- Method for removing unsaturated impurities in 1, 1, 2, 3, 3 and 3 - hexafluoropropyl hydrofluoroether crude product
-
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.
- -
-
Paragraph 0039-0056
(2021/10/27)
-
- Hydrofluoroether continuous synthetic method
-
The invention discloses a hydrofluoroether continuous synthetic method which is characterized by comprising the following steps of mixing alcohol, a solvent and a composite catalyst, heating a mixtureto 50 DEG C, then introducing the heated mixture and fluorine-containing olefin into a tubular reactor together for reaction, and separating a reaction liquid to obtain a hydrofluoroether product, wherein the molar ratio of the alcohol, the solvent, the composite catalyst and the fluorine-containing olefin is 1 to (1-5) to (0.1-0.25) to (1-1.5), the reaction temperature is 50-150 DEG C, and the reaction time is 5-25s. By adopting the hydrofluoroether continuous synthetic method provided by the invention, a synthetic process is improved so as to be the hydrofluoroether continuous synthetic method which is simple in synthetic process, large in operation flexibility and low in cost and is environmentally friendly.
- -
-
Paragraph 0032-0033
(2018/06/26)
-
- Fluorine gas for life science syntheses: Green metrics to assess selective direct fluorination for the synthesis of 2-fluoromalonate esters
-
Optimisation and real time reaction monitoring of the synthesis of 2-fluoromalonate esters by direct fluorination using fluorine gas is reported. An assessment of green metrics including atom economy and process mass intensity factors, demonstrates that the one-step selective direct fluorination process compares very favourably with established multistep processes for the synthesis of fluoromalonates.
- Harsanyi, Antal,Sandford, Graham
-
supporting information
p. 3000 - 3009
(2015/05/27)
-
- Palladium(0)-catalyzed hydroalkoxylation of hexafluoropropene: Synthesis of hydrofluoroethers under neutral conditions
-
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
-
p. 1128 - 1130
(2007/10/03)
-
- Synthesis and use of partially fluorinated dialkyl ethers derived from hexafluoropropylene
-
A procedure was developed for preparing partially fluorinated dialkyl ethers by the reaction of hexafluoropropylene with aliphatic and polyfluorinated alcohols in the presence of KOH. On treatment with concentrated sulfuric acid, these ethers form alkyl esters of acids, and on treatment with KOH, alkenyl ethers.
- Il'in,Bakhmutov,Ivanova,Furin,Tolstikova,Sukhinin
-
-
- FACILE SYNTHESIS OF DIALKYL FLUOROMALONATES AND THEIR DERIVATIVES
-
Dimethyl and diethyl fluoromalonates were prepared by the stepwise basic alcoholysis of hexafluoropropene in a total yield of 50 - 55 percent.These dialkyl fluoromalonates were alkylated with alkyl halides, and the resulting dialkyl α-fluoroalkylmalonates were cyclized with urea affording 5-fluorobarbituric acid derivatives.
- Ishikawa, Nobuo,Takaoka, Akio
-
p. 107 - 110
(2007/10/02)
-
