34 results about "Phosphonium chloride" patented technology

The invention discloses an anti-ultraviolet spinning yarn and a preparation method thereof, and relates to the technical field of spinning yarns. When the anti-ultraviolet spinning yarn is prepared, 2, 4, 6-tri (4-hydroxyphenyl) boroxane and methylphenyl phosphonium chloride are subjected to a reaction, and a phosphorus-boron composite flame retardant is prepared; the preparation method comprises the following steps: polymerizing indole and 5-(aminomethyl) indole to coat the surface of nano titanium dioxide to prepare pre-modified nano titanium dioxide; the pre-modified nano titanium dioxide and (3-acryloyloxypropyl) tri (trimethylsiloxy) silane are subjected to a reaction, and modified nano titanium dioxide is prepared; mixing poly (pentamethylene diamine adipate), the modified nano titanium dioxide and the phosphorus-boron composite flame retardant, and performing melt spinning to obtain polyamide fibers; spinning polyamide fibers to obtain polyamide spun yarns; the polyamide spinning yarn is sequentially finished with the chloroacetic acid finishing liquid and the isoliquiritigenin finishing liquid, and the anti-ultraviolet spinning yarn is prepared. The anti-ultraviolet spinning yarn prepared by the invention has excellent anti-ultraviolet, flame-retardant and anti-static properties.

The invention provides a preparation method of diphenyl ethyoxyl phosphine and a product thereof. Taking diphenyl phosphonium chloride and absolute ethyl alcohol as raw materials, petroleum ether as a solvent and triethylamine as an acid-binding agent; the reaction process comprises the following steps: reacting diphenyl phosphine chloride with ethanol to generate diphenyl ethyoxyl phosphine and hydrogen chloride, and reacting hydrogen chloride with triethylamine to generate triethylamine hydrochloride. And after the reaction is finished, separating triethylamine hydrochloride separated by crystallization from the liquid organic phase through centrifugation, taking the obtained triethylamine hydrochloride as a co-product, carrying out desolvation treatment on the obtained liquid organic phase to obtain a diphenylethoxyphosphine crude product, and rectifying to obtain the high-quality diphenylethoxyphosphine. The preparation process provided by the invention is mild in reaction condition, simple and convenient to operate and low in requirements on equipment and energy consumption; the raw materials are wide in source and low in cost, and the solvent and the acid-binding agent can be recycled, so that the method has the advantage of environmental protection. The prepared diphenyl ethyoxyl phosphine is high in purity and good in yield, and has a wide industrial application prospect.

The invention discloses a preparation method of a modified zinc negative electrode, the modified zinc negative electrode and an aqueous zinc ion battery, and belongs to the technical field of zinc ion batteries. The preparation method of the modified zinc negative electrode comprises the following steps: diluting a tetrakis (hydroxymethyl) phosphonium chloride (THPC) solution with the mass ratio of 80% to a certain concentration, and uniformly stirring to form a treatment solution; after cutting the zinc negative electrode, carrying out surface degreasing treatment on the zinc negative electrode; immersing the treated zinc negative electrode in a tetrakis hydroxymethyl phosphonium chloride treatment solution at room temperature for reaction; and after the reaction is finished, washing the residual solution on the surface of the zinc negative electrode after the reaction by using deionized water and absolute ethyl alcohol, and drying in a vacuum drying oven to obtain the modified zinc negative electrode. With the adoption of the preparation method of the modified zinc negative electrode, the modified zinc negative electrode and the aqueous zinc ion battery, the problem of poor cycling stability of the modified zinc negative electrode in an aqueous electrolyte can be solved.

The invention relates to the technical field of polylactic acid fibers, and discloses a preparation process of an anti-static polylactic acid superfine fiber fabric, star-shaped polylactic acid grafted carbon nanotubes are prepared from tetra (hydroxymethyl) phosphorus chloride, 2-amino-4, 6-dimethoxy-1, 3, 5-triazine and the like as raw materials, and the star-shaped polylactic acid grafted carbon nanotubes and polylactic acid slices are subjected to melt spinning to obtain the polylactic acid superfine fiber fabric; the star-shaped polylactic acid grafted carbon nanotubes have a structure similar to that of a polylactic acid matrix, so that the carbon nanotubes are uniformly dispersed in a polymer matrix and form relatively strong interface bonding, migration and precipitation are avoided, and the star-shaped polylactic acid grafted carbon nanotubes have anti-static durability; the structure of the superfine fiber fabric contains nitrogen and phosphorus synergistic flame-retardant elements, so that the exchange between a fiber matrix and oxygen and heat in the air can be blocked, and the flame-retardant property of the superfine fiber fabric is improved; the density of the fiber fabric can be increased by the formed cross-linked network structure, so that the mechanical property of the superfine fiber fabric is remarkably improved.

The invention discloses a lignin-based liquid mulching film as well as a preparation method and application thereof, the liquid mulching film is prepared by taking lignosulfonate as a main raw material, compounding the lignosulfonate with chitosan and polyvinyl alcohol to form a basic solution, then carrying out crosslinking modification by epoxy chloropropane and complexing treatment by tetrakis hydroxymethyl phosphonium chloride, and finally adding nano kaolin and uniformly stirring. When in use, the fertilizer is diluted with water and then sprayed on the surface of soil to form a uniform covering film. According to the invention, a phenylpropane structure of lignosulfonate is fully utilized as a rigid framework of a polymer, and the obtained mulching film has good film-forming property, hydrophobicity and heat preservation and moisture conservation performance through a tackifying effect of chitosan, a toughening effect of polyvinyl alcohol and synergistic modification of the cross-linking agent and the complexing agent. The addition of the nano kaolin further enhances the infrared barrier ability of the mulching film and reduces heat loss at night.

The invention discloses a preparation method and application of a catalyst for preparing formic acid from CO2 under high current density, and belongs to the field of CO2 electroreduction. According to the catalyst, InO (OH) is used as a substrate, ionic liquid is introduced to modify the substrate, and the ionic liquid is prepared from corresponding chlorinated quaternary phosphonium salt and trifluoromethanesulfonamide through a reaction. Wherein quaternary phosphonium cations can form a local electric field at a cathode in CO2 electroreduction, a reaction intermediate of formic acid is stably generated, and the product selectivity is greatly improved. Anions have very strong hydrophobicity, remarkably inhibit hydrogen evolution side reaction, have the effect of enriching CO2, and can form a high-concentration CO2 local microenvironment. Under the synergistic effect of anions and cations, the problems that an indium-based catalyst is weak in CO2 adsorption capacity, low in catalytic activity and the like are effectively relieved, and the catalyst still has good formic acid Faraday efficiency under the ampere-level current density. The preparation method is simple and easy to popularize.

The utility model discloses a continuous evaporation system for tetrakis (hydroxymethyl) phosphonium chloride. The continuous evaporation system comprises a first-effect evaporation device, a second-effect evaporation device and a third-effect evaporation device which are arranged in sequence, the first-effect evaporation device comprises a first-effect graphite tube preheater, a first-effect graphite tube evaporator and a first-effect graphite flash evaporator; the second-effect evaporation device comprises a second-effect graphite tube nest evaporator and a second-effect graphite flash evaporator; and the triple-effect evaporation device comprises a triple-effect graphite tube nest evaporator and a triple-effect graphite flash evaporator. According to the utility model, the steam can be utilized in a multi-stage manner, the steam generated after the material liquid of the first-effect evaporator is evaporated is fed into the second-effect evaporator to serve as a heat source, and the steam generated by the second-effect evaporator is used as a heat source of the third-effect evaporator, so that the steam energy consumption can be effectively reduced, the evaporation time is shortened, and the energy consumption is reduced. And the whole process is in a closed state, and condensate water is not discharged and can be used as water for batching in other procedures, so that the production purposes of energy conservation and emission reduction are achieved.

The invention relates to multifunctional finishing liquid as well as a preparation method and application thereof in silk products, and belongs to the technical field of textiles. The preparation method comprises the following steps: firstly, carrying out cross-linking reaction on tetrakis (hydroxymethyl) phosphonium chloride, polyhexamethylene biguanide and a film-forming agent in water to obtain colorless, transparent, antibacterial, mildew-proof and flame-retardant multifunctional finishing liquid; then the antibacterial, mildew-proof and flame-retardant multifunctional silk product is prepared in a spraying and airing mode, and safety protection is conducted on the silk product. Tetrakis (hydroxymethyl) phosphonium chloride and polyhexamethylene biguanide are grafted on chitosan through covalent bonds, tetrakis (hydroxymethyl) phosphonium chloride and polyhexamethylene biguanide are fixed on the silk product by means of excellent film-forming property of chitosan, and redundant hydroxymethyl of tetrakis (hydroxymethyl) phosphonium chloride can be subjected to cross-linking reaction with amino groups of the silk product; therefore, the network-shaped multifunctional finishing agent can be fixed on the silk product through a film-forming effect and a cross-linking effect.

This invention relates to a polyethylene composite packaging material containing modified graphene and its preparation method, belonging to the field of polymer materials technology. The invention involves reacting hydroxyl polyethylene with acyl chloride-modified graphene to obtain polyethylene-grafted graphene, followed by quaternization of the tertiary amine groups to obtain graphene modified with both polyethylene and quaternary ammonium salt groups. Furthermore, it utilizes maleic anhydride-grafted polyethylene and epoxy-modified hollow glass microspheres to obtain polyethylene-grafted hollow glass microspheres, followed by reaction of the hydroxyl groups with quaternary phosphonium chloride to obtain hollow glass microspheres modified with both polyethylene and quaternary phosphonium salt groups. The polyethylene segments can improve the affinity between solid particles and the polyethylene substrate, while the quaternary ammonium salt groups and quaternary phosphonium salt groups can further enhance the surface activity of the solid particles, synergistically enhancing the antistatic and antibacterial properties of graphene.

The invention relates to an aluminosilicate mineral anion and cation combined collecting agent in a neutral environment. The aluminosilicate mineral anion and cation combined collecting agent is characterized by comprising 2-5 parts of a vegetable oil amide fatty acid collecting agent and 4-10 parts of tetradecyl tributyl phosphonium chloride. The preparation method is simple, and the raw materials are low in price and easy to obtain; the plant oil amide fatty acid collecting agent has carboxyl and amide, and the problems of low temperature resistance, mud resistance, adaptability and other pain points of traditional fatty acid collecting agents such as oleic acid are solved. The aluminosilicate mineral anion and cation combined collecting agent can be used in a neutral environment, the flotation performance of the aluminosilicate mineral anion and cation combined collecting agent is better than that of traditional fatty acid collecting agents such as oleic acid and lauryl amine, and the flotation recovery rate and grade can be effectively improved.

The application discloses a modified zinc negative electrode preparation method, a modified zinc negative electrode and an aqueous zinc ion battery, and belongs to the technical field of zinc ion batteries. The modified zinc negative electrode preparation method comprises the following steps: diluting a tetrahydroxymethyl phosphonium chloride (THPC) solution with a mass ratio of 80% to a certain concentration, uniformly stirring, and forming a treatment solution; cutting a zinc negative electrode, and performing surface oil stain treatment on the zinc negative electrode; immersing the treated zinc negative electrode in the THPC treatment solution at room temperature, and allowing the zinc negative electrode to react; after the reaction is completed, washing the surface of the reacted zinc negative electrode with deionized water and anhydrous ethanol, and drying the zinc negative electrode in a vacuum drying box to obtain a modified zinc negative electrode. The modified zinc negative electrode preparation method, the modified zinc negative electrode and the aqueous zinc ion battery can solve the problem of poor cycle stability of the modified zinc negative electrode in an aqueous electrolyte.

The present application relates to a kind of modified silk fibroin and its preparation method and application in silk product, belong to textile technical field.The present application is modified to silk fibroin using tetramethylammonium phosphonium chloride, polyhexamethylene biguanide, glutaraldehyde, diethyl phosphite, prepare multifunctional modified silk fibroin;Then multifunctional silk product of antibacterial, mildewproof, flame-retardant is prepared by spraying, air-drying mode, and silk product is carried out safety protection.The modified silk fibroin of the present application has good compatibility with silk product such as silk cultural relics, can be adsorbed on silk product, and the hydroxymethyl of tetramethylammonium phosphonium chloride not involved in the reaction on the surface of modified silk fibroin, the aldehyde group of glutaraldehyde can occur crosslinking reaction with the active amino group of silk product, so as to graft modified silk fibroin on silk product, thus can be modified to silk product by spraying, natural air-drying mode.

The invention provides diamond wire cutting cooling liquid for silicon carbide wafer cutting, and particularly relates to the field of silicon carbide cutting liquid. The cutting coolant comprises the following components in parts by weight: 5-20 parts of polyol ester, 10-30 parts of fatty alcohol polyoxyethylene polyoxypropylene ether, 0.5-15 parts of poly (4-vinyl benzyl-tri (2-cyanoethyl) phosphonium chloride, 1-5 parts of a catalyst, 1-5 parts of a defoaming agent and 1-5 parts of an antioxidant. The cleaning agent is prepared from the following components in parts by weight: 0.01 to 1 part of aromatic acid, 0.05 to 2 parts of macromolecular viscosity modifier, 0.05 to 5 parts of zinc dialkyl dithiophosphate, 2 to 20 parts of alkynediol gemini surfactant, 0.1 to 2 parts of pH regulator, 0 to 20 parts of organic solvent, 0.02 to 2 parts of organic silicon defoaming agent and 10 to 50 parts of deionized water. The diamond wire cooling liquid for silicon carbide wafer cutting provided by the invention has the characteristics of large boundary lubricating film thickness and high boundary lubricating film strength. The cutting mode of the silicon carbide wafer from the diamond powder abrasive mortar and the steel wire is replaced by the diamond wire cutting mode, and the purposes of improving the cutting efficiency, reducing TTV, improving surface line marks and reducing the smudginess rate are achieved.

The application discloses application of an ionic liquid double-water phase system in heavy metal separation in high-salt wastewater, and relates to application of the ionic liquid double-water phase system in heavy metal separation in high-salt wastewater, wherein the ionic liquid double-water phase system comprises an ionic liquid, an inorganic salt and water, the ionic liquid is a quaternary phosphonium chloride ionic liquid or a quaternary ammonium chloride ionic liquid, the inorganic salt and water are from the high-salt wastewater, and the heavy metal is a heavy metal ion capable of forming a stable complex with chloride ions in the high-salt wastewater.The application of the ionic liquid double-water phase system in heavy metal separation in high-salt wastewater has the advantages of no volatilization, safety and stability and low viscosity, and the inorganic salt in the high-salt wastewater is used as a phase forming substance without additional addition of the inorganic salt.

The application discloses a PVA flame-retardant composite film with a cross-linking structure and a preparation method thereof, and belongs to the technical field of composite films. The preparation method comprises the following steps: S1, preparing a polyethyleneimine aqueous solution and a tetra(hydroxymethyl)phosphonium chloride aqueous solution respectively; S2, heating and dissolving PVA particles with distilled water as a solvent to obtain a PVA aqueous solution glue; uniformly mixing the polyethyleneimine aqueous solution and / or the tetra(hydroxymethyl)phosphonium chloride aqueous solution with the PVA aqueous solution glue, heating and standing to obtain a mixed glue; and adding the mixed glue into a mold, performing constant-temperature and constant-humidity drying treatment to obtain the PVA flame-retardant composite film with the cross-linking structure. The composite film has the characteristics of good flame retardancy and high strength.

The invention discloses a nanoparticle electrocatalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing NiCl2. 6H2O, tetrabutyl phosphonium chloride and ethylene glycol, and heating to obtain a deep eutectic solvent DESs; and placing the DESs in a microwave reactor for microwave reaction to obtain the nanoparticle electrocatalyst. The method has the remarkable advantages of being simple in process, rapid in reaction (only in minute level), low in cost, easy to industrially amplify and the like. The prepared Ni3P-Ni12P5 heterostructure nanoparticles have the characteristics of uniform morphology, good crystallinity and the like, and show excellent catalytic activity and stability in an electro-catalytic hydrogen evolution reaction. Particularly, the microwave-assisted one-step synthesis method avoids the complexity of the traditional multi-step process, and provides a new idea for large-scale preparation of the high-performance electrocatalyst.

The invention relates to a tetrahydrogeranyl quaternary phosphonium salt compound as well as a preparation method and application thereof in preventing and treating plant diseases, and belongs to the technical field of agricultural chemistry. According to the preparation method, tetrahydrogeranyl halide and a corresponding phosphine reagent are subjected to a reflux reaction in an organic solvent, the yield is high, and the process is simple. The compound, especially the tetrahydrogeranyl triphenyl phosphonium salt, has excellent inhibitory activity on a variety of plant pathogenic fungi such as rhizoctonia solani, decumbent pine mushroom and phytophthora parasitica var nicotianae, IC50 of tetrahydrogeranyl triphenyl phosphonium chloride on decumbent pine mushroom is as low as 0.95 mg / L, and the effect of tetrahydrogeranyl triphenyl phosphonium chloride is remarkably superior to that of a control pesticide chlorothalonil. The invention provides a novel candidate compound for developing a novel agricultural bactericide which is efficient and low in toxicity and is derived from natural products.

The invention relates to a durable flame-retardant cotton fabric and a preparation method thereof, and belongs to the technical field of functional fabrics. The preparation method comprises the following steps: S1, carrying out rolling and baking treatment on a cotton fabric by adopting a mixed finishing liquid of aminoethyl phosphoric acid and dicyandiamide to obtain a primarily finished cotton fabric; s2, carrying out rolling and baking treatment on the primarily finished cotton fabric by adopting a tetrakis (hydroxymethyl) phosphonium chloride urea precondensate finishing liquid to obtain a secondarily finished cotton fabric; s3, carrying out rolling and baking treatment on the secondarily finished cotton fabric by adopting p-phenylenediamine finishing liquid to obtain the durable flame-retardant cotton fabric. According to the durable flame-retardant cotton fabric, tetrakis (hydroxymethyl) phosphonium chloride can serve as an acid source, nitrogen-containing groups in p-phenylenediamine and urea structures serve as gas sources, aromatic groups in the p-phenylenediamine structures serve as carbon sources, an intumescent flame-retardant system is organically constructed, the flame-retardant efficiency is high, and the durable flame-retardant cotton fabric has excellent flame retardance and washing resistance.

The invention provides a medical bacterial cellulose dressing with high water retention capacity and a preparation method and application thereof, and belongs to the technical field of medical supplies. The medical bacterial cellulose dressing with high water retention capacity is prepared by reacting a bacterial cellulose membrane with a sodium hyaluronate solution in the presence of tetrakis hydroxymethyl phosphonium chloride, and the water retention time of the dressing is not less than 2000min. The medical bacterial cellulose dressing with high water retention capacity prepared by the invention shows great advantages in actual medical application. For patients with burns and scalds, traditional dressings are often difficult to keep moist of wounds for a long time, and if the dressings are uncovered after being dried to cause secondary wound injury, the dressings can provide a lasting and stable moist environment for the wounds and accelerate repair and regeneration of damaged skin cells by virtue of the excellent water retention capacity of the dressings.

The present invention belongs to the technical field of sewage treatment, and particularly relates to a demulsifier for eliminating the emulsified layer at the oil-water interface in the treatment of oilfield produced fluid and a preparation method thereof. The preparation method is as follows: acrylamide, 1-allyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide, allyl tributyl phosphonium chloride and deionized water are added into a first reactor and heated to dissolve; allyl(diisopropylamino)dimethylsilane, butyl acrylate, deionized water, octylphenol polyoxyethylene ether-10, sodium dodecyl sulfate and potassium dihydrogen phosphate are added into a second reactor and stirred to form an emulsion; an initiator and sodium bisulfite are added into the second reactor, the temperature is raised, and the reaction is carried out under insulation. The mixed solution in the first reactor is poured in, the reaction is continued, the temperature is raised, and the insulation is continued to obtain a viscous liquid; the viscous liquid is dried and granulated to obtain the demulsifier. The demulsifier of the present invention has the characteristics of simple synthesis process and high demulsification rate.

The invention discloses a high-elastic moisture-conducting fiber and a preparation method thereof, and relates to the field of fibers. When the high-elastic moisture-conducting fiber is prepared, cotton roving is oxidized through sodium periodate and then reacts with bis (2-furan) phosphonium chloride and glutathione in sequence, and modified cotton roving is obtained; the preparation method comprises the following steps: uniformly mixing polytetrahydrofuran, maleimide-tri (ethylene glycol)-propionic acid, 4, 4 '-diphenylmethane diisocyanate, di (ethoxyl) methyl dodecyl ammonium chloride and ammonium bicarbonate, and spinning to obtain spandex core yarns; and spinning the modified cotton roving and the spandex core silk to obtain the high-elastic moisture-conducting fiber. The high-elastic moisture-conducting fiber prepared by the invention has excellent flame retardance, ageing resistance, antibacterial property, elasticity and moisture conductivity.

The application discloses an ethyne hydrochlorination reaction catalyst, which is prepared by stirring nitrogen-containing precursors, phosphorus-containing precursors, copper sources and organic solvents uniformly, drying, high-temperature calcination and acid washing; the nitrogen-containing precursors are one or more of 1-butyl-3-methyl imidazole bromide, 1-butyl-3-methyl imidazole chloride, 2-methyl imidazole and pyridine; the phosphorus-containing precursors are one or more of phosphoric acid, triphenyl phosphine, tetraphenyl phosphonium bromide and tetraphenyl phosphonium chloride; and the copper source is copper chloride or copper nitrate. The catalyst obtained by the application has the advantages of high stability and high activity.

The invention relates to a durable flame-retardant polyester / viscose blended fabric and a preparation method thereof, and belongs to the technical field of functional fabrics. The preparation method comprises the following steps: S1, carrying out primary modification treatment on a polyester / viscose blended fabric by adopting a triglycidyl isocyanurate solution to obtain a primary modified polyester / viscose blended fabric; s2, carrying out secondary modification treatment on the primary modified polyester / viscose blended fabric by adopting a tetrakis hydroxymethyl phosphorus chloride urea precondensate solution to obtain a secondary modified polyester / viscose blended fabric; s3, carrying out third-time modification treatment on the secondary modified polyester / viscose blended fabric by adopting an aniline solution to obtain the durable flame-retardant polyester / viscose blended fabric. Tetrakis (hydroxymethyl) phosphonium chloride in the durable flame-retardant polyester / viscose blended fabric can serve as an acid source, nitrogen-containing groups of urea and triglycidyl isocyanurate serve as gas sources, a polycyclic structure of triglycidyl isocyanurate and aniline serves as a carbon source, an intumescent flame-retardant system is organically constructed, and the flame-retardant efficiency is high.

The invention discloses a preparation method of a near-infrared two-region ratiometric fluorescent probe for quantitatively detecting ROS (reactive oxygen species). The preparation method comprises the following steps: 1) preparing NaYF4: 20% Yb and 2% Er DCNPs by coprecipitation of lanthanum acetate hydrate, ODE and OA; 2) based on NaYF4: 20% Yb, 2% Er DCNPs, preparing NaYF4: 20% Yb, 2% Er-coated NaYF4: 30% Nd core-shell DCNP through a seed-mediated core-shell growth method, and preparing NaYF4: 20% Yb, 2% Er-coated NaYF4: 30% Nd core-shell DCNP through a seed-mediated core-shell growth method; 3) azobenzene-4, 4 '-dicarboxylic acid, EDC, NHS and DSPE-PEG-2000 are dissolved in DMF for a reaction, after resuspension, a product is dissolved in DMF, EDC, NHS and cysteamine are added for a reaction, and after the product is resuspended again, modified DSPE-PEG is obtained; 4) dispersing the core-shell DCNP and a dye in dichloromethane, adding the modified DSPE-PEG for reaction, and performing rotary evaporation, water adding centrifugation and cleaning on a product to obtain a DCNP dye; (5) adding chloroauric acid into a mixed solution of tetrakis (hydroxymethyl) phosphonium chloride and NaOH under high-speed stirring, and stirring to obtain gold seeds; and reacting the gold seed with the DCNP dye. The ratiometric fluorescent probe prepared by the invention is provided with a reference, so that errors can be effectively eliminated, and accurate quantitative imaging of target molecules is realized.

The invention discloses a method for continuously preparing THPC, and particularly relates to a system and a method for continuously preparing tetrakis hydroxymethyl phosphonium chloride based on sodium hypophosphite byproduct tail gas and a urea initial condensation body of tetrakis hydroxymethyl phosphonium chloride. Pretreating the sodium hypophosphite byproduct tail gas to remove impurities; continuously introducing the purified tail gas, formaldehyde and hydrochloric acid into a system formed by connecting 4-6 reaction kettles in series according to a specific molar ratio, and carrying out multi-stage countercurrent reaction; the reaction endpoint is accurately regulated and controlled by monitoring the density and the formaldehyde concentration of the last-stage reaction liquid on line and feeding back and controlling feeding; the reaction completion liquid enters an evaporator with a silicon carbide heat exchange crack tube as a core for continuous concentration; and finally, carrying out online pH regulation and filtration to obtain a THPC product, and further carrying out continuous condensation with urea. According to the invention, the safe and high-valued utilization of the industrial tail gas with complex components is realized, the industrial problems of equipment corrosion, product quality fluctuation and the like are overcome through whole-process continuity and intelligent control, and the production efficiency and the product stability are remarkably improved.

The invention discloses a method for improving bipolar membrane electrodialysis efficiency, and belongs to the technical field of membranes. According to the method, an anion exchange membrane capable of blocking hydrogen ion leakage is used in the bipolar membrane electrodialysis process to prevent hydrogen ion migration, so that the acid-base concentration and purity are improved, and the current efficiency of a system is improved; the preparation method of the anion exchange membrane comprises the following steps: weighing the substrate polymer and the carrier according to a certain mass ratio, pouring the substrate polymer and the carrier into an organic solvent for dissolving, stirring, carrying out ultrasonic degassing for a period of time to obtain a uniform and transparent membrane casting solution, pouring the membrane casting solution into a leveled membrane tool, and volatilizing at normal temperature for a period of time to obtain the uniform anion exchange membrane; the substrate polymer is cellulose triacetate; the carrier is trihexyltetradecyl phosphonium chloride. According to the invention, the problem that the current efficiency is reduced due to leakage of hydrogen ions in the acid chamber, reduction of the acid concentration and neutralization of part of the alkali concentration in the alkali chamber due to the fact that the anion exchange membrane cannot completely prevent leakage of hydrogen ions in the bipolar membrane electrodialysis process can be solved.

The invention belongs to the technical field of oil exploitation, and particularly relates to an anti-swelling clay stabilizer as well as a preparation method and application thereof. The preparation method comprises the following steps: adding 2-allyloxymethyl-2-methylolpropane-1, 3-diol into a reactor, adding sulfamic acid, and carrying out heat preservation reaction; distilled water, N-acryloyl (trihydroxymethyl) aminomethane, octadecyl dimethyl allyl ammonium chloride, allyl tributyl phosphonium chloride and buffer salt are sequentially added into the reactor, and the pH value is adjusted; dropwise adding an initiator, after dropwise adding is completed, carrying out heat preservation reaction, adding ethanol, precipitating, centrifuging, and drying overnight to obtain the clay stabilizer. The clay stabilizer disclosed by the invention has the advantages of high anti-swelling rate and washing resistance.

The present application relates to the technical field of oilfield chemistry, and is a kind of amphiprotic polymer and its preparation method and application, the former is obtained by copolymerization of anionic monomer, first cationic monomer, second cationic monomer and crosslinking monomer;The anionic monomer is one or more of sodium vinyl sulfonate, sodium allyl sulfonate, sodium methacrylate sulfonate, sodium p-styrene sulfonate, (4-vinyl) phenyl methane sulfonate sodium, 3-allyloxy-2-hydroxy-1-propane sulfonate sodium or 2-acrylamide-2-methyl propane sulfonate sodium;The first cationic monomer is N-allyl-N, N-dimethyl cyclohexyl ammonium chloride;The second cationic monomer is allyl tributyl phosphonium chloride;The crosslinking monomer is N, N'-methylene bisacrylamide. The amphiprotic polymer has high charge density, outstanding performance as clay stabilizer, high anti-swelling rate, excellent water washing resistance, does not harm the sand carrying capacity of fracturing fluid, and is suitable for fracturing operation in high temperature and even super high temperature reservoir.

The invention discloses di-tert-butyl phosphonium chloride d18 and a preparation method thereof, a phosphine ligand and a catalyst, the method comprises the following steps: S1, dispersing tert-butyl chloro-d9 and magnesium chips in an organic solvent, and initiating a Grignard reaction by an initiator to generate tert-butyl magnesium chloride-d9; the molar ratio of the tertiary butyl chlorine-d9 to the magnesium chips to the initiator is 1: (1.0-1.2): (0.01-0.02); and S2, dissolving phosphorus trichloride in an organic solvent, adding the tert-butyl magnesium chloride-d9 obtained in the S1, reacting to generate di-tert-butyl phosphorus chloride-d18, and separating and purifying to obtain the product. The raw materials are easy to obtain, the reaction conditions are mild and controllable, and industrial enlarged production is facilitated.

The application relates to the technical field of polylactic acid fibers, and discloses a preparation process of an anti-static polylactic acid superfine fiber fabric, which is prepared from tetra (hydroxymethyl) phosphonium chloride, 2-amino-4, 6-dimethoxy-1, 3, 5-triazine and the like as raw materials, star-shaped polylactic acid grafted carbon nanotubes are prepared, and are melt spun with polylactic acid chips to obtain the polylactic acid superfine fiber fabric; the star-shaped polylactic acid grafted carbon nanotubes have a structure similar to that of the polylactic acid matrix, the carbon nanotubes are uniformly dispersed in the polymer matrix and form a strong interface combination, migration and precipitation are avoided, and the anti-static durability is good; nitrogen and phosphorus synergistic flame-retardant elements are contained in the structure, the exchange of the fiber matrix with oxygen and heat in the air can be blocked, the flame-retardant performance of the superfine fiber fabric is improved; the formed crosslinked network structure can increase the compactness of the fiber fabric, and the mechanical performance of the superfine fiber fabric is significantly improved.