63 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 present application discloses a method for preparing biodiesel using lipase catalysis, which relates to the field of biodiesel. The biodiesel enzymatic reaction process comprises: raw oil pretreatment, enzymatic transesterification reaction, acid reduction treatment, and fatty acid salt modification. The acid reduction treatment step comprises: passing the obtained crude biodiesel through an oil-water separator to further remove water, passing the dehydrated crude biodiesel into a reactor containing a low concentration of potassium hydroxide methanol solution for multiple acid reduction reactions, and obtaining acid-reduced biodiesel after the reaction. Methylacrylic anhydride and tertiary butylhydroquinone are subjected to an esterification reaction, and the synthesized product is subjected to a halogenation reaction with copper chloride. The resulting product is used to modify the fatty acid salts in the acid-reduced biodiesel to obtain the biodiesel of the present application. The present application has the effects of reducing the acidity of biodiesel, avoiding saponification reaction, improving anti-emulsification ability, and lowering the freezing point.

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 discloses a virus-free culture method of lily bulbs, and relates to the technical field of lily bulb breeding, stem tips are adopted to culture lily bulbs, the stem tips have no vascular bundles, so that the lily bulbs contain few viruses, and an antioxidant is added to inhibit browning during stem tip culture; the preparation method comprises the following steps: preparing an antioxidant microcapsule by taking polyvinylpyrrolidone as a capsule wall and vitamin C, tert-butylhydroquinone and butylated hydroxyanisole as a capsule core, loading the antioxidant microcapsule on the surface of activated carbon, and adding a culture medium, so that the browning phenomenon is effectively inhibited; according to the method, detoxification propagation is carried out by utilizing a heat treatment method, the detoxification rate is effectively improved, detoxification is carried out by utilizing chemical treatment, and virus infection can be effectively inhibited by adding virazole, actinomycin D and 5-dihydrouracil into a culture medium, so that detoxified lily bulbs are cultured.

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.

The present invention belongs to the field of catalysts, and specifically relates to a recyclable peroxidase mimetic enzyme, its preparation method, and application. The peroxidase mimetic enzyme comprises PVA aerogel and CuO nanoparticles, wherein the CuO nanoparticles are loaded on the surface of the PVA aerogel. The preparation method comprises sequentially immersing the PVA aerogel in a copper salt solution and an alkaline solution, washing, and drying the aerogel to obtain the peroxidase mimetic enzyme. The peroxidase mimetic enzyme prepared by the present invention not only has excellent catalytic performance, but is also easy to recycle and separate after the catalytic reaction, can be reused, and still maintains good catalytic performance after repeated recycling ten times. Moreover, when the peroxidase mimetic enzyme is removed during the catalytic reaction, the reaction rate is significantly reduced, achieving the effect that the reaction can be controlled at any time. In addition, the peroxidase mimetic enzyme can achieve highly sensitive and instant detection of hydroquinone / catechol, has a simple operation process, does not require specialized instruments and professionals, greatly improves detection speed, and reduces labor costs.

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 relates to the field of microelectronic packaging, and specifically discloses an anisotropic conductive film containing microencapsulated radical accelerators, which is prepared by curing an adhesive, and the adhesive is prepared from raw materials containing the following components by weight: 35-50 parts of film-forming resin, 3-8 parts of toughening elastomer, 13-35 parts of acrylate prepolymer, 3-5 parts of acrylate active diluent, 1-3 parts of difunctional acrylate, 2-4 parts of phosphoric acid acrylate, 1-3 parts of silane coupling agent, 2-5 parts of organic peroxide curing agent, 0.5-3 parts of microencapsulated curing accelerator, 0.0001-0.0004 parts of hydroquinone, 3-7 parts of fumed nano-silicon dioxide, 4-6 parts of conductive microspheres, and 200-300 parts of ethyl acetate; the adhesive has the advantages of rapid curing under low-temperature conditions and good stability under normal-temperature conditions.

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.