Hexafluoropropylene oxide synthesis
- Product Name:Hexafluoropropylene oxide
- CAS Number:428-59-1
- Molecular formula:C3F6O
- Molecular Weight:166.02
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Yield:428-59-1 95.6%
Reaction Conditions:
with 1-pyrrolidone in 1,1,2-Trichloro-1,2,2-trifluoroethane;N,N-dimethyl-formamide at 20; for 6 h;Sealed tube;Reagent/catalyst;Temperature;Solvent;
Steps:
1-6 Example 6
The embodiment of the present application provides a sixth method for preparing hexafluoropropylene oxide. The specific steps are as follows:Add 1.0 mol of pyrrolidine nitrogen oxide (CAS: 77161-24-1, Pyrrolidine, 1-oxide)Add to a 2L stainless steel reaction kettle with mechanical stirring, add 250mL of N, N-dimethylformamide and 300mL of 1,1,1,3,3-pentafluorobutane C4H5F5, and start stirring after sealing. After a homogeneous liquid phase is exhibited, the liquid phase feed inlet is opened, and 100 mL of 1,1,2-trichloro-1,2,2-trifluoroethane is added. Stirring was continued, and the external circulation freezing bath was turned on to maintain 20 ° C. The gas-phase feed inlet was opened, and 0.3 mol of hexafluoropropylene C3F6 was passed in. After that, a total of 0.55 mol of hexafluoropropylene C3F6 was added after 6 hours. Samples were taken during the period and analyzed by gas chromatography. When the content of hexafluoropropylene C3F6 in the raw material no longer decreased, the reaction was judged to be terminated. After analysis by gas chromatography, the yield was 95.6% and the selectivity was 88.1%. The post-processing steps are the same as in Example 1.
References:
Guangdong Dianwang Co., Ltd.;Guangdong Dianwang Co., Ltd. Electricity Sciences Institute;Tang Nian;Li Li;Li Xiaodian;Zhou Yongyan;Zhang Manjun CN110590711, 2019, A Location in patent:Paragraph 0033-0050
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