156 results about "Sodium disulfite" patented technology

The invention belongs to the technical field of chemical medicine preparations, and particularly relates to a promethazine hydrochloride injection and a preparation method, the promethazine hydrochloride injection comprises the following components by weight concentration: 20-30 mg / mL of promethazine hydrochloride, 0.4-0.6 mg / mL of anhydrous sodium sulfite, 0.6-0.8 mg / mL of sodium pyrosulfite and 0.03-0.07 mg / mL of thioglycerol; the stability of the injection can be improved.

A method of forming a lubricant coating, a method of coating a bearing surface with a lubricant coating, and a vehicle including a bearing including a lubricant coating. A substrate, such as a bearing, including a surface and an electrode are immersed in an electrolyte bath. The electrolyte bath includes an aqueous electrolyte solution including sodium metabisulfite (Na2S2O5), sodium molybdate (Na2MoO4·2H2O), a pH modifier, an anionic surfactant, and water. A first pulsed direct current is applied through the aqueous electrolyte solution using a direct current power supply and a molybdenum disulfide (MoS2) layer is formed on the surface of the substrate.

The invention provides a method for treating discharge wastewater of a waste lithium battery, which comprises the following steps: S1, pulping a lithium cobalt oxide material by using discharge wastewater, and adding a first oxidant for reaction to obtain primary oxidized slurry; s2, mixing the primary oxidized slurry with high-grade matte nickel, and adding a second oxidizing agent for reaction to obtain secondary oxidized slurry; s3, the secondary oxidation slurry and an iron circulation activating agent are mixed for acid leaching, a liquid phase is taken after solid-liquid separation, and metal leaching liquid containing nickel and cobalt is obtained; wherein the first oxidizing agent comprises persulfate, the second oxidizing agent is selected from hydrogen peroxide, and the iron circulation activating agent is at least one of sodium hydrosulfite or sodium pyrosulfite. According to the method, short-range efficient selective recovery of valuable metals is realized through cooperation of lithium cobalt oxide and high nickel matte, the influence on the environment is greatly reduced, and the economic cost of the process is reduced.

The invention discloses a deflocculating agent for concrete washed sand and a preparation method of the deflocculating agent. The deflocculating agent is prepared from 0.5 to 1 part of air entraining agent, 0.1 to 0.2 part of sodium lauryl sulfoacetate, 15 to 30 parts of sodium pyrosulfite, 20 to 32 parts of sodium thiosulfate, 0.5 to 1 part of triethanolamine, 35 to 49 parts of diquat, 2 to 5 parts of maltodextrin, 0.4 to 1 part of cellulose and 0.5 to 1 part of glyceryl monostearate. The anti-flocculating agent provided by the invention can play a role in suspension stabilization, prevents undesirable phenomena of system instability and fluidity reduction caused by particle aggregation, can effectively solve the undesirable problems of high concrete viscosity, insufficient slump retaining performance, easy segregation and bleeding and the like caused by a flocculating agent, effectively reduces the concrete viscosity, and improves the concrete quality. And the construction performance and the quality of hardened concrete are ensured.

The invention relates to preparation of a cefazolin compound, in particular to a preparation method of a cefazolin acid three-position intermediate TDA. The preparation method comprises the following steps: carrying out condensation reaction on 7-ACA and MMTD serving as raw materials, dimethyl carbonate serving as a solvent and a boron trifluoride dimethyl carbonate complex and glacial acetic acid serving as catalysts to obtain condensation reaction liquid; adding EDTA (Ethylene Diamine Tetraacetic Acid) and sodium pyrosulfite into water, carrying out stirring reaction, transferring the condensation reaction liquid into water, and continuously carrying out heat-preservation stirring, so as to obtain a hydrolysis reaction liquid; and adding a sodium carbonate solution into the hydrolysis reaction solution while stirring, adjusting the pH value, growing crystals, and then performing suction filtration, washing and drying to obtain a finished product. A boron trifluoride dimethyl carbonate complex-glacial acetic acid catalysis method is adopted, the product quality and yield are guaranteed in industrial production, meanwhile, the reagent usage amount and the waste liquid generation amount are reduced, the production cost and the environment pressure are reduced, normal reaction is maintained at normal pressure, and the reaction is prevented from being too severe.

Disclosed herein are pharmaceutical formulations including epinephrine that have increased epinephrine retention over long-term storage, e.g., 30-months. In one aspect, a formulation includes: one or more of 0.1 mg / mL of epinephrine or a pharmaceutically acceptable salt thereof provided without any overage, a tonicity regulating agent including 8.2 mg / mL of sodium chloride, a pH adjusting agent including a mixture of 1.5 mg / mL sodium citrate dihydrate, 3.3 mg / mL of citric acid monohydrate, and, optionally, an as-needed amount of sodium hydroxide to maintain the pH level of the formulation within a range of 3.6 to 4.0, 0.075 mg / mL of sodium metabisulfite, and 4 μg / mL of ethylene diamine tetra-acetate disodium. The formulation has an API recovery of 94.5% or more after at least 30 months of storage at long-term storage conditions defined as 25° C.±2° C. at 1 atmosphere. In addition, in another aspect, a formulation includes 1 mg / mL of epinephrine and other ingredients.

The invention provides a preparation method of an edaravone and dextroborneol injection, the injection comprises edaravone, dextroborneol, propylene glycol and sodium pyrosulfite, in the preparation process, the propylene glycol accounting for 60%-85% of the prescription dosage and water accounting for 5%-25% of the prescription dosage are injected into a liquid preparation tank according to the volume ratio, the mixture is heated to 50-60 DEG C, edaravone is added and stirred to be dissolved, and the edaravone and dextroborneol injection is prepared. The preparation method comprises the following steps: dissolving propylene glycol in the remaining prescription dosage, adding dextroborneol which is dissolved by propylene glycol in the remaining prescription dosage in advance, uniformly stirring, adding water which is close to a constant volume, cooling to 25 DEG C or below, adding sodium pyrosulfite, adjusting the pH value to 4.0-5.0, and fixing the volume to a full volume. According to the preparation method of the edaravone dextroborneol injection, auxiliary materials in a specific proportion are matched with the preparation steps, the problem that raw material medicines are extremely easy to separate out in the preparation process is solved, the requirement of the preparation process for an industrial liquid preparation tank is low, industrial operation is convenient, and the preparation cost is low.

The invention relates to a water-soluble whitening composition with good light stability as well as preparation and application of the water-soluble whitening composition. The composition is prepared from the following raw material components in parts by weight: 2.5 to 7.5 parts of phenylethyl resorcinol, 80 to 95 parts of a water-based solvent, 0.005 to 1 part of a pH regulator, 1 to 5 parts of a light protective agent, 1 to 5 parts of diglucosyl gallic acid and 0.1 to 1 part of sodium pyrosulfite. Compared with the prior art, the whitening composition disclosed by the invention can be basically not changed under daily irradiation, and can provide a lasting protection effect for phenylethyl resorcinol when being used in products for whitening and the like.

The invention discloses preparation and application of a pH-responsive slow-release hydration heat inhibitor, and belongs to the technical field of concrete admixtures. The inhibitor is slowly released in a cement paste alkaline environment, cement hydration is continuously slowed down, and the temperature cracking risk of concrete caused by hydration heat is reduced. The core component is a pH sustained release microsphere, and the pH sustained release microsphere is composed of octadecyl acrylate, Span 80, Tween 60, white oil, acrylic acid, allyl polyoxyethylene ether 500, N, N-methylene bisacrylamide, deionized water, tert-butyl hydroperoxide, sodium pyrosulfite and the like. The preparation method comprises the steps of mixing an oil phase and a water phase, emulsifying, reacting and the like. The inhibitor further comprises sorbitol and methanol, and is prepared through the steps of stirring, filtering, drying and the like. The inhibitor can effectively reduce the hydration heat of cement, delay the setting time and improve the compressive strength of concrete.

The invention discloses a plant genome DNA (deoxyribonucleic acid) extraction reagent. The plant genome DNA extraction reagent comprises a Buffer 1 lysis solution, a Buffer 2 precipitation solution and a Buffer 3 binding solution, the Buffer 1 lysate comprises sodium chloride, PVP40 (Polyvinyl Pyrrolidone 40), sodium metabisulfite and SDS (Sodium Dodecyl Sulfate); wherein the concentration of the sodium chloride is 250 to 1200 mM; the mass percent of the PVP40 is 0.5%-3%; the concentration of the sodium metabisulfite is 50-150mM; the mass percent of the SDS is 0.7%-2.5%; the Buffer 2 precipitation solution comprises acetate; wherein the concentration of the acetate is 2.2 to 4.3 M; the Buffer 3 binding solution comprises guanidine hydrochloride; wherein the concentration of the guanidine hydrochloride is 0.5 to 2.5 M. The extraction reagent does not contain organic solvents such as phenol and chloroform, and the removal rate of polyphenol can be improved.

The invention provides a production process of an acute ischemic stroke neuroprotective agent, and particularly relates to a method for preparing an edaravone dextroborneol concentrated solution for injection, and the method comprises the following steps: adding a liquid medicine containing propylene glycol, edaravone, dextroborneol and sodium pyrosulfite into a liquid preparation tank; the temperature of the liquid medicine is controlled to be 0-50 DEG C, the pH value of the liquid medicine is adjusted to be 3.0-7.0, the liquid medicine is conveyed into an ampoule bottle through a conveying pipeline, the conveying pipeline is a pipe, and the ampoule bottle is filled with the liquid medicine through the pipe through a pump. According to the preparation method, the loss of effective components in the production and storage process of the liquid medicine is greatly reduced, the stability of the liquid medicine can be remarkably improved, and the preparation process is good in consistency, repeatable and suitable for industrial production.

Provided is a cosmetic containing ascorbic acid and / or a salt thereof, which has excellent stability and reduced irritation to the skin. The cosmetic according to the present invention contains ascorbic acid and / or a salt thereof, ultrapure water, and an antioxidant, and the salt of ascorbic acid is at least one selected from the group consisting of a trimethylamine salt, a triethylamine salt, a monoethanolamine salt, a triethanolamine salt, a pyridinium salt, an arginine salt, an ammonium salt, a sodium salt, a potassium salt, a calcium salt, a magnesium salt, and an aluminum salt of ascorbic acid. The antioxidant is glutathione or sodium pyrosulfite, the pH of the cosmetic material is adjusted to 5.0-7.0, and the dissolved oxygen content of the cosmetic material is 0-5 mg / L.

A method for increasing the softness and relaxation of dough, the method comprising a) adding at least one endopeptidase having at least 60% identity to SEQ ID NO: 1 or SEQ ID NO: 2 to flour or to a dough comprising flour, wherein L-cysteine ​​and / or sodium metabisulfite is not added to the dough; b) kneading the dough; and c) forming the dough into an edible product.

A method for increasing the softness and the relaxation of a dough comprising a) adding at least one endopeptidase having at least 60% identity to SEQ ID NO:1 or SEQ ID NO:2 to flour or to a dough comprising a flour, wherein no L-cystein and / or sodium metabisulfite is added to the dough; b) kneading the dough; and c) making the dough into an edible product.

The present disclosure discloses a composition for hair growth comprising Larix europea wood extract, Camellia sinesis leaf extract, Pisum sativum sprout extract, Curcuma longa (Turmeric) callus conditioned media, Hamamelis virginiana (Witch Hazel), Rosmarinus officinalis Leaf Oil, Glycerin, Glycine, Zinc Chloride, Sodium Metabisulfite, Gluconolactone, Sodium Benzoate, Calcium Gluconate, Tetrasodium ethylenediaminetetraacetic acid (EDTA), Saccharide Isomerate, Hyaluronic Acid, Hydrolyzed Hyaluronic Acid, Propanediol, Biotinoyl Tripeptide- 1, Alpha Glucosyl Hesperidin, Caffeine, Hydrolyzed Pea Protein, Polyalkylene Glycol Mono Butyl Ether, Acrylates / C 10-30 Alkyl Acrylate Crosspolymer, Panthenol, Niacinamide, Arginine, PEG-40 Hydrogenated Castor Oil, Ethylhexylglycerin, Phenoxyethanol, and water is added to the composition until the desired volume is achieved. A method for preparing the composition for hair growth is also provided.

Oral liquid formulations are provided containing sodium picosulfate, magnesium citrate, citric acid, malic acid, and an antioxidant selected from potassium metabisulfite and sodium metabisulfite, wherein the antioxidant is present in the composition at a concentration of from about 0.002 M to about 0.1 M, and wherein the composition has a pH of from about 4.0 to about 6.5.

The utility model relates to the technical field of sodium pyrosulfite production and preparation, and discloses a sodium pyrosulfite powder drying and conveying device which comprises a drying tower, a powder collecting box installed on one side of the drying tower and a conveying mechanism installed in the powder collecting box. A drain outlet penetrates through the bottom face of one end, close to the drying tower, of the powder collecting box, a sealing door is hinged to the inner wall of the drain outlet, a moving mechanism is connected to the bottom face of the outer wall of the powder collecting box, a supporting assembly is connected to the output end of the moving mechanism, and the other end of the supporting assembly penetrates through the outer wall of the drying tower to the interior of the drying tower. According to the sodium pyrosulfite powder drying and conveying device, the sealing assembly is arranged at the discharging opening between the drying tower and the powder collecting box, the drying tower and the powder collecting box can be separated when the interior of the powder collecting box is cleaned, and then the situation that sodium pyrosulfite powder in the drying tower is polluted by cleaning sewage in the powder collecting box can be avoided.

The invention provides a spicy walnut kernel and a preparation method thereof, and belongs to the technical field of food processing. The Chinese prickly ash sesame walnut kernels disclosed by the invention comprise the following components in parts by weight: 800-1200 parts of walnut kernels, 40-60 parts of Chinese prickly ash oil, 3-8 parts of chili oil, 3-5 parts of white granulated sugar, 3-5 parts of edible salt, 1-5 parts of monosodium glutamate, 3-8 parts of garlic powder, 1-5 parts of ginger powder, 3-8 parts of white pepper, 1-5 parts of a yeast extract, 0.02-0.1 part of disodium 5 '-ribonucleotide, 0.05-0.2 part of a rosemary extract, 0.1-0.3 part of an acanthopanax senticosus extract, 3-7 parts of amomum tsao-ko and 0.05-0.15 part of D-sodium erythorbate. 0.1 to 0.2 part of epsilon-polylysine hydrochloride, 0.1 to 0.3 part of potassium sorbate and 0.02 to 0.04 part of sodium pyrosulfite. The spicy walnut kernels prepared by the method are crisp and delicious, the nutrition of the walnut kernels is not lost, and the spicy walnut kernels are spicy, fresh and fragrant and have a long shelf life.

The invention discloses a promethazine hydrochloride injection and a preparation method thereof, and relates to the technical field of pharmaceutical preparations. Every 1 mL of the promethazine hydrochloride injection is prepared from the following raw materials and auxiliary materials: 20 to 30 mg of promethazine hydrochloride, 0.3 to 0.8 mg of anhydrous sodium sulfite, 0.5 to 1.5 mg of sodium pyrosulfite, 0.02 to 0.08 mg of citrulline, 0.02 to 0.05 mg of gallic acid and the balance of water for injection. The stability of the promethazine hydrochloride injection can be improved, the impurity content can be reduced, and it can be guaranteed that bacterial endotoxin meets the production requirement in the long-term storage process.

The application discloses a plant genome DNA extraction reagent, which comprises Buffer 1 lysate, Buffer 2 precipitate and Buffer 3 combination liquid; the Buffer 1 lysate comprises sodium chloride, PVP40, sodium metabisulfite and SDS; wherein the concentration of the sodium chloride is 250-1200 mM; the mass percentage of the PVP40 is 0.5%-3%; the concentration of the sodium metabisulfite is 50-150 mM; and the mass percentage of the SDS is 0.7%-2.5%; the Buffer 2 precipitate comprises acetate; wherein the concentration of the acetate is 2.2-4.3 M; and the Buffer 3 combination liquid comprises guanidine hydrochloride; wherein the concentration of the guanidine hydrochloride is 0.5-2.5 M. The extraction reagent does not contain organic solvents such as phenol and chloroform, and can improve the removal rate of polyphenols.

The invention relates to the technical field of medicines, in particular to a preparation process of xantinol nicotinate injection and an impurity control method of the xantinol nicotinate injection. According to the process, water for injection is subjected to nitrogen deoxidation treatment, a whole-process nitrogen-sealed environment is maintained, xantinol nicotinate is gradually added in three times, and a multi-component synergistic stable system including hydroxypropyl-beta-cyclodextrin, N-acetyl-L-cysteine, L-methionine, diethylenetriamine pentaacetic acid, sodium metasulfite, sodium thiosulfate and the like is matched, so that the xantinol nicotinate injection is prepared. Double-molecular-weight dextran is introduced to regulate and control a microenvironment, an acetic acid-sodium acetate buffer system is introduced to optimize pH, and finally, high stability and low impurity generation of the finished injection at high temperature are realized through nitrogen replacement subpackaging and precise sterilization conditions. According to the method, the content and the purity of the xantinol nicotinate injection are remarkably improved, the impurity content during sterilization and storage is remarkably reduced, the safety and the effectiveness of drugs are guaranteed, and the method has important significance on optimization of a heat-sensitive injection process.

The invention includes a phenylephrine product including an aqueous phenylephrine solution, a tonicity adjusting agent, at least one pH adjusting agent, at least one buffering agent and water for injection, wherein the phenylephrine solution is does not comprise sodium metabisulfite, wherein the phenylephrine product is sterile and ready-to-use and contain an oxygen absorber to keep the oxygen dissolved below 1 ppm. The invention includes methods of making and using the phenylephrine product.

The invention relates to the technical field of mineral separation and metallurgy, in particular to a processing technology for sufficient combustion of sulfur ore in a fluidized bed roaster, which comprises the following steps: crushing pyrite, screening, compounding, and carrying out flotation by using an efficient inhibitor to obtain pretreated pyrite powder; the pretreated pyrite powder is added into a fluidized bed furnace, and sufficient combustion treatment is carried out after the pretreated pyrite powder is spread flatly, so that furnace gas and furnace slag are obtained; the efficient inhibitor is obtained by mixing sodium hydrosulfite, sodium thioglycollate, sodium humate and a buffering agent; wherein the furnace temperature during sufficient combustion treatment is 910-930 DEG C, the combustion time is 4-5 h, and the oxygen concentration of an outlet of the fluidized bed furnace is 2.5%-3.0%. The specific particle size and high quality of the pretreated pyrite powder are combined with a roasting process, so that compared with the prior art, the method has the advantages that the firing rate is higher, the iron grade of slag is higher, the service life of a circulating pump is longer, and the application prospect is wider.

The flow aid for preparing highly fluid solidified loess provided by the present invention is mainly made of polyphosphate, polyquaternary ammonium salt and its derivatives, sodium metabisulfite, water retaining agent and water. It is characterized in that the mass percentage ratio of the polyphosphate, polyquaternary ammonium salt and its derivatives, water retaining agent, sodium metabisulfite and water is (2-5)%:(0.2-1)%:(0.2-0.8)%:(10-15)%:(75-85)%. The flow aid provided by the present invention effectively improves the comprehensive performance of the highly fluid solidified soil, obtains highly fluid solidified loess that meets the fluidity requirements, and ensures the quality of backfilling and filling projects.

The invention belongs to the technical field of textile decolorization treatment, and particularly relates to a two-component decolorizer for polyester textiles and a pretreatment method for recycling polyester textiles. The two-component decolorizer comprises component I and component II in a mass ratio of 1:2.2-3, component I comprises sodium hydroxide solution and sodium borohydride, and component II comprises sodium metabisulfite and sodium sulfite. Sodium borohydride is reacted with sodium metabisulfite and sodium sulfite in a strongly alkaline environment to generate a strongly reducing intermediate product for removing organic dye molecules from the textiles. The two-component decolorizer is suitable for decolorizing and recycling polyester textiles.

An onion product containing sodium metabisulfite, a flavor, a food-grade acid, onions, flavor, onions and an acidified solution comprising water and a food-grade acid, which allows for commercialized sterility of onion food as much as possible. Although may be otherwise prepared, the onion product is produced from a four-step filling process, including adding sodium pyrosulfite, a heat stable flavor, onion, an acidified solution comprising water and a food grade acid to a container, disinfecting, and optionally inverting the container.

The invention provides an anti-impact PS / ABS plate and a preparation method thereof, and the plate comprises the following components in parts by weight: 30-75 parts of polystyrene, 20-70 parts of an acrylonitrile-butadiene-styrene copolymer, 2-8 parts of sodium pyrosulfite-styrene-acrylonitrile copolymer core-shell microspheres, 2-8 parts of montmorillonoid with ethanolamine grafted on the surface, 2-5 parts of butyl stearate, 2-5 parts of 2, 3, 5-trimethyl-1, 3-pentanediol monoisobutyrate, 1-3 parts of a plasticizer, and 1-3 parts of an antioxidant. And 1 to 2 parts of 2, 6-butylated hydroxytoluene. According to the invention, sodium pyrosulfite-styrene-acrylonitrile copolymer core-shell microspheres and montmorillonoid grafted with ethanolamine on the surface are added into a mixed system of PS and ABS, so that PS / ABS is endowed with impact resistance.

The utility model relates to the technical field of sodium metabisulfite processing, in particular to a sodium metabisulfite sulfur feeding mechanism which comprises a barrel, a top cover is arranged at the top of the barrel, a sulfur feeding pipe is rotatably mounted in the center of the top cover, a plurality of sulfur discharging holes are formed in the lower portion of the outer side wall of the sulfur feeding pipe, and the sulfur discharging holes are communicated with the top cover. The top of the sulfur inlet pipe is connected with a gas conveying pipe through a rotary joint, the outer side wall of the sulfur inlet pipe is communicated with a plurality of stirring pipes, and a plurality of auxiliary holes are formed in the stirring pipes. According to the utility model, the sulfur inlet pipe is rotatably mounted on the top cover, when the sulfur inlet pipe needs to be cleaned, the rotary joint box gas conveying pipe is firstly disassembled, then the two lifting lugs are hooked by using a crane, and then a worker presses the fixing rod to enable the fixing rod to leave the through hole and enter the connecting hole, so that the fixation of the upper plate and the lower plate can be cancelled, and the separation of the top cover and the cylinder body is realized; the top cover can be lifted upwards by a crane, the sulfur inlet pipe is taken out from the cylinder, and a worker can conveniently clean the sulfur inlet pipe and the cylinder.

A method for preparing and using a high-carbon high-alloy steel isothermal quenching structure etchant, which belongs to the field of analysis and testing. It solves the problem that the existing Lepera etchant raw material picric acid is prohibited, and the conventional nitric acid alcohol etchant is difficult to efficiently and accurately etch and display the metallographic structure of high-carbon high-alloy steel after isothermal quenching. Preparation: A nitric acid alcohol solution with a volume fraction of 4% to 10% is mixed with a sodium metabisulfite solution with a mass fraction of 0.5% to 1%. Use: 1. Wire cutting sample preparation; 2. Grinding and polishing sample preparation; 3. Sample corrosion; 4. Metallographic structure observation. The present invention has low cost, convenient and safe operation, and no pollution; under the premise of ensuring safety, the etchant is used to achieve efficient and accurate observation, analysis and evaluation of the isothermal quenching structure of high-carbon high-alloy steel, so as to further evaluate the effectiveness of the isothermal quenching process; when used, it only takes 25 seconds to obtain an ideal tissue morphology. The present invention is suitable for metallographic etching of the isothermal quenching structure of high-carbon high-alloy steel.

The invention discloses a production process of an ambroxol oral solution, and belongs to the technical field of chemical medicinal preparations, the production process comprises the following steps: adding an aqueous solution containing ambroxol hydrochloride, clenbuterol hydrochloride, sorbitol, propylene glycol, glycerol, hydroxyethyl cellulose, DL-tartaric acid and sodium benzoate into a reaction kettle, and uniformly stirring to obtain the ambroxol hydrochloride oral solution, the clenbuterol hydrochloride, the sorbitol, the propylene glycol, the glycerol, the hydroxyethyl cellulose, the DL-tartaric acid and the sodium benzoate; the preparation method comprises the following steps: preparing in a production system passivated by hydroxyethyl diamine tetraacetic acid trisodium salt, treating by a two-stage series hollow membrane contactor, and finally filling a glass bottle with a liquid medicine. According to the preparation method disclosed by the invention, on the basis of prescription adjustment without adding antioxidants such as sodium pyrosulfite and the like, the impurities of the medicine in the production and storage processes are obviously reduced, the product stability and the clinical medication safety are improved, and the preparation process is simple and stable to operate and suitable for industrial production.