189 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.

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 relates to the technical field of fine chemical engineering, and provides a method for synthesizing O-methyl-N-nitroisourea by a micro-channel reactor, which comprises the following specific steps: adding nitric acid into a four-neck bottle for cooling, dropwise adding fuming sulfuric acid, controlling the temperature of a mixed solution, adding sulfuric acid into the four-neck bottle, and reacting for 2-4 hours; stirring and a low-temperature constant-temperature reaction bath are started to cool sulfuric acid, disulfate is put into a four-opening bottle to prepare a disulfate sulfuric acid solution, a mixed acid metering pump is started, a disulfate sulfuric acid solution metering pump is started, the disulfate sulfuric acid solution is mixed and enters a nitration micro-channel reaction device, and after heat preservation of nitration liquid is completed, the nitration liquid is dropwise added till the temperature is lowered to 0 DEG C in advance; the preparation method comprises the following steps: adding water into a reaction kettle, dropwise adding while stirring, continuously cooling and preserving heat after dropwise adding, carrying out suction filtration on eluted feed liquid, and washing a filter cake with chilled water to obtain an O-methyl-N-nitroisourea wet product, so that the defects of long production period, low effective productivity, lower safety coefficient and relatively higher safety risk of a traditional method for synthesizing O-methyl-N-nitroisourea are overcome.

The invention discloses a preparation method and application of active cationic chitosan nanoparticles, which comprises the following steps: reacting a low-molecular chitosan triethylamine hydrogen sulfate ionic liquid ([(C2H5) 3NH] HSO4) solution with an aldehyde compound ethanol solution to form Schiff base protection on chitosan C2-site amino, and then reacting with 2, 3, 5, 6-tetramethyl-4-piperidine-2-one to obtain the active cationic chitosan nanoparticles. The preparation method comprises the following steps: carrying out nucleophilic substitution reaction on chitosan C6 in the presence of a basic catalyst by using 2, 3-epoxypropyl trimethyl ammonium chloride, then adding a chemical initiator, carrying out grafting reaction on chitosan C3 and acrylic acid, and then removing Schiff base protection on chitosan C2. Carboxylate anions of acrylic acid and cations of chitosan are subjected to cross-linking self-assembly through a hydrothermal reaction, and the chitosan nanoparticles which are high in stability, small in particle size, uniform in distribution and efficient and lasting in function are obtained. The prepared nanoparticles are high in reaction activity, contain a large amount of quaternary ammonium salt, amino dication groups and carboxyl groups, and have wide application prospects in the fields of dye adsorption, heavy metal adsorption, textile function finishing and the like.

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 sustainable purification method based on nanobubbles, and relates to the technical field of water treatment. The sustainable purification method based on the nanobubbles comprises the following steps: preparing a nanobubble solution through a nanobubble generator; mixing the nano-bubble solution with hydrogen persulfate to activate the hydrogen persulfate, and promoting decomposition of the hydrogen persulfate on a nano-bubble interface to generate free sulfate radicals; the peroxydisulfate is used for water treatment and purification after being activated. By means of the innovative structural design and the utilization of the characteristics of the nano bubbles, the oxidative degradation efficiency is improved, meanwhile, the purification capacity can be kept as long as several months, low-energy-consumption, pollution-free and sustainable green environment restoration is achieved, and an efficient, environment-friendly and economical new way is provided for water pollution treatment.

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 relates to the field of preparation of guanidine or derivatives thereof, and particularly discloses high-purity creatine monohydrate and a preparation method thereof. The preparation method comprises the following steps: sequentially carrying out condensation reaction, acidolysis reaction and hydrolysis reaction on dimethyl sulfate and urea, cooling, crystallizing and filtering to obtain O-methylisourea hydrogen sulfate, and then reacting a sarcosine salt aqueous solution with the O-methylisourea hydrogen sulfate under the conditions that the temperature is 45-65 DEG C and the pH value is 10-12 to obtain the sarcosine salt. And performing post-treatment to obtain the high-purity creatine monohydrate. The preparation method has the advantages of being low in raw material cost, easy to transport and store and rich in source, byproducts in the reaction process are few, danger is low, the yield and purity are high, the industrial requirement is met, and the preparation method is suitable for large-scale industrial production.

To provide a novel salt of a compound that is a Bcl-2 inhibitor.SOLUTION: The present invention provides a novel salt, which is a hydrogen sulfate salt, represented by the following structural formula; related crystalline forms, characterized by X-ray powder diffraction patterns; a method for preparing the same; and pharmaceutical compositions containing the same.SELECTED DRAWING: None

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 present invention belongs to the technical field of poly 3-hydroxybutyrate utilization, and relates to a method for preparing R-3-hydroxybutyrate by catalyzing the degradation of poly 3-hydroxybutyrate with sodium bisulfate as a catalyst. Poly 3-hydroxybutyrate, sodium bisulfate catalyst and solvent are mixed evenly and reacted, and after the reaction is completed, the temperature is lowered, water is added and stirred for stratification, and the upper solution is distilled to recover the solvent and the target product, and the lower solution is evaporated and concentrated, and sodium bisulfate is recovered by cooling and crystallization. The method of the present invention is simple in process and easy to operate, solves the problems of large environmental pollution, inability to recycle and reuse, and troublesome post-processing of traditional homogeneous catalysts, realizes the recovery and reuse of catalysts, and efficiently prepares R-3-hydroxybutyrate at the same time, with a yield of up to 128wt%, and a sodium bisulfate recovery rate of 96%.

The invention provides a method for preparing 1, 2, 4-trifluorobenzene, which belongs to the field of fluorine-containing intermediate preparation, and comprises the following steps: (1) adding 2, 4, 5-trifluoroaniline, hypophosphorous acid and a catalyst into dialkyl carbonate to obtain a mixed solution; (2) adding a nitrosyl sulfuric acid solution into the mixed solution obtained in the step (1), and reacting for a certain time; and (3) separating the reaction liquid in the step (2) to obtain the 1, 2, 4-trifluorobenzene. The method has the advantages of simple process, mild reaction conditions, no generation of waste water and sodium bisulfate, recycling of the catalyst, maximum utilization of cuprous oxide, maximum reduction of pollution and full utilization of resources. The conversion rate is as high as 100%, the selectivity is as high as 99% or above, and the product purity is as high as 99.9% or above.

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 invention discloses sulfonated asphalt for drilling fluid and a preparation method thereof. The preparation method comprises the following steps: (1) crushing asphalt, dissolving the crushed asphalt in an organic solvent, adding a sulfoxide catalyst and halogenated imide, and uniformly stirring to obtain a mixed material; (2) adding sulfite and / or hydrosulfite into the mixed material obtained in the step (1), and reacting; and (3) after the reaction in the step (2) is finished, cooling, separating, recovering an oil phase, concentrating a water phase, drying and crushing to obtain the sulfonated asphalt for the drilling fluid. The sulfonated asphalt for the drilling fluid has the characteristics of mild and controllable reaction conditions, quick and sufficient reaction, few side reactions, cheap and easily available reaction raw materials and the like during preparation, and the sulfonated product prepared by the method has good thermal stability and remarkable filtration loss reduction effect under high-temperature conditions.

The invention provides a method for synergistically preparing 3, 4-dihydro-2H-benzo [b] [1, 4] thiazine through monopersulfate, and belongs to the technical field of heterocyclic compounds. In the presence of a mixed solvent, a 2-N-benzenesulfonyl substituted phenylmethyl sulfide derivative and a halide MX are used as raw materials, and the (E)-2-(halogenated methylene)-4-p-toluenesulfonyl-3, 4-dihydro-2H-benzo [b] [1, 4] thiazine is prepared through catalysis of a catalyst monopersulfate at the reaction temperature of not more than 80 DEG C. The preparation method comprises the following steps of: preparing the (E)-2-(halogenated methylene)-4-p-toluenesulfonyl-3, 4-dihydro-2H-benzo [b] [1, 4] thiazine, the method has the advantages of simple preparation steps, mild reaction conditions, environmental protection, high product yield, high stereoselectivity, simple composition of raw materials and auxiliary materials participating in the reaction, low price, and easy obtaining, and reduces the synthesis cost.

The invention discloses a method for preparing a high-purity pentoxifylline intermediate, wherein the prepared 6-bromo-2-hexanone crude product is reacted with an alkali metal bisulfite to generate a novel 6-halogenated-2-hydroxyhexane-2-sulfonic acid alkali metal salt, and then the 6-bromo-2-hexanone pure product is generated under the action of a hydrohalic acid or a base, without the need for rectification and purification, and the post-processing operation is simple, in line with the trend of green chemical industry, and has a good industrial production application prospect. At the same time, the present invention can effectively avoid the dimer impurities generated in the high-temperature distillation process, and the yield and purity are high, which provides favorable guarantees for the safety and effectiveness of preparing the finished drug pentoxifylline.

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.

Described herein are methods and systems for increasing the injectivity of wells used to inject water or water containing various chemicals such as water-soluble polymers for the purpose of increasing the recovery of hydrocarbons such as crude oil from a hydrocarbon-bearing formation. Injectivity often decreases because of adverse reactions or plugging at or near the wellbore. The treatment procedure involves injecting reducing agents (e.g., sulfite or metabisulfite salts) dissolved in water or water containing other chemicals such as polymers.

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 application discloses a rosuvastatin calcium intermediate and a preparation method thereof, and belongs to the technical field of medicinal chemistry and organic synthesis. + [R-CH(OH)-SO3] ‑ , wherein R is 4-(4-fluorophenyl)-6-isopropyl-2-(N-methyl-N-methylsulfonamido)pyrimidin-5-yl, A + is Na + , K + or NH4 + . Pyrimidine-5-formaldehyde is reacted with a corresponding bisulfite in water and a water-miscible organic solvent, a reverse solvent is added, crystallization is performed by cooling, filtration and drying are performed to obtain a crystalline addition product; active pyrimidine-5-formaldehyde is converted into a crystalline bisulfite addition product, the degree of oxidation and other degradation reactions of an aldehyde group in a storage process is reduced, and the content retention rate of the intermediate under long-term and accelerated storage conditions is improved.

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.