487 results about "Sulphate sodium" patented technology

The invention provides a composite quality control liquid for an electrochemical multi-parameter detector. The composite quality control liquid comprises a buffer volume, a quality control substance and a stabilizer, the stabilizing agent comprises 5 to 50 g / L of bovine serum albumin, 0.1 to 10 g / L of EDTA-2Na (Ethylene Diamine Tetraacetic Acid), 10 to 100 g / L of a viscosity regulator, 0.3 to 25 g / L of a preservative and 5 to 20 g / L of a surfactant; the preparation method comprises the following steps: adding components of the stabilizer into a buffer system, preparing a preparation solution, preparing mother liquor of each quality control substance, proportionally mixing glucose mother liquor, uric acid mother liquor, beta-hydroxybutyric acid mother liquor and cholesterol sodium sulfate and triglyceride composite mother liquor according to the target concentration of the quality control solution, and fixing the volume by using the preparation solution to obtain the quality control liquid. And fully and uniformly mixing to obtain the composite quality control liquid. The composite quality control liquid can ensure that uric acid is not degraded, cholesterol triglyceride is not separated out, the formula is mild, and active substances in a detection system are not influenced.

The invention relates to the technical field of organic synthesis, in particular to a method for constructing Orforglipron tetrahydropyran ring chirality through enzyme catalysis, which comprises the following steps: step S1, taking SM1 as a raw material, and carrying out hydrolysis resolution in a solvent, a buffer salt system and enzyme catalysis to obtain a chiral pure intermediate INT-1; step S2; performing ring closing on the INT-1 through Grignard reaction to synthesize a lactone intermediate; s3, carrying out Diball-H reduction, quenching, dichloromethane extraction and anhydrous sodium sulfate drying on the INT-4, and then reducing the INT-4 by using triethyl silane to obtain an intermediate INT3; step S4, coupling the INT-3 in the presence of a catalyst and a ligand to obtain an intermediate INT-4; step S5, carrying out deprotection and salification on the INT-4 to obtain an intermediate INT5; s6, closing an indole ring from INT5 to obtain a compound of which the general formula is A; chirality is constructed through enzyme catalysis, isomer impurities do not need to be split and separated through SFC when the chirality is constructed, the loss is reduced, the yield is increased, and a target product is obtained with high chiral selectivity; meanwhile, the cost is relatively reduced, and the cost is saved.

An aqueous oleanolic acid solution, including from about 0.10 to 2.5 weight % oleanolic acid, from about 60 to 90 weight % solvent, and from about 20 to 40 weight % solubility agent, wherein the solvent includes water, the solubility agent includes sodium lauryl sulfate (SLS), and the aqueous oleanolic acid solution is substantially free of ethanol and dimethyl sulfoxide (DMSO).

The invention discloses a core-shell structure P (MMA-MBA) copolymer heat-storage phase-change microcapsule, the microstructure is of a spherical structure, the core-shell structure is adopted, the core structure is hexadecane, the shell structure is a methyl methacrylate (MMA) and N, N-methylene bisacrylamide (MBA) copolymer, the emulsifier is lauryl sodium sulfate (SDS), the initiator is potassium persulfate, and the pH value of the core-shell structure P (MMA-MBA) copolymer heat-storage phase-change microcapsule is 7-8. And the coating efficiency is 70-75%. The preparation method comprises the following steps: 1, preparing an oil phase and a water phase; and 2, polymerization reaction of the microcapsule. A phase change cement material based on a core-shell structure P (MMA-MBA) copolymer heat storage phase change microcapsule is prepared by compounding the P (MMA-MBA) copolymer heat storage phase change microcapsule and a cement matrix, and has hydrophobicity; obvious weightlessness exists in two times.

The invention relates to the technical field of high polymer materials, in particular to a color-spun superfine sea-island imitation sheepskin fabric and a production method thereof. The color-spun superfine sea-island imitation sheepskin fabric comprises the following raw materials in parts by weight: color-spun superfine sea-island fibers, conventional polyester filaments and a functional additive, the color spinning superfine sea-island fiber is formed by blending alkali-resistant color master batches and a sea-island base material, the mass ratio of an island component to a sea component in the sea-island base material is (5-7): (3-5), and raw materials of the island component and the sea component are polyethylene terephthalate and polyethylene respectively; the functional additive comprises an alkali-resistant stabilizer, a dyeing auxiliary agent and a softening agent. According to the invention, sodium citrate and KH-550 in the alkali-resistant stabilizer react at a constant temperature, sodium citrate is dissolved in the process and forms weak interaction with amino of KH-550 to enhance the stability of the system, and ether bonds of polyoxyethylene fatty acid and sulfonic groups of lauryl sodium sulfate in the dyeing auxiliary agent form a synergistic effect to enhance the emulsifying and wrapping capacity to grease and color paste.

The invention belongs to the technical field of microbial culture, and particularly relates to a culture medium composition and application thereof in PDRN recombinant escherichia coli fermentation. The culture medium composition comprises a fermentation culture medium and a fed-batch culture medium, the fermentation culture medium consists of disodium hydrogen phosphate, monopotassium phosphate, ammonium sulfate, magnesium chloride, calcium nitrate tetrahydrate, glycerol and water; the supplemented culture medium is composed of dipotassium phosphate, sodium dihydrogen phosphate, sodium sulfate, ammonium sulfate, ammonium chloride, diammonium hydrogen citrate, glycerin and water, and the metabolic requirements of PDRN recombinant escherichia coli are accurately matched. Meanwhile, the invention provides a fermentation method using the composition, and the problems of unbalanced nutrition, low fermentation efficiency and the like of an existing culture medium are solved. Stable proliferation of thalli can be remarkably promoted, the yield of PDRN products is increased, the culture medium is easy and convenient to prepare, fermentation conditions are easy to control, and the culture medium is suitable for industrial large-scale production and has important application value.

The present invention relates to the technical field of organic synthesis, and specifically relates to a method for constructing the chirality of a pyran ring in Orforglipron by means of enzymatic catalysis, the method comprising the following steps: step S1, by using SM1 and SM2 as starting materials, carrying out a reaction under the action of a palladium catalyst and a ligand to obtain INT-1; step S2, under the catalysis of Pd / C, subjecting INT-1 to double bond hydrogenation reduction to obtain INT-2; step S3, in the presence of a solvent, a buffer salt system and enzymatic catalysis, subjecting INT-2 to hydrolysis and resolution to obtain a chirally pure intermediate INT-3; step S4, subjecting INT-3 to a Grignard reaction for cyclization, so as to synthesize a lactone intermediate INT-4; and step S5, subjecting INT-4 to reduction by means of Dibal-H, quenching same, performing extraction with dichloromethane, drying same with anhydrous sodium sulfate, and then performing reduction by means of triethylsilane to obtain a compound of general formula A. In the present invention, the chirality is constructed by means of enzymatic catalysis without the need of SFC resolution for separating isomeric impurities during the construction of the chirality, thereby reducing losses and improving yield, obtaining the target product at high yield and high chiral selectivity, and further saving expenses and reducing costs.

The invention provides an ultrathin temperature-sensitive hydrogel flexible electrode and a preparation method thereof, and belongs to the technical field of hydrogel electrodes. The preparation method comprises the following steps: mixing monomer acryloyl glycinamide and acrylic acid, and dissolving in deionized water to obtain a mixed solution A; adding a chemical cross-linking agent and a poly (3, 4-ethylenedioxythiophene)-poly (styrene sulfonate) solution into the mixed solution A to obtain a mixed solution B; adding sodium sulfate and tannic acid into the mixed solution B to obtain a prepolymerization solution; adding an initiator into the pre-polymerized solution to obtain a polymerized solution; the preparation method comprises the following steps: adding thermoplastic polyurethane particles into a mixed solution of N, N-dimethylformamide and tetrahydrofuran to form a precursor solution, and carrying out electrostatic spinning on the precursor solution to obtain a film matrix; and coating the polymerization solution on the surface of a thin film substrate, and packaging a conductive copper foil to obtain the ultrathin temperature-sensitive hydrogel flexible electrode. The mechanical property and the adhesion property of the flexible electrode are improved, and the adhesion strength can be dynamically adjusted by regulating and controlling the temperature.

The invention relates to a novel quaternary ammonium salt modified positively charged nanofiltration membrane and a preparation method thereof, and belongs to the technical field of membrane separation. Adding the prepared novel quaternary ammonium salt monomer QAC serving as an additive into a water-phase solution containing an amine monomer and lauryl sodium sulfate (SDS) to form a mixed water-phase solution; and carrying out polymerization reaction with acyl chloride monomers in an oil phase on a water-oil interface by an interfacial polymerization method to realize preparation of the novel quaternary ammonium salt modified positively charged nanofiltration membrane. The QAC monomer serving as a novel end-capping reagent can react with acyl chloride groups in acyl chloride monomers in the interfacial polymerization process, so that further reaction between the QAC monomer and amine monomers in a water phase is prevented, the crosslinking degree of a macromolecular network structure in the polymerization process is reduced, and the permeation flux of the composite membrane is favorably improved. Meanwhile, the quaternary ammonium salt structure also effectively enhances the positive charge density of the surface of the nanofiltration membrane, so that the interception performance of the nanofiltration membrane on divalent magnesium ions in the magnesium-lithium separation process is enhanced, and efficient separation of magnesium and lithium is realized.

The invention relates to the field of biomimetic materials, in particular to a biomimetic self-cleaning anti-fouling aquaculture net cage material, a preparation method and application of the biomimetic self-cleaning anti-fouling aquaculture net cage material. 0.5 to 2.0 parts by weight of a carboxylated graphene nanosheet; 2.0 to 5.0 parts by weight of nitrogen-doped titanium dioxide nanoparticles; 1.0 to 3.0 parts by weight of silica nanoparticles; 5.0 to 10.0 parts by weight of calcium ion cross-linked modified sodium alginate; 1.0 to 3.0 parts by weight of octadecyl trichlorosilane; 0.5 to 1.5 parts by weight of lauryl sodium sulfate; through the synergistic effect of a double bionic structure and enhanced photocatalysis, the effective inhibition on attachment of various organisms is realized, and the inhibition rate on attachment organisms such as algae, bacteria and barnacles reaches 75% or above.

This invention discloses a biomass asphalt hard carbon material, negative electrode, battery, and preparation method from waste peels of the citrus fruit. It belongs to the technical field of biomass hard carbon materials for sodium-ion batteries. The preparation of the asphalt hard carbon includes: using waste peels of the citrus fruit and asphalt as raw materials, activating them separately with sodium dodecyl sulfate and naphthalene, then performing pre-carbonization and pre-oxidation, followed by mixing, acidification, and carbonization treatments to obtain biomass asphalt hard carbon. This invention efficiently recycles and utilizes the widely available and high-density waste peels of the citrus fruit, turning waste into treasure. Simultaneously, it employs a green and simple preparation method to obtain biomass asphalt hard carbon with a large interlayer spacing, small specific surface area, and abundant closed-cell volume, significantly improving carbon recovery.

The invention relates to a nano bismuth agent for preventing and / or treating gastritis infection as well as a preparation method and application thereof, the preparation method comprises the following steps: respectively dissolving soluble bismuth salt and a sulfur-containing compound, mixing, and reacting to obtain the nano bismuth agent after the reaction is finished, the sulfur-containing compound is any one or a combination of at least two of thioamino acid, vitamin B1, thioacetamide, sodium sulfide, sodium thiosulfate, bovine serum albumin, whey protein, ovalbumin or metallothionein. The prepared nano bismuth agent has efficient antibacterial performance, shows an excellent curative effect which is two orders of magnitude higher than that of an existing bismuth complex on clinically separated drug-resistant helicobacter pylori, and does not further induce increase of drug resistance of the helicobacter pylori.

The application provides a method for synthesizing an eplerenone intermediate N-1 by one-pot method, and belongs to the technical field of organic synthesis. The method is characterized in that: the eplerenone intermediate N-4 is dissolved in dichloromethane, a potassium carbonate aqueous solution and dibromohydantoin are added to perform an opening ring reaction; after the reaction is completed, hydrochloric acid is directly added to perform a rearrangement reaction; then water is separated and methanol is added in the organic layer to perform an ozonation reaction; then sodium sulfite is added to perform a reduction reaction; then hydrochloric acid is added to perform a methyl esterification reaction, so as to obtain the eplerenone intermediate N-1 crude product, and finally the eplerenone intermediate N-1 fine product is obtained through refining. The method realizes the one-pot synthesis of the eplerenone intermediate N-1 from the eplerenone intermediate N-4 through the continuous reactions of opening ring, rearrangement, ozonation, reduction and methyl esterification, and can avoid column chromatography purification, so that the method becomes a green chemical process route with greatly reduced organic solvent consumption and wastewater.

The invention belongs to the technical field of desulfurization environmental protection, and particularly relates to a process method for extracting a sodium sulfite product through sodium desulfurization post-treatment and a dust removal device. Comprising the following steps: absorbing saturated desulfurization mother liquor in a desulfurization device, conveying the saturated desulfurization mother liquor into a desulfurization mother liquor tank by a slurry discharge pump, adding a sodium hydroxide solution with a certain concentration into the desulfurization mother liquor tank, and reacting and crystallizing to separate out a certain amount of sodium sulfite crystals; conveying the slurry in which a certain amount of crystals are separated out into a cyclone separator through a desulfurization mother liquor pump, and carrying out solid-liquid pre-separation in the cyclone separator; according to the invention, industrial waste gas generated after extraction of sodium sulfite can be reused, and pollution is reduced; the filtering membrane adsorbing sodium sulfite can be thoroughly cleaned; the unextracted sodium sulfite mixed in the dried and separated waste gas can be fully extracted and recovered, so that the extraction rate is increased; and stacking and packaging are carried out while the sodium sulfite is recycled, so that the collecting and packaging efficiency is improved.

The embodiment of the invention discloses a standard substance for simulating biological Zeta potential detection and a preparation method thereof. The method comprises the following steps: (1) preparing a 100-500nm carboxylated nano-microsphere suspension by adopting an emulsion polymerization method; (2) carrying out suction filtration on the 100-500nm carboxylated nano-microsphere suspension through a filter membrane to obtain filtrate; and (3) preparing a phosphate buffer solution with a standard concentration by using the filtrate as a solvent, adding lauryl sodium sulfate, and aging to obtain the standard substance for simulated organism Zeta potential detection. The standard substance provided by the invention can be used for calibrating and verifying a Zeta potential detection instrument, so that the detection accuracy and reliability are improved; meanwhile, the material can be used as an important tool for researching the property and function of surface charges of biomolecules, powerful support is provided for research in the fields of biomedicine and material science, and in addition, the preparation method has the advantages of being simple in process, high in repeatability and capable of simulating Zeta potentials of different biological systems and has a good application prospect.

A pest control composition includes from about 4 wt % to about 10 wt % of sodium lauryl sulfate; one or more C5 to C9 hydrotropic salt; from about 1 wt % to about 10 wt % of one or more active ingredients selected from the group consisting of corn mint oil, peppermint oil, spearmint oil, rosemary oil, thyme oil, citronella oil, clove oil, cedarwood oil, cinnamon oil, geranium oil, eugenol, 2-phenylethyl propionate, menthol, menthone, thymol, carvone, camphor, methyl salicylate, p-cymene, linalool, geraniol, cinnamyl acetate, cinnamic alcohol, cinnamaldehyde, citronellol, eucalyptol / 1,8-cineole, alpha-pinene, bornyl acetate, gamma-terpinene, and combinations thereof; and from about 60 wt % to about 95 wt % of water. The pest control composition exhibits a water peak in a 2H spectrum having a width encompassing 90% of the area of the entire water signal of about 50 Hz or more, as determined by the 2H NMR Method.

The present disclosure relates to new methods and processes of byproduct conversion, wastewater remediation, byproduct upcycling / recycling, and sustainable cyclic methods thereof.

The invention discloses a long-life power lead-acid storage battery based on electrolyte-polar plate synergistic modification, and relates to the technical field of lead-acid storage batteries. According to the invention, the carbon nanotubes, the potassium sodium tartrate and the sodium sulfate are added into the electrolyte of the lead-acid storage battery, the graphene and the lanthanum oxide are doped into the positive active material, and the surface of the negative electrode is coated with the polypyrrole layer, so that the synergistic modification of the electrolyte and a polar plate is realized; according to the design, the conductivity is remarkably improved, the polar plate vulcanization is inhibited, and the structural stability is enhanced, so that the cycle life and the capacity retention ratio of the battery are greatly improved.

The invention discloses a compound fluralab chewable tablet and a preparation method thereof, and relates to the technical field of veterinary drug preparations, the chewable tablet is composed of fluralab, pyrantel and moxidectin solid dispersion constructed by poloxamer 407 / lauryl sodium sulfate (or sodium dodecyl sulfate); preferably, the particle size D50 of the dispersion is 5-30 microns, and D90 is less than or equal to 80 microns. The preparation method comprises the following steps: firstly, dissolving moxidectin in the system to form a clear solution, drying under reduced pressure, and grinding and sieving at low temperature to obtain a dispersed material; premixing with microcrystalline cellulose, then mixing with lactose, adding a disintegrating agent and a lubricating agent, and carrying out prepressing-main pressing two-stage tabletting to obtain the tablet. The system can maintain amorphous distribution of moxidectin in the tablet, the content uniformity and dissolution and acceleration stability are remarkably improved, broad-spectrum synergy is formed by the moxidectin, the fluralasodium and the pyrantel, and the moxidectin tablet is suitable for killing fleas and ticks, treating roundworms and hookworms and preventing canine heart filariasis and tubuloidiasis.

The application discloses a methyl sulfonate derivative and a preparation method and application thereof. The preparation method comprises the following steps: (1) adding carboxylic acid, dimethyl sulfoxide (DMSO) and potassium fluoride (KF) into a pressure-resistant reaction bottle, and heating at 180 DEG C for 6 hours through an oil bath; (2) after the reaction is completed, the obtained substance is extracted with ethyl acetate for three times, the organic layer is washed with water for two times in sequence, the washed organic layer is dried with anhydrous sodium sulfate, filtration is conducted, and a filtrate is obtained; (3) the obtained filtrate is concentrated under reduced pressure, the concentrated residue is separated and purified by using a silica gel column chromatography, and the methyl sulfonate derivative is obtained. The preparation method directly uses KF to catalyze the reaction of carboxylic acid and DMSO, does not need to use complex substrates, noble metal catalysts and phosphorus ligands, and has the advantages of simple operation, greenness, low cost and high yield (up to 92%).

The invention discloses a preparation method of sodium fluorosulfate, which comprises the following steps: mixing sodium pyrosulfate and ammonium fluoride in an aprotic polar solvent, and reacting at 50-200 DEG C to generate sodium fluorosulfate; after the reaction is finished, separating to obtain a solution containing sodium fluorosulfate; concentrating the solution, and adding an anti-solvent to induce sodium fluorosulfate crystallization; and separating to obtain sodium fluorosulfate. According to the invention, safe and easily available ammonium fluoride and sodium pyrosulfate are adopted as raw materials, one-step reaction is carried out in a mild aprotic polar solvent system, and an anti-solvent crystallization process is combined, so that efficient preparation of sodium fluorosulfate with high purity, low acid value and no chloride ion residue is successfully realized; and the problems of dependence on high-risk raw materials and serious pollution of byproducts in the prior art are solved.

The invention relates to the technical field of switch valves, in particular to a switch valve for sodium persulfate production, which comprises a gas source, a valve body assembly and a sealing assembly, the valve body assembly comprises a valve body, the valve body comprises a hollow cylinder and a connecting rod, and the connecting rod is vertically connected to the outer wall of the hollow cylinder; a transmission channel and an airflow channel are arranged in the connecting rod and penetrate through the outer wall of the hollow cylinder; the sealing assembly comprises a second air source valve and a sealing ring, and the sealing ring is made of an elastic material; a plurality of cavities are formed in the sealing ring and are communicated with the airflow channel; the second air source valve is communicated with the air source, the outside and the airflow channel; by additionally arranging the additional airflow channel, intermittent inflation and deflation can be carried out by utilizing an air source when medium flow is generated in a discharging state, and sodium persulfate crystallized on the surface of the sealing ring is repeatedly extruded and stretched by combining with an elastic material, so that the sodium persulfate is crystallized and broken and then is taken away by a medium flow; and an emergency leaking stoppage effect can also be achieved.

The invention belongs to the technical field of detergent compositions, and discloses a detergent composition and a preparation method thereof, and the composition comprises the following components in percentage by mass: 0.5-3% of organic salt, 0.5-3% of a surfactant, 0.5-3% of a preservative, and the balance of water. 0.2%-8% of monoethanolamine; 25%-60% of a total surfactant; 4%-15% of low carbon alcohol; and the balance of deionized water. Wherein in the total surfactant, the content of sodium alkyl sulfate and the content of sodium ethoxylated fatty alcohol sulfate are both 0. In the detergent composition disclosed by the invention, the surfactant does not contain sodium alkyl sulfate and ethoxylated sodium alkyl sulfate, so that the low-temperature stability of the detergent composition is enhanced, the detergent composition is not gelatinized due to a low-temperature environment, and the detergent composition does not crust after water loss, can keep a clear flowable state and avoids reducing the cleaning effect; and even a feeding port is blocked in the automatic feeding device, so that the use is influenced.

The invention provides Cr (VI) ion imprinted biomass carbon aerogel microspheres and a preparation method and application thereof.The preparation method comprises the steps that a bubble-rich mixed solution of gelatin, chitosan, glacial acetic acid, sodium bicarbonate and lauryl sodium sulfate is dripped into alkali liquor, and Cr (VI) ion imprinted biomass hydrogel microspheres are obtained through a surface ion imprinting technology; and carrying out freeze drying and high-temperature carbonization to prepare the Cr (VI) ion imprinted biomass carbon aerogel microspheres. The inner part of the large-hole interconnected thin-wall structure is of a three-dimensional interpenetrating network structure. When the pH value is equal to 2, the Cr (VI) ion imprinting biomass carbon aerogel microsphere has a Cr (VI) ion removal rate of 99% or above, has a wide pH working range, and has a Cr (VI) ion removal rate of 70% or above when the pH value is equal to 1-5. In the presence of interfering ions, the selectivity coefficient K value of the Cr (VI) ion imprinted biomass carbon aerogel microspheres to Cr (VI) ions is far greater than 1, and the Cr (VI) ion imprinted biomass carbon aerogel microspheres have a relatively large relative selectivity coefficient K'value, and still show the highest adsorption capacity to the Cr (VI) ions in the coexistence of various heavy metal ions.

The application belongs to the technical field of chemical synthesis, and particularly relates to a preparation method of diisopropyl peroxydicarbonate and application of the diisopropyl peroxydicarbonate. The preparation method comprises the following steps: firstly, isopropyl chloroformate and an ester-soluble organic solution are added into a three-necked flask, stirring is started, hydrogen peroxide solution is added, when the temperature of the mixture in the flask is stabilized at-5 DEG C, sodium hydroxide solution is slowly added into the three-necked flask, and the time and temperature in the reaction process are controlled; finally, the organic phase is separated, washed with water, dried with anhydrous sodium sulfate, and obtained. The preparation method is safe and controllable, the yield of the diisopropyl peroxydicarbonate is high, the stability is good, the diisopropyl peroxydicarbonate can be directly used for the preparation of polyvinylidene fluoride, a chain transfer agent is not needed, polymerization can be carried out under low-temperature conditions, the molecular chain regularity of the polyvinylidene fluoride is improved, abnormal structures are few, the crystallinity is high, and the comprehensive performance is good.

The invention relates to the technical field of concrete crack repair, in particular to an electro-deposition repair assistant and an electro-deposition repair method for concrete cracks, and the electro-deposition repair assistant is composed of a solid component A and a solid component B which are independently packaged; the solid component A is prepared from the following raw materials: beta-cyclodextrin and boric acid; the solid component B is prepared from the following raw materials: lauryl sodium sulfate and sulphobetaine; the mass ratio of the solid component A to the solid component B is 1: 1. According to the invention, the deposition uniformity of zinc ions in concrete cracks is remarkably improved through the electro-deposition repairing auxiliary agent, so that a uniform and compact deposition layer is formed at the repaired cracks, the integrity and stability of a concrete structure are effectively enhanced, meanwhile, the formation of zinc dendrites is inhibited, the defects of the repairing layer and the structural damage caused by the growth of the zinc dendrites are reduced, and the service life of the concrete is prolonged. And the repairing quality and durability are improved.

The present application relates to sewage treatment technical field, specifically to a kind of chemical wastewater desalination integrated processing method.The present application overcomes the problem of low resource utilization efficiency of chemical wastewater desalination in prior art;The present application first synthesizes three-dimensional catalytic aerogel microspheres, which are loaded in a fixed bed to target adsorption and catalytic chain scission of macromolecular polymers in high-salinity wastewater with persulfate;Subsequently, a salt-tolerant membrane bioreactor is introduced to form small-molecule organic compounds through deep metabolism;The effluent is sequentially subjected to target complexation and precipitation of heavy metals using modified chitosan and amphoteric polyacrylamide, pre-implantation of polyepoxysuccinic acid scale inhibitor, and finally subjected to nanofiltration and reverse osmosis systems, freeze crystallization and MVR evaporation to extract high-purity sodium sulfate and sodium chloride.The present application effectively solves the problem of membrane fouling caused by heavy metal leakage and organic matter residue in traditional process, and realizes the deep purification of chemical wastewater and the high-value resource recovery of salt.

The invention relates to a synthesis method of sulfopropionic anhydride. The synthesis method comprises the following steps: (1) mixing 3-bromopropionic acid and sodium sulfite in water, and carrying out sulfonation reaction to obtain a mixture; (2) mixing the mixture with an acidifying agent, and carrying out acidification reaction to obtain 3-sulfonyl propionic acid; and (3) mixing the 3-sulfonyl propionic acid with a dehydrating agent and an organic solvent, and carrying out a dehydration reaction to obtain the sulfopropionic anhydride. According to the invention, compounds such as 3-bromopropionic acid and sodium sulfite are used as reaction raw materials to prepare sulfopropionic anhydride. The method has the advantages of cheap and easily available raw materials, simple operation and high yield, and is suitable for large-scale production.

The application discloses heparin sodium cream and a preparation method thereof, and belongs to the technical field of pharmaceutical preparation production. The heparin sodium cream comprises the following components: heparin sodium, propylene glycol, hydroxyphenyl ethyl ester, sodium dodecyl sulfate, glycerol monostearate and distearate, octadecanol, liquid paraffin, white vaseline and water. The preparation method comprises the following steps: preparing an oil phase and mixing an aqueous phase; taking part of the mixed aqueous phase and the oil phase to form a water-in-oil type primary emulsion; then adding the remaining mixed aqueous phase into the primary emulsion, inducing phase transition into an oil-in-water type cream under mild conditions, and obtaining the finished product after vacuum defoaming and gradient cooling. The application realizes high-efficiency emulsification under mild conditions below 80 DEG C and 3000 rpm through a controlled phase inversion emulsification process, so that the particle size (D99) of the emulsion droplets is less than 5 microns, and the problem that the active substance heparin sodium loses activity under severe conditions is solved completely, and the stability of the product is improved significantly.

The invention belongs to the technical field of batteries, and particularly relates to an electrolyte additive for a zinc-nickel battery with a long cycle life and an electrolyte. The electrolyte additive comprises indium oxide and a surfactant, the surfactant comprises sodium dodecyl benzene sulfonate, lauryl sodium sulfate and a fluorine-containing anionic-nonionic ampholytic surfactant, and the fluorine-containing anionic-nonionic ampholytic surfactant is prepared by the following steps: firstly, carrying out free radical addition on perfluorohexyl ethyl iodide and allyl polyoxyethylene ether; and then carrying out sulfonation reaction on the terminal hydroxyl of the addition product. The indium oxide and the surfactant prepared by the invention have a synergistic effect in the electrolyte, and the cycle life of the zinc-nickel battery at high and low temperatures can be improved at the same time.