36 results about "Hydroxide" patented technology

The invention relates to a lithium silicate-coated Ni-Co lithium aluminate positive electrode material and a preparation method thereof. The mass percent of lithium silicate in the material accounts for 1-10wt%, a coating layer with a thickness being 2-20 nanometers is formed from the silicon silicate and is coated on Ni-Co lithium aluminate, and the positive electrode material is a spherical particle with a grain size being 5-15 micrometers. The method comprises the following steps of (1) adding a silicon source into an organic solvent, performing uniform stirring, adding water, adding Co-Alnickel hydroxide, performing heating and stirring reaction, and performing drying to obtain silicon dioxide-coated Co-Al nickel hydroxide precursor powder; and (2) grinding and uniformly mixing the silicon dioxide-coated Co-Al nickel hydroxide precursor powder and a lithium salt, placing the mixture in a tubular furnace, and performing two-segment calcination under an oxidization atmosphere, thereby obtaining the lithium silicate-coated Ni-Co lithium aluminate positive electrode material. The positive electrode has relatively good cycle stability and large-rate discharging performance; and bythe method, the problem of lithium resided on a surface during conventional coating can be effectively reduced, and the method is low in cost and simple in process and is suitable for industrial production.

The invention discloses a cleaning fluid applied for automatic biochemical analyzers, comprising: at least one anion surface active agent, at least one nonionic surface active agent, an alkali metal hydroxide, an alkali metal citrate and a buffer agent for stabilizing pH value above 13.0. The cleaning fluid has low protein residual rate, low fatty material residual rate, good in-batch repeatability, low cross pollution and low reactant deposition rate in clinical application after cleaning. And the cleaning fluid will not affect the test result of biochemical analyzers, and has not corrosion on the liquid circuit system and reaction cup of analyzers. All components of the cleaning fluid can be degraded biologically, to avoid potential environment pollution and meet environment protection requirement.

The invention relates to the field of lithium carbonate preparation, in particular to a method for extracting lithium from brine to prepare battery-grade lithium carbonate by an ion exchange method. The method includes the steps of 1), removing magnesium by a coprecipitation method; 2), adsorbing to extract the lithium by a manganese adsorbent; 3), preparing the battery-grade lithium carbonate, namely adding alkaline liquor into a desorption solution in the step 2), regulating a pH value to 7-12, producing manganese hydroxide precipitate, filtering the manganese hydroxide precipitate, concentrating filtrate until the lithium content reaches 20-30 g/L, filtering to remove sodium chloride, adding a saturated sodium carbonate solution to react, filtering, and subjecting filter cakes to water scrubbing so as to obtain the battery-grade lithium carbonate. The method has the advantages that hydrotalcite is obtained after magnesium removal, so that the problem of recycling the magnesium in the brine is solved; the content of various impurity ions in the desorption solution can be controlled effectively by removing the magnesium and extracting the lithium by adsorption sequentially, and then the battery-grade lithium carbonate is prepared.

The invention discloses an aluminum plastic plate flame-retardant core layer and an aluminum-plastic plate, and belongs to the technical field of building fireproof materials, wherein the aluminum plastic plate flame-retardant core layer comprises, by weight, 30-50 parts of a matrix resin, 30-40 parts of a flame retardant agent, 0.5-1.5 parts of a flame retardant synergist, 1-2 parts of an anionicsurfactant, 2-4 parts of a compatibilizer, 1-2 parts of an antioxidant, and 0.5-1.5 parts of an antibacterial agent, wherein the matrix resin comprises low density polyethylene, polypropylene, an ethylene-octene copolymer and ethylene-ethyl acrylate according to a weight ratio of 6:2:1:1, and the flame retardant agent comprises magnesium hydroxide and expandable graphite according to a weight ratio of 6:1. According to the present invention, the prepared core layer has good mechanical property, can meet the requirements of the flame retardant B1 grade, and further has antibacterial property;and the aluminum plastic plate prepared from the flame retardant core layer has the good performances of the core layer, and further has the peel strength meeting the standard value.

The invention discloses a method for preparing rod-like magnesium hydroxide from salt lake brine. The method comprises the following steps of: concentrating and crystallizing salt lake brine, from which elements such as potassium and lithium are extracted, serving as a raw material to obtain bischofite; dissolving the bischofite separated by crystallization into water to prepare magnesium chloride solution; introducing ammonia gas to perform magnesium precipitation reaction; when the pH value reaches 7-8, stopping introducing the ammonia gas, reacting at the temperature of 30-50 DEG C for 0.5-2 hours, aging and filtering to obtain alkaline magnesium chloride and magnesium precipitation mother liquor; dispersing the alkaline magnesium chloride in mixed solution of ethanol and water to obtain alkaline magnesium chloride suspension; adding sodium hydroxide to further precipitate to obtain rod-like magnesium hydroxide; filtering and separating to obtain magnesium precipitation mother liquor; replenishing the bischofite and circulating for precipitating the alkaline magnesium chloride; feeding to an ammonia still process along with concentration enrichment of magnesium precipitation mother liquor in ammonia chloride; performing ammonia still with lime; and circulating the produced ammonia gas to precipitate the alkaline magnesium chloride of a next batch and producing byproduct calcium chloride, wherein the magnesium content in the brine is not less than 93.4 g/L. The method has the advantages of high product purity, good economic benefit, no environmental pollution, high operability and easiness for industrial production.

The invention relates to a high-temperature resistant heat insulating material using vermiculite as a main raw material and a method for manufacturing the same, which belong to the field of heat insulating materials. The method is characterized by comprising the following steps: firstly, quickly heating and swelling commercially available primary minerals of the vermiculite with large, medium and small diameters at a temperature of between 500 and 900 DEG C; secondly, mixing the swelled vermiculite with an aluminum dihydrogen phosphate bonding agent, aluminum hydroxide or rho-alumina, and nano-silica according to the requirement of weight percentage; stirring the mixture evenly in an airtight stirring machine and then filling the mixture into a die; after prepressing, performing hot pressing and shaping on the mixture; and after discharging, finishing the product properly to obtain the high-temperature resistant heat insulating material using the vermiculite as the main raw material. Through grain composition, density control, addition of the nano-silica and application of the high-temperature resistant bonding agent, and using small grained primary minerals of the vermiculite with large yield and low cost, the high-temperature resistant heat insulating material and the method solve the bottleneck problems of insufficient supply of large grained primary minerals of the vermiculite, and the improvements on the strength and the service temperature of the vermiculite heat insulating material at the same time, thus the material can keep a low coefficient of thermal conductivity under a high temperature condition.

The invention discloses novel cleaning fluid. The novel cleaning fluid comprises (a) quaternary amine hydroxide, (b) alcohol amine, (c) solvent, (d) silane (e) boric acid ester (borate) and (f) a star-shaped copolymer containing pigment affinity group. The photoresist stripping fluid takes silane, boric acid ester and the star-shaped copolymer containing pigment affinity group as the main metal corrosion inhibitor, so that the base materials, such as metal aluminum, copper and the like can be effectively prevented from being etched basically in compounding and in use; meanwhile, the stripping fluid can effectively remove the photoresist from a wafer, and can directly rinse the cleaned wafer by water. Therefore, the novel cleaning fluid has wide application prospects in metal cleaning, semiconductor wafer cleaning and other microelectronic fields.

The present invention relates to the synthesis of rhodiola glycoside compound. Under the catalyst of boron trifluoride etherate, trifluoromethyl sulfonic acid, trialkylsilyl triflate, perchloric acid or other Lewis acid, 1-glycoimino ester and substituted phenyl ethanol as raw material react to produce polysubstituted rhodiola glycoside compound; and the polysubstituted rhodiola glycoside compound is reacted with hydroxide, carbonate or methoxide to produce rhodiola glycoside compound. The said process is simple, high in yield and suitable for industrial production.

The invention discloses a calcium citrate producing method includes following steps: (1) contacting a citric acid fermentation clear liquid with heavy calcium carbonate to obtain a crude calcium citrate crystal; (2) acidically hydrolyzing the crude calcium citrate crystal with hydrochloric acid to obtain a solution and filtering the solution; and (3) contacting a filtrate with one or more of a carbonate of alkali metals, a hydroxide of the alkali metals, an oxide of the alkali metals, ammonium carbonate and ammonium bicarbonate. The producing method can obtain the crude calcium citrate crystal precipitation directly through reaction between the simply-filtered impurity-containing crude citric acid fermentation clear liquid and the heavy calcium carbonate and then the high-purity calcium citrate, which is 99.9-99.99% in purity and can reach a standard in United States Pharmacopeia USP33-NF28 and American food additives FCC5, can be obtain just by performing one filtering process for removing impurities and performing a contact reaction between the obtained filtrate and one or more of the carbonate of alkali metals, the hydroxide of the alkali metals, the oxide of the alkali metals, the ammonium carbonate and the ammonium bicarbonate.

The invention relates to a preparation method of D-p-hydroxyphenylglycine methyl ester. The preparation method comprises the following steps: (1) esterifying: carrying out an esterification reaction on D-p-hydroxyphenylglycine and methanol to obtain D-p-hydroxyphenylglycine methyl ester sulfate, and distilling off methanol and water under reduced pressure, wherein the D-p-hydroxyphenylglycine is added one time, and the methanol is added in batches; and (2) crystallizing the D-p-hydroxyphenylglycine methyl ester. The preparation method can very easily control the reaction endpoint, so that theyield and the quality index of the finished product can be guaranteed to the maximum extent; the preparation method provided by the invention avoids the problems of safety and operation caused by hydrogen chloride gas or thionyl chloride; and in the step of D-p-hydroxyphenylglycine methyl ester crystallization, an alkali metal hydroxide is used for adjusting the pH value of the system without using ammonia water, so that the problem that ammonia ions are difficult to treat is avoided.

The invention discloses a flame retardant type rubber asphalt waterproof paint. The flame retardant type rubber asphalt waterproof paint comprises the following components in parts by mass: 22-30 parts of asphalt, 3-6 parts of an emulsifying agent, 10-20 parts of rubber, 4-8 parts of layered double hydroxide, 10-16 parts of a filler, 2-4 parts of a stabilizer, 1-3 parts of a defoaming agent and 30-45 parts of water. Through the flame retardant type rubber asphalt waterproof paint, the flame retardant problem of the waterproof material is solved. The paint has the characteristics of good aging resistance and waterproof property, good flame retardant effect and long service life.

The present invention discloses a decomposable environmentally-friendly heat-insulation packaging bag which comprises the following parts by weight of raw material components: 20-40 parts of straw fiber, 10-15 parts of rice husk powder, 10-15 parts of acrylate-1 and 1-dichloroethylene copolymer, 1-2 parts of zinc gluconate, 1-2 parts of gelatin, 2-8 parts of aluminum hydroxide, 2-6 parts of potassium hydroxide, 13-15 parts of furfuryl alcohol resin, 2 5 parts of zinc oxide, 0.5-1 part of talc powder, 5-6 parts of wax, 1-3 parts of silica powder, 2-4 parts of tetrahydrofuran, 8-13 parts of polyethylene, 0.5-1 part of nano-organic montmorillonite, 2-6 parts of silicon oxide powder, 2-4 parts of a foaming agent and 2-4 parts of clay. The decomposable environmentally-friendly heat-insulation packaging bag takes the environmentally friendly materials, is green and environmentally-friendly, has heat-insulation effect, and is suitable for cooked food packaging.

The invention discloses a composite degradation material of aluminum hydroxide-poly-butylene succinate and a preparation technology thereof, the composite degradation material is made by blending and extruding the materials of aluminum hydroxide and the poly-butylene succinate, etc. and an addition agent; the weight percentage is as follows: 40 to 50 percent of the aluminum hydroxide, 35 to 50 percent of the poly-butylene succinate, 5 to 10 percent of polylactic acid, 5 to 10 percent of starch and1.5 percent of the addition agent. The composite degradation material can reduce the production cost of the degradation materials, improve the performance of products and can be widely applied in fields such as toys, electronics and industrial packaging, etc.

The invention relates to a preparation method of pearlescent anti-crease waterproof moisture-permeable polyurethane synthetic leather. The preparation method comprises the steps: weighing raw materials of a surface layer, mixing activated carbon, nitrocellulose, a dried color material, a pearl powder and colored plastic particles, then grinding, adding a proper amount of an acetic acid solution and polyurethane, adjusting the pH to be neutral, carrying out freeze drying, then grinding, adding the remaining raw materials, and stirring, to obtain a surface layer slurry; evenly coating release paper with the surface layer slurry, and drying to form a surface layer; weighing raw materials of a middle layer, mixing expanded graphite, quartz sand, magnesium oxide and aluminum hydroxide, then calcining the mixture, adding a stripping agent BYK-325, then treating for 1-2 h, cooling, then adding boric acid and wood powder, grinding, adding the remaining raw materials, and stirring to obtain a foaming layer slurry; mechanically foaming the prepared foaming layer slurry, then evenly coating the surface layer with the foamed foaming layer slurry, and drying; coating the foaming layer with a water-based polyurethane adhesive slurry, bonding with a base cloth layer, and then drying; and peeling off the release paper, trimming, rolling, and thus obtaining the synthetic leather finished product.

The invention discloses a flame-retardant and wear-resisting rubber material for a borehole cable sheath and a preparation method of the flame-retardant and wear-resisting rubber material. The flame-retardant and wear-resisting rubber material is prepared from nitrile rubber, natural rubber, triethyl citrate, benzoxazine resin, magnesium dimethacrylate, acetyl benzoyl peroxide, ethanol [2-[2-(2-methoxyethoxy)ethoxy]ethyl], triester with boric acid, gamma-aminopropyltriethoxysilane, polychlorinated terphenyl, dimethyldiethoxysilane, tricresyl phosphate, magnesium hydroxide, white jade powder, microcrystalline wax, hydrogenated rosin resin and the like. By matching the nitrile rubber with the natural rubber for use, the flame-retardant and wear-resisting rubber material has the advantages of good mechanical property and processing property, good oil resistance, wear resistance and chemical corrosion resistance, as well as heat resistance and low temperature resistance; by matching the tricresyl phosphate, the polychlorinated terphenyl and the magnesium hydroxide with sodium aluminum carbonate hydroxide for use, the fire-retardant property is enhanced; by adding the white jade powder, nano- tungsten boride and other fillers, high temperature resistance, wear resistance and other physical properties of the material are enhanced.

The invention discloses a preparation method of nano-magnesium hydroxide. The preparation method comprises the following steps: carrying out ultrasonic dispersion on ammonia water and a sodium hydroxide solution so as to obtain a mixed alkali solution, and adding the mixed alkali solution into a reactor; putting the reactor in an ultrasonic field, dropwise adding a polyethylene glycol 6000 water solution into the reactor in a constant speed, and further carrying out ultrasonic dispersion for 0.5-1 hour; dropwise adding a magnesium chloride water solution into the reactor in a constant speed; after the dropwise adding of the magnesium chloride water solution, further carrying out ultrasonic dispersion for 0.5 hour; adding turbid liquid obtained in the reaction into a hydrothermal reaction kettle for treatment, so as to obtain Mg(OH)2 precipitates; and carrying out suction filtration, washing, drying and grinding on the precipitates, so as to obtain nano-Mg(OH)2. Nano-magnesium hydroxide is prepared by virtue of an ultrasonic-hydrothermal coupling method, and reaction conditions are easily controlled, so that the problems that nano-Mg(OH)2 particles easily form colloid in a solution and are unlikely to be filtered are solved; and the particle size of the prepared nano-Mg(OH)2 particles is small, the particle size distribution is uniform, the crystallization degree is high, the technical flow of the preparation method is simplified, the energy consumption is reduced, and the production cost is saved.

A surface-treated steel sheet includes a steel sheet; and a plating layer which is formed on one surface or both surfaces of the steel sheet and which includes zinc and one of the group consisting of vanadium and zirconium, wherein the plating layer includes dendrite-shaped crystals including metallic zinc, and intercrystal filling regions which fill spaces between the dendrite-shaped crystals and show amorphous diffraction patterns when electron beam diffraction is carried out, wherein when the plating layer includes the vanadium, the intercrystal filling regions include a hydrated vanadium oxide or a vanadium hydroxide, and, wherein when the plating layer includes zirconium, the intercrystal filling regions include a hydrated zirconium oxide or a zirconium hydroxide.

The invention belongs to the technical field of plastic and discloses a shell plastic for computer display screens and a preparation method of the shell plastic. The shell plastic is prepared from, by weight, 35-40 parts of acrylonitrile-butadiene-styrene copolymer, 15-20 parts of polycarbonate, 8-10 parts of polyvinyl chloride, 6-8 parts of polytetrafluoroethylene, 3-5 parts of chlorinated polyethylene, 5-7 parts of silicon rubber, 3-5 parts of polybismaleimide, 5-8 parts of 2-hydroxy-4-octoxydiphenyl ketone, 4-6 parts of molybdenum disulfide, 8-12 parts of red phosphorus, 7-9 parts of melamine polyphosphate, 16-18 parts of calcium carbonate, 10-13 parts of magnesium hydroxide, 7-11 parts of a plasticizer, 2-4 parts of a lubricant, 1-2 parts of a stabilizer and 2-4 parts of an antistatic agent. The shell plastic is simple in preparation, excellent in physical performance and great in fire resistance and high temperature resistance.

The invention discloses an anti-corrosion power protection pipe which is characterized by being prepared from the following raw materials in parts by weight: 100-130 parts of polyvinyl chloride, 2-4 parts of magnesium hydroxide, 0.1-0.4 part of stearic acid, 6-10 parts of calcium carbonate, 0.2-0.5 part of sodium lignosulfonate, 1-2 parts of nano antimony trioxide, 0.5-1 part of sodium oleate, 0.4-1 part of a silane coupling agent kh550, 0.5-0.8 part of hexamethylphosphoramide, 1-2 parts of a quartz powder, 2-3 parts of wollastonite fiber, 1-2 parts of an anti-aging agent 4010, 2-3 parts of urea, and a proper amount of water. The added hexamethylphosphoramide, quartz powder, wollastonite fiber and urea are mixed under certain conditions, so that the dispersion, compatibility and the like of a filler in PVC are promoted to a great extent, corrosion resistance, aging resistance, flame retardancy, and high mechanical strength and toughness are also improved, and the service life of the anti-corrosion power protection pipe is prolonged.

The invention belongs to the field of lithium battery recycling and particularly relates to a method for recovering cobalt and nickel from a waste lithium battery. The method comprises the following steps of (1) crushing a positive plate of the lithium battery into powder particles; (2) adding the crushed particles to excessive first strong alkaline solution, stirring until no bubble is generatedand filtering; (3) adding sulfuric acid and hydrogen peroxide to a filter cake and filtering after reaction is ended; (4) heating filtrate in a nitrogen environment, adding the first strong alkaline solution and carrying out suction filtration after the reaction is ended; and (5) washing and drying the filter cake and then detecting the filter cake. Compared with an extraction-reverse extraction process, the method provided by the invention is simple in technological process, relatively low in equipment requirements and high in operability; and after obtained composite hydroxide is washed, thecontent of nickel and cobalt is greater than 50% and the content of manganese is smaller than 2%, so that separation of precious metals, namely the nickel and the cobalt from a low-valence metal manganese is achieved.

The invention discloses a refractory ceramic tile. The refractory ceramic tile comprises the following raw materials in parts by weight: 10-20 parts of modified asbestos powder, 15-25 parts of corundum sand, 7-13 parts of dolomite, 14-21 parts of perlite, 10-18 parts of modified quartz powder, 20-30 parts of bentonite, 15-25 parts of montmorillonite powder, 3-6 parts of mullite fibers, 4-9 parts of magnesium oxide, 2-4 parts of zirconium dioxide, 3-6 parts of nano aluminum hydroxide and 4-7 parts of a binding agent. According to the invention, the proportion among the raw materials are controlled, so that the prepared product is uniform in structure, good in mechanical property, excellent in thermal shock resistance and good in erosion resistance.

The invention provides a preparation method of picoxystrobin. The preparation method includes the following steps: reacting an alkali metal salt of 2-hydroxy-6-trifluoromethylpyridine with (E)-3-methoxy-2-(2-halomethylphenyl)-2-methyl acrylate in a solvent to obtain the picoxystrobin, wherein the alkali metal salt of the 2-hydroxy-6-trifluoromethylpyridine is prepared by a hydrolysis reaction of 2-halo-6-trifluoromethylpyridine and alkali metal hydroxide. The preparation method provided by the invention saves the use of an acid binding agent in a condensation step and avoids tedious steps suchas acidification and drying in the hydrolysis reaction. After two steps of separation, the total yield is over 82%, and the product content is 97%-98%. A by-product is only a single inorganic salt, which reduces the equipment cost of solvent recovery and saves the use of acid and alkali, thereby reducing the material cost. The preparation method is suitable for industrial production and can generate high economic benefit.

The invention belongs to the technical field of preparation of layered double hydroxide, and particularly relates to an auxiliary device for facilitating preparation of layered double hydroxide. According to the scheme, the auxiliary device comprises a box body, wherein a separating mechanism of a circular structure is arranged on the inner ring of the box body, an outer ring grinding plate of an annular structure fixedly connected with the inner side wall of the box body is installed at the top of the separating mechanism, an inner ring grinding assembly is installed on the inner ring of the outer ring grinding plate, and the outer ring of the top of the inner ring grinding assembly is slidably sleeved with an outer side isolation sleeve fixedly connected with the inner side wall of the top of the box body. According to the auxiliary device, the grinding precision of raw materials can be adjusted according to needs, the grinding plate can be rapidly cooled, heat generated by friction is discharged in the grinding process, the situation that the properties of the raw materials are damaged due to the fact that the temperature of the grinding plate is increased in the grinding process is avoided, meanwhile, the situation that the hardness of the grinding plate is reduced due to the fact that the grinding plate is annealed due to the temperature rise is avoided, the grinding effect is reduced, and the grinding efficiency and quality of the raw materials are improved.