- Safe, environment-friendly and controllable synthetic process of di-epoxide
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The invention relates to the field of synthesis of epoxide, and more specifically, relates to a safe, environment-friendly and controllable synthetic process of di-epoxide. The synthetic process of the di-epoxide at least comprises the following steps: mixing diolefin, carboxylic acids, basic salt and solvent, and cooling; dropwise adding a hydrogen peroxide solution for 1-12 h; standing for layering to obtain a lower layer organic phase-1, washing the organic phase-1 with a cleaning solution, and standing for layering to obtain a lower layer organic phase-2; purifying. The reaction system ofthe synthetic process is simple, environmentally friendly, safe and controllable, is low in production cost, and can meet the requirements of technical economy; the prepared di-epoxide is high in purity and yield and low in solvent content, chroma and halogen content, and is suitable for large-scale industrial production.
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Paragraph 0084-0100; 0298-0312
(2019/10/01)
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- PROCESS FOR THE EPOXIDATION OF OLEFINS
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The subject invention is related to a process for the epoxidation of olefin with peroxide, comprising reacting peroxide with olefin in the presence a solvent, wherein the solvent has Hansen Solubility Parameters (HSPs) of δT,solvent and δH,solvent and the epoxide product has Hansen Solubility Parameters (HSPs) of δT,product and δH,product, and wherein: [in-line-formulae]δT,product?6≦δT,solvent≦δT,product+6, and[/in-line-formulae] [in-line-formulae]δH,product?6≦δH,solvent.[/in-line-formulae]
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Paragraph 0056-0058
(2016/04/19)
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- The method for producing the epoxy compound
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PROBLEM TO BE SOLVED: To provide a high-purity epoxy compound.SOLUTION: (1) A method for producing the epoxy compound includes subjecting a compound having a carbon-carbon double bond to an oxidation reaction in the presence of hydrogen peroxide, a quaternary ammonium salt, and polyacids and subsequently removing the quaternary ammonium salt remaining in the reaction mixture by a phenol formaldehyde-based resin. (2) The production method described in (1) uses the phenol formaldehyde-based resin having a phenolic hydroxyl group and an amino group as functional groups.
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Paragraph 0063
(2017/05/26)
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- The method for producing the epoxy compound
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PROBLEM TO BE SOLVED: To provide a process for producing an alicyclic epoxy compound using hydrogen peroxide, which efficiently gives polyfunctional epoxy resins, to provide a curable resin composition containing an epoxy resin obtained by the production process for the epoxy resins, and to provide cured products thereof. SOLUTION: There is provided the epoxidation method including an oxidizing reaction of carbon-carbon double bonds using hydrogen peroxide, in which at least two kinds of tungstic acids, phosphoric acid (or a phosphate), a quaternary ammonium salt having ≥16 carbon atoms in total, and an aqueous hydrogen peroxide solution are essentially used. COPYRIGHT: (C)2011,JPOandINPIT
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Paragraph 0065; 0068; 0073
(2018/07/03)
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- Highly selective epoxidation of cycloaliphatic alkenes with aqueous hydrogen peroxide catalyzed by [PO4{WO(O2) 2}4]3-/imidazole
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In the presence of imidazole as an additive, a phosphorus-containing tetranuclear peroxotungstate, THA3[PO4{WO(O 2)2}4] (I, THA=tetra-n-hexylammonium), could act as an efficient catalyst for epoxidation of cycloaliphatic alkenes with 30% aqueous hydrogen peroxide (H2O2). Compound I showed higher catalytic activity and selectivity to epoxide than other tungstates. By using the I/imidazole system, various kinds of cycloaliphatic alkenes could be highly selectively converted into the acid-sensitive epoxides including industrially important diepoxides in high to excellent yields under the almost stoichiometric conditions. The 1H NMR spectroscopy showed that imidazole would work not only as a proton acceptor but also as a Lewis base to remarkably suppress the acid-catalyzed ring opening of epoxides.
- Kamata, Keigo,Sugahara, Kosei,Ishimoto, Ryo,Nojima, Susumu,Okazaki, Motoya,Matsumoto, Takaya,Mizuno, Noritaka
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p. 2327 - 2332
(2014/08/18)
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- PROCESS FOR PRODUCING EPOXY COMPOUND
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According to the present, invention, a process for producing an epoxy compound, where an epoxy compound can be selectively produced from olefins with good yield at low cost in a safe manner by a simple operation under mild conditions without using a quaternary ammonium salt or a metal compound, is provided. The present invention relates to a process for producing an epoxy compound, comprising epoxidizing a carbon-carbon double bond of an organic compound having a carbon-carbon double bond by using hydrogen peroxide as an oxidant, wherein the epoxidation is carried by out using an organic nitrile compound and an organic amine compound.
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Page/Page column 6
(2012/02/06)
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- PROCESS FOR PRODUCING EPOXIDES FROM OLEFINIC COMPOUNDS
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A process for producing an epoxide such as a cycloaliphatic diepoxide by the reaction of an olefin such as a cycloaliphatic diene with hydrogen peroxide (H2O2) as an oxidant in the presence of a catalytic system under pH control for example at a pH of less than about 5. The present invention is advantageously used for the epoxidation of olefinic compounds such as olefins and aliphatic or aromatic dienes.
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Page/Page column 20-22
(2008/06/13)
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