65 results about "Bisulfate salt" patented technology

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 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 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.

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 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.

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 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.

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 method for recovering magnesium and lithium in brine. The method comprises the following steps: performing pretreatment and nanofiltration on the brine; collecting a permeate and a concentrated solution after nanofiltration, and performing magnesium recovery on the concentrated solution; eluting the permeate after the permeate is adsorbed, and collecting a lithium-containing solution; an adsorbent selected for adsorption is modified manganese oxide; the modified manganese oxide is prepared from the following preparation raw materials: phosphorus modified carbon nitride, silane, 1-butyl-3-methylimidazole bis (trifluoromethanesulfonyl) imide salt, 1-sulfobutyl-3-methylimidazole hydrogen sulfate and an aluminum-nickel co-doped manganese lithium oxide. According to the method, brine is pretreated, so that the risk of pollution of the brine to a nanofiltration membrane is reduced, the pretreated brine is pumped into a nanofiltration system, and trapped fluid enriched with magnesium and sulfate ions and high-lithium permeate liquid are generated; by utilizing the selectivity of the nanofiltration membrane on monovalent / divalent ions, crude separation of magnesium and lithium is realized, and the load of a subsequent adsorption unit is greatly reduced; and fine extraction is carried out through adsorption, so that the purity of a final lithium product is improved.

The application discloses a method for repairing chlorobenzene contaminated groundwater in-situ by using soluble Mn(III), and belongs to the technical field of environmental pollution repair, and comprises the following steps: construction of an in-situ injection system, preparation of a repair reagent, rapid removal of chlorobenzene, and continuous mineralization of degradation products. The soluble Mn(III) generated by a permanganate / bisulfite (PM / BS) process is selected as the repair reagent, the chlorobenzene pollutants are rapidly and efficiently degraded through an electrophilic substitution mechanism, the PM process is coupled, the continuous mineralization of intermediate products is realized, and the complete elimination of the chlorobenzene pollutants in the groundwater is achieved. The technical method is simple and practical, the process is green, the treatment effect is complete and not prone to rebound, the cost is relatively low, the method is beneficial to large-scale promotion, and the method has remarkable economic, environmental and social effects.

The application discloses a preparation method of a chitosan-based injectable self-healing hydrogel, and the method comprises the following steps: adding a sodium hyaluronate solution or a mixed solution of sodium hyaluronate and sodium bisulfate into a chitosan acetic acid solution drop by drop while stirring, performing suction filtration and flushing after the dropping is completed, and obtaining an initial hydrogel; pre-freezing the initial hydrogel, freeze-drying the initial hydrogel, grinding the freeze-dried hydrogel to obtain a freeze-dried gel powder; adding the freeze-dried gel powder into a solvent to prepare a sol, and obtaining a secondary hydrogel product after standing; the freeze-dried gel powder has good injectability in the secondary gelation process, and the obtained secondary hydrogel has self-healing property; the application solves the storage difficulty of general hydrogels, the prepared gel powder can be stored at room temperature for a long time, the secondary gelation process is simple to operate, the hydrogel has high biocompatibility and safety, and has a wide clinical application prospect.

This application discloses a crystal form of an acid addition salt of an ATR inhibitor, its preparation method, and its uses. The crystal form of the acid addition salt includes at least one of the hydrogen sulfate and methanesulfonate crystal forms of the compound shown in formula (I). The crystal form of the acid addition salt of this application has advantages such as strong preparation stability, high solubility, and low hygroscopicity, making it more suitable for formulation preparation. (I)

The application discloses a solution containing natural macromolecule and a coagulation molding method. The fiber stream obtained by wet spinning of the solution containing natural macromolecule is coagulated and molded through at least one coagulation bath. The solution containing natural macromolecule contains metal hydroxide and an additive selected from at least one of urea, zinc oxide and thiourea. Bicarbonate or bisulfite or a combination of bicarbonate and carbonate or a combination of bisulfite and sulfite is used as a component of the coagulation bath. The low-cost, green, efficient, non-toxic, harmless and inexpensive inorganic salt solution does not contain strong acid and organic solvent, and can be used to prepare long fibers with circular cross section and excellent mechanical properties. The long fibers have smooth surface, softness and luster. In the coagulation bath, the bicarbonate and carbonate or the bisulfite and sulfite can be easily separated and recovered.

The invention belongs to the field of aquaculture, and particularly relates to an ammonia nitrogen remover for aquaculture and a preparation method thereof. The ammonia nitrogen remover comprises the following components in parts by weight: 8-10 parts of organochlorine, 6-8 parts of peroxide, 0.2-0.5 part of an oxygen supply agent, 0.5-1 part of a catalyst, 2 parts of a pH regulator and 4-5 parts of a stabilizer, the organic chlorine is sodium dichloroisocyanurate and cyanuric chloride, or cyanuric chloride; the catalyst is ferrocene; the pH regulator is sodium hydrogen sulfate and phosphate or phosphate; the stabilizer is anhydrous sodium sulfate and anhydrous magnesium sulfate, or anhydrous sodium sulfate and anhydrous magnesium chloride. Hypochlorous acid is slowly released through the organic precursor, ammonia nitrogen in water is degraded in combination with a magnesium ammonium phosphate method, the concentration is controllable, and the validity period is long. According to the ammonia nitrogen remover, ammonia nitrogen is efficiently degraded, meanwhile, the problem that the initial available chlorine concentration is too high is avoided, and the safety and stability of the treatment process are remarkably improved.

The application provides a method for preparing 1,2,4-trifluorobenzene, and belongs to the field of preparation of fluorine-containing intermediates, and comprises the following steps: (1) adding 2,4,5-trifluoroaniline, hypophosphorous acid and a catalyst into a dialkyl carbonate to obtain a mixed solution; (2) adding a nitrosyl sulfuric acid solution into the mixed solution obtained in step (1) and reacting for a certain time; and (3) separating 1,2,4-trifluorobenzene from the reaction solution in step (2). The method has the advantages of simple process, mild reaction condition, no generation of waste water and sodium bisulfate salt, recyclable 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 more than 99%, and the product purity is as high as more than 99.9%.

This invention provides a method for lithium extraction from lepidolite, comprising the following steps: S1, mixing lepidolite ore with ferrous sulfate heptahydrate and sodium bisulfate, followed by mechanical activation to obtain a pretreated mixture; the mass ratio of lepidolite ore, ferrous sulfate heptahydrate, and sodium bisulfate is 1:0.07-0.5:0.07-0.5; S2, calcining the pretreated mixture to obtain clinker; the calcination temperature is 700-900℃; S3, sequentially subjecting the clinker to water leaching and solid-liquid separation to obtain a lithium leachate. This invention can increase the lithium extraction efficiency from lepidolite to over 98% at a relatively low calcination temperature.

The invention belongs to the field of new materials, and discloses a preparation method of 1-propylene-1, 3-sultone, which comprises the following steps: step 1, addition reaction: using propargyl alcohol and alkali metal sulfite and / or alkali metal hydrosulfite as raw materials, and carrying out addition reaction in the presence of a catalyst and a free radical initiator to obtain an addition product; step 2, acidification reaction: adjusting the pH value of the addition product to 4 or below 4, and separating to obtain an acidified product; step 3, cyclization reaction: carrying out cyclization reaction on the acidified product to obtain 1-propylene-1, 3-sultone; the catalyst is soluble metal salt which is soluble in water. According to the method, the catalyst and the free radical initiator which are low in price are compounded, so that a product with relatively good conversion rate and selectivity is obtained.

The invention discloses a method for preparing a sodium sulfate solution and chromic oxide of different grades from chromium-containing sodium hydrogen sulfate, which comprises the following steps: calcining the chromium-containing sodium hydrogen sulfate at high temperature to obtain a solid product and a gas product; putting the solid product into a pulping tank, adding water, pulping and dissolving until the solid product is completely dispersed, preparing a feed liquid, and carrying out filter pressing to obtain a primary filter-pressed filter cake and an acidic solution; adding alkali into the acidic solution for neutralization, preserving heat and curing, and then carrying out filter pressing to obtain a secondary filter-pressed filter cake and a slightly acidic solution; washing and filter-pressing the primary filter-pressed filter cake, and calcining to obtain low-grade chromium sesquioxide; and washing the secondary filter-pressed filter cake, carrying out filter pressing, and calcining to obtain the high-grade chromium sesquioxide. The invention provides the method for efficiently recycling the by-product chromium-containing sodium hydrogen sulfate in the production process of chromic anhydride, the problem of poison of wastes is solved, the process is simple and easy to operate, environmental protection benefits and economic benefits are considered, and the method is suitable for industrial production.