9429 results about "Potassium hydroxide" patented technology

The invention provides a method for preparing lithium cobaltate by directly using an invalid lithium ion battery. The method comprises the following steps: crushing the invalid lithium ion battery or scraps generated when a lithium cobaltate battery is produced by a mechanical crusher at normal temperature; adding water and one or more of acetic acid, sulfuric acid, hydrochloric acid or nitric acid to produce mixed aqueous solution of the battery scraps and acid; filling the mixed aqueous solution into a hermetic pressure reactor, and controlling the temperature in the reactor to be between 50 and 150 DEG C; introducing or adding one leaching additive of sulfur dioxide or hydrogen, or adding hydrazine hydrate; stirring and leaching, cooling, and filtering; adding one precipitator of sodium carbonate, potassium carbonate and ammonium carbonate, or adding composite precipitator consisting of one of the sodium carbonate, the potassium carbonate and the ammonium carbonate and one of sodium hydroxide and potassium hydroxide to obtain mixture of lithium carbonate, cobalt carbonate and cobalt hydroxide; drying and calcining at high temperature to produce a lithium cobaltate product. The method is particularly suitable for the treatment scale of medium-sized and small enterprises, and is an effective method for directly materializing cobalt secondary resources.

A transistor includes a notched fin covered under a shallow trench isolation layer. One or more notch may be used, the size of which may vary along a lateral direction of the fin. In some embodiments, The notch is formed using anisotropic wet etching that is selective according to silicon orientation. Example wet etchants are tetramethylammonium hydroxide (TMAH) or potassium hydroxide (KOH).

A method and device for removing, deodorizing and purifying odor, smoke and harmful substances from exhaust gas or flue gas employs a water solution containing hypohalogen acid such as hypochlorous acid soda, an alkaline electrolyte such as potassium hydroxide or sodium hydroxide and a saline electrolyte such as sodium chloride, potassium chloride, sodium bromide or potassium bromide which is electrolyzed to produce an electrolytic water solution which is fed to a deodorizing tower and brought into contact with exhaust gas or flue gas to remove odor, smoke and harmful substances in the exhaust gas or flue gas.

Rare earth oxide material is dissolved in dense nitric acid, titrated with potassium hydroxide and made to pass through hydrothermal reaction at 100-250 deg.c inside one sealed container, so that monocrystal nanostring of RE hydroxide may be prepared. When the hydroxide is used as precursor, and through annealing at 400-500 deg.c, corresponding Re oxide nanostring may be prepared; and the hydroxide may be calcined at certain temperature to produce corresponding RE oxide nanopowder. When some other RE is doped, composite RE hydroxide, RE oxide nanostring or nanopowder may be prepared. The nanopowder has great specific surface area and the nanostring is anisotropic, so that they may find wide application in various fields.

A method for treating particulate biodegradable organic waste includes sizing the waste and adding a base prior to introducing the waste to a thermal hydrolysis reactor and hydrolyzing the waste at a temperature of about 130° C. or greater and a pressure greater than the saturated water vapor pressure to produce a slurry including solubilized organic material and residual solids. The solubilized organic material is separated from the residual solids using a liquid/solid separator and the solubilized organics are subjected to anaerobic digestion to produce a methane gas. The base is preferably potassium hydroxide (KOH) at a concentration of about 1%. The method may further include preheating the particulate biodegradable organic waste with latent heat of the separated solubilized organic material prior to thermal hydrolysis.

The invention discloses a method for preparing monopotassium phosphate by using wet-process phosphoric acid. The method comprises the following steps: reacting carbonyl diamide and wet-process phosphoric acid to obtain an intermediate; reacting the intermediate and potassium hydroxide to prepare a monopotassium phosphate product. The method has the advantages of short process route, low energy consumption, stable product quality, low production cost, convenience in operation and safety in production. A side product, namely, slurry can be recycled completely, an entire production process is environment-friendly, clean and free from pollution, and no waste gas, waste water or waste residues are discharged. A response is made to the policy calling of energy saving, emission reduction and clean production, the problems of complex process, instable product quality, high energy consumption and environmental pollution existing in the prior art are solved, and the purity of the obtained monopotassium phosphate product is more than or equal to 98 percent.

Water containing dissolved salts, such as calcium sulfate, calcium chloride, magnesium sulfate, magnesium chloride, sodium carbonate, sodium chloride, sodium sulfate, calcium bicarbonate, and mixtures thereof, is treated to reduce the concentration of those salts. About 0.1 to about 60 g/L of sodium hydroxide, sodium carbonate, potassium hydroxide, potassium carbonate, calcium hydroxide, calcium carbonate, aluminum hydroxide, aluminum sulfate, aluminum potassium sulfate, and mixtures thereof is added to the water, whereby a precipitate forms in the water. The precipitate is separated from said water and the water is desalinated using reverse osmosis, flash evaporation, or another method. The process is preferably performed by first adding calcium oxide or calcium hydroxide, separating the precipitate that forms, then adding sodium hydroxide and sodium carbonate to form a second precipitate.

The invention relates to a manufacture method for water solubility fertilizer containing humus acid. It includes the following steps: adding water and raw material, and KOH as extracting agent, keeping temperature at 50-60 degree centigrade, distilling for 1-2 hours, taking centrifuging, filtering potassium humate, exhausting residue, dissolving N, P, K, and B, dissolving complex agent and adding Ca, Mg, Cu, Fe, Zn, and Mn, heating to dissolving; mixing the materials gained from the above steps, grinding for 3-4 hours under the effect of emulsification pump.

The invention relates to a watery zinc-aluminium heavy-duty coating in a compounding squama shape and a preparation method thereof. The watery zinc-aluminium heavy-duty coating belongs to a bi-component coating and is prepared from organic-inorganic modified base stock and pigment according to a certain proportion by weight, wherein the organic-inorganic modified base stock contains silica sol, potassium hydroxide, silicone-acrylate emulsion, a pigment dispersing agent, a film forming addition agent and an antifoaming agent, and the balance is deionized water or distilled water; the pigment comprises squama-shaped zinc powder and squama-shaped aluminium powder; and the weight ratio of the organic-inorganic modified base stock to the pigment is 5: 1-2. The watery zinc-aluminium heavy-duty coating contains no chrome, can be solidified at the normal temperature, has environmental protection and low energy consumption and can be used for preparing thin coatings with high corrosion resistance, and the like.

The invention discloses a regeneration method of a lithium extraction system. The lithium extraction system is regenerated by virtue of alkaline saponification and the regeneration method comprises the following steps of mixing empty-loading organic phases subjected to lithium extraction and reverse extraction and alkaline liquor, saponifying and standing for separating phases to obtain a clarified and transparent regenerated and extracted organic phase, wherein the empty-loading organic phases comprise an extractant, a synergistic extractant and a diluent which are involved in the lithium extraction and reverse extraction processes; the synergistic extractant is iron chloride; and the alkaline liquor is any one of sodium hydroxide solution and potassium hydroxide solution. The regeneration method of the lithium extraction system disclosed by the invention has the advantages of simplicity in operation and good saponifying effect; when lithium is extracted by virtue of the saponified, regenerated and recycled extraction organic phase, the extraction efficiency of lithium is high and the extraction effect is good; and by the method, the recycling of the extraction organic phase for extracting lithium is achieved and the process flows of extracting, carrying out reverse extraction, regenerating and extracting for circularly extracting lithium are completed.

Cleaning compositions comprising (A) N-long-chain acyl neutral amino acid or a salt thereof, (B) N-long-chain acyl neutral amino acid dipeptide or a salt thereof, and (C) N-long-chain acyl neutral amino acid tripeptide or a salt thereof provide abundant foam, are excellent in foam retaining properties, and furnish a cleaned and dried body or hair with both a smooth feeling and a moist feeling. Compositions which further comprise (D) a higher fatty acid having 8 to 22 carbon atoms or a salt thereof exhibit enhanced creamy properties in foam quality. N-long-chain acyl neutral amino acids or salts thereof may be conveniently prepared by mixing a neutral amino acid, a long-chain fatty acid, and at least one of an alkaline substance selected from sodium hydroxide and potassium hydroxide, and maintaining the mixture with heating, while removing the water produced during the reaction, with no catalyst being employed.

The invention provides an environment-friendly silt curing agent, which is manufactured through the following steps: one or two among fly ash, calcium sulfate, sodium sulfate, sodium carbonate and potassium carbonate, one or two among slag, slag combination, potassium hydroxide, calcium oxide, sodium silicate or silicon dioxide, one or two among carbide slag, lime or gypsum, as well as one or two among triethanol amine surfactant, calcium lignosulfonate or sodium lignosulfonate form a plurality of optimal compound formulations according to respective attributes, are optimized, compounded, ground till the Brinell specific surface areas are between 300 and 900 m2/kg respectively and then mixed, wherein particle sizes are between 0.00040 and 0.5 mm. As a large amount of waste is utilized, the curing agent saves raw materials, solves the problems about waste discharge and environmental pollution, controls waste through waste, and has important significance to environmental protection. The invention aims to provide the environment-friendly silt curing agent which has strong adaptability to a plurality of types of silt and soil, is good in curing effect, good in durability after curing and capable of utilizing industrial waste, and can be widely applied to fill engineering, embanking or embankment reinforcement engineering, road engineering and other fields.

The present invention describes a process for converting vapor streams from sources containing at least one nitrogen-containing oxidizing agent therein to a liquid fertilizer composition comprising the steps of: a) directing a vapor stream containing at least one nitrogen-containing oxidizing agent to a first contact zone, b) contacting said vapor stream with water to form nitrogen oxide(s) from said at least one nitrogen-containing oxidizing agent, c) directing said acid(s) as a second stream to a second contact zone, d) exposing said second stream to hydrogen peroxide which is present within said second contact zone in a relative amount of at least 0.1% by weight of said second stream within said second contact zone to convert at least some of any nitrogen oxide species or ions other than in the nitrate form present within said second stream to nitrate ion, e) sampling said stream within said second contact zone to determine the relative amount of hydrogen peroxide within said second contact zone, f) adding hydrogen peroxide to said second contact zone when a level of hydrogen peroxide less than 0.1 % by weight in said second stream is determined by said sampling, g) adding a solution comprising potassium hydroxide to said second stream to maintain a pH between 6.0 and 11.0 within said second stream within said second contact zone to form a solution of potassium nitrate, and h) removing said solution of potassium nitrate from said second contact zone.

A polishing composition includes silicon dioxide, an alkaline compound, an anionic surfactant, and water. The silicon dioxide is, for example, colloidal silica, fumed silica, or precipitated silica. The alkaline compound is, for example, potassium hydroxide, sodium hydroxide, ammonia, tetramethylammonium hydroxide, piperazine anhydride, or piperazine hexahydrate. The anionic surfactant is at least one selected from a sulfonic acid surfactant, a carboxylic acid surfactant, and a sulfuric acid ester surfactant. The polishing composition can be suitably used in applications for polishing a silicon wafer.

An ink jet ink composition including from 40.0 to 99.0% by weight of water; from 0.1 to 20.0% by weight of a pigment dispersed with an oleoyl methyl taurine salt dispersant from 0 to 70.0% by weight of a water miscible co-solvent; and from 0.1 to 20.0% by weight of a water-reducible addition polymer; wherein the weight average molecular weight of the polymer is from 2,000 to 100,000; the acid number is from 50 to 400; and the acid group on the polymer is neutralized by an alkaline metal hydroxide such as lithium hydroxide, sodium hydroxide potassium hydroxide, or a mixture thereof; and wherein all weight percentages are based on the total weight of the ink composition. An ink jet printing method is also disclosed.

The invention relates to a preparation method of herbicide dicamba. The preparation method includes: (1) liquid potassium hydroxide and 2, 5-dichlorophenol are reacted according to molar ratio of 0.95:1-1:1 to obtain 2, 5-dichlorophenol potassium; (2) at the presence of anhydrous potassium carbonate and catalyst, the 2, 5-dichlorophenol potassium obtained in the step (1) is reacted with CO2 to generate 3, 6-dichlorosalicylic acid, pressure of CO2 is controlled to be 4-6MPa, reaction temperature ranges from 100 DEG C to 160 DEG C, and molar ratio of anhydrous potassium carbonate and 2, 5-dichlorophenol potassium is 1-2:1; and (3) in alkaline condition, at the temperature of 70-100 DEG C, the 3, 6-dichlorosalicylic acid obtained in the step (2) and chloromethane are reacted under the action of the catalyst through a tube fixed-bed reactor according to molar ratio 1:1-3.5, saponification and acidification are performed to obtain 3, 6-dichloro-2-methoxysalicylic acid, namely the dicamba. The process is high in reaction yield, simple in reaction condition, good in product quality, small in three wastes and low in energy consumption.

A composite Mn-Ce oxide catalyst for oxidizing the form-aldehyde into CO2 and H2O is prepared through adding soluble manganese nitrate in the solution of potassium permanganate and cerium ammonium nitrate while stirring, adding potassium hydroxide, stirring to obtain deposit, filtering, washing, drying at 80-120 deg.C and calcining.

The invention relates to a gel plugging agent for deep profile control of a higher temperature oil reservoir, and a preparation method of the gel plugging agent. The gel plugging agent comprises 0.3-0.8 percent of nonionic polyacrylamide, 0.6-1.3 percent of a cross-linking agent A, 0.45-1.44 percent of a cross-linking agent B, 0.02-0.04 percent of a temperature stabilizer and 0.01-0.08 percent of a pH value regulator, wherein the cross-linking agent A is methenamine; the cross-ling agent B is hydroquinone or resorcinol; the temperature stabilizer is sodium thiosulfate, sodium bisulfite or sodium sulfite; and the pH regulator is sodium hydroxide, potassium hydroxide, sodium carbonate or sodium bicarbonate. The gel plugging agent disclosed by the invention has strong temperature resisting performance and can be used for the profile control operation of the high temperature oil reservoir with 100-160DEG C; the gel plugging agent has the characteristics of high strength after being gelatinized, stronger plugging capability for the stratum and favorable thermal stability; and in addition, after the gel plugging agent is stood at the temperature of 130 DEG C for 90 days, the strength change is little and gel breaking and hydration are avoided.

The invention relates to a method for preparing aluminum-coated anode materials of lithium-ion batteries, which is characterized in that: firstly, soluble nickel salts, cobalt salts, and manganese salts are formulated into salt solutions, and then mixed with ammonia-water-mixed sodium hydroxide or potassium hydroxide solutions React to form precursor particles, wash and dry; add water to the dried precursor particles to prepare a flowable slurry, stir, and add trivalent aluminum salt solution and sodium hydroxide or potassium hydroxide solution dropwise to the slurry at the same time , to obtain the precursor of nickel hydroxide cobalt manganese coated with aluminum; then mix the precursor with lithium source, and then sinter to obtain the positive electrode material of lithium ion battery coated with aluminum. The present invention has the following obvious advantages: raw materials are easy to obtain; coated The process conditions are easy to control, and it is easy to obtain a relatively uniform coating body; the prepared positive electrode material can make the lithium ion battery have superior high temperature stability and better cycle characteristics.

The invention discloses a preparation method for a graphene/aramid fibre 1414 nano-fibre composite membrane, comprising the following steps of: performing nano-fibrillation on aramid fibre 1414 yarns via the solution system of dimethyl sulfoxide and potassium hydroxide; slowly adding dimethyl sulfoxide solution for oxidizing graphene, sequentially centrifuging, dispersing, performing suction filtration and film formation, and thus obtaining oxidized graphene/aramid fibre 1414 nano-fibre composite membrane; and reducing via hydroiodic acid, washing, drying, and thus obtaining the graphene/aramid fibre 1414 nano-fibre composite membrane. The tensile strength and the Young modulus of the graphene/aramid fibre 1414 nano-fibre composite membrane obtained by the preparation method disclosed by the invention can achieve 209.4 Mpa and 29.5 GPa respectively, thus showing excellent mechanical property; simultaneously, the conductivity of the graphene/aramid fibre 1414 nano-fibre composite membrane can achieve 175 S/m, thus being excellent in conductance; and a thermogravimetric analysis shows that the graphene/aramid fibre 1414 nano-fibre composite membrane is good in heat stability.