99 results about "Bisulfate salt" patented technology

An animal litter, process for preparing the animal litter, and a method for removal of animal waste using the animal litter are provided. The animal litter generally includes at least one sorbent and a sulfate such as sodium bisulfate. The animal litter is in the form of discrete plural particles which tend to agglomerate when wetted.

An animal litter, process for preparing the animal litter, and a method for removal of animal waste using the animal litter are provided. The animal litter generally includes at least one sorbent and a sulfate such as sodium bisulfate. The animal litter is in the form of discrete plural particles which tend to agglomerate when wetted.

The invention belongs to the technical field of fine chemical organic synthesis, and discloses a synthesis method of 1, 3-propane sultone without generation of three wastes. The synthesis method comprises the following steps: by taking allyl alcohol, sulfite and hydrosulfite as raw materials, generating 3-hydroxy propanesulfonate; then removing part of water, adding a solvent A to separate out sulfite, filtering, and adding sulfuric acid into filtrate for acidification; and adding a solvent B to separate out sulfate, filtering and separating out the sulfate, and adding a dehydrating agent to carry out dehydration cyclization reaction to prepare the 1, 3-propane sultone. According to the synthesis method provided by the invention, a 1, 3-propane sultone product with the yield not lower than 95% and the purity reaching 99.9% or above and a sulfate byproduct with the purity reaching 99.6% or above can be obtained; no waste gas, waste solid or waste water is generated in the reaction process, the catalyst sulfite can be repeatedly used, and the used solvent is easy to recover and can be repeatedly used.

The invention belongs to the technical field of synthetic ester, and particularly relates to a preparation method of fatty acid pentaerythritol ester base oil, which comprises the following steps: carrying out esterification reaction on pentaerythritol and fatty acid in the presence of a catalyst and a color retention agent, and carrying out post-treatment to obtain the fatty acid pentaerythritol ester base oil, the catalyst comprises at least one of stannous octoate, stannous oxalate, stannous oxide, tetrabutyl titanate, isopropyl titanate and sodium hydrogen sulfate; the color retention agent comprises at least one of sodium hypophosphite, hypophosphorous acid, activated carbon and sodium sulfite. The color retention agent sodium hypophosphite is matched with the specific catalyst such as stannous oxalate, so that the petroleum color number of the produced fatty acid pentaerythritol ester base oil is smaller, and meanwhile, the esterification reaction time is shorter.

The invention discloses a composite browning liquid for a printed circuit board and a preparation method of the composite browning liquid. The composite browning liquid comprises the following components: 60-85 g / L of 98 wt% concentrated sulfuric acid, 12-20 g / L of 30 wt% hydrogen peroxide, 1-2 g / L of a modified corrosion inhibitor, 8-14 g / L of a silane coupling agent, 1.5-3 g / L of 1-butyl-3-methylimidazolium hydrogen sulfate, 4-8 g / L of an impregnating compound, 5-8 g / L of a dispersing agent and the balance of deionized water. The modified corrosion inhibitor prepared by a specific method, the silane coupling agent, the ionic liquid and the compound surfactant are scientifically compounded, so that the copper surface treatment effect is remarkably improved, and the inherent contradiction between binding force improvement and over-etching prevention of a traditional browning liquid is solved; the browning liquid has the advantages of stable treatment effect, long service life, reduction of waste liquid output and the like, and is suitable for industrial production requirements of high-density printed circuit boards.

The invention discloses a tetrahydrocarbazole enhanced fluorescent probe for detecting hydrosulfite as well as a preparation method and application of the tetrahydrocarbazole enhanced fluorescent probe. The fluorescent probe is a 2-(2-(5-(2, 2-dimethyl-2, 3, 4, 9-tetrahydro-1H-1, 3-methyl carbazole-6-yl) furan-2-yl) vinyl)-3-ethyl benzothiazole-3-onium iodised salt compound, namely, TC-FV-BT, and the fluorescent probe can be applied to the field of fluorescence detection. The probe TC-FV-BT can be used for specifically recognizing the hydrosulfite. Under sunlight, after bisulfite is added into a DMF / H2O (2: 8, v / v) solution of the probe TC-FV-BT, the color of the solution is changed from dark pink to white, under irradiation of ultraviolet light with the wavelength of 365 nm, the solution emits orange fluorescence at the emission wavelength of 605 nm, the fluorescence color of the solution is changed from colorless to orange, the response time is 4 min, the detection limit of the bisulfite reaches 77.27 nM, and the detection limit of the bisulfite reaches 77.27 nM. The fluorescent probe shows good selectivity and anti-interference performance, and has a good application prospect in the fields of environmental analysis, food and the like as a fluorescent probe for detecting hydrosulfite.

The invention provides a reverse osmosis reducing agent and a preparation method and application thereof, and belongs to the technical field of reverse osmosis water treatment.The reverse osmosis reducing agent comprises a first reducing agent, a second reducing agent and a solvent; the first reducing agent is thiosulfate, and the second reducing agent is sulfite and / or bisulfite; the mass ratio of the first reducing agent to the second reducing agent is (1: 18)-(10: 1). The reverse osmosis reducing agent can be applied to reverse osmosis water treatment, the reverse osmosis reducing agent is added into reverse osmosis inlet water to be treated, and the reverse osmosis inlet water subjected to reduction treatment can be obtained after full reaction. The first reducing agent and the second reducing agent are compounded according to the specific mass ratio, so that the compounded reverse osmosis reducing agent can effectively inhibit the occurrence of advanced oxidation chain reaction while keeping high reducibility, and effective reduction of reverse osmosis inlet water can be realized by using a small amount of the reverse osmosis reducing agent.

The application discloses a preparation and by-product recycling process of acesulfame potassium, and belongs to the technical field of food additive production and processing. Amino sulfonic acid is added into N-butyl pyridine hydrogen sulfate ionic liquid and triethylamine in batches to obtain a homogeneous mixed solution; secondly, the mixed solution and diketene are introduced into a micro-channel reactor to perform a condensation reaction; and the discharge liquid is introduced into a polystyrene sulfonic acid resin loaded SO3 fixed bed reactor to perform a cyclization reaction; subsequently, the cyclization product is subjected to hydrolysis, decolorization, potassium salt crystallization and drying to obtain the acesulfame potassium product; and the crystallization mother liquor is separated through a nanofiltration membrane, and the intercepted liquid is an ionic liquid and triethylamine mixture, which is directly reused. The application inhibits the self-polymerization of diketene through the micro-channel reactor, replaces concentrated sulfuric acid with solid acid to avoid waste acid pollution, and realizes efficient recycling of by-products by combining nanofiltration membrane separation and catalytic depolymerization technology, and has the characteristics of green environmental protection and economic efficiency.

The application relates to the technical field of waste resource utilization and environment functional material preparation, and specifically discloses a preparation method of a manganese oxide loaded copper residue based persulfate hydrogen salt activator. The activator is prepared by taking copper pyrogenic smelting waste residue as a main carrier, taking manganese sulfate monohydrate as a manganese source, and additionally taking ammonium chloride and ammonia water. The preparation method comprises the following steps: grinding the copper residue, mixing and dispersing the copper residue with a precursor solution, carrying out intermittent ultrasonic assisted high-energy ball milling, in-situ precipitation, gradient flow aeration oxidation, magnetic sedimentation washing and vacuum low-temperature drying to obtain the finished product. The activator can be used for degrading tetracycline, phenol and bisphenol A type refractory organic wastewater. The active component is firmly combined with the carrier, the catalytic activity is high, the recycling stability is good, and the heavy metal leaching amount is low. The preparation method is simple in process and mild in condition, realizes high-value utilization of copper residue solid waste, is low in preparation cost, and is easy to realize large-scale production.

The present invention provides a porous hard carbon negative electrode material and its preparation method and sodium ion battery, relating to the technical field of sodium ion batteries; the preparation method comprises the following steps: a template, a hard carbon precursor, an activator and 1-ethyl-3-methylimidazole hydrogen sulfate are evenly ground to obtain a mixture; the mixture is heated to 700-900°C in an inert gas atmosphere to obtain a carbonized material; the carbonized material is subjected to secondary pore formation to obtain a porous carbonized material; the porous carbonized material is washed and dried, and then immersed in a polyoxometalate sodium salt solution to obtain a soaked material; the soaked material is washed and dried, and the dried material is heated to 1200-1400°C in an inert gas atmosphere to obtain a porous hard carbon negative electrode material. The present invention introduces active sites into the porous carbon material during the carbonization process, and then introduces polyoxometalate sodium salt on the active sites. The polyoxometalate skeleton in the polyoxometalate sodium salt can allow sodium ions to be transmitted in its micropores, thereby improving the gram capacity and coulombic efficiency of the material.

An animal litter, process for preparing the animal litter, and a method for removal of animal waste using the animal litter are provided. The animal litter generally includes at least one sorbent and a sulfate such as sodium bisulfate. The animal litter is in the form of discrete plural particles which tend to agglomerate when wetted.

The invention belongs to the technical field of etching, surface brightening or acid pickling compositions, and particularly relates to ITO-Ag-ITO etching liquid as well as a preparation method and application thereof. Comprising the following components in percentage by mass: 15-30% of tartaric acid, 8-20% of sulfocarboxylic acid, 5-15% of disulfate, 3-10% of nitric acid, 2-6% of a sugar alcohol compound, 0.1-5% of polyether amine, 0.01-1% of a corrosion inhibitor and the balance of water. All the components interact with one another, so that the etching selectivity is adjusted, etching is uniform, and undesirable phenomena such as partial falling, black spots, dark spots or short circuits of the Ag film layer are reduced; the activity of the etching liquid to Al is reduced, and Al lateral erosion is not caused; and through multiple mechanisms of complexation-dispersion-adsorption, the reduction reaction of Ag < + > is inhibited, silver particle residues after etching and precipitation in areas such as Al are reduced, the pattern precision is greatly improved, and the product yield in the OLED manufacturing process is remarkably improved. The problems of ITO and Ag etching difference, silver residue, silver precipitation and metal Al corrosion in the prior art are solved.

The present invention relates to an etching solution composition for a silver (Ag)-containing metal film, which contains (A) nitric acid, (B) an organic acid containing a plurality of carboxyl groups, (C) an organic acid containing one carboxyl group, (D) a bisulfate, (E) a nitrate, (F) an aliphatic sulfonic acid, (G) an aromatic sulfonic acid, and (H) water, and which has a concave-convex residue control index (J) of 0.5-1.2, and a method for forming a metal pattern using the same. Thus, no silver (Ag) residue is left in the recessed portion of the etched pattern, and the recrystallization of the solid content of the etching liquid composition can be prevented.

The invention discloses a method for preparing chromic anhydride from a sodium chromate neutral solution, which comprises the following steps: transferring the sodium chromate neutral solution into a storage tank of an anode head tank by using a pump, adjusting the temperature, transferring a sodium hydroxide solution into a storage tank of a cathode head tank, and adjusting the temperature; overflowing the sodium chromate neutral solution after temperature regulation to an anode chamber of an electrolytic bath and then overflowing to an anode circulating tank, and overflowing the sodium hydroxide solution after temperature regulation to a cathode chamber of the electrolytic bath and then overflowing to a cathode circulating tank; electrifying a cathode plate and an anode plate of the electrolytic bath with direct current to start electrolysis; pumping out an anode solution after electrolysis, adding the anode solution into a reaction kettle after evaporation, adding concentrated sulfuric acid, heating and dehydrating, and standing in a clarifier until layering; the upper layer is sodium hydrogen sulfate, and the lower layer is chromic anhydride liquid, cooling and flaking to obtain the high-quality chromic anhydride. The method can effectively shorten the production period, greatly improve the production yield, reduce the labor intensity of workers, avoid high cost of an electrolytic method and avoid a large amount of byproduct chromium-containing sodium hydrogen sulfate of a sulfuric acid method, and is economical and practical.

The invention discloses a continuous preparation method of ethylene glycol dimethacrylate, and aims to provide a continuous preparation method of ethylene glycol dimethacrylate, which is high in reaction rate and high in product yield, and is characterized in that methacrylic acid and ethylene glycol are used as raw materials, and continuous production is realized through reactive distillation; the technical scheme comprises the following steps; the method comprises the following steps: 1, filling a reactive distillation tower with a filler, putting methacrylic acid, ethylene glycol, a polymerization inhibitor and sodium hydrogen sulfate into a feeding tank, and uniformly stirring to obtain a reaction raw material; 2, turning on a main power supply, starting a reaction control system, starting a cyclic heating device, and controlling the temperature of the rectifying column to be 100-120 DEG C; starting a circulating condensing device, and controlling the temperature of condensed water to be 0-10 DEG C; 3, starting a peristaltic pump to pump the reaction raw materials in the feeding tank into the reaction rectifying tower, starting an air pump to introduce air, collecting condensate water at the top of the rectifying tower at the beginning of reaction, and obtaining a crude ethylene glycol dimethacrylate product at the bottom of the rectifying tower; and 4, timely transferring water and methacrylic acid collected at the tower top to a tower top liquid storage tank through a pipeline, and timely transferring an ethylene glycol dimethacrylate crude product collected at a tower kettle to an ethylene glycol dimethacrylate crude product storage tank through a pipeline.

This invention relates to the field of lithium-ion battery technology, specifically to a method for recycling aluminum metal from high-aluminum cathode material black powder in waste lithium batteries. The method includes: dry mixing the black powder with anhydrous sodium sulfate, acidifying with concentrated sulfuric acid, spraying with an aqueous sodium sulfate solution and adding sodium bisulfate monohydrate to obtain a pretreated material; after staged acidification and roasting, lithium is extracted by water leaching; the water leaching residue is leached under low-acid conditions; the low-acid leachate is precipitated with sodium fluoride to obtain cryolite; the post-aluminum precipitate is then treated with iron removal and pH adjustment to prepare a nickel-cobalt-manganese extraction pre-liquid. This invention, by controlling the distribution of sulfate ions on the aluminum surface and staged roasting, reduces the gas production and aluminum load during low-acid leaching, combined with the directional precipitation of aluminum using low-pH cryolite. This achieves efficient lithium recovery while significantly reducing the loss of nickel, cobalt, and manganese with the aluminum slag. Aluminum is recovered in the form of cryolite for high-value recovery, greatly improving resource utilization and process safety.

This invention provides a method for recovering lithium from lithium-containing aluminum electrolyte waste, relating to the field of lithium-containing waste resource utilization. The lithium-containing aluminum electrolyte waste is mixed with a calcium-containing substance and roasted. The calcium-containing substance includes a first calcium-containing substance and a second calcium-containing substance. The first calcium-containing substance is at least one selected from calcium sulfate, calcium bisulfate, calcium carbonate, or calcium bicarbonate. The second calcium-containing substance is at least one selected from calcium carbonate, bicarbonate, sulfate, bisulfate, hydroxide, oxide, or chloride. The molar ratio of calcium in the calcium-containing substance to aluminum in the lithium-containing aluminum electrolyte is controlled at 1-4:1. The molar amount of calcium in the carbonate, bicarbonate, sulfate, and bisulfate is 40%-80% of the total molar amount of calcium in the calcium-containing substance. After roasting, the roasted clinker is mixed with an acidic leachate for lithium extraction. This method significantly improves the lithium leaching rate and effectively and selectively recovers high-value lithium from lithium-containing aluminum electrolytes.

The application discloses a preparation method of high-purity fluorescein sodium. The fluorescein is synthesized from o-phthalic anhydride and resorcinol under the catalysis of sodium bisulfate or potassium bisulfate without using an organic solvent as a solvent, and then the fluorescein is used to prepare fluorescein diacetate; and the high-purity fluorescein sodium is obtained through a synthesis route of saponification, acidification and salt formation. The synthesis route has mild reaction conditions, simple operation steps, no organic solvent, avoids the generation of organic solvent pollution, has low raw material and auxiliary material consumption, low production cost, high purity of reactants and high yield.

The application belongs to the field of aquaculture, and particularly relates to an ammonia-nitrogen removing agent for aquaculture and a preparation method thereof. The ammonia-nitrogen removing agent is composed of the following components in parts by weight: organic chlorine 8-10 parts, peroxide 6-8 parts, oxygen supplier 0.2-0.5 parts, catalyst 0.5-1 part, pH regulator 2 parts, and stabilizer 4-5 parts. The organic chlorine is sodium dichloroisocyanurate and cyanuric chloride, or cyanuric chloride. The catalyst is ferrocene. The pH regulator is sodium bisulfate and phosphate, or phosphate. The stabilizer is anhydrous sodium sulfate and anhydrous magnesium sulfate, or anhydrous sodium sulfate and anhydrous magnesium chloride. The application slowly releases hypochlorous acid through organic precursors, and degrades ammonia-nitrogen in water by combining with the ammonium magnesium phosphate method, so that the concentration is controllable and the effective period is long. While the ammonia-nitrogen removing agent of the application efficiently degrades ammonia-nitrogen, the problem of excessively high initial effective chlorine concentration is avoided, and the safety and stability of the treatment process are significantly improved.

A method for the continuous manufacture of taurine, comprising at least one of (a) – (c): (a) reacting an ethylene oxide and an alkali metal bisulfite to obtain a first intermediate product stream comprising an alkali metal isethionate; (b) reacting the alkali metal isethionate from the first intermediate product stream with ammonia to obtain a second intermediate product stream comprising an alkali metal taurate; and (c) converting the alkali metal taurate from the second intermediate product stream to obtain taurine and at least one by-product, wherein the by- product is suitable for reacting sulfur dioxide to alkali metal bisulfite, and separating the at least one by-product from the taurine to obtain at least one by-product stream comprising the at least one by-product and a product stream comprising the taurine; and an apparatus for the continuous manufacture of taurine.

This application provides a method for recycling lithium-aluminum-silicon glass waste, relating to the field of solid waste resource utilization. The method includes: mixing lithium-aluminum-silicon glass waste powder with additives, calcining to obtain a calcined material, wherein the additives include sodium and calcium salts, the sodium salt including at least one of sodium sulfate and sodium bisulfate, and the calcium salt including at least one of calcium sulfate and calcium bisulfate. The molar amount of calcium in the additives is more than 0.4 times the molar amount of aluminum in the lithium-aluminum-silicon glass waste, and the molar amount of sodium is more than 0.9 times the molar amount of aluminum in the lithium-aluminum-silicon glass waste. The calcined material is then mixed with a leaching agent for leaching. The lithium-containing leaching solution of this application contains few types and amounts of impurities, and high-purity lithium compounds can be prepared after simple impurity removal treatment. This enables efficient recovery and reuse of valuable elements in low-value lithium-aluminum-silicon glass waste, solving the environmental pollution problem caused by glass waste stockpiling and reducing space occupation.

Disclosed herein is a method for preparation of a disinfectant formulation, the method comprising steps of obtaining a chlorine dioxide (CIO2) solution by adding a predetermined quantity of sodium chlorite with a predetermined quantity of sodium bisulfate in a first container filled with water, keeping the first container closed for a predetermined period of time, dissolving a predetermined quantity of peracetic acid (PAA) in water in a second container, adding a predetermined quantity of benzalkonium chloride (BAC) to the solution in the second container, and mixing and stirring the solutions of the first and second container to obtain a disinfectant solution.

The present invention provides an improved low-pH fabric care composition that provides freshness and odor prevention effects even after the fabric has been washed, i.e., during storage and use of the fabric. [Solution] A liquid fabric care composition comprising an organic acid and / or a salt thereof, a Bacillus spore, an aromatic material including an aldehyde-based fragrance raw material, and water, wherein the composition comprises less than 10% by weight of the composition, selected from the group consisting of cleaning surfactants, bleaching agents, fabric softening materials and mixtures thereof, the composition has a stock pH of about 2 to about 4, the composition is added during the rinse cycle of a laundry process, and the composition comprises 0.001% to 1.0% by weight of a sulfur-containing compound selected from sulfate compounds, bisulfate compounds or combinations thereof.

This invention proposes a method for recycling waste lithium titanate anode materials, comprising the following steps: S1: The recycled lithium titanate anode material is calcined once, and the resulting calcined material is mixed with a mixture containing an acidic salt and an additive under pressure. After the reaction, solid-liquid separation is performed to obtain a lithium extraction solution and a leaching residue; wherein, the acidic salt is at least one of a hydrogen sulfate or an ammonium salt; the additive is at least one of barium chloride or calcium chloride; the reaction pressure is 0.3~0.6 MPa. After pressurized selective leaching of the lithium titanate anode material, the lithium extraction solution can be purified to obtain battery-grade lithium carbonate products, and the leaching residue can be used to prepare high-value-added titanium-based adsorbent precursors.

The present invention relates to a stabilizing composition having significantly improved shelf stability. More specifically, the present invention relates to a stable liquid aqueous pharmaceutical composition comprising cytisine or a pharmaceutically acceptable salt thereof, at least one antioxidant selected from the group consisting of sulfite, bisulfite and pyrosulfite compounds. The invention also relates to the use of at least one antioxidant selected from the group consisting of sulfite, bisulfite and pyrosulfite compounds for the stabilization of a liquid aqueous pharmaceutical composition comprising cytisine.

Disclosed is a synthetic method of sulfamerazine, relating to the technical field of drug preparation. Acetone and methyl formate are used as initial raw materials, and subjected to condensation reaction to obtain a compound 2; the compound 2 is subjected to addition reaction in a medium of methyl hydrogen sulfate to obtain a compound 3; the compound 3 is subjected to cyclization reaction in a medium of sulfaguanidine to obtain a compound 4; and the compound 4 is subjected to acidification in an acidic medium to obtain the sulfamerazine.

The present application belongs to the field of medicine and chemical industry, and relates to a method for purifying losartan. In the method, bisulfite or sulfite is used to remove color impurities of losartan, and the method has the advantages of mild treatment condition, short operation period, high decolorization efficiency and suitability for industrial production.

The invention discloses a waste liquid treatment method for preparing O-methylisourea hydrogen sulfate by a urea method, which aims at overcoming the defects of an organic acid-containing waste liquid treatment method which is high in organic matter content, low in moisture content, high in acid content, high in temperature and explosive, adopts a combined treatment method of alkali and a dispersing agent, and gasifies the dispersing agent through heat generated in a neutralization process; according to the present invention, the heat in the whole reaction process is removed so as to ensure the safety of the reaction process, and the presence of the dispersant reduces the viscosity of the system, simplifies the by-product preparation steps, improves the by-product quality, has advantages of high resource utilization rate, low equipment requirement, low waste liquid component requirement, and effective hazardous waste amount reduction; meanwhile, the dispersing agent can be repeatedly used, the treatment method is simple, the treatment time is short, the treatment efficiency is high, and the method has good environmental benefits and is suitable for large-scale popularization and application.

The invention provides a precious metal dissolving method and quantitative analysis method, which comprises the following steps: S1, carrying out first heating on a first mixture to obtain a first product; the first mixture comprises borosilicate glass, aqua regia and a hydrofluoric acid solution; the temperature of the heat preservation stage of the first heating is 80-150 DEG C; s2, performing second heating on the second mixture to obtain a second product; the second mixture comprises the first product and disulfate; the temperature of the heat preservation stage of the second heating is 600 DEG C or above; s3, performing third heating on the third mixture to obtain a third product; the third mixture comprises a second product and an acid solution; the temperature of the heat preservation stage of the third heating is 80 DEG C or above. The precious metal dissolving method can effectively dissolve the precious metal in the glass into the solution, and the quantitative method has excellent accuracy and precision.