- Preparation method of 3,3,3-trifluoropropylene carbonate
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The invention discloses a preparation method of 3,3,3-trifluoropropylene carbonate. The preparation method comprises the steps: with trifluoropropylene as a raw material, carrying out several simple reaction steps to obtain trifluoroepoxy propane, introducing carbon dioxide into a high-pressure reaction kettle by taking a metal conjugated microporous polymer complex as a catalyst, and preparing 3,3,3-trifluoropropylene carbonate at the temperature of 25-100 DEG C and the pressure of 0.1Mpa-3Mpa. Compared with the prior art, the method has the advantages that trifluoropropylene is taken as theraw material, so that the raw material cost is substantially lowered; and meanwhile, the yield is relatively high, and the catalyst can be repeatedly used, so that the method is suitable for industrial production.
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Paragraph 0067-0069
(2019/03/08)
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- Method for preparing 3,3,3-trifluoro propanol
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The invention discloses a method for preparing 3,3,3-trifluoro propanol. The method comprises the following steps: adding 2-bromine-3,3,3-trifluoro propanol, a solvent, a catalyst and an acid-binding agent into a high pressure kettle, pressurizing to be 2-8Mpa, and heating to be 70-100 DEGC to react for 2-6 hours, thereby obtaining 3,3,3-trifluoro propanol. The total yield is 85.7% calculated from 3,3,3-trifluoro propene. The method is mainly used for preparing 3,3,3-trifluoro propanol.
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Paragraph 0014; 0015
(2016/12/01)
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- A method for preparing three fluorine epoxy propane
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The invention relates to a preparation method of trifluoro epoxypropane, which comprises the following steps: (1) in the presence of sulfuric acid, performing reflux reaction on 3,3,3-trifluoro-2-bromopropyl acetate and alcohol to prepare 3,3,3-trifluoro-2-bromopropanol; and (2) dropwisely adding the 3,3,3-trifluoro-2-bromopropanol into a mixture of alkali and water at 70-120 DEG C, and reacting to prepare trifluoro epoxypropane. According to the invention, the 3,3,3-trifluoro-2-bromopropyl acetate used as a raw material is subjected to ester exchange to obtain the 3,3,3-trifluoro-2-bromopropanol, the treatment method is simple, green and environment-friendly; a catalyst concentrated sulfuric acid is reusable; and the preparation efficiency of the 3,3,3-trifluoro-2-bromopropanol is high. Meanwhile, the trifluoro epoxypropane reaction yield is high.
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Paragraph 0024; 0025
(2017/03/17)
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- Methods for preparing Halohydrins and methods for preparing Epoxides
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The invention includes methods for preparing halohydrins and epoxides. A method of preparing halohydrins can include exposing (R1CHXCH2O—)2SO2 to R2COOH to produce R1CHXCH2COOR2 and hydrolyzing the R1CHXCH2COOR2 to produce the halohydrin R1CHXCH2OH. R1 and R2 can be the same or different single elements and/or organic groups and X can be a halogen. A method of preparing an epoxide can include combining a sulfuric acid containing solution with a halogen to produce a first mixture and exposing the first mixture to trifluoropropene to produce a second mixture. The second mixture can be combined with acetic acid to produce an acetyl halohydrin of trifluoropropene and the acetyl halohydrin can be hydrolyzed to form a halohydrin of trifluoropropene. The halohydrin can be converted to a trifluoropropyl epoxide.
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Page/Page column 2
(2010/11/29)
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- Preparative-scale synthesis of 3,3,3-trifluoropropene oxide
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Bromination of 3,3,3-trifluoropropene in 20% oleum, followed by treatment with acetic acid furnishes 2-bromo-3,3,3-trifluoropropyl acetate in quantitative yield, which upon acid hydrolysis and cyclization with alkali affords 3,3,3-trifluoropropene oxide (TFPO) in 63% overall yield.
- Ramachandran, P. Veeraraghavan,Padiya, Kamlesh J.
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p. 1255 - 1259
(2008/02/10)
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