53 results about "Hydroquinol" patented technology

The invention relates to the technical field of silicone rubber, in particular to high-temperature-resistant flame-retardant silicone rubber, a preparation method thereof and a cable, the high-temperature-resistant flame-retardant silicone rubber comprises a gradient layer material composed of a surface layer material, a transition layer material and a core layer material, and the surface layer material comprises methyl vinyl silicone rubber, superfine furnace black, calcium stannate, polyacrylonitrile aerogel and a flame-retardant premix; the transition layer material comprises methyl vinyl silicone rubber, superfine furnace carbon black, spandex fibers, polyarylester, calcium stannate and a flame-retardant premix; the core layer material is prepared from methyl vinyl silicone rubber, superfine furnace black, aramid fiber, polyarylester, phthalonitrile resin and 2-mercaptobenzothiazole zinc salt; wherein the flame-retardant premix is prepared from hydroquinone bis (diphenyl) phosphate, phenyl ethyl aluminum phosphinate and zinc hypophosphite according to the weight ratio of (6 to 10): (2 to 4): (1 to 3); the problems that an existing material is prone to aging in an extreme environment, the flame retardant effect is poor, and the mechanical property is degraded are effectively solved.

The invention provides a block copolymer toughening-based polyether-ether-ketone material and a preparation method thereof, and relates to the technical field of high polymer materials, the method is characterized in that a block copolymer PAEK-B with a specific sequence structure is synthesized by accurately controlling a ternary block copolymerization reaction of hydroquinone, 4, 4 '-difluorobenzophenone and biphenol, and the block copolymer PAEK-B with a specific sequence structure is obtained. And then the mixture is subjected to melt blending with PEEK, so that the toughness of the PEEK is effectively improved, the mechanical property is improved, and meanwhile, the original processing temperature is kept unchanged.

The utility model provides an energy-saving device for separating and purifying materials after hydroxylation reaction of phenol and hydrogen peroxide, and relates to the technical field of chemical synthesis. Materials obtained after phenol hydrogen peroxide hydroxylation reaction are separated and purified through the extraction tower, the extraction agent recovery tower, the first phenol removal tower, the tar removal tower, the second phenol removal tower, the catechol removal tower, the light component removal tower and the hydroquinone tower, the whole technological process is simple, the yield is high, and the high-purity hydroquinone product and the high-purity catechol product can be obtained; according to the utility model, the extraction tower is adopted to replace a dehydration rectifying tower in the traditional process to remove phenol-containing wastewater, so that the phenol recovery rate is improved, and the subsequent wastewater treatment burden is reduced; and the tar removal tower is arranged behind the phenol removal tower I, so that the retention time of tar impurities in the whole process system is shortened, and the process safety is improved. According to the utility model, the high-temperature waste heat at the top of the dephenolization tower I is recovered by combining waste heat recovery with a mechanical steam recompression energy-saving technology, so that the process energy consumption of the operation of the whole device is effectively reduced.

The invention discloses a surface strengthening treatment method for an inner hole of a main connecting rod of a piston type aero-engine. The surface strengthening treatment method comprises the following steps that S100, the main connecting rod is subjected to oil removal treatment; s200, performing waxing treatment on the non-plated surface on the main connecting rod to form an insulating protection layer; s300, weak corrosion activation treatment is conducted on an inner hole of the main connecting rod; s400, a tool clamp is used for installing and hanging the main connecting rod, then a lead and tin plating solution is poured into an inner hole of the main connecting rod for out-groove electroplating treatment, and the lead and tin plating solution comprises 110 g / L to 275 g / L of lead fluoroborate, 30 g / L to 65 g / L of stannous fluoroborate, 1 g / L to 2 g / L of hydroquinone and 1.5 g / L to 2.0 g / L of oxhide gelatin; and S500, the main connecting rod is detached from the tool clamp and then subjected to wax removal and cleaning treatment, and then whether the lead-tin layer is qualified or not is checked. According to the surface strengthening treatment method for the inner hole of the main connecting rod of the piston type aero-engine, the uniformity of a plating layer can be improved, the tin content in a lead-tin layer is increased, and the wear-resisting and lubricating capacity is enhanced.

This invention discloses an anionic hydroxyl silicone oil emulsion and its preparation method, relating to the field of polysiloxane emulsion technology, and belonging to patent classification number C08G77 / 04. The preparation method is as follows: Triethanolamine dodecylbenzenesulfonate salt, tridecyl alcohol polyether, and deionized water are mixed and dissolved, heated, and polydimethylsiloxane alcohol is added under high-speed shearing for homogenization. Water is added and the reaction is maintained at a constant temperature to obtain a basic emulsion. γ-(methacryloyloxy)propyltrimethoxysilane is added dropwise to react and obtain an interface-reinforced emulsion. Acrylamide, N-hydroxymethylacrylamide, etc., are pre-emulsified and then added to the interface-reinforced emulsion with ammonium persulfate under nitrogen protection. Polymerization forms a cross-linked polymer shell. After cooling, tert-butylhydroquinone and disodium ethylenediaminetetraacetate are added to obtain an antioxidant emulsion. Phenoxyethanol and octyl glycol are added to obtain the final emulsion. This method significantly improves the thermal stability of the emulsion through the synergistic effects of composite emulsification, interface reinforcement, shell protection, and antioxidant properties, making it suitable for high-temperature environments.

The invention provides a synthetic method of a novel flame retardant with a phosphaphenanthrene-chloropropyl synergistic structure. The preparation method comprises the following steps: synthesizing bis (1-chloro-2-propyl) phosphoryl chloride from phosphorus oxychloride and epoxypropane in a molar ratio of 1: 2 in a low-temperature condition through a micro-channel reactor, reacting with DOPO-HQ (9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-yl-1, 4-benzenediol), adding a specific solvent and a catalyst, reacting to generate a crude product, filtering, washing, carrying out reduced pressure distillation, and recrystallizing to obtain the 2-(1-chloro-2-propyl) phosphoryl chloride, namely the 2-(1-chloro-2-propyl) phosphoryl chloride-DOPO-HQ (9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-yl-1, 4-benzenediol). The novel flame retardant with the phosphaphenanthrene-chloropropyl synergistic structure is obtained. A phosphaphenanthrene-chloropropyl synergistic structure is designed, so that the molecular weight and the phosphorus content are improved, and the gas-phase flame-retardant and condensed carbon-forming synergistic flame-retardant effect is improved; the thermal stability and the molecular weight are improved through a molecular bridge chain (hydroquinone), and migration is inhibited. The flame retardant has excellent flame retardant property.

The application discloses an efficient treatment method of industrial waste salt, comprising the following steps: mixing the industrial waste salt with a certain proportion of functional particles, and performing microwave treatment; wherein the functional particles are composed of first functional particles and second functional particles; the first functional particles are selected from one or more of silicon carbide, diiron trioxide, titanium dioxide and zinc oxide; and the second functional particles are selected from one or more of 2,6-di-tert-butyl-p-cresol, hydroquinone, tert-butyl catechol and copper naphthenate. The functional particles used in the application have multiple functions such as microwave absorption, reaction catalysis, polymerization inhibition and antioxidation, etc. When the functional particles are mixed with the industrial waste salt and subjected to microwave irradiation, the organic and inorganic small molecules can be catalyzed to crack and generate gaseous small molecules, and meanwhile, the organic matters in the industrial waste salt can be prevented from polymerization, so that the increase of the content of organic polymers in the waste salt is avoided.

The invention provides a method for detecting hydroquinone and resorcinol in catechol, which adopts a high performance liquid chromatography detection method and comprises the following steps: (1) preparing a test solution, a catechol reference solution and a system applicability solution by adopting a diluent; the diluent adopts 0.2% acetic acid solution-methanol in a volume ratio of 75: 25; (2) taking octadecyl silane bonded silica gel as a filling agent; a mobile phase A is a 0.2% acetic acid solution, a mobile phase B is methanol, and gradient elution is carried out; and (3) respectively injecting the catechol reference substance solution, the system applicability solution and the test solution into a liquid chromatograph, and calculating the content of each component. The method can realize quantitative and accurate detection of hydroquinone and resorcinol in catechol, is convenient to operate and high in separation degree, and has important practical significance and application value for improving the quality control level of catechol, guaranteeing the safety of raw material medicines prepared by taking catechol as a starting material and the like.

The present application relates to a kind of short process technology for manufacturing high-performance phosphor copper ball by waste copper, belong to non-ferrous metal processing technical field.Waste copper is sorted, broken, soaked, paint removal, impurity removal and then added to medium-frequency induction melting furnace, and refining agent is added for refining;Phosphor copper alloy is slowly added to the copper liquid after refining;After adding phosphor copper alloy, the copper liquid is introduced into the upper continuous casting equipment, and the copper liquid is cooled and solidified in crystallizer, and phosphor copper ball blank is directly drawn;Phosphor copper ball blank is placed in annealing furnace, and annealing is carried out;Then it is cooled by polyetheramine-bisphenol A epoxy cooling liquid;Mechanical polishing, ultrasonic cleaning obtain high-performance phosphor copper ball;Polyetheramine-bisphenol A epoxy cooling liquid is prepared by polyetheramine, bisphenol A epoxy resin, ethylene glycol butyl ether, 2,5-dimercapto hydroquinone, dibutyl tin dilaurate, deionized water, triethylamine, graphene microsheet;Phosphor copper ball has high hardness and electrical conductivity, and is a kind of high-performance phosphor copper ball.

The invention relates to a novel pesticide suspending agent which comprises 40-70 wt% of illegal cooking oil methyl ester, 30-60 wt% of cashew nut oil, 0-2 wt% of an antioxidant and 0-3 wt% of a thixotropic agent, the ratio of the illegal cooking oil methyl ester to the cashew nut oil is larger than or equal to 1: 1, the antioxidant is tert-butylhydroquinone, the thixotropic agent is one of organic bentonite, hydrogenated castor oil and fumed silica, and the thixotropic agent is one of organic bentonite, hydrogenated castor oil and fumed silica. In conclusion, the condensation point of the pesticide suspending agent can be ensured to be less than or equal to-5 DEG C through synergistic pour point depressing of a hydroxy fatty acid structure; the method has the advantages of being wide in application range, capable of recycling resources, effectively reducing cost, high in product performance stability, small in environmental pollution and suitable for large-scale popularization.

The present invention relates to the field of chemical engineering, and discloses a methyl methacrylate refining method, which comprises: mixing crude methyl methacrylate with a composite extraction agent composition, the composite extraction agent comprises a component A, a component B and a component C, the component A captures methacrylic acid through acid-base neutralization, and the component C captures methacrylic acid through acid-base neutralization; the component B captures hydroquinone monomethyl ether through Lewis acid-base coordination, after chemical capture is completed, carbon dioxide is introduced into the composite extraction agent, the polarity of a compound of crude methyl methacrylate impurities and the extraction agent is increased, a system is driven to be subjected to phase separation, a purified methyl methacrylate phase and an impurity-loaded extraction agent phase are formed, and the hydroquinone monomethyl ether is obtained. And finally carrying out physical separation. The whole process is carried out under a water-free condition, so that the production of process wastewater is avoided, the process flow is simplified, an additional dewatering and drying unit is not needed, the impurity-loaded extracting agent can be regenerated and circulated in a heating and pressure-reducing manner, and the material consumption is reduced.

The invention relates to the technical field of organic synthesis, in particular to a synthetic method of 2, 5-dibromobenzoquinone, which takes hydroquinone as an initial raw material and comprises the following two steps: step 1, adding 0.5-2% (based on the mass of hydroquinone) of a phase transfer catalyst (such as tetrabutylammonium bromide) into a glacial acetic acid solvent, reacting with bromine at 10-15 DEG C to generate 2, 5-dibromohydroquinone, and reacting for 2-4 hours at the temperature of 10-15 DEG C to obtain 2, 5-dibromohydroquinone; after the reaction, stably storing an intermediate under the protection of inert gas; 2, oxidizing the 2, 5-dibromohydroquinone into 2, 5-dibromobenzoquinone at the temperature of 45-50 DEG C by taking acetonitrile as a solvent and adopting a tert-butyl hydroperoxide (TBHP)-sodium nitrite composite oxidant (the molar ratio is (10: 1)-(15: 1)); meanwhile, glacial acetic acid and acetonitrile mother liquor generated in the reaction process are subjected to vacuum rectification recovery (the acetonitrile recovery rate is greater than or equal to 90%, and the glacial acetic acid recovery rate is greater than or equal to 88%) for recycling. The invention solves the problems of more brominated byproducts, low oxidation efficiency, solvent waste and unstable intermediate in the prior art.

The invention relates to the technical field of polyester fiber synthesis, in particular to a high-elastic polyester fiber and a preparation method and application thereof. The problem that in the prior art, the mechanical property and the elastic property of polyester fibers cannot be considered at the same time is solved. According to the fiber obtained by the invention, a sheath layer is obtained by combining isophthalic acid, polycaprolactone glycol, modified nano silicon dioxide and ultra-high molecular weight polysiloxane; the core layer is prepared from modified nano silicon dioxide, trimethylolpropane triacrylate and hydroquinone; the structural uniformity of a polymer is controlled through step-by-step esterification and polycondensation, a stable fiber structure is formed through eccentric core-sheath spinning, trimethylolpropane triacrylate is initiated to be crosslinked by combining electron beam irradiation, and heat treatment is performed to prepare the composite material. The obtained polyester fiber has high tensile strength and high elongation at break, shows excellent elastic recovery rate, and is suitable for fillers of home textile products, clothes and furniture.

This invention relates to the field of reinforcement materials technology, specifically to reactive low-temperature reinforcement materials for mining, their preparation methods, and applications. The reactive low-temperature reinforcement material for mining comprises component A and component B. Component A consists of polyester polyol, polyether polyol, silane coupling agent, and catalyst; component B consists of prepolymer and additives. The prepolymer is obtained by reacting polyether polyol b with polymethylene polyphenyl polyisocyanate. Polyether polyol b has a functionality of 3.1 and a hydroxyl value of 207 mg KOH / g, and is a polyether polyol polymerized with propylene oxide using maltitol, trimethylolpropane, hydroquinone, and triethylene glycol as initiators. The material prepared by this invention is primarily reactive in structure and flame-retardant, avoiding the impact of adding large amounts of additive flame retardants on material strength. The resulting material exhibits high compressive strength, low internal heat of reaction, and good flame-retardant properties.

This invention discloses a high-temperature and low-temperature resistant plastic film and its preparation method, relating to the field of polymer materials. In preparing the high-temperature and low-temperature resistant plastic film, bis(4-fluorophenyl)phosphine oxide is reacted sequentially with acrylonitrile, hydroquinone with 4,4'-difluorobenzophenone, 2,4-dihydroxybenzonitrile, N-(2-aminopropyl)maleimide, and furfuryl isocyanate to obtain functionalized polyetheretherketone (PEEK). Glass fibers are then reacted sequentially with N-(3-trimethoxysilylpropyl)pyrrole, 1-allyl-1H-pyrrole with 1-methylpyrrole, N-(furan-2-ylmethyl)ethylamine, and 1,3-propanesulfonic acid lactone to obtain functionalized glass fibers. The functionalized glass fibers and functionalized PEEK are mixed, coated onto a polytetrafluoroethylene (PTFE) plate, and scraped off to obtain the high-temperature and low-temperature resistant plastic film. The high-temperature and low-temperature resistant plastic film prepared by this invention possesses durability, antibacterial properties, self-healing properties, antistatic properties, and flame retardant properties.

The invention relates to a tin plating solution, in particular to a neutral tin plating solution for electroplating a terminal electrode of a micro component and a preparation method of the neutral tin plating solution. Methanesulfonic acid as a conductive salt; hydroquinone as an antioxidant; a divalent tin ion; and salts or chelates of hydroxycarboxylic acids and cyclic ester compounds thereof as complexing agents. Compared with the prior art, the method has the main advantages that the method is green and environment-friendly, the wastewater treatment process is simple, the tin plating solution has good dispersing capacity, a plating layer with the uniform thickness can be obtained on the surface of a workpiece, and the obtained plating layer is compact, uniform, small in grain size and free of pores.

The application discloses a synthesis method of a trimellitic anhydride binary phenol ester or a trimellitic anhydride binary alcohol ester in the field of organic synthesis chemical industry, and comprises the following steps: firstly, stirring binary phenol / alcohol and anhydrous solvent to be fully dissolved, then adding N-alkyl imidazole chloride as a catalyst to obtain solution A1; secondly, stirring chlorinated trimellitic anhydride and anhydrous solvent to be fully dissolved to obtain solution A2; then, slowly adding solution A1 into solution A2 under the conditions of 0-5 DEG C and N2 protection, and preparing reaction liquid A3 through a catalytic esterification reaction; and finally, centrifuging reaction liquid A3, stirring the solid into saturated sodium bicarbonate solution to be neutral, reducing pressure and filtering, and drying the filter cake to obtain high-purity trimellitic anhydride hydroquinone ester. The method has the effect of efficiently catalyzing the esterification of chlorinated trimellitic anhydride and binary phenol / alcohol, the residual solvent in the target product can be easily removed, the next step of polymerization is not affected, the production cost is low, and the method has better economy.

This invention relates to a polyester polyol, a polyurethane resin, their preparation methods, and applications, belonging to the field of polyurethane gloves. The raw materials for preparing the polyester polyol, by weight percentage, include 20-30% m-aminobenzoic acid, 30-40% adipic acid, 1-4% o-methylhydroquinone, and 31-41% 1,4-cyclohexanediol. The raw materials for preparing the polyurethane resin, by weight percentage, include 9-18% of the above-mentioned polyester polyol, 0.5-8% 3-hydroxy-2,2-dimethylpropionic acid (3-hydroxy-2,2-dimethylpropyl) ester, 5-15% isocyanate, 0.5-4% chain extender, and 60-80% solvent A. This invention, through formulation design of the polyester polyol and polyurethane resin, produces polyurethane gloves that combine the advantages of anti-slip properties, breathability, and wear resistance, overcoming the shortcomings of traditional products that struggle to achieve both.

The invention provides an aluminum electrolytic capacitor and a preparation method and application thereof. The aluminum electrolytic capacitor comprises a shell with an opening and a core, a guide pin is arranged on the core, a rubber plug is arranged at the opening of the shell, the core penetrates through the rubber plug and is accommodated in the shell, and a sleeve is arranged outside the shell; the core comprises a cathode aluminum foil, an anode aluminum foil, inner-layer electrolytic paper and outer-layer electrolytic paper; the guide pins comprise a cathode guide pin and an anode guide pin; the cathode aluminum foil is provided with a cathode guide pin, the anode aluminum foil is provided with an anode guide pin, and the inner-layer electrolytic paper and the outer-layer electrolytic paper are coated with electrolyte; the electrolyte comprises the following components in percentage by weight: 60%-70% of ethylene glycol, 20%-30% of gamma-butyrolactone, 1%-5% of dimethylformamide, 5%-10% of ammonium adipate, 3%-5% of ammonium sebacate, 1%-2% of boric acid, 0.5%-1% of ammonium dihydrogen phosphate, 0.1%-0.3% of nitrobenzoic acid, 0.05%-0.1% of ammonium molybdate, 0.2%-0.5% of polyvinylpyrrolidone and 0.05%-0.1% of hydroquinone; the aluminum electrolytic capacitor can still work normally for a long time at the ultralow temperature of 450V and the temperature of-55 DEG C, the low-temperature capacity attenuation at the temperature of-55 DEG C can be as low as-14.50%, and the low-temperature impedance ratio at the temperature of-55 DEG C can reach 1.28.

The application provides a temperature-resistant and salt-resistant biobased degradable cross-linking plugging agent and a preparation method and application thereof, and belongs to the technical field of plugging material preparation. The preparation method of the temperature-resistant and salt-resistant biobased degradable cross-linking plugging agent comprises the following steps: (1) mixing a sodium alginate aqueous solution and a FeCl2 aqueous solution, adjusting the pH of the system to 9-11 to obtain a mixed solution I; (2) adding acrylamide, 2-acrylamido-2-methylpropanesulfonic acid and polyacrylamide into water, and stirring uniformly to obtain a mixed solution II; (3) adding urotropine, o-diphenol and p-diphenol into water, and stirring uniformly to obtain a mixed solution III; and (4) mixing the mixed solution I, the mixed solution II and the mixed solution III, adding an initiator, and stirring uniformly to obtain the plugging agent. The plugging agent can significantly improve the structural stability of the plugging agent under extreme temperature and salt and strong shearing conditions, and ensure that the plugging agent can be controllably degraded through a specific mechanism after completing the plugging task.

A multi-part kit system may be used to repair damaged products used in industrial applications, comprising a part A which includes (A1) MDI prepolymer, (A2) fumed silica, and (A3) plasticizer; a part B which includes (B1) hydroquinone di-(2-hydroxyethyl)ether and (B2) plasticizer; and a part C which includes (C1) polyol, (C2) optionally, catalyst, and (C3) optionally, plasticizer.

The invention provides a multifunctional composite methanol fuel additive and a composite methanol fuel for a compression ignition engine, and belongs to the technical field of new energy fuels, the multifunctional composite methanol fuel additive comprises the following components by volume percent: 30-40% of cetane number improver 2, 5-dimethoxymethylfuran, 5-10% of antioxidant 2, 5-dimethoxymethylfuran, 1-5% of antioxidant 2, 5-dimethoxymethylfuran, 1-5% of antioxidant 2, 5-dimethoxymethylfuran, 1-5% of antioxidant 2, 5-dimethoxymethylfuran, and the balance of water. The lubricating oil is prepared from the following components in percentage by weight: 5 to 8 percent of 2, 2 '-(2-methylpropane-1, 3-diyl) dihydroquinone, 10 to 15 percent of catechin serving as a corrosion inhibitor, 3 to 5 percent of triarylimidazole serving as an anti-wear agent and 35 to 45 percent of p-methyl anisole serving as a cosolvent. The methanol fuel product disclosed by the invention has good intersoluble stability, can be stably stored for more than one year without layering under the conditions of normal temperature and normal pressure, solves the problems of corrosion and swelling of metal parts and rubber and plastic parts, prolongs the service life of a machine, improves the rate of a heat transfer process, and accelerates a combustion process.

This invention relates to a high-capacity, high-conductivity iron-manganese oxide powder, its preparation method, and its applications. The preparation method comprises the following steps: uniformly mixing MnFe-PBA powder via co-precipitation; ultrasonically dispersing the MnFe-PBA powder in a deionized water-ethanol mixed solution to form uniform MnFe-PBA particles; coating the surface of the MnFe-PBA particles with a layer of hydroquinone-formaldehyde resin via aldol condensation to obtain MnFe-PBA@RF particles; and finally calcining the MnFe-PBA particles at high temperature under an inert atmosphere to obtain Mn2FeO3@C powder. This preparation method allows for large-scale synthesis, and the obtained Mn2FeO3@C powder exhibits high specific capacity and high conductivity when used as a cathode in aqueous zinc-ion batteries.

The invention discloses a modified waste aerated concrete particle / thermal radiation inhibitor core-shell structure composite material as well as a preparation method and application thereof. The core-shell structure composite material takes modified waste aerated concrete particles as a carrier, a thermal radiation inhibitor is uniformly loaded on the surface of the carrier, and the core-shell structure composite material is obtained by mixing the modified waste aerated concrete particles, a thermal radiation inhibitor precursor and water and then performing aging and pre-carbonization treatment; wherein the modified waste aerated concrete particles are obtained by stirring and mixing cleaned and crushed waste aerated concrete particles, an alkali solution and water, and the thermal radiation inhibitor precursor is obtained by ultrasonically dispersing a hydroquinone monomethyl ether and / or zinc hydroxystannate alcoholic solution and a tetra-n-butyl titanate alcoholic solution. According to the method, the defects that waste aerated concrete particles have many holes and easily absorb water are ingeniously utilized, the heat radiation inhibitor is successfully and uniformly loaded on the surface of the waste aerated concrete particles in situ, and the problems that a conventional nano-scale heat radiation inhibitor is easily agglomerated and low in efficiency are solved.

The invention relates to the technical field of chemical catalysts, in particular to a catalyst for preparing 2-tert-butylhydroquinone and a preparation method and application thereof.The catalyst comprises a hierarchical pore H beta molecular sieve, active metal is loaded in a framework of the hierarchical pore H beta molecular sieve, and the active metal is one or more of La, Ce and Zn. The catalyst adopts the hierarchical pore H beta molecular sieve as a skeleton, so that the diffusion limitation of the traditional microporous molecular sieve can be effectively broken through, and the occurrence of side reactions is reduced while the intrinsic rate of the reaction is greatly improved. La, Ce and Zn active metals are introduced into a hierarchical pore H beta molecular sieve framework to form a high-activity catalytic center synergistic system, and the reaction process is enhanced. Compared with the traditional liquid acid catalyst and ion exchange resin, the catalyst has the characteristics of simple process, easiness in recovery, no pollution, good high-temperature stability, high catalytic activity, good selectivity and low cost, and solves the core problems of low activity, heavy pollution and high cost of the traditional catalyst.

The invention discloses an amylosucrase mutant and application thereof in synthesis of alpha-arbutin, and belongs to the technical field of genetic engineering. An amylosucrase mutant is obtained through an error-prone PCR technology, the mutant is obtained by mutation on an amylosucrase amino acid sequence derived from coprophilobacterium mediterranei, and the amino acid sequence of the amylosucrase mutant is shown as SEQ ID NO.4. The invention further discloses a preparation method of the amylosucrase mutant. Compared with a wild type strain, the catalytic activity, the temperature stability and the substrate tolerance are remarkably improved; recombinant bacteria constructed by the method can be used as a whole-cell catalyst, and alpha-arbutin is efficiently catalyzed and synthesized by taking hydroquinone as a substrate and sucrose as a glycosyl donor. Therefore, the amylosucrase mutant disclosed by the invention has a good application prospect.

An example of the present invention provides a fuel additive composition, which includes a mixture of a mixture of tert-butylhydroquinone, a catalyst, a lubricant, a lubricant, a lubricant, a lubricant, a lubricant, a lubricant, a lubricant, a lubricant, a lubricant, and a lubricant. The CAS number is 1948-33-0), and the CAS number is 1948-33-0), and the CAS number is 1948-33-0), and the CAS number is 1948-33-0, and the CAS number is 1948-33-0; the invention relates to a calcium acetylacetonate hydrate and a preparation method thereof. The calcium acetylacetonate hydrate is characterized in that the CAS number is 61789-86-4. The invention relates to a high-base-number petroleum calcium sulfonate, which is characterized in that the CAS number is 345909-31-1), and the high-base-number petroleum calcium sulfonate is prepared by the following steps of: preparing a high-base-number petroleum calcium sulfonate, a high-base-number petroleum calcium sulfonate and a high-base-number petroleum calcium sulfonate; the CAS number is 68783-96-0), and the content of sorbitan monolaurate (Sorbitan monolaurate; the CAS serial number is 1338-39-2) and 2-ethylhexyl nitrate ester (2-ethylhexyl nitrate; the CAS serial number is 1338-39-2) and 2-ethylhexyl nitrate ester (2-ethylhexyl nitrate; and the CAS serial number is 27247-96-7). The fuel additive composition according to one embodiment of the present invention can be added to various fuels such as gasoline, light oil, heavy oil and the like to improve the combustion efficiency at the time of fuel combustion while significantly reducing the generation of atmospheric pollutants such as particulate matter (PM), carbon monoxide (CO), hydrocarbon (HC), nitrogen oxide (NOx) and the like.

This invention discloses a method and continuous production apparatus for polymerizing polyarylene ether nitrile from 2,6-dichlorobenzonitrile and mixed diphenols, belonging to the field of polymer material synthesis technology. The method includes: mixing 2,6-dichlorobenzonitrile with hydroquinone / bisphenol A at a molar ratio of (0.3~0.7):(0.7~0.3), followed by azeotropic dehydration and step-temperature polycondensation in an alkaline catalyst and organic solvent to obtain a polymer viscous liquid; diluting the viscous liquid and spraying it into a 50%~70% ethanol aqueous solution through a high-pressure nozzle to achieve pressurized spray precipitation; subjecting the precipitated solid to multi-stage hot water washing and continuous vacuum drying using a continuous belt filter to obtain the finished product; recovering the solvent from the mother liquor by distillation; and recycling the wastewater after ultrafiltration membrane treatment. This invention effectively balances the rigidity and solubility of the polymer by controlling the ratio of mixed monomers, and significantly improves the heat and mass transfer efficiency of the high-viscosity system by employing pressurized spray precipitation and continuous washing and drying processes, solving the industry pain points of traditional batch precipitation such as easy agglomeration, high solvent residue, and high water consumption.

The invention provides a semi-conductive polymer composition and a preparation method and application thereof, the semi-conductive polymer composition comprises matrix resin, carbon black and an auxiliary agent 2, 5-di-tert-butylhydroquinone, so that when the semi-conductive polymer composition is prepared into a shielding material to be used in the field of cables, the corrosion degree of the shielding material to an intermediate conductor such as a copper core is weaker, and the service life of the shielding material is prolonged. Meanwhile, the catalytic aging effect on a cable insulation material is weaker, and the cable extrusion stability is good, so that the cable is not only suitable for land cables, but also suitable for continuous large-length extruded submarine cables.

The invention discloses a multifunctional fireproof flame-retardant coating for a new energy battery and a preparation method of the multifunctional fireproof flame-retardant coating, and belongs to the field of fireproof flame-retardant coatings. The flame-retardant coating comprises the following raw materials: acrylic copolymer-epoxy hybrid modified resin, 5.5 [mu] m chopped basalt fiber, 50-70 mesh perlite, barium sulfate, calcined kaolin, carbon black, titanium dioxide, an intumescent flame retardant, organic bentonite, fumed silica, a defoaming agent, a dispersing agent, a base material wetting agent, a solvent a and chlorinated paraffin. The acrylic copolymer-epoxy hybrid modified resin is prepared from the following components: epoxy resin, acrylic acid, acrylic acid-2-ethylhexyl ester, isobornyl methacrylate, acrylic acid-2-hydroxypropyl ester, dicumyl peroxide, a catalyst, hydroquinone and a solvent b. The multifunctional fireproof flame-retardant coating for the new energy battery has excellent flame-retardant and heat-insulating properties, and has the properties of medium resistance, weather resistance, salt spray resistance and the like.