102 results about "Thioglycolic acid" patented technology

The invention discloses water-based formaldehyde-free woodworking glue and a preparation method thereof, and relates to the technical field of woodworking glue. When the water-based formaldehyde-free woodworking glue is prepared, firstly, n-butyllithium is used as an initiator to initiate cyclosiloxane and an acrylate monomer to be polymerized, then dimethyl chlorosilane is used for blocking to obtain pre-modified polyacrylate, and the pre-modified polyacrylate is used for preparing the water-based formaldehyde-free woodworking glue. Reacting the pre-modified polyacrylate with vinyl diphenylphosphine, and then reacting with 3-(4-bromophenyl)-1-propylene to obtain modified polyacrylate; secondly, reacting the 4-(trimethoxysilyl) butyraldehyde modified silicon dioxide with chitosan, and then reacting with mercaptoacetic acid to obtain modified silicon dioxide; finally, mixing the modified polyacrylate, the modified silicon dioxide, an emulsifier, a defoaming agent, pure water and a photoinitiator to obtain the water-based formaldehyde-free woodworking glue. The water-based formaldehyde-free woodworking glue prepared by the invention has flame retardance and antibacterial property.

The present invention proposes a light-absorbing film and a preparation method and application thereof, including a preparation method of a copper-vanadium-sulfur / copper-vanadium-selenium / copper-vanadium-sulfur-selenium light-absorbing film based on a solution method, and an application of the light-absorbing film prepared by the method on a solar cell. The preparation method is simple to operate and low in cost. Thioglycolic acid and ethanolamine are used as ligands, and ethylene glycol methyl ether is used as a solvent to adjust the viscosity to prepare a precursor solution; a copper-vanadium-sulfur / copper-vanadium-selenium / copper-vanadium-sulfur-selenium film is prepared by spin coating-sintering mode and adjusting the feed ratio of elements; high-temperature heat treatment is continued for sulfurization / selenization reaction to obtain a large-grain through-type copper-vanadium-sulfur / copper-vanadium-selenium / copper-vanadium-sulfur-selenium film, which can avoid the generation of impurities in the film, and the prepared light-absorbing film is applied to the light-absorbing layer of a solar cell, which is conducive to assembling a copper-vanadium-sulfur-selenium thin film solar cell with high photoelectric conversion efficiency.

The invention discloses an inhibitor for copper-molybdenum separation and a preparation method and application thereof.The inhibitor is a grafted copolymer DG-1 obtained after chitosan and sodium thioglycolate are grafted, the selectivity of sulfydryl to copper ions is enhanced through the product, the adsorption effect on the copper ions is enhanced, and molybdenite is not affected; secondly, a carboxyl group of a grafted product points to ore pulp and has more active sites, so that the solubility and the stability of single chitosan or sodium thioglycolate are enhanced; a third step; the copolymer is relatively simple to prepare and easy to realize, and the economic cost for inhibiting the chalcopyrite is effectively reduced. The inhibitor is used for separating copper and molybdenum and is environmentally friendly, the dosage is relatively small, and the process is simple and efficient.

The invention provides a method for recovering sodium thioglycolate from ethionine ester synthesis wastewater. The method comprises the following steps: firstly adjusting the pH value, converting sodium thioglycollate in the wastewater into thioglycollic acid, then extracting the thioglycollic acid in the synthetic wastewater by adopting an organic phase with a neutral phosphorus extraction agent as a main component, then enriching the sodium thioglycollate in strip liquor through washing and reverse extraction, and adding low alcohol into the strip liquor to change the polarity of the solution, so that the sodium thioglycollate in the wastewater is obtained. The method has the characteristic of low energy consumption, and meanwhile, the purity of the sodium thioglycolate product is high.

The present invention discloses a cross-linked cellulose-based gel polymer electrolyte and a preparation method thereof. The method comprises the following steps: a preparation method of water-soluble allyl cellulose with different degrees of substitution and a preparation method of a cross-linked cellulose-based gel polymer electrolyte. A polymer film is obtained by cross-linking allyl cellulose polyethylene glycol dimethacrylate / polyethylene glycol diacrylate and 1,4-butanediol bis(thioglycolate) with double bonds under ultraviolet irradiation through a thiol-ene click reaction; the polymer film is immersed in a carbonate electrolyte to obtain a cross-linked cellulose-based gel polymer electrolyte. The ionic conductivity and interfacial impedance of the gel polymer electrolyte can be adjusted by changing the degree of substitution of allyl cellulose and the content of polyethylene glycol dimethacrylate / polyethylene glycol diacrylate. The cross-linked cellulose-based gel polymer electrolyte has high ionic conductivity, high interfacial compatibility, high thermal stability and cycling performance.

The utility model relates to the technical field of wastewater treatment equipment, in particular to an isooctyl thioglycolate wastewater treatment device, which can be used for more uniformly adding liquid medicine, effectively accelerating the diffusion of the liquid medicine in wastewater and improving the neutralizing treatment effect of the wastewater. Comprising a treatment box, the bottom end of the treatment box is fixedly connected with four sets of supporting legs, the top end of the treatment box is communicated with a water inlet pipe, the right end of the treatment box is communicated with a drainage pipe, and a valve is arranged on the drainage pipe; belt wheels fixedly sleeve the left ends of the driving shaft and the transmission shaft, a driving bevel gear fixedly sleeves the right end of the transmission shaft, a driven bevel gear fixedly sleeves the dosing pipe, the driving bevel gear is meshed with the driven bevel gear, and a plurality of groups of transverse stirring blades are annularly and fixedly arranged on the outer wall of the flow equalizing cylinder at equal intervals; a plurality of groups of vertical stirring blades are fixedly arranged on the driving shaft at equal intervals.

The invention provides a preparation method of a grinding aid for Sc / O doped sulfide solid electrolyte, which comprises the following steps: mixing and reacting ethanolamine thioglycolate, 2-vinyl-5, 5-dimethyl-1, 3, 2-borane dioxide, 1-allyl-3-ethylimidazolium hexafluorophosphate and potassium ethoxide in a solvent, reacting the ethanolamine thioglycolate with the 2-vinyl-5, 5-dimethyl-1, 3, 2-dioxo-borane, and reacting with the potassium ethoxide to obtain the grinding aid for Sc / O doped sulfide solid electrolyte. The grinding aid for the Sc / O doped sulfide solid electrolyte is prepared by the following steps: carrying out sulfydryl-alkenyl addition reaction on ethanol amine thioglycolate and 1, 2-borane dioxide, carrying out sulfydryl-alkenyl addition reaction on ethanol amine thioglycolate and 1-allyl-3-ethylimidazolium hexafluorophosphate, and removing a solvent after the reaction is finished, so as to obtain the grinding aid for the Sc / O doped sulfide solid electrolyte. The grinding aid can improve the microstructure of the electrolyte material, thereby enhancing the conductivity and safety of the electrolyte material.

The invention relates to the technical field of reinforcing materials, in particular to a mining high-strength inorganic thin-spraying reinforcing material and a preparation method thereof.The inorganic thin-spraying reinforcing material is prepared by blending an adhesive, an environment-friendly cementing material, kaolin, a flexibilizer and an auxiliary. Compounding the waste foam concrete, the steel slag, the mineral slag and the sulphoaluminate cement to prepare an environment-friendly cementing material; the redispersible latex powder and the modified basalt fiber are compounded to serve as a toughening agent; the preparation method comprises the following steps: introducing sulfydryl on basalt fibers by utilizing mercaptoacetic acid, and then grafting a bio-based flame retardant of which one end contains a double bond and the other end contains an antifouling group; the preparation method comprises the following steps: compounding polyvinyl alcohol and modified acrylamide as an adhesive, and preparing the modified acrylamide by taking acrylic acid, 2-acrylamide-2-methylpropanesulfonic acid, acrylamide, N-dodecyl acrylamide and a bio-based flame retardant as raw materials by adopting a photo-initiated micelle polymerization method.

The invention discloses a combined collecting agent in low-grade copper-molybdenum ore and application of the combined collecting agent, and belongs to the technical field of mineral separation. The method comprises the following steps: firstly, adding lime into raw ore as an inhibitor, grinding the ore, adding kerosene and butyl acrylate (or butyl methacrylate) as a combined collecting agent and a foaming agent, carrying out one-time roughing, two-time concentrating and three-time sweeping operation to obtain copper-molybdenum bulk concentrate, stirring the copper-molybdenum bulk concentrate for reagent removal, and then carrying out copper-molybdenum separation operation; sodium sulfide and sodium thioglycollate are added as inhibitors, and copper concentrate and molybdenum concentrate are obtained after one-time roughing, four-time concentrating and three-time sweeping operation; butyl acrylate (or butyl methacrylate) involved in the method has a foaming effect, kerosene and butyl acrylate (or butyl methacrylate) are used as the combined collecting agent, a foaming agent does not need to be added in the process, the ore dressing cost is reduced, and meanwhile efficient recovery of copper-molybdenum minerals is achieved.

The invention relates to the technical field of copper-molybdenum separation inhibitors, and discloses a preparation method of a polythiocarboxylic acid amine copper-molybdenum separation inhibitor, which comprises the following steps of: separating and purifying tail liquid generated by preparing thionocarbamate to obtain sodium thioglycolate, and reacting with carbon disulfide by taking potassium hydroxide as a catalyst to obtain the polythiocarboxylic acid amine copper-molybdenum separation inhibitor. The novel polythiocarboxylic acid amine copper-molybdenum separation inhibitor is obtained. The resource utilization of the thionocarbamate tail liquid is realized, the raw materials are cheap and easy to obtain, and the process is green and environment-friendly. The polythiocarboxylic acid amine copper-molybdenum separation inhibitor has the advantages of being good in adaptability, safe, environmentally friendly, good in inhibition effect, simple in process, wide in production raw material source and the like.

The invention relates to a method for enhancing stability of micron zero-valent iron and heavy metal removal activity through sodium thioglycolate modification, a product and application. The method comprises the following steps: mixing sodium thioglycolate powder with commercial micron zero-valent iron, and carrying out ball milling; and finally, the flaky zero-valent iron material with high stability and high heavy metal removal activity can be obtained, wherein the flaky thickness of the flaky zero-valent iron material is about 300nm, and the content of zero-valent iron is greater than 90%. The prepared mechanochemical sodium thioglycollate modified zero-valent iron material breaks through passivation and inertness of original micron zero-valent iron, the heavy metal removal activity of the micron zero-valent iron is remarkably improved, and the heavy metal removal rate of the micron zero-valent iron is improved by 16.7-88.0 times compared with that of common ball-milled zero-valent iron. The sodium thioglycolate modified zero-valent iron prepared by the method has excellent wet storage and transportation stability, and more than 95% of 10ppm CrIV can still be removed within 1h after 60 days of storage and transportation. The method provided by the invention is simple and efficient in process, low in cost and environment-friendly, and lays a technical foundation for safe and efficient low-cost macro preparation of the zero-valent iron.

To provide a depilatory composition which is easily rinsed off after use and has reduced burden on the skin.SOLUTION: A depilatory composition of the present invention contains the following components (A), (B) and (C): (A) thioglycolic acid or thioglycolic acid salts; (B) high-polymerized polyethylene glycol having an average molecular weight of 600,000 or more; and (C) water.SELECTED DRAWING: None

A depilatory composition comprising: (a) a synthetic oil; (b) a source of alkalinity; (c) a depilatory agent; (d) water; and (e) a C8-20 alkyl hydroxyalkyl cellulose; and wherein the composition has a pH in the range of 10-12.9 at 30°C ± 0.5°C measured as a 10% w / v aqueous solution or as a neat composition is provided. The synthetic oil is selected from mineral oil, silicone, white oil, PPG-Stearyl ethers, synthetic squalane or combinations thereof. The source of alkalinity is preferably potassium hydroxide. The depilatory agent is preferably potassium thioglycolate. The C8-20 alkyl hydroxyalkyl cellulose is preferably cetyl hydroxyethyl cellulose. The use of a C8-20 alkyl hydroxyalkyl cellulose to provide a storage stable depilatory composition is provided, wherein the composition is stable for at least one week at a temperature of above freezing to up to 50°C. The use of the depilatory composition to remove hair from the body is provided. A method of hair removal using the depilatory composition is provided. A preferred composition comprises (a) mineral oil; (b) potassium hydroxide; (d) water; and (e) cetyl hydroxyethyl cellulose.

The utility model provides a novel isooctyl thioglycolate esterification kettle which comprises a kettle body, the middle part of the upper part of the kettle body is fixedly connected with a driving motor, the lower end of an output shaft of the driving motor penetrates through the middle upper side in the kettle body, and the lower end of the output shaft of the driving motor is connected with a stirring rod through a coupler; supporting legs are fixedly connected to the periphery of the lower part of the kettle body respectively; an opening in the middle of the lower part of the kettle body is fixedly connected with a discharge valve, and the reaction kettle is characterized in that an immersed feeding assembly is arranged in the kettle body, and the upper side of the immersed feeding assembly penetrates through the left upper side in the kettle body. Due to the arrangement of the conveying pipe, the arc-shaped feeding pipe, the spraying holes and the material pump, the immersion feeding effect can be realized, so that a catalyst can be quickly mixed with materials, and the production efficiency of the esterification kettle can be effectively improved.

The application relates to a low-smoke halogen-free flame-retardant plastic and a preparation method thereof, and belongs to the technical field of flame-retardant high polymer materials. The components of the flame-retardant plastic are as follows: 12-17 wt% of magnesium hydroxide superfine powder, 4.5-6.2 wt% of modified flame retardant, 5-7 wt% of toughening agent, 0.9-1.2 wt% of lubricant, 0.3-0.4 wt% of antioxidant, and the rest is PBT resin; the modified flame retardant is prepared by reacting pentaerythritol and phosphorus oxychloride to form a cage-shaped phosphate ester containing a hydroxyl group, then acryloyl chloride is esterified with the hydroxyl group of the cage-shaped phosphate ester to form a monoester intermediate, and finally the thiol group of pentaerythritol tetramercaptoacetate is click-added to the double bond of the monoester intermediate; the modified flame retardant interacts with the magnesium hydroxide, a stable hollow carbon net is formed in the flame-retardant process, the smoke particles have a multilayer adsorption and filtration effect, the release of smoke is reduced, and the smoke density is greatly reduced.

The invention discloses a method for preparing a gradient tin dioxide film based on a chemical bath method, which comprises the following steps: S1, mixing urea, mercaptoacetic acid, hydrochloric acid and stannous chloride to obtain a clear chemical bath deposition solution; s2, a substrate is immersed in the chemical bath deposition solution prepared in the step S1 for soaking deposition, and then washing, annealing and blow-drying are conducted; and S3, the substrate is immersed in the chemical bath deposition solution prepared in the step S1 again for secondary chemical bath deposition, then washing, annealing and blow-drying are conducted, and the gradient tin dioxide thin film can be formed on the substrate. The prepared tin dioxide film has the advantages of being more uniform, low in resistivity, high in migration rate, high in visible light range transmissivity and the like; the preparation process can be repeated, and no suspended matter is generated in the deposition process. The tin dioxide thin film prepared by the method is applied to the perovskite solar cell, and the photoelectric conversion efficiency of the perovskite solar cell can be effectively improved.

A rotigotine-containing patch including a backing layer and an adhesive agent layer, wherein the adhesive agent layer comprises at least one selected from the group consisting of rotigotine and a pharmaceutically acceptable salt of rotigotine, and the adhesive agent layer further comprises an adhesive base agent, and at least one selected from the group consisting of thioglycolic acid and a pharmaceutically acceptable salt of thioglycolic acid.

To provide a hair-deforming cosmetic composition exhibiting low hair damage and having either a curling effect or a hair-straightening effect.SOLUTION: A hair-deforming cosmetic composition comprises thioglycolic acid, cysteamine, and an organic acid having a pKa value higher than that of thioglycolic acid, and its pH is adjusted to 8.0 or lower with a basic amino acid.SELECTED DRAWING: None

The application provides a thioglycolic acid modified carbon quantum dot, which is prepared by the following method: (1) preparing a carbon quantum dot solution by using Dicranopteris dichotoma leaves and / or Ricinus communis leaves as raw materials; (2) adding thioglycolic acid into the carbon quantum dot solution obtained in the step (1) so that the concentration of the thioglycolic acid is 0.5mmol-5mmol; after being sufficiently dissolved and mixed, the reaction is carried out at 100-140 DEG C for 1-6 hours to obtain the thioglycolic acid modified carbon quantum dot. The application finds that under suitable conditions, the inhibition effect of the thioglycolic acid modified carbon quantum dot on Ralstonia solanacearum is significantly enhanced, and the minimum inhibitory concentration and the bactericidal concentration are obviously reduced.

The invention relates to the technical field of reinforcement materials, in particular to a high-strength inorganic thin-spray reinforcement material for mining and a preparation method thereof. The inorganic thin-spray reinforcement material is prepared by blending an adhesive, an environmentally friendly gelling material, kaolin, a toughening agent and an auxiliary agent; waste foam concrete, steel slag, slag and sulphoaluminate cement are compounded to prepare the environmentally friendly gelling material; redispersible latex powder is compounded with modified basalt fiber as a toughening agent; thioglycolic acid is used to introduce a thiol group into the basalt fiber, and then a bio-based flame retardant containing a double bond at one end and an antifouling group at the other end is grafted; polyvinyl alcohol and modified acrylamide are compounded as an adhesive, and a light-initiated micelle polymerization method is adopted to prepare the modified acrylamide using acrylic acid, 2-acrylamide-2-methylpropanesulfonic acid, acrylamide, N-dodecyl acrylamide and the bio-based flame retardant as raw materials.

To provide an antimicrobial composition which has water solubility and exhibits superior antibacterial effects against Gram-positive bacteria.SOLUTION: An antimicrobial composition of the present disclosure contains a diiodomethane compound (A), a cyclodextrin derivative (B), and a compound (C), wherein the compound (C) includes at least one selected from the group consisting of pyrrolidones, organic acids, terpenes, urea and urea derivatives, alcohols, esters, chelating compounds, antioxidants, surfactants, and thioglycolic acid or salts thereof.SELECTED DRAWING: None

The invention discloses a preparation method of high-stability aviation gasoline, and relates to the field of fuel oil. When the high-stability aviation gasoline is prepared, magnetic powder reacts with mercaptoacetic acid and then reacts with polyvinylpyrrolidone to prepare porous sulfydryl modified magnetic particles; the porous sulfydryl modified magnetic particles, bis (3, 5-dicarboxyphenyl) azo and copper nitrate trihydrate are subjected to a reaction, and a magnetic desulfurizer is prepared; the method comprises the following steps: reacting a magnetic desulfurizer with base oil, and removing by magnetic adsorption to prepare primarily processed gasoline; the preparation method comprises the following steps: reacting diphenylamine, N-phenyl-alpha-naphthylamine and octylene to prepare an antioxidant; and uniformly mixing the antioxidant and the primarily processed gasoline. The high-stability aviation gasoline prepared by the preparation method disclosed by the invention has relatively low sulfur content and good stability.

The present invention provides a fast-curing epoxy resin polythiol curing agent and a preparation method, and relates to the technical field of polythiol compounds. The preparation method of the present invention comprises the following steps: aniline, modified cashew nut shell oil and formaldehyde are stirred to react to obtain a modified alcohol mixture; the modified alcohol mixture is esterified with thioglycolic acid to obtain a polythiol curing agent; wherein, the preparation of the modified cashew nut shell oil includes: cashew nut shell oil and bromomethyl phenyl sulfone are stirred and mixed at 60-80°C to obtain a mixed solution; the mixed solution is dropwise added with iodine-promoting solution at 100-120°C and refluxed for 5-7h, and then cooled to room temperature to obtain modified cashew nut shell oil. The polythiol curing agent prepared by the present invention can effectively shorten the curing time of epoxy resin, and improve the heat resistance and mechanical strength of epoxy resin products.

The invention discloses a method for recovering elemental sulfur from oxygen pressure leaching residues, which comprises the following steps: firstly, dissociating elemental sulfur from mineral substances by adopting a grinding process, and then adopting N, N '-diethyldithiocarbamate and neutral oil as collecting agents and sodium thioglycolate as an inhibitor in flotation operation; the N, N-diethyldithiocarbamate and neutral oil synergistic collecting system is adopted in flotation operation, under the organic inhibition effect of bifunctional sodium thioglycollate, the number of times of concentration can be reduced, the grade of the sulfur concentrate can be improved, high-grade sulfur concentrate is successfully obtained through roughing and concentration of the flotation column, the grade can reach 90% or above, and the recovery rate can reach 80% or above. In addition, the method does not need heating or roasting, the used medicament is acid-resistant, the filtrate can be recycled, and the method has the advantages of simple process, low energy consumption, high resource recovery rate and the like, is suitable for efficient recovery of elemental sulfur in the oxygen pressure leaching process waste residues of zinc, copper, nickel and the like, and has a wide application prospect.

The invention belongs to the technical field of immune cell culture, and particularly relates to an immune cell culture expansion medium and a preparation method thereof. The culture medium consists of a matrix and active ingredients; the matrix comprises the following components in parts by weight: 10 to 15 parts of thiolated hyaluronic acid, 8 to 12 parts of mercapto polyethylene glycol, 0.5 to 1 part of thioglycolic acid, 0.01 to 0.05 parts of hydrogen peroxide, 1 to 2 parts of perfluorodecane, 0.5 to 1 part of soybean lecithin, 1 to 2 parts of cell protectants and 40 to 50 parts of PBS buffer; the active ingredients comprise the following components in parts by weight: 0.005 to 0.01 parts of IL-2, 0.001 to 0.005 parts of IL-15, 0.05 to 0.1 parts of α-galactosylceramide, 0.03 to 0.15 parts of glutathione, 0.5 to 1 parts of amino acids, 0.25 to 0.5 parts of L-glutamine, 0.05 to 0.1 parts of pyruvic acid and 0.1 to 0.5 parts of albumin. The present invention provides continuous oxygen support and controls the release of active ingredients through a dynamic three-dimensional network constructed by sulfhydryl hyaluronic acid and mercapto polyethylene glycol.

The invention discloses a preparation method of a three-phase Ag / Ag2S / h-RGO photocatalyst, comprising the following steps: functionalized SiO2 nanospheres are added to ultrapure water and dissolved to obtain a mixed solution; graphene oxide is dispersed in ultrapure water, ultrasonicated, and then placed in the mixed solution and vigorously stirred to generate SiO2@GO; NaBH4 is then added and stirred, followed by sodium hydroxide, the mixture is stirred, and the resulting product is washed to obtain h-RGO; h-RGO is dissolved in water, thioglycolic acid is added, and vigorously stirred; AgNO3 is then added and stirred, followed by Na2S·9H2O and stirred, followed by centrifugation to obtain a product dissolved in water, and silver sulfide is in situ reduced with a sodium borohydride solution; the product is washed and dried to obtain a three-phase Ag / Ag2S / h-RGO photocatalyst. The present invention adopts a layer-by-layer (LBL) self-assembly method to synthesize nanosheets RGO with a hollow structure, and a simple in situ growth method is used to prepare a three-phase Ag / Ag2S / h-RGO photocatalyst.

The invention discloses a plasma meltallizing metal coating and a preparation method thereof, and relates to the technical field of metal coatings. When the plasma meltallizing metal coating is prepared, firstly, zinc, aluminum, titanium, cerium oxide and silicon carbide ceramic are mixed, and then the mixture and a zinc-aluminum alloy strip are prepared into a meltallizing alloy powder core wire; monoethyl phosphate and hydroxyethyl methylacrylate are subjected to a reaction, and olefin modified phosphate is prepared; the preparation method comprises the following steps: reacting isophorone diisocyanate, ethylene glycol dimercaptoacetate, polycarbonate diol and olefin modified phosphate to prepare modified polythionocarbamate; mixing the modified polythionocarbamate with a diluent, a photoinitiator and a catalyst, and defoaming to obtain a modified organic coating; the method comprises the following steps: spraying a meltallizing alloy powder core wire on the surface of a substrate by using a plasma meltallizing method, blade-coating the modified organic coating by using a blade-coating method, and carrying out ultraviolet light curing to obtain the plasma meltallizing metal coating. The prepared plasma spray metal coating has the advantages of being high in impact strength, high in bonding strength and good in corrosion resistance.

The present invention relates to the technical field of concrete admixtures and discloses a polycarboxylate water-reducing agent containing nanomaterials and a preparation method thereof. The present invention comprises adding solution A, alkenyl-modified silane chitosan, water, ammonium chloride, and ferrous sulfate to a reactor, and then adding a sodium persulfate initiator solution E, a mercaptoethanol reducing agent solution C, and a thioglycolic acid chain transfer agent solution D under stirring to initiate a polymerization reaction. Solution B is then added dropwise to the reaction mixture. After the addition is complete, the reaction is carried out, the product is cooled to room temperature, and the pH value is adjusted to neutral with an alkaline solution to obtain the polycarboxylate water-reducing agent containing nanomaterials. The chitosan in the alkenyl-modified silane chitosan can reduce the diffusion coefficient of chloride ions, improve the impermeability and density of concrete, and also improve the durability of concrete. The siloxane groups therein also improve the durability of concrete.

Rectification equipment for preparing isooctyl thioglycolate belongs to the technical field of rectification equipment and comprises a rectification tower, an upper filler plate and a lower filler plate are fixedly connected in the rectification tower, a plurality of guide rods are fixedly connected between the upper filler plate and the lower filler plate jointly, and two pre-tightening plate mechanisms are slidably connected to the guide rods jointly. A multi-direction piston mechanism is arranged between the two pre-tightening plate mechanisms, a plurality of movable ends are arranged at the positions, corresponding to the guide rods, of the multi-direction piston mechanism, the movable end of each multi-direction piston mechanism is rotationally connected with two connecting rods, and one ends of the two connecting rods are rotationally connected with the two pre-tightening plate mechanisms respectively. The pre-tightening plate mechanism, the multi-directional piston mechanism and the connecting rod are arranged to compress the filler, a large cavity is eliminated when the filler collapses due to deformation of the filler, and the guide rod, the connecting ring, the first porous plate and the stirring rod are arranged to drive the whole filler to twist, so that the adhered filler is dislocated and separated.