- Method for removing unsaturated impurities in 1, 1, 2, 3, 3 and 3 - hexafluoropropyl hydrofluoroether crude product
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The invention provides a method of removing 1. [] The hydrofluoroether impurities, pentafluoropropylene hydrofluoroether, and, 1 1 pentafluoropropylene 2 hydrofluoroether 3 impurities 3 can 3 - be well separated to provide, hexafluoropropyl hydrofluoroether product 1 having a 1 2 purity of 3 3 - at least. 1 2 1, 2, 3, 3, 3 - 3 1 1 3 3 - 99% 3 3 - 2 3The method does not use dangerous chemical, greatly improves the operation safety, does not generate waste harmful to the environment, and can be regenerated and reused by the adsorbent silica gel column. Cost is reduced, and resources are saved.
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Paragraph 0065-0073
(2021/10/27)
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- Fluoride-catalyzed hydroalkoxylation of hexafluoropropene with 2,2,2-trifluoroethanol
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Trifluoroethoxylation of hexafluoropropene with 2,2,2-trifluoroethanol (TFE) were conducted using an alkali metal fluoride catalyst to produce CF3CHFCF2OCH2CF3. KF exhibited the highest yield and selectivity of CF3CHFCF2OCH2CF3, whereas LiF and NaF were inactive for the trifluoroethoxylation reaction. The same reaction also proceeded well in the presence of RbF or CsF, but yielded large amounts of olefinic and high molecular weight side products, implying that the size of alkali metal cation or the degree of MF dissociation plays an important role in determining the activity and the product composition. FT-IR and NMR experiments revealed that CsF interacts with TFE more strongly than KF through a hydrogen bonding. The experimental and spectroscopic results suggest that the degree of MF dissociation should be in the medium range for the selective production of CF3CHFCF2OCH2CF3 in high yield and selectivity.
- Natalia, Debby,Nguyen, Dinh Quan,Oh, Ji Hee,Kim, Honggon,Lee, Hyunjoo,Kim, Hoon Sik
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p. 474 - 477
(2008/12/22)
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- METHOD FOR PROCESSING FLUORINATED ALKYL ETHER
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Disclosed is a method for commercially producing a high-purity fluorinated alkyl ether wherein the content of impurities having an unsaturated bond is extremely low. Specifically disclosed is a method for processing a fluorinated alkyl ether characterized in that a reaction crude liquid containing a fluorinated alkyl ether, which is obtained by reacting a fluorinated alkyl alcohol and a fluorinated olefin in the presence of a basic catalyst, and an unsaturated impurity having an unsaturated bond, which is by-produced during the reaction, is brought into contact with a chlorine gas so that the unsaturated impurity is converted into a chlorine addition product, thereby decreasing the unsaturated impurity content in the reaction liquid.
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Page/Page column 7-8
(2008/06/13)
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- Palladium(0)-catalyzed hydroalkoxylation of hexafluoropropene: Synthesis of hydrofluoroethers under neutral conditions
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No vinyl ether by-products are formed in the palladium(0)-complex catalyzed hydroalkoxylation of hexafluoropropene (see scheme). Saturated hydrofluoro-ethers are selectively synthesized with alcohols or phenols under neutral conditions in the presence of
- Matsukawa, Yasuhisa,Mizukado, Junji,Quan, Heng-Dao,Tamara, Masanori,Sekiya, Akira
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p. 1128 - 1130
(2007/10/03)
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- Polyfluorinated carbocations stabilized by oxygen and sulfur
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Polyfluorinated oxonium cations RfCH2OCFX(+) and acyclic perfluorinated sulfonium cations RfSCF2(+) are prepared by the reaction of corresponding ethers or sulfides with antimony pentafluoride in SO2ClF solvent and characterized by 19F and 1H spectroscopy. Based on experimental data the relative stability of polyfluorinated oxonium cations are determined.
- Petrov, Viacheslav A.,Davidson, Fred
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