AZEOTROPE OR AZEOTROPE-LIKE COMPOSITIONS OF 3,3,3-TRIFLUOROPROPYNE (TFPY) AND HYDROGEN FLUORIDE (HF)

    公开(公告)号:US20220363968A1

    公开(公告)日:2022-11-17

    申请号:US17774055

    申请日:2020-11-05

    Abstract: Heterogenous azeotrope or azeotrope-like compositions comprising 3,3,3-trifluoropropyne (TFPY) and hydrogen fluoride (HF) which may include from about 71.5 wt. % to about 98.8 wt. % 3,3,3-trifluoropropyne (TFPY) and from about 1.2 wt. % to about 28.5 wt. % hydrogen fluoride and have a boiling point between about −10.0° C. and about 25.0° C. at a pressure of between about 61 psia and about 171 psia. The azeotrope or azeotrope-like compositions may be used to separate 3,3,3-trifluoropropyne (TFPY) as an impurity from compositions of 2-chloro-3,3,3-trifluoropropene (1233xf), 2-chloro-1,1,1,2-tetrafluoropropane (HCFC-244bb), or 2,3,3,3-tetrafluoropropene (HFO-1234yf).

    GAS PHASE PROCESS FOR CHLOROTRIFLUOROETHYLENE

    公开(公告)号:US20190241489A1

    公开(公告)日:2019-08-08

    申请号:US16267722

    申请日:2019-02-05

    CPC classification number: C07C17/23

    Abstract: The present invention relates to a process for the preparation of haloethylenes, and preferably perhaloethylenes, by the gas-phase dechlorination of haloethanes in the presence of a catalyst and optionally in the presence of an alkene or an alkane. In particular aspects, the invention relates to a gas-phase process for preparing chlorotrifluoroethylene (CTFE). More particularly, the present invention relates to a gas-phase process for preparing CTFE from 1,1,2-trichloro-1,2,2-trifluoroethane (CFC-113) by dechlorination in the presence of an alkene or an alkane and a catalyst.

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