123 results about "Sulfite" patented technology

The invention relates to the technical field of oilfield chemistry, and discloses a graft modified cellulose filtrate reducer and a preparation method thereof.The preparation method comprises the following steps that modified hydroxyethyl cellulose, 2-acrylamide-2-methyl propane sulfonic acid, dimethyl diallyl ammonium chloride, alkenylated cardanol and N, N '-methylene bisacrylamide are added into deionized water, stirring is conducted, and a mixture is obtained; the preparation method comprises the following steps: adding cellulose into a reaction kettle, stirring for 10-15 minutes at the temperature of 40-60 DEG C at the speed of 300-400 rpm, dropwise adding ammonium persulfate and sodium hydrogen sulfite into a system, and continuously reacting for 4-6 hours to obtain the grafted modified cellulose filtrate reducer. The filtrate reducer disclosed by the invention has good high temperature resistance and salt resistance.

The invention discloses a method for preparing erythritol bicyclic ethylene sulfate through efficient catalysis, which comprises the following steps: reprocessing a commercially available titanium silicalite molecular sieve, and reacting intermediate erythritol bicyclic ethylene sulfite (BES) and hydrogen peroxide under the action of a self-made catalyst to obtain the target product erythritol bicyclic ethylene sulfate (BDTD), the yield is 88%; and the obtained product is recrystallized to obtain the product with the purity of more than 99.5%, and the solvent and the catalyst used in the process can be recycled. The raw materials and auxiliary materials are commercially available, low in price and easy to obtain, the reaction yield is high, the product purity is high, the process cost is low, and the method is environmentally friendly, suitable for industrialization and extremely high in social use value and application prospect.

The invention relates to the technical field of sewage treatment, in particular to a metal sulfide nanoparticle slow-release activator for sewage treatment and a preparation method of the metal sulfide nanoparticle slow-release activator for sewage treatment. The surface of the core layer is coated with the porous silicon dioxide membrane shell layer; the citric acid modifier is loaded on a core-shell interface; according to the invention, metal sulfide (such as FeS, MoS2, WS2 and the like) micro-nano particles are used as a solid-phase slow-release activator, so that the core problem of a traditional homogeneous activation system is radically solved. Firstly, the metal sulfide exists in the form of a solid phase and can directly contact and react with permanganate without an additional dissolving step, so that the problem of complicated process operation caused by poor solubility of activating agents such as sulfite is thoroughly avoided, and the process of reclaimed water treatment is simplified. The problem of poor continuous oxidation effect of a traditional homogeneous system is thoroughly solved.

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 provides a reverse osmosis optimal dosing system and method based on ultraviolet sterilization, and the method comprises the following steps: firstly, the system monitors the influent microorganism load and water quality in real time, dynamically calculates the required ultraviolet dosage, and precisely adjusts the power of an ultraviolet sterilizer; secondly, according to the residual microorganism risk and the water inlet flow after ultraviolet treatment, the feeding amount of an oxidizing bactericide (such as sodium hypochlorite) is accurately adjusted according to a PID control strategy combining feedforward and feedback; meanwhile, according to the oxidation-reduction potential of the sterilized water body, a reducing agent (such as sodium hydrogen sulfite) is intelligently added to protect the reverse osmosis membrane. And finally, efficient cooperation of ultraviolet physical sterilization and chemical sterilization is achieved, on the premise that strict control over microbial pollution is guaranteed, the consumption and operation cost of chemical agents are remarkably reduced, generation of by-products is reduced, the service life of a reverse osmosis membrane is prolonged, and the intelligent level of system operation and the overall economic benefits are improved.

The invention belongs to the technical field of biological detection, and particularly relates to a bisulfite-free detection kit for specific site 5-methylcytosine and a detection method thereof. According to the method, a TAPbeta treatment method is adopted, 5hmC is sealed through beta-GT, 5mC oxidation is carried out through TET, and 5mC is reduced into dihydrouracil (DHU) through pyridine borane, so that the apparent difference between 5mC and C and 5hmC is converted into single nucleotide polymorphism difference. In addition, a flow microsphere technology based on PNA-assisted click chemical connection starting is established to detect DNA methylation specific sites. A PNA clip is innovatively introduced into click chemical connection, and non-specific connection is inhibited. Target sequence enrichment, signal amplification and signal acquisition are carried out through surface-functionalized magnetic nanoparticles, and the detection sensitivity is improved to fM. The invention provides a new tool for high-specificity and high-sensitivity epigenetic marker detection.

The invention relates to the technical field of sewage treatment, in particular to a biological enzyme-containing deodorizing and antibacterial composition for sewage treatment. The biological enzyme-containing deodorizing and antibacterial composition for sewage treatment is prepared from the following raw materials in parts by mass: 1 to 3 parts of a compound biological enzyme preparation, 5 to 15 parts of bamboo charcoal powder, 1 to 2 parts of chitosan, 1 to 3 parts of dopamine, 0.005 to 0.024 part of glutaraldehyde, 10 to 30 parts of bentonite, 1 to 5 parts of graphene, 1 to 3 parts of nano silicon dioxide, 10 to 20 parts of wood flour, 5 to 10 parts of sodium hydrogen sulfite and 1 to 5 parts of sodium carboxymethyl cellulose. 1-2 parts of polyacrylamide and 1-5 parts of a nonionic surfactant. The composition disclosed by the invention forms a synergistic effect, can remove most suspended matters and metal ions in sewage, can quickly catalyze and decompose organic matters into water-soluble small molecular compounds such as organic acid and alcohol, efficiently and remarkably reduces the contents of nitrogen and phosphorus in the sewage and purifies a water body.

The invention provides an environment-friendly low-chlorine wet strength agent and a preparation method and application thereof.The preparation method comprises the steps that adipic acid and tetraethylenepentamine are mixed and react for 2-6 h at the temperature of 170-190 DEG C, and a prepolymer is obtained; cooling the prepolymer to 120-140 DEG C, adding a modifier, carrying out a heat preservation reaction for 2-3 h, and adding deionized water to adjust the solid content to 55-65% so as to obtain a modified polyamide solution; adding a cationizing agent and epoxy chloropropane into the modified polyamide solution, heating to 65-75 DEG C, reacting, and adding acid to adjust the pH value to 2.5-4.5 when the viscosity of the system reaches 50-80 mPa.s; adding sodium hydrogen sulfite, and carrying out heat preservation reaction for 1-2 hours; and adding deionized water to adjust the solid content to 12-13%, thereby obtaining the environment-friendly low-chlorine wet strength agent. The specific modifier is adopted to modify a polyamide main chain, and the cationizing agent is introduced, so that the prepared wet strength agent not only can remarkably reduce the content of organic chlorine in a product, but also can improve the dry and wet strength, water resistance and folding resistance of paper. In addition, the product can also shorten the curing time of the paper.

Systems and methods are provided for using electrolytic compositions in lithium ion batteries. In one example, an electrolytic composition may include vinylene carbonate, fluoroethylene carbonate, 1,3-propane sultone, ethylene sulfite, and a conducting salt including no less than 80 mol % of lithium bis(fluorosulfonyl)imide. In this way, a capacity retention of the lithium ion battery may be maintained, such as during high-temperature storage at 100% state of charge.

The invention relates to the technical field of cosmetics, in particular to a method for improving the stability of a sialic acid-p-hydroxyacetophenone solution. The method comprises the following steps: mixing p-hydroxyacetophenone with a stabilizer, and then mixing with sialic acid to obtain sialic acid-p-hydroxyacetophenone mixed liquor; the stabilizer is sulfite and / or hydrosulfite, and the addition amount of the stabilizer is 0.005%-0.2% by mass. Aiming at the problems of discoloration of sialic acid-p-hydroxyacetophenone solution and loss of sialic acid, the invention provides a method, all the raw materials are mixed according to a specific sequence on the basis of a specific stabilizer through a specific processing technology, the stability of the obtained solution is remarkably improved, the solution does not discolorate after being placed for a long time, the loss rate of sialic acid is low, and the method is suitable for industrial production. The method has important application value in the field of production of cosmetics containing sialic acid at the same time.

The invention relates to a method for preparing ethylene sulfate, which comprises the step of performing catalytic oxidation reaction on ethylene sulfite under the action of a nitrogen oxide catalyst in an oxidizing gas atmosphere containing oxygen to obtain an ethylene sulfate product in one step. Wherein the oxidizing gas containing oxygen is first mixed gas of oxygen and nitrogen, and based on the total volume of the first mixed gas, the volume fraction of the oxygen is 20-80%. The method disclosed by the invention is green and environment-friendly, low in cost, high in selectivity, safe to operate and simple in process.

The invention relates to construction waste recycled aggregate concrete and a preparation method thereof, relates to the technical field of concrete, and improves the workability and durability of the concrete by reasonably proportioning a modified water reducing agent with other raw materials. Wherein the modified water reducing agent is prepared by carrying out primary esterification on maleated rosin and a monomer containing hydroxyl, then carrying out dicarboxylation on the modified water reducing agent and sulfonating the modified water reducing agent through sulfite, has a hydrophobic skeleton and carboxyl and sulfonic acid double hydrophilic groups, and can strongly adsorb cement particles, form a static electricity and steric hindrance double effect, disperse a cement binding material and release water; and workability loss and shrinkage cracking caused by high water absorption of the recycled aggregate are inhibited. The concrete prepared by the invention has the advantages of good water reducing property, good strength and difficulty in collapsing.

The invention provides an efficient sulfite detection method and system based on microwave sensing, and belongs to the technical field of sulfite detection.The efficient sulfite detection method comprises the steps that a microwave sensing chip is used for detecting the change of the dielectric property of an H2O2 solution due to SO2 generated by reaction of diluted hydrochloric acid and a sulfite solution; the microwave sensing chip transmits a detected signal to the vector network analyzer for analysis and processing and transmits the signal to the terminal, and the terminal outputs the ion concentration in the solution, so that real-time online monitoring is realized, and the system is suitable for environment, food and industrial scenes.

This invention obtains a stable ezetimibesimvastatin pharmaceutical composition by combining β-cyclodextrin and sulfite antioxidants. This pharmaceutical composition has better stability and satisfactory dissolution effect than the reference formulation. Furthermore, the preparation method of the ezetimibesimvastatin pharmaceutical composition of this invention is simple, the process does not require the use of organic solvents, and no special treatment is required, making it very suitable for industrial production.

The invention provides a cobalt-based microgel material as well as a preparation method and application thereof. The catalytic oxidation activity, stability and universality of the cobalt-based material to sulfite are effectively improved on the basis of the synergistic effect of constructing a microgel structure through reduction of sodium borohydride and regulating and controlling the boron loading amount to optimize catalytic active sites. The specific boron loading amount induced electron interaction between Co-O-B changes the electron cloud distribution and bonding environment of Co, so that the number and distribution of catalytic active sites are effectively regulated and controlled, and the pore structure of the microgel is stabilized, thereby promoting efficient contact between sulfite and the active sites; a stable microgel structure is formed through a liquid phase reduction-gelation process, agglomeration or loss of active components can be avoided, a proper amount of boron loading can prevent pore channel blockage, the problem of catalytic activity attenuation under high loading capacity can be effectively relieved, meanwhile, catalytic requirements of different sulfites are met, and the application range of the material is widened.

Chiral isomeric sulfite compounds, and preparative separation and application of chiral structures thereof are disclosed,. which belong to the technical field of agriculture. The present disclosure has found that the chiral isomeric sulfite compounds having the structure of general formula (A) have excellent inhibitory activities against pest eggs, especially have strong inhibitory activities against eggs of thrips, mites, Lepidoptera moths, Aleyrodidae and Harmonia axyridis, and meanwhile have germicidal activity, and their absolute configuration are obtained through preparative separation. The compounds with such structures can be used for killing pest eggs and germs, and have high research value of agrochemical, having broad application prospects in the field of agricultural pharmacy. 20 25 20 23 00 31 M ar 2 02 5 2 0 2 5 2 0 2 3 0 0 3 1 M a r 2 0 2 5

The invention discloses anionic polyacrylamide for accelerating particle sedimentation of copper ore pulp. The anionic polyacrylamide is prepared from the following components in parts by weight: 110 to 120 parts of acrylamide, 15 to 20 parts of acrylic acid, 5 to 6 parts of urea, 0.001 to 0.005 part of sodium formate, 0.001 to 0.003 part of EDTA-2Na (Ethylene Diamine Tetraacetic Acid), 0.01 to 0.03 part of ammonium persulfate, 0.01 to 0.025 part of sodium hydrogen sulfite and 360 to 370 parts of deionized water. The invention also provides a preparation method of the anionic polyacrylamide. The anionic polyacrylamide disclosed by the invention can accurately adapt to the characteristics of the copper ore pulp, efficiently accelerate particle sedimentation of the copper ore pulp, and can form a stable and compact flocculating agent.

The present disclosure provides systems and methods for degrading per- and poly-fluoroalkyl substances (PFAS) using hydrated electrons generated in an ultraviolet (UV) / sulfite system. These systems and methods may be used, e.g., to remediate wastewater by destroying PFAS and co-contaminants such as chlorinated volatile organic compounds (CVOCs).

Chiral isomeric sulfite compounds, and preparative separation and application of chiral structures thereof are disclosed, which belong to the technical field of agriculture. The present disclosure has found that the chiral isomeric sulfite compounds having the structure of general formula (A) have excellent inhibitory activities against pest eggs, especially have strong inhibitory activities against eggs of thrips, mites, Lepidoptera moths, Aleyrodidae and Harmonia axyridis, and meanwhile have germicidal activity, and their absolute configuration are obtained through preparative separation. The compounds with such structures can be used for killing pest eggs and germs, and have high research value of agrochemical, having broad application prospects in the field of agricultural pharmacy.

This invention discloses a method and system for recovering high-purity potassium bicarbonate and potassium sulfate from dust collected during blast furnace ferromanganese smelting. It proposes for the first time a technical route for recovering potassium bicarbonate and potassium sulfate by washing blast furnace ferromanganese smelting dust. Addressing the characteristics of the ash washing wastewater, pre-oxidation coupled with reduction impurity removal achieves efficient removal of sulfite and high-valence iron and manganese ions without introducing new impurities, significantly improving the purity of the recovered potassium salts. Secondly, considering the difficulty and cumbersome operation of separating carbonate, sulfate, and chloride ions, and taking into account the carbon dioxide consumption required for potassium bicarbonate preparation, the invention employs acid hydrolysis of carbonates to recover carbon dioxide, recycling carbon, and controlling the liquid-phase anion composition to co-produce high-purity potassium bicarbonate and potassium sulfate, reducing the cost of bicarbonate recovery and the difficulty of salt separation. Simultaneously, it achieves zero emissions of wastewater and waste gas.

The application discloses a compound amino acid injection (15-HBC) composition and a preparation method thereof, and belongs to the technical field of medicines. The compound amino acid injection (15-HBC) composition provided by the application comprises the following components in an amount of 250mL of the composition: isoleucine 1.532-2.298g, leucine 2.756-4.134g, lysine acetate 1.160-1.740g, methionine 0.500-0.750g, phenylalanine 0.640-0.960g, threonine 0.400-0.600g, tryptophan 0.180-0.270g, valine 1.772-2.658g, alanine 0.800-1.200g, arginine 1.160-1.740g, histidine 0.320-0.480g, proline 1.260-1.890g, serine 0.660-0.990g, glycine 0.660-0.990g, cysteine hydrochloride 0.040-0.060g, and appropriate amount of glacial acetic acid for pH adjustment, and the rest is injection water. The application also provides a preparation method of the compound amino acid injection (15-HBC) without sulfite antioxidant. Meanwhile, the activated carbon adsorption process is removed in the preparation, the control of raw material packages, production processes and the like is strengthened to control bacterial endotoxins, the production process is simplified, and the product quality is ensured.

The invention discloses a device and a method for efficiently and continuously preparing ethylene sulfite and byproduct hydrogen chloride gas in an energy-saving manner. The device comprises at least two reaction raw material adding tanks, a reactive distillation low-pressure tower T2, a compressor C1 and a reactive distillation high-pressure tower T3, wherein the inlet of the reactive distillation low-pressure tower T2 is connected with reaction raw material adding tanks, and the at least two reaction raw material adding tanks at least respectively provide anhydrous ethylene glycol and thionyl chloride; an outlet in the top of the reactive distillation low-pressure tower T2 is sequentially connected with a compressor C1 and a reactive distillation high-pressure tower T3; collecting ethylene sulfite at an outlet in the bottom of the reactive distillation low-pressure tower T2; and hydrogen chloride gas is collected at the top of the reactive distillation high-pressure tower T3. The device further reduces the energy consumption, saves the investment cost, has the characteristics of simple process flow, less equipment, low cost, simplicity in operation, high yield, low energy consumption, green process and the like, and the product purity is high and can reach 99.99% or above.

Methods of determining methylation of DNA are provided that include filtering a biological sample comprising a nucleic acid with a first matrix material to purify the DNA; eluting and denaturing the DNA to produce eluted denatured DNA; heating the DNA in the presence of bisulfite ions to produce deaminated nucleic acid; optionally contacting said deaminated nucleic acid with a second matrix material; desulphonating and eluting the bound deaminated nucleic acid; and performing methylation specific PCR, nucleic acid sequencing, and / or high resolution melting analysis (HRM) on said bisulfite-converted nucleic acid to determine the methylation of said nucleic acid, wherein multiple steps may be performed in a single reaction cartridge.

The application provides a synthesis method of 1,4-butanediol sulfonic acid lactone, and aims to provide a synthesis method of 1,4-butanediol sulfonic acid lactone which uses tetrahydrofuran as a raw material, is low in price and easy to obtain, reduces a chlorination reaction, reduces the generation of by-products, is simple in reaction, easy to operate and high in industrial value, and the technical scheme is that sulfite and tetrahydrofuran are subjected to a free radical addition reaction under the action of a free radical initiator to obtain 4-hydroxybutane sulfonate in one step, and the 4-hydroxybutane sulfonate is acidified and ring-closed to obtain 1,4-butanediol sulfonic acid lactone; and the application relates to the technical field of chemical industry.

The invention relates to a sulfite compound and a preparation method and application thereof, a composition and a method for preventing and controlling pest mites, the compound has a structure as shown in a formula (I), and based on the total amount of substance of isomers of (1S, 2S) configuration and (1R, 2R) configuration in the compound with the structure as shown in the formula (I), the content of stereoisomers of the (1S, 2S) configuration is more than 60 mol%. Compared with ethynylite, the sulfite compound shown in the formula (I) can achieve a better acaricidal effect at a lower use concentration.

The invention discloses a cilnidipine injection and a preparation method thereof, and belongs to the technical field of medicines. The cilnidipine injection mainly comprises cilnidipine, a cosolvent, a solubilizer, a stabilizer, an osmotic pressure regulator and water for injection, wherein the cosolvent comprises one or more of polyethylene glycol 400, propylene glycol and ethanol; the solubilizer comprises Tween 80 and SDS (sodium dodecyl sulfate); the stabilizer comprises sodium pyrosulfite and sodium hydrogen sulfite. The cilnidipine injection prepared by the invention not only has the characteristics of high in-vivo bioavailability, good stability, small use amount of solubilizer, medication safety and the like, but also is simple in preparation process, convenient to operate, low in production cost and suitable for industrial large-scale production.

The invention belongs to the technical field of ion detection, and particularly relates to a preparation method of a long-wavelength emission fluorescent probe for rapidly detecting bisulfite, which comprises the following steps: dissolving isophorone and malononitrile in ethanol to obtain a product 1; 3-bromoquinoline and 5-formyl-2-thiopheneboronic acid are dissolved in a mixed solvent of dry methanol and dry toluene, and a product 2 is obtained; dissolving the product 2 in dichloromethane, and adding methyl trifluoromethanesulfonate to obtain a product 3; and dissolving the product 1 and the product 3 in ethanol, and adding piperidine to obtain the required fluorescent probe LSQ. Dissolving the obtained fluorescent probe LSQ in DMSO to prepare mother liquor A; a target product is obtained. The fluorescent probe provided by the invention has the advantages of high-selectivity rapid response to bisulfite, long-wavelength emission, no organic solvent detection, simple synthesis route and simple and convenient detection equipment and method, and can be used for qualitative and quantitative detection of bisulfite in food and biological systems.

The invention belongs to the technical field of environmental functional material preparation and heavy metal pollution control, and particularly relates to a method for preparing sulfurized nano zero-valent iron (S-nZVI) based on low-sulfite rheological phase reaction and application of the S-nZVI in heavy metal wastewater treatment. The method comprises the following steps: mixing and grinding an iron source and a low sulfite solid according to a certain molar ratio to form a rheological phase precursor; in the presence of inert atmosphere and trace water, heating in a closed reactor to perform rheological phase reduction reaction, so that S-S bonds in the low sulfite are broken to release electrons, iron ions are reduced into Fe (0) cores, iron sulfide layers are synchronously formed on the surfaces of the Fe (0) cores, and after the reaction is finished, cooling, washing and drying are performed to obtain the S-nZVI with the core-shell structure. The material has the characteristics that the specific surface area is high (greater than or equal to 85 m / g), the Fe (0) core size is 5-20 nm, and the outer layer is an amorphous iron sulfide layer, and has efficient adsorption capacity on heavy metal ions such as Cr (VI), As (III), Pb (II), Cd (II) and the like. The method is simple in process, green, efficient and low in cost, and a new scheme is provided for heavy metal wastewater treatment and recycling.

The present application relates to the technical field of lithium ion batteries, and provides a lithium ion battery, which comprises a battery cell and an electrolyte, and the battery cell comprises a positive electrode sheet, a diaphragm and a negative electrode sheet which are arranged in a stack, the positive electrode sheet body has a first surface and a second surface which are opposite to each other along the thickness direction, a plurality of protruding parts exist on the first surface of the positive electrode sheet, and corresponding recessed parts exist on the second surface, the electrolyte contains A wt% of a sulfur-containing additive, the sulfur-containing additive comprises at least one of a sulfonate, a sulfate and a sulfite, 0.3≤H / T≤6 and 0.1≤A≤6, wherein H is the height of the protruding part, the unit is μm, T is the thickness of the diaphragm, the unit is μm, 1≤D≤8, and / or 0.3≤Z=H / D≤80, 0.02≤A / Z≤4. The battery has good electrochemical performance and safety performance, can inhibit the generation of lithium dendrites of the negative electrode, and can improve the self-discharge performance and relieve the gas generation in high-temperature storage.

The invention relates to the technical field of polyacrylamide preparation, in particular to a preparation method of nano-clay composite anionic polyacrylamide, which comprises the following steps: S1, adding modified nano-clay, acrylamide, an anionic monomer, a cross-linking agent and a cosolvent into deionized water, and uniformly stirring to obtain a mixed solution; adjusting the pH value of the mixed solution to 7.3-7.5 by using a sodium hydroxide solution, and transferring the mixed solution into a reaction container; s2, placing the reaction container in the step S1 in a constant-temperature water bath, exhausting air, and adding ammonium persulfate and sodium hydrogen sulfite for reaction to obtain colloid; and S3, drying and crushing the colloid obtained in the step S2 to obtain the product. The prepared polyacrylamide is high in stability, and the viscosity retention rate in a high-temperature and high-salt environment is increased.