- Preparation method of isolated hydrofluoroether
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The invention discloses a preparation method of isolated hydrofluoroether. The preparation method comprises the following steps: in the presence of inorganic fluoride and a co-catalyst, carrying out an alkylation reaction on perfluorinated epoxide and an alkylation reagent in an aprotic polar solvent to obtain the isolated hydrofluoroether. The main raw material perfluorinated epoxide can be prepared by epoxidation of perfluoro-olefin, the raw materials are simple and easy to obtain, the cost is lower than that of perfluorohexanone and perfluoroacyl fluoride compounds, the stability is good, the subsequent reaction is facilitated, and the quality can be ensured. The preparation method has the advantages that the reaction speed is high, the reaction time is short, the raw materials can be completely converted within 3-5 hours, the residual quantity of the raw material perfluorinated epoxy compound in the obtained crude product can be as low as 0.1% or below, and the reaction conversionrate is high. The content of the target product can reach 97% or above, the reaction selectivity is high, the byproducts are few, and the method is suitable for industrial application.
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Paragraph 0050; 0051; 0063; 0064
(2021/03/05)
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- Perfluoroalkyl haloalkyl ethers and compositions and applications thereof
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Described are compositions comprising perfluoroalkyl haloalkyl ethers and, optionally, surfactant; uses for perfluoroalkyl haloalkyl ether compounds and compositions thereof, optionally comprising surfactant; and perfluoroalkyl haloalkyl ethers.
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Page/Page column 13-14
(2008/06/13)
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- FLUOROALIPHATIC ESTERS OF FLUOROSULFONIC ACID. 2. REACTION BIS(FLUOROSULFATO)PERFLUOROALKANES WITH CESIUM FLUORIDE
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2,3-Bis(fluorosulfato)perfluoroalkanes split under the action of CsF in the absence of solvents, giving a mixture of α-fluorosulfatoperfluoro ketones, perfluoroalkene sulfates, and perfluoro α-diketones.The occurence of these reactions in solutions results mainly in the formation of oxides of the corresponding fluoroolefins or products of their conversions.The reactions carried out are the first examples of nucleophilic substitution at a secondary carbon atom in a perfluorinated saturated chain.
- Rogovik, V. M.,Delyagina, N. I.,Mysov, E. I.,Cherstkov, V. F.,Sterlin, S. R.,German, L. S.
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p. 1870 - 1876
(2007/10/02)
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