43 results about "Halogenated alcohol" patented technology

A process for preparing a halogenated alcohol comprising hydrolyzing a halogenated precursor of the halogenated alcohol in water at a temperature near but below the critical point of water. For example, the halogenated alcohol has the formula CF3(CF2)nCH2OH, wherein n is zero or a whole number from 1 to 5, the halogenated precursor has the formula CF3(CF2)nCH2Cl, wherein n is as defined above, and the process comprises hydrolyzing the halogenated precursor in water at a temperature near but below the critical point of water. In a particularly preferred embodiment, the halogenated alcohol has the formula CF3CH2OH, the halogenated precursor has the formula CF3CH2Cl, and the process comprises hydrolyzing CF3CH2Cl in water at a temperature near but below the critical point of water.

The invention discloses a preparation process of an epoxy compound. The preparation process comprises the steps of enabling alkene to react with a halogenating agent in water or a mixed solvent, and performing alkali treatment to obtain the epoxy compound. The epoxy compound can be prepared through a one-pot method by preparing halogenated alcohol through reaction between a halogenating reagent containing NBS and alkene and then enabling the halogenated alcohol to react with alkali without the separation of intermediates. The preparation process disclosed by the invention avoids highly-toxic and high-explosive reagents applied to a conventional process method, so that the production of the epoxy compound can be safely amplified.

The invention discloses a polymerizable type thioxanthone visible light initiator containing acrylate or methacrylate and a preparation method of the polymerizable type thioxanthone visible light initiator. Thioxanthone containing an aromatic amino group can be directly reacted with various types of halogenated alcohol to generate thioxanthone containing an aliphatic hydroxyl group; the thioxanthone containing the aromatic amino group can also be reacted with 4-benzoyloxy benzyl chloride, and then is subjected to alcoholysis to generate thioxanthone containing a phenolic hydroxyl group; the thioxanthone containing the phenolic hydroxyl group can be reacted with the various types of halogenated alcohol to generate thioxanthone containing the aliphatic hydroxyl group; then the thioxanthone containing the phenolic hydroxyl group or the thioxanthone containing the aliphatic hydroxyl group is reacted with acryloyl chloride or methacryloyl chloride to form the polymerizable type thioxanthone visible light initiator containing an acrylate structure or a methacrylate structure. The compound disclosed by the invention has very good compatibility with a light curing system; in an application process, any additive does not need to be added, and any auxiliary agent does not need to be added; the polymerizable type thioxanthone visible light initiator is high in initiation efficiency, green and environment-friendly and low in energy consumption, meets the requirements of green chemistry, and has a wide application prospect in the field of visible light curing.

A method for efficiently manufacturing a vegetable glycosphingolipid having reduced unpleasant odor using a barley-derived starting material is provided. The method for manufacturing a vegetable glycosphingolipid according to the present invention comprises an extraction step (2) for preparing a mixture with a non-halogenated alcohol-based solvent and heating the starting material mixture, and a fatty acid removal step (3) for removing fatty acids from the extract obtained in the extraction step (2).

The invention relates to a method for preparing a high-temperature and strong alkali resistant type anion exchange resin. The method comprises the following steps: 1) allowing styrene polymer to react with chloromethyl ether, then stopping the reaction, washing and drying to obtain chloromethylated beads; 2) mixing C1-C12 long-chain halogenated alcohol with solvent, dropwise adding a trimethylamine aqueous solution to react, and after the reaction is finished, distilling out the solvent; cooling to room temperature, dropwise adding the chloromethylated beads to react, after the reaction, distilling out the solvent, and washing to obtain the strong alkali resistant type anion exchange resin. The method can be used for large-scale industrial production and is economic and environment-friendly, and the product has relatively high heat-resisting stability and can be used in the fields of high-temperature condensation water treatment, high-temperature catalysis and the like.

The invention discloses a method for catalytic synthesis of R-2-bromo-1-aryl alcohol using carrot root whole cells. As shown in the formula, the method uses carrot root whole cells as a biocatalyst which catalyzes asymmetric reduction of alpha-bromo-aryl ethyl ketone under a proper condition to synthesize the corresponding R-2-bromo-1-aryl alcohol, the enantiomer excess is over 82.5%, and in the formula, R is H, p-CH3, p-OCH3, p-Cl, p-NO2, m-Cl and other different substituent groups. The chiral halogenated alcohol R-2-bromo-1-aryl alcohol synthesized using the method of the invention is an important chiral synthesis building block, and can also be transformed to chiral synthesis building block with alpha site being another group, so that R-2-bromo-1-aryl alcohol has high application value in synthesis of medicines, pesticides, additives and other chiral compounds.

The present disclosure relates to a method for preparing haloalcohols, the method comprising: contacting olefins, hydrogen halides, oxidants and protecting agents in the presence of a catalyst, wherein the catalyst is a titanium-silicon molecular sieve catalyst; the protecting agent It is a compound containing carbonyl and / or cyano, or, the protecting agent is a compound that can generate carbonyl and / or cyano during the reaction. The method has the advantages of simple operation process, mild reaction conditions, high raw material conversion rate and halogenated alcohol selectivity, and long service life of the catalyst.

The invention discloses a method for preparing β-halogenated ether and β-halogenated alcohol catalyzed by peroxidase. It includes the following steps: adding hydrogen peroxide, halogen salt, and alkene shown in formula III in the buffer solution, and finally adding peroxidase, and reacting to obtain the β-halohydrin shown in formula I; when the above reaction system When also adding the alcohol shown in formula IV, the β-halogenated ether shown in formula II is obtained; in formula I, formula II, formula III, and formula IV, R 1 is alkyl, phenyl, substituted phenyl, aryl or substituted aryl; R 2 is hydrogen, alkyl, phenyl, substituted phenyl, aryl or substituted aryl; wherein, also includes R 1 and R 2 linked as cycloalkyl; R 3 is alkyl, phenyl, substituted phenyl, aryl, or substituted aryl. The raw material of the invention is simple and easy to obtain, the reaction conditions are mild, and the operation is simple and convenient.

The invention discloses an acid clean fracturing fluid and a preparation method thereof and belongs to the technical field of oil production engineering in the petroleum industry. The acid clean fracturing fluid can be obtained by using two organic acids, N,N-dimethylamino compound and halogenated alcohol as raw materials to synthesize a dimeric surfactant and then mixing and stirring the dimericsurfactant with hydrochloric acid and water according to a certain ratio. Compared with a traditional acid fracturing fluid, the acid clean fracturing fluid disclosed by the invention has the advantages that the usage of the dimeric surfactant is small (0.5-1%), the formation acidification capacity is high (the HCl concentration is 20%), the temperature resisting and shear resisting performance isgood, the sand carrying performance is good, gel breaking is easy, and there is no residue after gel breaking.

The invention discloses a method for preparing a gemini surfactant by a one-pot method and belongs to the field of organic chemical synthesis. The method for preparing the gemini surfactant by the one-pot method is characterized in that the gemini surfactant is synthesized from organic acids, N,N-dimethyl amine compounds and halogenated alcohols with ionic liquid serving as a catalyst and polyalcohols serving as solvents through the one-pot method. Compared with a traditional two-step method for preparing the gemini surfactant, the method has the advantages that the method is simple in preparation technology, simple and convenient to operate, low in energy consumption and cost and extremely suitable for industrial production. When used for preparing oil-field clean fracturing fluid by serving as a thickening agent, the gemini surfactant has the advantages of high resistance to temperature and shearing, excellent sand-carrying performance without addition of a gel breaker and reverse discharging and the like.

The present invention relates to the field of organic synthesis, and provides a phosphorus-containing flame retardant and a preparation method thereof. The phosphorus-containing flame retardant has a chemical formula such as formula (i), and the preparation method includes the following steps: (1) combining DOPO and Dibasic carboxylic acid was added to toluene, stirred and heated to 110±2°C, reacted for 2 to 6 hours, stopped heating, and filtered the reacted solution to obtain a white solid, dried to obtain DOPO dibasic carboxylic acid derivative (2) Dissolve DOPO dibasic carboxylic acid derivatives in 2±0.2mol / L potassium hydroxide solution at a temperature of 0-40°C and stir for 1.5-2.5 hours to generate DOPO dibasic carboxylic acid derivatives Potassium salt; (3) Add a phase transfer catalyst and a halogenated alcohol to the solution prepared in step (2), react for 4 to 8 hours, pour into a separating funnel to separate layers, and remove the lower layer to obtain the phosphorus-containing flame-retardant agent. (i).

The present invention relates to a method for fluoromethylation of haloalcohols. The method includes providing the formula R 1 C(CX 3 ) 2 The α-halohydrin step of OH, where R 1 selected from hydrogen, alkyl. The α-halohydrin and the chemical formula are CH 2 (OR 2 ) 2 The first compound reacts in the presence of an acid catalyst to form an acetal. The resulting acetal is chlorinated with a chlorinating agent to form the formula R 1 C(CX 3 ) 2 OCH 2 Chloride of Cl. The chloride is then converted to the chemical formula R with a fluorinating agent 1 C(CX 3 ) 2 OCH 2 Fluoride of F.

The invention provides a titanium-containing solid catalyst component for ethylene polymerization in a slurry process. The solid catalyst component is prepared by dissolving magnesium halide in an organic epoxy compound and an organic phosphorous compound, adding electrons to form uniform solution, reacting the solution and halide of transition metal titanium or derivative solution of the halide,and after the catalyst solid is separated out, adding a halogenated alcohol compound for modification and thus obtaining the solid catalyst component. The catalyst system consisting of the titanium-containing solid catalyst component is applied to the ethylene polymerization and has high activity and high bulk density. At the same time, the obtained polymer has a relatively good particle form.

The invention provides a cyclic sulfide preparation method. The cyclic sulfide preparation method includes the following steps that (A) one of halogenated alcohol and halogenated epoxy propane is mixed with an alkaline catalyst in a solvent to obtain a mixed solution; (B) the mixed solution is mixed with a sulfur hydrogenated metallic solution, reaction is performed after air is led, and a compound with a structure shown by a formula (II); (C) thiourea and a water-soluble solvent are mixed, a catalyst is added, then the compound with the structure shown by the formula (II) is added, cooling is performed after first reaction, the obtained product is mixed with an alkaline solution, and the cyclic sulfide with a structure shown by a formula (I) is obtained after second reaction. This application also provides a preparation of sulfur compounds, the difference is that step C). The difference of the cyclic sulfide preparation method is the step (C). The cyclic sulfide prepared by means of the cyclic sulfide preparation method is short in reaction time, high in reaction efficiency and high in yield and content.