199 results about "Chloroacetates" patented technology

The invention discloses polymerizable free radical II type photoinitiators shown as formulae I and II in the description and a preparation method of the photoinitiators. Carboxylic acid compounds containing type II photo-initiation functional groups are taken as raw materials and subjected to a substitution reaction with methyl chloroacetate under an alkaline condition, then a product is subjectedto transesterification with hydroxy compounds containing polymerizable groups, and the polymerizable photoinitiators are generated. The photoinitiators structurally contain the polymerizable groups,so that the compatibility of the photoinitiators with a photopolymerization system is improved, and surface mobility is reduced greatly in the photocuring process; the photoinitiators can also serve as monomers for synthesis of macromolecular photoinitiators, thereby having broad application prospect in the field of photocuring.

The invention relates to a liquid fuel, and particularly a liquid carbonaceous fuel of the mixture of hydrocarbons and alcohol ether. The alcohol ether gasoline used in new energy vehicles comprises 25 to 85 percent of gasoline constituents and 15 to 75 percent of alcohol ether-major other chemical raw materials by weight percentage, wherein the components of the alcohol ether-major other chemical raw materials and the weight proportions thereof in the alcohol ether gasoline used in new energy vehicles are as follows: industrial methanol: 10 to 60 percent, n-hexane: 0 to 3 percent, isopropyl chloride: 0 to 1 percent, trichloroethylene: 0 to 1 percent, epichlorohydrin: 0.2 to 3 percent, bromoethanol: 0.2 to 2 percent, isodibutyl ether: 0.5 to 2 percent, ethylene glycol monobutyl ether: 0 to 1 percent, lauric acid : 0.4 to 2 percent, methyl chloroacetate: 0 to 4 percent, isopropyl nitrate: 0.2 to 4 percent, trimethyl phosphate: 0 to 3 percent, nitromethane: 0.1 to 1 percent, nitroethane: 0 to 1 percent, nitroguanidine: 0 to 3 percent, cyclopentadiene: 0 to 4 percent, and n-butylamine: 0 to 1 percent.

The invention provides a method for synthesizing fatty alcohol-polyoxyethyleneether carboxylate, which belongs to the technical field of synthesis of an anion surfactant in organic chemistry. The method uses fatty alcohol-polyoxyethyleneether and chloracetate as raw materials, leads the fatty alcohol-polyoxyethyleneether to perform a carboxy methylation reaction by a new catalyst under protection of inert gas, adds an ethanol solution of an alkali metal hydroxide after reaction so as to adjust the range of pH, and filters the pure fatty alcohol-polyoxyethyleneether carboxylate obtained after inorganic salt is dried in the ethanol, wherein the new catalyst can be sodium alcoholate and / or kalium alcoholate; and a ratio of the catalyst to the pure fatty alcohol-polyoxyethyleneether by weight can be 1:1.0-2.0. The method adopts the new high-efficiency catalyst with high conversion rate of the product, and can obtain the pure fatty alcohol-polyoxyethyleneether carboxylate. Compared with the prior method, the method has a more advanced and reasonable process, and saves equipment investment.

The invention relates to wine yeast with low yield of higher alcohol. The wine yeast is characterized in that a certain amount of isoamyl chloroacetate is added in a flat plate for cultivating yeast, the isoamyl chloroacetate generates chloroacetic acid under the catalysis of saccharomycetes isoamyl acetate hydrolase; the chloroacetic acid has a strong restraining effect on the growth of saccharomycetes, if the activity of the ester decomposition enzyme of a mutant strain is high (the higher the activity of the ester decomposition enzyme is, the more higher alcohol produced by the strain is), more chloroacetic acid is produced by decomposition, so that a bacterial colony grows slowly under the inhibition effect of the chloroacetic acid. The wine yeast can be utilized to accurately, conveniently and quickly screen out saccharomycetes with low yield of the higher alcohol. When the saccharomycetes with low yield of the higher alcohol, which is bred through the wine yeast, is used for producing grape wine, the content of the higher alcohol in the grape wine can be lowered by about 10% to 15%; when the saccharomycetes with low yield of the higher alcohol, which is bred through the wine yeast, is used for alcohol fermentation, the content of the higher alcohol in grape wine can be lowered effectively, and the health-care values of the grape wine can be improved.

The invention relates to a novel method for preparing methyl chloroacetate. The method is characterized in that resin modified by acidic ionic liquid is taken as a catalyst and a section of fixed bed reactor is just adopted for completing the method; no aqueous solution needs to be added in the preparation process; the method is low in reaction temperature, simple in flow, low in investment cost and low in energy consumption; the conversion rate of the methyl chloroacetate is above 99.5% and the selectivity of the methyl chloroacetate is 100%.

The invention discloses a preparation method of a quaternary ammonium type hydrophilic amino-modified silicone oil emulsion. The preparation method includes the following preparation steps that firstly, amino-modified silicone oil is prepared from alpha,omega-hydroxy polydimethyl siloxane (linear organosilicon), an amino coupling agent, a sealing agent and a basic catalyst, then the amino-modified silicone oil and dimethylaminoethyl methacrylate react, acrylate-modified amino-modified silicone oil is obtained, and finally quaternization is carried out through methyl chloroacetate. The quaternary ammonium type hydrophilic amino-modified silicone oil emulsion is simple in preparation process, has self-emulsifying performance, and is used for after-finishing of fabrics, and the fabrics are made to have excellent soft and slip hand feeling, and are low in yellowing, small in color alteration and good in hydrophilicity.

The invention relates to a synthetic method of 2-thiopheneacetic acid, and the synthetic method comprises the following steps: adding thiophene, methylbenzene and aluminium chloride anhydrous into a reaction container, dropping methyl chloroacetate while heating to 50-60 DEG C, and performing heat preservation after dropping; after cooling a reaction liquid to room temperature, pouring proper ice water and hydrochloric acid, layering, extracting the water layer by using proper methylbenzene, drying the organic layer by using anhydrous sodium sulphate, filtering, and concentrating a filtrate and alkaline liquor to be dry so as to obtain 2-thiophene methyl acetate; adding a sodium hydroxide aqueous solution and 2-thiophene methyl acetate into the reaction container, heating to 70-80 DEG C, performing heat preservation for 2-3 hours, cooling to room temperature after performing heat preservation, adjusting ph to 0.5 by using concentrated hydrochloric acid, cooling to 0-10 DEG C, performing heat preservation for 1-2 hours, filtering, and drying the filter cake to obtain 2-thiopheneacetic acid. The synthetic method of 2-thiopheneacetic acid disclosed by the invention has the advantages of being short in process route, cheap and easily available in raw materials, high in yield, good in product quality and suitable for large-scale production.

The invention belongs to the technical field of fine chemical engineering, in particular to an environmental-protection preparation method of betaine hydrochloride, which is characterized by comprising the following steps: firstly, carrying out neutralization reaction by taking calcium hydroxide or calcium oxide, chloroacetic acid, trimethylamine and sulfuric acid as raw materials to generate calcium chloroacetate; carrying out quaternization reaction with the trimethylamine; and then acidizing with the sulfuric acid to prepare the betaine hydrochloride. The invention does not need expensive alkali and salt, and therefore, the cost is 15-20 percent lower than that of the traditional process; the product has simple and sufficient separation, and three wastes can not be generated, and therefore, the betaine hydrochloride has higher economy and environment protection.

The invention relates to alkylamine ether derived surfactants with chemical structures as shown in a formula I, a formula II and a formula III in the specification. In the formulas, R1 and R2 are respectively selected from the group consisting of C4-C22 straight-chain or branched-chain saturated alkyl or unsaturated alkyl; EO and PO are described in the specification; R1 and R2 are the same or different; and a and b are integers in a range of 0 to 100 and are not 0 at the same time. The invention also relates to a method for preparing the alkylamine ether derived surfactants. The method comprises the following steps: subjecting secondary amine ether and chloroacetate to a reaction under hydroxide of a metal so as to generate secondary amine ether carboxylate; and acidifying the secondary amine ether carboxylate with hydrochloric acid, and separating the obtained product so as to obtain amine ether carboxylic acid, or subjecting secondary amine ether and phosphorus pentoxide to phosphate esterification so as to obtain monoester and diester of secondary amine ether. According to different adduct number of an amine ether alkyl group, PO and EO, performances of the finally-obtained surfactants are adjusted from a molecular structure. The synthetic method provided by the invention is simple and convenient, facilitates to operation and has little harm to the environment. According to the invention, the secondary amine ether carboxylic acid is described as the formula I in the specification; the secondary amine ether phosphate diester is described as the formula II in the specification; and the secondary amine ether phosphate monoester is described as the formula III in the specification.

The invention discloses a preparation method of lesinurad. The method comprises: allowing 1-cyclopropylnaphthalene-4-yl isorhodanate and acethydrazide to undergo an addition reaction, allowing the obtained 4-acetyl-1-(4-cyclopropylnaphthalene-1-yl) thiosemicarbazide to undergo a cyclization reaction in the function of an alkali reagent, allowing the obtained 4-(4-cyclopropylnaphthalene-1-yl)-5-methyl-4H-1,2,3-triazole-3-mercaptan and methyl chloroacetate (or methyl bromoacetate) to undergo a condensation reaction, allowing the obtained 2-{[4-(4-cyclopropylnaphthalene-1-yl)-5-methyl-4H-1,2,4-triazole-3-yl]sulfo} methyl acetate to undergo an oxidation reaction, allowing the obtained 5-[(methoxycarbonyl)methylthio]-4-(4-cyclopropylnaphthalene-1-yl)-4H-1,2,4-triazole-3-carboxylic acid undergo a bromination reaction, and carrying out an esterolysis reaction to obtain lesinurad. The method is reasonable and simple in technical route, simplified in operation and low in cost. The method is green and eco-friendly and suitable for industrial production.