) acidolysis; (3) boiling; (4) filtering; (5) salination; (6) neutralization; (7) blending; (8) enzyme catalysis; (9) pouring and forming; and (10) air curing. The method uses broken pigskins including the broken pigskins produced through division processing, scourged pigskins, gore pigskins and the like as raw materials to produce the entire pigskin, and adopts a glutamine transaminage preparation to perform biocatalysis on the entire reaction system so as to achieve the recombination of the broken pigskins. Using the glutamine transaminage preparation to process the broken pigskins for recombination and forming, the recombinant pigskin cannot be re-dispersed due to freezing, slicing, stewing, cooking and the like. The method recombines the pigskins for reuse, which not only revalues the pigskins, but also reduces ...

Method for inducing self-assembled shuttle-shaped nano cupric oxide

The invention provides a method for the induced self-assembly of spindle-shaped nano copper oxide. The method comprises: placing Cu(NO3)2.6H2O into deionized water to prepare a 0.1M copper nitrate solution; adding the 0.1M copper nitrate solution into a 0.05M hexamethylene tetramine solution of the same volume as the copper nitrate solution with constant stirring to form a mixed solution; adding C16h33(CH3)3NBr into the mixed solution according to a principle of 0.04 to 0.4 g C16h33(CH3)3NB per 100ml of the mixed solution; adjusting the pH value to be 7.0 by a sodium hydroxide solution and heating the solution to 100 DEGC with stirring and keeping the temperature for 1 to 5 hours; cooling the solution to normal temperature; separating the solution through centrifugation; washing the substance separated out with the deionized water for a plurality of times; and drying the substances at 40 DEG C for 6 hours to obtain the spindle-shaped nano copper oxide. The method has the characteristic ...

Main beam turning-over device and turning-over process thereof

The main beam turnover device comprises a hydraulic power system, an equipment frame, a turnover plate mechanism and an auxiliary mechanism, the turnover process of the main beam turnover device is matched, 90-degree turnover of a main beam can be achieved through the two main beam turnover devices, and therefore follow-up machining of the main beam is conducted. Manual carrying and overturning are not needed in the whole overturning process, the whole process is automatically carried out, manpower is liberated, and meanwhile precise, efficient and high-quality overturning of the large-size and large-weight main beam is guaranteed.

Method for preparing composite metal oxide with graded porous structure

The invention provides a method for preparing a composite metal oxide with a graded porous structure. The method comprises the following steps of: pouring a bivalent metal salt and a trivalent metal salt into a container filled with a mixed solvent of ethylene glycol and water, placing the container into a closed container filled with thick aqueous ammonia after dissolution, and reacting the volatilized aqueous ammonia and the metal salts on the surface of the solution layer by layer at room temperature to generate hydrotalcite sol; and pouring out the transparent solution of the upper layer,transferring the rest sol into a crucible, insulating and ageing the sol for 12 hours at the temperature of between 80 and 180 DEG C, directly performing suction filtration on the aged sol under reduced pressure, drying the obtained filter cakes in an oven, finally putting the dried gel product into the crucible, roasting the gel product for 5 hours at the temperature of between 300 and 500 DEG C, and ...

Modularized integral processing method for gantry crane

The invention relates to a modular integral machining method for a field bridge. The modular integral machining method comprises the following steps of 1, building a three-dimensional model of the field bridge, 2, machining a main beam module, 3, machining a supporting leg module, 4, machining a cross beam, and 5, performing final assembly on the main beam module, the supporting leg module and the cross beam. Three-dimensional software is adopted to generate a three-dimensional model, the splicing state of the supporting legs, the cross beams and the main beams is simulated, the adjustment work caused by accumulated deviation of component manufacturing in the later period is reduced, the external field splicing period is effectively shortened, the main structure main beams and the supporting legs are manufactured in a modularized mode, the pre-splicing procedure of the supporting legs is omitted through component flange lineation machining, and the production efficiency is improved. The ...