257 results about "Aluminum ammonium sulfate" patented technology

The invention provides a method for preparing aluminum oxide and other products from aluminiferous materials such as bauxite, high iron bauxite, alunite, kaoline, alumina, fly ash, coal gangue, aluminum ash, nepheline, clay and the like. The method comprises the following steps: (1) crushing, grinding and mixing the aluminiferous materials with ammonium sulfate and then roasting; (2) dissolving the roasted product (clinker aggregate) in water, and filtering to obtain aluminum ammonium sulfate solution and filter residues; (3) carrying out deferrization, aluminum deposition or recrystallization on the aluminium ammonum sulfate solution with ammonia to prepare aluminum oxide, and meanwhile, recycling the ammonium sulfate; (4) preparing silicon dioxide from the filter residues, and taking the remaining residues containing ferrum as the raw material for ironmaking. The method is suitable for treating various aluminiferous materials, has the advantages of simple technical process, simple equipment, no emission of solid, liquid and gas wastes, and no secondary pollution, and realizes the high-added-value green complex utilization of the aluminiferous materials such as bauxite, high ironbauxite, alunite, kaoline, alumina, fly ash, coal gangue, aluminum ash, nepheline, clay and the like.

The invention relates to the field of molecular biology and discloses a kit and a method for extracting microbial DNA. The kit comprises lysis solution, inhibitor removal solution and binding solution, wherein the lysis solution comprises 50 to 200mM of Tris-HCl, 50 to 150mM of EDTA, 0.5 to 3M of NaCl, 0.5 to 2 percent of CTAB, 0.5 to 2 percent of PVP and 0.5 to 2 percent of SDS; the inhibitor removal solution comprises 100 to 300mM potassium acetate, sodium acetate or ammonium acetate and 50 to 200mM aluminum sulfate, ammonium sulfate or aluminum ammonium sulfate; and the binding solution comprises 3 to 6M guanidine hydrochloride, 10 to 50mM Tris-HCl and 5 to 50 percent isopropanol. The kit and the method for extracting the microbial DNA have the advantages of high purity, high universality, high extraction speed, direct use for a downstream experiment, and application to extracting DNA from a microbe-containing sample.

The invention relates to a method for preparing aluminum oxide and other products by aluminum-containing materials of bauxite, alunite, nepheline, fly ash, kaolin, coal gangue and clay. The method comprises the following steps: (1) crushing and grinding an aluminum-containing material, carrying out mixing and baking for the treated aluminum-containing material and ammonium bisulfate; (2) carryingout dissolution and filtering for the baked clinker to obtain a crude ammonium aluminum sulfate solution and aluminum extracting residue; (3) carrying out an iron precipitating treatment for the ammonium aluminum sulfate solution with the concentration more than 1 g/L by adopting a jarosite method, then carrying out an iron precipitating treatment by a goethite method, carrying out an aluminum precipitating treatment for the resulting solution, carrying out calcination for the resulting aluminium hydroxide to prepare aluminum oxide; (4) carrying out an iron precipitating treatment for the ammonium aluminum sulfate solution with the concentration less than 1 g/L by adopting the goethite method, and carrying out an aluminum precipitating treatment to prepare aluminum oxide, or adopting a recrystallization method to carry out purification, adopting a reaction of the ammonium aluminum sulfate crystal and a ammonium carbonate solution to precipitate the aluminum to obtain ammonium aluminumcarbonate, carrying out calcination for the ammonium aluminum carbonate, and adopting a Bayer method to treat the calcined ammonium aluminum carbonate to prepare sandy aluminum oxide; (5) washing anddrying the aluminum extracting residue, wherein the dried aluminum extracting residue is adopted as the silicon dioxide product.

The invention relates to a method for extracting aluminum oxide from pulverized flue ash. The method comprises the following steps of: finely grinding the pulverized flue ash, and deironing; mixing the deironed pulverized flue ash and ammonium sulfate and then sintering to generate solid and ammonia gas; dissolving out the solid generated through sintering, then filtering or settling out, washing to obtain a solution containing aluminum ammonium sulfate; crystallizing the solution containing the aluminum ammonium sulfate to obtain solid aluminum ammonium sulfate; dissolving the solid aluminum ammonium sulfate, then preparing into a solution which reacts with the ammonia gas or ammonia water for 0.5-6h at a temperature of 20-50 DEG C to generate aluminum hydroxide and ammonium sulfate; roasting the aluminum hydroxide to obtain the aluminum oxide. The method for extracting the aluminum oxide from the pulverized flue ash is simple, ensures that less byproduct is produced and is easy to realize industrial application.

The invention discloses a cement-based capillary crystalline waterproof coating. A preparation method of the cement-based capillary crystalline waterproof coating comprises the steps of taking 630.8-748 parts of cement, 234.4-351.6 parts of quartz powder, 9.6-14.4 parts of methyl triethoxysilane, 8-12 parts of dehydrated ammonium aluminum sulfate, 240-350 parts of an emulsion binder, 192.7-289.5 parts of water, 96-144 parts of polyvinyl alcohol, 1.9-2.9 parts of an assistant and 2.4-3.6 parts of sodium methyl silicate; mixing the cement, the quartz powder, methyl triethoxysilane and dehydrated ammonium aluminum sulfate and stirring to obtain a powder material; mixing the emulsion binder, water, polyvinyl alcohol, the assistant and sodium methyl silicate and stirring to obtain a slurry; and mixing the powder material, the slurry and water according to a mass ratio of 6-6.5:4-4.5:4-4.5, and thus a cement-based capillary crystalline waterproof coating capable of being used instantly is obtained. The cement-based capillary crystalline waterproof coating can form a cement crystalline layer on building cement, so that self-waterproof cement concrete can be obtained.

The invention discloses a production method of high-purity aluminum oxide. The production method comprises the steps of preparing aluminum ammonium sulfate, recrystallizing the aluminum ammonium sulfate, producing high-purity aluminum oxide, collecting tail gas and regenerating ammonium sulfate, i.e., firstly preparing the aluminum ammonium sulfate from aluminum hydroxide and sulfuric acid; secondly, recrystallizing the aluminum ammonium sulfate to prepare high-purity aluminum ammonium sulfate; thirdly, implementing low-temperature dehydration and intermediate-temperature decomposition calcination to produce gamma-Al2O3; decomposing and removing all ammonia gas, sulfur trioxide and water vapour; finally, grinding the gamma-Al2O3, screening the ground gamma-Al2O3, molding and pressing the screened gamma-Al2O3 by a molding press, and sintering the gamma-Al2O3 by a high temperature furnace, thereby obtaining alpha-Al2O3. In the whole production process, the tail gas is collected effectively and the waste gas is recycled effectively. The production method of the high-purity aluminum oxide is simple in production technology, free from pollution and low in cost; and the purity of the high-purity aluminum oxide is easy to control.

The invention provides a flower preservative and a preparation method thereof.The flower preservative is prepared from, by weight, 2-8 parts of zinc gluconate, 2-6 parts of iron gluconate, 3-5 parts of sucrose, 1-5 parts of borax, 2-4 parts of aluminium potassium sulfate, 3-6 parts of aluminum ammonium sulfate, 1-5 parts of chitosan, 2-5 parts of chitin, 3-6 parts of magnesium sulfate, 1-4 parts of traditional Chinese medicine extracts, 2-5 parts of 6-benzyladenine, 1-4 parts of forchlorfenuron, 2-4 parts of gibberellins, 1-5 parts of 2,4-dichlorphenoxyacetic acid, 2-6 parts of salicylic acid, 3-8 parts of 8-hydroxyquinoline citrate, 1-6 parts of inositol hexaphosphate, 1-5 parts of ethylene glycol and 8-12 parts of deionized water.The flower preservative is simple to prepare and excellent in preservation effect.

The invention provides a method for precipitating vanadium from a high-aluminum vanadium-containing solution. The method comprises the following steps: carrying out extraction and back extraction on a vanadium-containing acidic leaching solution so as to obtain backwater, adding ammonium hydroxide into the backwater, stirring and crystallizing so as to separate out aluminum ammonium sulfate; adding low-valence vanadium ions oxidized by sodium chlorate into a tail liquid obtained during crystallization, adding the ammonium hydroxide into an oxidized liquid, stirring and precipitating the vanadium; and drying and calcining a red cake so as to obtain a refined vanadium product. According to the method, the problems of influences of impurities Al<3+> in the backwater on the vanadium precipitating rate and the purity of the refined vanadium are solved via a process of firstly crystallizing the aluminum ammonium sulfate and then precipitating the vanadium by fully aiming at the characteristic of high content of aluminum in the backwater obtained by precipitating the vanadium from stone coal type vanadium ores or vanadium-containing coal ash, and the byproduct aluminum ammonium sulfate is obtained at the same time. The method is low in running cost, high in vanadium precipitating rate and high in refined vanadium purity, and can be widely applied to industrial production.

The invention discloses an industrial waste water treatment agent. The industrial waste water treatment agent is mainly prepared from the following raw materials in parts by weight: 15-30 parts of aluminum sulfate, 15-30 parts of ferric sulfate, 1-5 parts of polyacrylamide, 1-5 parts of microorganisms, 15-30 parts of corn starch, 3-13 parts of chitosan, 7-17 parts of bentonite, 5-10 parts of sodium cellulose, 4-11 parts of montmorillonite powder, 20-40 parts of modified pelelith, 10-20 parts of calcium hydroxide, 10-20 parts of activated carbon, 5-15 parts of polymeric aluminum, 1-5 parts of aluminum ammonium sulfate, 3-7 parts of 3-chloro-2-hydroxypropyl-trimethylammonium chloride, 5-15 parts of barium sulfide and 5-20 parts of lignin. The manufacturing raw materials of the industrial waste water treatment agent are wide in source, pollutants in the waste water can be effectively removed, the sewage treatment is thorough, the treatment cost is low, and the treatment agent is non-toxic and pollution-free; the treated waste water satisfies the requirements of national sewage comprehensive discharge standard. Moreover, the preparation method of the industrial waste water treatment agent is simple and the industrial waste water treatment agent is convenient to produce.

The invention belongs to the technical field of concrete additives, and particularly relates to a concrete shrinkage compensating pumping agent. The concrete shrinkage compensating pumping agent is prepared from, by weight, 45-65 parts of polycarboxylate superplasticizer, 10-22 parts of aluminum ammonium sulfate, 6-14 parts of coco fatty acid diethanol amide, 2-8 parts of sepiolite, 5-13 parts of sodium citrate, 1-8 parts of sodium glucoheptonate, 1.2-2 parts of zinc stearate and 45-65 parts of water. The concrete shrinkage compensating pumping agent can compensate for concrete shrinkage and also can meet the pumping agent performance requirement and the pumping construction demand.

The invention relates to a method for cleanly extracting vanadium pentexide from a vanadium containing material. The method is characterized in that: the vanadium containing material is milled by the wet method, and then mixed with a certain weight amount of sulfuric acid, vanadic acid, water, sulfuric acid or phosphoric acid salt having certain association; under conditions of set temperature and set time, performing three-stage reflux leaching reaction of the mixture; adding ammonia sulfate and reducing iron powder to reaction leach solution in sequence to obtain aluminum ammonium sulfate crystals and ammonium ferrous sulfate crystals respectively; adding sulfuric acid to the solution in which aluminum and iron are separated out, cooling the solution for crystallization to obtain vanadium sulfate acyl crystals, and returning the mother liquor to extract vanadium ores; performing the neutralization reaction of the vanadium sulfate acyl crystals and ammonia water to obtain a precipitate of vanadium hydroxide, and returning the solution of ammonia sulfate to precipitate the aluminum and iron; and calcining the vanadium hydroxide and oxygen gas at a high temperature of over 300 DEG C to obtain the vanadium pentexide. The method has the advantages of short process flow, less energy consumption, high vanadium yield, low production cost, environmental protection, and comprehensive utilization of valuable metallic elements in ores.

The invention discloses a textile fabric coloring agent. The textile fabric coloring agent is prepared from the following raw materials in parts by weight: 8 to 12 parts of cobaltous sulfate, 7 to 10 parts of aluminum ammonium sulfate, 3 to 7 parts of butyl methacrylate, 2 to 5 parts of ethyl acetate, 3 to 6 parts of trimethylolpropane, 7 to 9 parts of camphor tree leaf extract liquor, 6 to 8 parts of ferrous sulfate, 5 to 10 parts of aluminum sulfate, 3 to 7 parts of glycerol, 2.5 to 3.2 parts of hydroxypropyl methyl cellulose, 1 to 4 parts of imidazoline, 1.2 to 2.4 parts of 2-naphthol and 12 to 26 parts of modified starch. The textile fabric coloring agent has the beneficial effects of high colorability, prevention of fading, bright color and harmlessness to human bodies.

The invention discloses an application of AlNH4(SO4)2.12H2O in the preparation of antitumor matrix metal protease inhibitors. Compared with previous MMPs inhibitors, the AlNH4(SO4)2.12H2O disclosed in the invention has the advantages of strong inhibition activity to the MMPs, simple structure, low price and convenient obtaining.

The invention relates to a method for preparing high-pure aluminum oxide. The method comprises the following steps: organic acids such as ammonium sulfate and tartaric acid are added in purified industrial aluminum sulfate to remove iron, so as to obtain an aluminum ammonium sulfate solution; the aluminum ammonium sulfate is reacted with refined hydrochloric acid; the obtained crystal is washed, dried, fired and milled, and finally the high-pure aluminum oxide is obtained. The method is simple in production technology; and the obtained aluminum oxide has high purity which can reach 99.999% even 99.9999 spectrum purity.

The invention discloses a method for preparing hollow aluminum oxide microspheres, which relates to material technology. The method comprises the following steps of: a) placing analytically pure aluminum ammonium sulfate [(NH4)2Al2(SO4)4.24H2O] into a flour mill for milling, and sieving the milled aluminum ammonium sulfate with a sieve of 800 meshes for later use; b) preheating a vacuum sintering furnace; c) filling the aluminum ammonium sulfate powder obtained by the milling into an atomizer for atomization; d) blowing the atomized aluminum ammonium sulfate powder into the vacuum sintering furnace by using compressed air; e) maintaining the temperature in the vacuum sintering furnace to be over 1,000 DEG C, keeping the air pressure in the vacuum sintering furnace lower than the atmospheric pressure, vigorously decomposing the aluminum ammonium sulfate powder to form porous aluminum oxide powder which falls under the action of gravity, exhausting produced gases by an exhaust pump, and arranging a filter screen of 12,500 meshes at the front end of an inlet pipe of the exhaust pump to prevent the solid powder from being sucked in; and f) keeping the temperature for 1 hour when the temperature in the vacuum sintering furnace is 1,000 DEG C so as to sinter the porous powder into hollow ceramic microspheres, stopping heating, injecting air into the vacuum sintering furnace and obtaining the hollow aluminum oxide microspheres when the temperature is reduced to the room temperature. The method of the invention has the advantages of simple and reliable process, low cost and high yield.

The present invention discloses a production process of high-purity superfine alpha-aluminum oxide powder. Refined ammonium bicarbonate and aluminum ammonium sulfate is first mixed with pure water toprepare solution, refined ammonia water is added into the solution of ammonium bicarbonate to produce micro reaction, and the product is filtered, washed and sintered in tunnel kiln. The said production process can result in alpha-Al2O3 content up to 99.99, D50 granularity of 0.1-5 microns, BET specific surface area of 2-20 sq m/g, true density of 3.80-3.97 g/cu cm bulk density of 0.3-0.5 g/cu cm, densified density of 0.6-1.3 g/cu cm, sintered density of 3.92-3.96 g/cu cm and alpha-Al2O3 phase converting rate greater than 95%.

The invention relates to the technical field of silicon-aluminum-phosphate molecular sieve recycling, and particularly discloses a method for preparing aluminium oxide and phosphorus-containing fertilizer from a methanol-to-olefin waste catalyst. The method comprises the following steps: calcining and decomposing the waste catalyst, and then recovering by adopting an aluminum ammonium sulfate decomposing method to obtain the high-purity aluminium oxide, and performing acidolysis and curing to obtain a silicon-phosphorus-nitrogen compound fertilizer. The method disclosed by the invention is simple in processing steps, is stable and controllable in process, is high in operability, can prepare high-purity Al2O3 of which the purity is higher than 99% and the silicon-phosphorus-nitrogen compound fertilizer of which the content of effective nutrients is larger than 30% synchronously, realizes the recycling of the methanol-to-olefin waste catalyst, reduces the pollution of the waste catalystto the environment, and has great significance for developing coal chemical industry in China.

The invention discloses a novel compound emulsifier for a food. The novel compound emulsifier comprises the following components in parts by weight: 20-40 parts of glycerin monostearate, 30-50 parts of sucrose fatty acid ester, 10-30 parts of propylene fatty acid ester, 4-10 parts of calcium stearoyl lactylate, 20-40 parts of wheat germ powder, 2-6 parts of ascorbic acid, 2-6 parts of sorbitol, 10-20 parts of tween-60, 2-8 parts of aluminum ammonium sulfate and 3-9 parts of sodium bicarbonate. The novel compound emulsifier has a good emulsifying effect, a making process of the food is simplified and the making cost of the food is reduced.

The invention discloses a preparation method of high-purity aluminum oxide. The preparation method comprises the following steps of: with industrial Al2(SO4)3.18H2O and (NH4)2SO4 solids as raw materials, preparing an aluminum ammonium sulfate crystal by utilizing a recrystallization method; adding ammonia water to the obtained aluminum ammonium sulfate crystal to obtain an aluminum hydroxide gel; purifying with an aluminum-type mixed resin to obtain a high-purity aluminum hydroxide gel; distilling the obtained aluminum hydroxide gel at reduced pressure to obtain aluminum hydroxide colloidal particles; roasting the aluminum hydroxide colloidal particles for 1 to 2 hours at 1,000 to 1,200 DEG C through a muffle so as to obtain aluminum oxide powder. According to the preparation method, the aluminum ammonium sulfate crystal is prepared by utilizing the recrystallization method, so that the crystal has less impurity; and the prepared aluminum hydroxide sol is purified by the ion exchange resin to obtain the high-purity aluminum hydroxide gel, and then the high-purity aluminum hydroxide gel is roasted to obtain the aluminum oxide which is high in purity.

The invention discloses a coprecipitation-carbothermic reduction method for preparing aluminum nitride powder, belonging to the field of ceramic powder preparation. An aluminum source is aluminum ammonium sulfate, a carbon source is carbon black, and precipitation is ammonium bicarbonate. The aluminum source and the carbon source are proportioned according to molar ratio; and the precipitation and the aluminum source are proportioned according to molar ratio. The preparation method comprises the following steps of: firstly, respectively solving the ammonium bicarbonate and the aluminum ammonium sulfate in a proper amount of deionized water, and then adding the carbon black to the aqueous solution of aluminum ammonium sulfate and stirring uniformly to obtain a mixed solution of the aluminum ammonium sulfate and the carbon black; mixing the mixed solution of the aluminum ammonium sulfate and the carbon black with the solution of ammonium bicarbonate uniformly to obtain uniform precipitation of the aluminum source and the carbon black, discharging water from the prepared precipitation of the aluminum source and the carbon black through a piece of filter cloth and drying to obtain a precursor; and reacting the precursor under a certain condition, carrying out subsequent decarbonization treatment on reaction products to obtain the aluminum nitride powder. The invention is beneficial to the synthesis of high-purity and fine-grain nanometer-level aluminum nitride ceramic powder under lower reaction temperature condition; in addition, the invention has simple device, strong process controllability and reliability and low production cost, and is suitable for the industrialized production.