81results about How to "Meet the requirements of green chemical industry" patented technology

The invention discloses a preparation method of a biomass lamella carbon material and application of the biomass lamella carbon material in a lithium ion battery. The biomass lamella carbon material is prepared by processing betel nut shells through an alkaline solution and an acid solution, carbonizing the betel nut shells and ball milling the betel nut shells and can be used as a battery electrode material. The renewable betel nut shells are selected as a carbon source, the raw material is cheap and wide in source, the preparation process is simple, the cycling stability of the prepared battery is good, and the capacity is large.

The invention provides a preparation method of hydroxy methionine salt and a compound, comprising the following steps: a. feeding metal hydroxide or basic metal oxide or amphoteric metal oxide and 2-hydroxy-4-methylthiobutyricacid into a closed and corrosion resistant reaction kettle to react for 0.5-12h according to a stoichiometric ratio, taking the low-boiling polar organic solvent or the mixed solvent thereof with water as the reaction medium, stirring, separating the target product, washing and drying to obtain the products; and b. recycling the reaction medium. The preparation method of the invention has short route, no consumption of acid or alkali reagent, low cost, easily-controllable product quality, environmental friendliness and the like, thus being applicable to large-scale industrial production.

The invention relates to a method for synthesizing olefin by electro-catalyzing semi-hydrogenated gas-phase alkyne. The method comprises the following steps of: spraying a catalyst onto a gas diffusion layer substrate (comprising conductive carbon paper, metal and the like) by using a gas diffusion electrode, isolating a cathode from an anode by using an ion exchange membrane, and adopting a three-electrode or two-electrode system constant-voltage method to carry out electrochemical performance test, wherein the reaction gas is high-purity alkyne. According to the invention, the experimental results show that the method can be used for efficiently and selectively reducing the gas-phase alkyne into the corresponding olefin; compared with an H-type electrolytic tank, after the gas diffusionelectrode is used, the reaction current density is multiplied, the reaction voltage and the reaction current can reach 1 Acm<-2> or above by regulating and controlling the reaction voltage, and the Faraday efficiency of a target olefin product is remarkably improved and reaches 95% or above; and compared with the traditional thermal catalysis technology, the method can selectively reduce the gas-phase alkyne into olefin at normal temperature and normal pressure without hydrogen consumption, can greatly reduce the energy consumption in the process, better meets the requirements of green chemical industry, and has great strategic significance.

The invention relates to a continuous ring-opening production process for epoxy-terminated polyether and belongs to the technical field of organic polymer compounds. Allyl alcohol polyoxyethylene ether and epichlorohydrin are adopted as raw materials. The process includes mixing the allyl alcohol polyoxyethylene ether and the epichlorohydrin, heating, continuously feeding the mixture to a two-stage fixed bed reactor, performing a ring-opening reaction under catalysis of a solid superacid, adding a product collected by a collecting tank at the lower end of the reactor to a reaction kettle through a metering pump every 2-4 h, adding an alkali and a quaternary ammonium salt catalyst, stirring for 1-4 h while maintaining the temperature, filtering to obtain a crude product, performing vacuum distillation to recover the epichlorohydrin, and purifying to obtain a qualified product. The process is applied for producing the epoxy-terminated polyether, and has advantages of a high equipment utilization rate, a high production efficiency, and the like.

The invention discloses a method for removing dibenzothiophene contained in fuel oil through catalytic oxidation, and belongs to the technical field of chemical engineering. According to the invention, the deep removal of the dibenzothiophene contained in the fuel oil is realized by taking binuclear metal phthalocyanine as a catalyst, ionic liquid as an extracting agent and air as an oxidizing agent and adopting a catalytic oxidation extraction coupling method at the mole ratio of sulfur to a catalyst to an extracting agent to an oxidizing agent of 1:(0.00015-0.0015):(0.45-0.85):(2.067-20.67). The method disclosed by the invention has the advantages of moderate reaction condition, small catalyst usage amount and high catalytic activity. According to the invention, the ionic liquid extracting agent is low in cost, and can realize the automatic layering with a reaction system after the reaction is finished, so that the binuclear metal phthalocyanine catalyst coupling ionic liquid has good recycling. The method disclosed by the invention is an environment-friendly production process and has good industrial application prospect.

The invention relates to a structured catalyst for preparing 1,3-propanediol by hydrogenation of a glycerol water solution, and a preparation method of 1,3-propanediol. The catalyst comprises a structured ceramic material, and Pt, X and W supported on the structured ceramic material, wherein the X is one or more selected from a group consisting of La, Sm, Ce, Ru, Ag, Pr, Mn, Co, Pd, Cr, Mo and Rh.The structured catalyst provided by the invention has the advantages of high stability, low pressure drop, uniform bed distribution, no catalyst abrasion, simple amplification, flexible operation andthe like, and is suitable for the preparation of 1,3-propanediol by hydrogenation of the glycerol water solution. The 1,3-propanediol is prepared by adopting the method provided by the invention, theraw materials are easy to obtain, the reaction conditions are mild, the reaction temperature is proper, only water is needed as a solvent, the production rate of 1,3-propanediol is high, and the preparation method meets the requirement of green chemical industry and has a great market value and industrial application prospect.

The invention provides a preparation method of a low polymerization cyclic polymer, and the method comprises the following steps: (1-1) in an organic solvent A, terephthaloyl chloride and 1,4-butanediol undergo esterification reaction under the action of an alkali A to obtain a hydroxyl n-butyl terephthalate mixture (mixture 1), and (1-2) in an organic solvent B, the hydroxyl n-butyl terephthalatemixture (mixture 1) obtained in the step (1-1) and the terephthaloyl chloride undergo cyclization under the action of an alkali B to obtain a low polymerization cyclic polymer mixture (mixture 2). The method has the advantages of simple synthesis route and high atom utilization rate, and four low polymerization cyclic polymers (I) can be prepared by only two steps of reaction, the reaction conditions are mild, high temperature and high pressure steps are not required, and guarantee is provided for safe production.

The invention belongs to the technical field of prevention and controlling of unorganized emission of dust in storing and transporting processes of coal, and discloses a white dust suppressant and a preparation method and application thereof. The white dust suppressant is prepared by the following raw materials in parts by weight: 50-200 parts of polyether diol with molecular weight of 1000, 50-200 parts of polyether diol with molecular weight of 2000, 10-50 parts of epoxy resin E-40 or E-20, 25-100 parts of polyethylene glycol, 50-200 parts of titanium oxide, 25-100 parts of calcium carbonate or argil or diatomite, 5-10 parts of copolymer containing acid group, 2-20 parts of sodium tripolyphosphate or sodium metasilicate, 20-200 parts of propylene glycol methyl ether acetate or 2,2,4-trimethyl-1,3-amyl glycol monoisobutyrate, 5-30 parts of toluene diisocynate, 5-15 parts of N-methyldiethanolamine, 5-15 parts of organic solvent, and 200-500 parts of deionized water.

The invention relates to a preparation method of a dihydrooxazinyl naphthalene compound. The method comprises the following steps: adding a catalyst, paraformaldehyde, an arylamine compound and naphthol into water in sequence; fully reacting at the temperature of 20-80 DEG C to obtain reaction liquid; performing extracting, drying, concentrating and column chromatography isolation on the reaction liquid in sequence according to a conventional method to obtain a product I or a product II, wherein the structure formula of the product is shown in the specifications. The method has the advantages of mild conditions, short reaction time, easiness in operation, high yield, environmental friendliness, realization of scale production and good industrial application prospect.

The invention discloses a preparation method of albendazole, which comprises the following steps of: dissolving 4-propylthio-o-phenylenediamine in methanol, cooling, keeping the temperature at 0-5 DEGC, slowly dropwise adding cyanogen chloride for reaction under the condition of uniform stirring, and regulating and keeping the pH value at 4-5 in the process; heating to 35-45 DEG C after dropwiseadding is finished, carrying out heat preservation for 1-2 hours, then carrying out atmospheric distillation to recover methanol to obtain a solid-liquid mixed aqueous solution, and carrying out cooling, filtering and drying to obtain 6-propylthio-2-amino-1-hydrogen-benzo [d] imidazole; adding the obtained product into methanol, stirring, cooling, maintaining the temperature at 5-10 DEG C, slowlydropwise adding methyl chloroformate, and adjusting and maintaining the pH value at 6-7; after dropwise adding is finished, heating to 35-45 DEG C, keeping the temperature for 1-2 hours, distilling atnormal pressure to recover methanol, cooling to 15-20 DEG C, and performing filtering and drying to obtain an albendazole product. The method has the advantages of mild process conditions, low cost of used raw materials, water saving, strong reaction activity, good selectivity, high product yield and good product quality.

The invention discloses a preparation method and application of a plant polyphenol based rubber accelerator. The preparation method comprises the following steps: (1) dissolving secondary amine containing a rubber accelerator into a formaldehyde absolute ethyl alcohol solution and stirring; (2) reflowing and stirring in an acid adjusting water bath; (3) adding plant polyphenol into absolute ethyl alcohol, carrying out acid adjustment and ultrasonic oscillation, and continually reacting; (4) standing a reaction product at low temperature and filtering; (5) adding distilled water into filtrate and separating out the plant polyphenol based multifunctional accelerator; washing with water, filtering and drying to obtain a final product. The plant polyphenol based rubber accelerator integrates a plurality of functions of rubber vulcanization, white carbon black surface modification, ageing prevention and the like and is a multi-functional rubber accelerator, and has the characteristic of environment friendliness; the multifunctional auxiliary agent has moderate preparation conditions; a few of reaction byproducts are generated, the yield is high and the cost is low; the requirements of green chemical are met; the plant polyphenol based rubber accelerator is applied to white carbon black rubber and the strength and elongation properties and dynamic mechanical properties of the rubber can be effectively improved; the plant polyphenol based rubber accelerator can be applied to green tire tread rubber.

The invention provides a preparation method of tetraimidazole hydrochloride, which comprises the following steps: preparing tetraimidazole; the preparation method comprises the following step: reacting tetraimidazole, 1, 2-dibromoethyl benzene and 2-aminothiazoline hydrochloride to generate tetraimidazole. The synthetic route is shorter, the comprehensive yield is higher than that of other processroutes, styrene is used as an initiator, tetra-imidazole free alkali is used as a final product, the yield of the hydroxysalt process route is about 65%, the yield of the N (2chloroethyl) alpha (chloromethyl) benzylamine hydrochloride process route is about 72%, and the yield can reach 85% or above when the patent route is used. Meanwhile, the problem of large amount of waste water and waste saltgenerated by multi-step reactions such as chlorination, hydrolysis and cyclization is avoided, the investment of reaction equipment such as an autoclave is avoided, the green chemical engineering requirement is met, the economic benefit is remarkable, and the industrial prospect is good.

The invention discloses a 4-(diethoxy-phosphoryl)-2-methyl-but-2-enoate preparation method, which comprises: (a) carrying out an oxidation reaction on a pyruvic aldehyde aqueous solution to obtain a pyruvic acid/pyruvate aqueous solution; and (b) carrying out a reaction on the pyruvic acid/pyruvate aqueous solution and tetraethyl ethylene diphosphate, and performing an esterification reaction withan alcohol to obtain 4-(diethoxy-phosphoryl)-2-methyl-but-2-enoate. The method of the invention has advantages of cheap and easily available raw materials, simple operation of each step, high yield of the whole route, and high industrial application value.

The invention discloses an ultrasonic leaching-extracting separating method of enriched rare earth ore, which is characterized by the following: leaching enriched yttrium rare earth ore, leached liquid and extract in the same container; extracting group by group; separating; obtaining yttrium hydrochlorate or enriched sulfate material as residual phase and non-yttrium rare earth element hydrochlorate or enriched sulfate material as extracting phase.