49 results about "Tetraethylammonium chloride" patented technology

The invention discloses a synthesis method of methyl picolinate. The method comprises the following steps that 2-bromopyridine, N,N-dimethylformamide or acetonitrile and tetraethylammonium chloride or tetraethylammonium bromide or tetraethylammonium iodide or tetraethylammonium tetrafluoroborate or tetrabutylammonium chloride or tetrabutylammonium bromide or tetrabutylammonium iodide are mixed into an electrolyte; carbon dioxide is introduced for 30min at normal pressure; then, electric carboxylation reaction is performed by using constant current (the carbon dioxide is continuously introduced in the electrolysis process until the electrolysis is completed); then, the methyl picolinate is obtained through esterification and post treatment. A reaction system is simple; the control is easy; in addition, rich Cl resources and CO2 are used as one of raw materials; the raw materials are cheap and can be easily obtained; the cost is low; a novel path is developed for the study on challenging organic matters of green synthetic heterocyclic ring carboxylic acid derivatives and the like.

The invention discloses a synthetic method of thiazole-4-formic acid. The method comprises the steps that 4-bromo-thiazole is added into a quaternary ammonium salt solution to prepare electrolyte, theconstant current is connected into the electrolyte to conduct an electric carboxylation reaction in the atmosphere of carbon dioxide, an acetonitrile water solution is adopted to conduct hydrolysis,and thiazole-4-formic acid can be obtained, wherein quaternary ammonium salt is selected from tetraethylammonium chloride hydrate, tetraethylammonium bromide, tetraethylammonium iodide, tetraethyl tetrafluoroborate, tetrabutylammonium chloride hydrate, tetrabutylammonium bromide and tetrabutylammonium iodide, the solvent of the electrolyte is N,N-dimethyl formamide or acetonitrile. The reaction system of the synthetic method is simple, the condition is moderate, the process is easy to control, carbon dioxide can be utilized, and a route is provided for solution of greenhouse effect gas.

The invention relates to a copper-based catalyst with high activity and stability for acetylene hydrochlorination. According to the copper-based catalyst, a copper salt is taken as an active component, wherein the copper salt is selected from one or more of copper chloride, copper nitrate, copper sulfate and copper phosphate. The copper-based catalyst is characterized in that a stabilizer is introduced into the copper-based catalyst; and the stabilizer is selected from one or more of guanidine hydrochloride, tetramethylethylenediamine hydrochloride, tetramethylammonium chloride, tetraethylammonium chloride, benzyltrimethylammonium chloride, benzyl triethyl ammonium chloride, tetramethyl phosphorus chloride, tetrabutyl phosphorus chloride, methyl triphenyl phosphorus chloride and 1-butyl triphenylphosphonium. Through introducing the stabilizer has the advantages of being low in cost, low in toxicity, good in heat stability and small steam pressure into the catalyst, and the stability of the copper-based catalyst for acetylene hydrochlorination is significantly improved.

A production method of 2-chloro-1,3,3,3-tetrafluoropropene (1224) according to the present invention includes bringing 2,3-dichloro-1,1,1,3-tetrafluoropropane (234da) into contact with an inorganic base having a pKa of 4.8 or greater in an aqueous medium in the presence of a phase transfer catalyst. Preferably, the inorganic base has a pKa of 10 or greater. Further, the phase transfer catalyst is preferably at least one selected from the group consisting of tetrabutylammonium bromide, methyltri-n-octylammonium chloride, benzyltrimethylammonium chloride and tetraethylammonium chloride. It is possible by this method to selectively produce 1224 from 234da.

The invention discloses a method for preparing bio-based plastic through esterification modification of wood fiber. The method comprises the following steps: drying and crushing wood fiber biomass; pretreating the powder by ball-milling; swelling and dissolving in a DMSO(Dimethylsulfoxide) / TEAC(Tetraethylammonium Chloride) solution system; adding SAA(Surface Active Agent) and DMAP(Dimethylaminopyridine) for reaction; dissolving out the reaction product by using acetone, standing, extracting and drying to acquire the bio-based plastic. The method mainly has the advantages that 1) the raw materials are wide in source and low in cost; 2) cellulose, hemicellulose and lignose in the wood fiber biomass are comprehensively utilized, and a traditional mode of simple modified utilization of cellulose through separation, extraction and modification is changed; 3) the traditional pretreatment mode through a chemical method is changed through the pretreatment by ball milling, so that the use of lots of highly corrosive reagents and solvents is avoided; 4) the reaction is carried out at normal temperature or low temperature, the reaction time is short, the modification process is simple and easy to operate, and the industrial application prospect is wide; 5) the modified product has good thermal plasticity and can be injected and molded into various plastic products with good mechanical properties.

The invention relates to a novel benzene series volatile organic compound absorbent and its preparation method and application. The preparation method comprises the following steps: mixing oleic acid and tetraethylammonium chloride according to the molar ratio of (2-5): 1 Heating to 70° C. to 120° C. and stirring until the solution is clear and transparent, then stopping heating, then cooling the solution to room temperature naturally, and stopping stirring to obtain a novel benzene-based volatile organic compound absorbent. Compared with traditional organic solvents and ionic liquids, the absorbent has the advantages of low price, good biodegradability, difficult volatilization, easy recovery, and simple preparation. The process can effectively remove benzene-based volatile organic compounds in the exhaust gas, and the removal rate of benzene-based volatile organic compounds is as high as 90%.

The invention discloses a preparation method for catalyzing pyrimidine cyclic hydroxyl chlorination by tetraethylammonium chloride, which comprises the following steps: (1) adding phosphorus oxychloride into a container, adding tetraethylammonium chloride as a catalyst, adding a pyrimidine cyclic hydroxyl compound, and heating to react; (2) preparing an alkali liquor, cooling to 0 DEG C, and slowly dropwise adding an obtained reaction liquid into the alkali liquor for quenching to obtain a target product. The method has the advantages that the provided pyrimidine cyclic hydroxyl chlorination catalysis method is small in environmental pollution, the obtained product is light in color, the catalysis efficiency is high, and the phosphorus oxychloride recovery pressure is small.

The invention discloses a synthetic method of thiazole-4-formic acid. The method comprises the steps that 4-bromo-thiazole is added into a quaternary ammonium salt solution to prepare electrolyte, theconstant current is connected into the electrolyte to conduct an electric carboxylation reaction in the atmosphere of carbon dioxide, an acetonitrile water solution is adopted to conduct hydrolysis,and thiazole-4-formic acid can be obtained, wherein quaternary ammonium salt is selected from tetraethylammonium chloride hydrate, tetraethylammonium bromide, tetraethylammonium iodide, tetraethyl tetrafluoroborate, tetrabutylammonium chloride hydrate, tetrabutylammonium bromide and tetrabutylammonium iodide, the solvent of the electrolyte is N,N-dimethyl formamide or acetonitrile. The reaction system of the synthetic method is simple, the condition is moderate, the process is easy to control, carbon dioxide can be utilized, and a route is provided for solution of greenhouse effect gas.

The invention discloses a synthesis method for a Silicalite-1 molecular sieve, wherein the method comprises the following steps: (1) mixing evenly a silicon source, a structure directing agent and water with an optionally alkali source, to obtain a reaction mixture with the molar ratio of SiO2 to R to OH<-> to H2O of 1 to (0.05-0.39) to (0.05-2) to (2-100), wherein R represents the mole number of the structure directing agent, and the structure directing agent is at least one selected from the group consisting of tetraethylammonium hydroxide, tetraethylammonium bromide, tetraethylammonium chloride, tetraethylammonium fluoride, tetraethylammonium iodide and triethylamine; (2) according to the molar ratio of a mineralization agent to OH<-> of (1-5) to 1, adding the mineralization agent to the reaction mixture obtained in the step (1), stirring evenly, crystallizing for 0.5-60 days at the temperature of 80-200 DEG C and at the self-generated pressure, to obtain a crystallized product; and (3) recycling the crystallized product obtained in the step (2). By the synthesis method, the Silicalite-1 molecular sieve with perfect and uniform crystal grains and fewer skeleton defects can be synthesized under the action of the novel structure directing agent.

The invention discloses a water-permeable paving material and a preparation method and application thereof. The water-permeable paving material comprises, by weight, 60-90 parts of quartz sand, 10-40 parts of Portland cement, 2-10 parts of hydrophilic epoxy resin binders, 0.5-5 parts of curing agents and 1-10 parts of water. The curing agents include one or more of aliphatic polyamine and cycloaliphatic polyamine curing agents or aromatic ring polyamine curing agents. The hydrophilic epoxy resin binders comprise, by weight, 500-950 parts of bisphenol A epoxy resin, 1-200 parts of surfactant span, 1-200 parts of surfactant tween and 0.001-0.005 part of catalysts, wherein the catalysts can be tetraethylammonium chloride, butyl triphenyl phosphorus bromide, benzyl triethyl ammonium bromide, benzyl triethyl ammonium chloride, 2- methylimidazole or optional combination of the above substances. The water-permeable paving material is prepared by uniformly stirring the quartz sand, the Portland cement, the water, the hydrophilic epoxy resin binders and the curing agents; and then placing the stirred mixture into a mould for molding and curing for 24 hours at the normal temperature prior to demolding. The water-permeable paving material is used for preparing pavement bricks, pavement slabs and sewage filtering prefabricated members by means of molding.

The invention discloses a high-cleanness agent for removing mercaptan in gasoline. The high-cleanness agent is prepared from the following components in parts by weight: 30 to 60 parts of tetraethylammonium chloride, 20 to 40 parts of glycerol, 20 to 30 parts of ethylene glycol, 15 to 30 parts of potassium hydroxide, 10 to 15 parts of lignosulfonate and 10 to 30 parts of water. Meanwhile, the invention also discloses a method for the high-cleanness agent for removing the mercaptan in the gasoline. Compared with a traditional technology, the high-cleanness agent disclosed by the invention has the advantages of low production cost, low consumption, high intersolubility with the gasoline and high mercaptan removing efficiency; meanwhile, the content of chloride ions is low, so that secondary pollution to the environment is avoided.