Producing CF.sub.3 CH.sub.2 CF.sub.3 and/or CF.sub.3 CH=CF.sub.2

Details Producing CF.sub.3 CH.sub.2 CF.sub.3 and/or CF.sub.3 CH=CF.sub.2 Producing CF.sub.3 CH.sub.2 CF.sub.3 and/or CF.sub.3 CH=CF.sub.2

1995-02-22

1996-05-14

Siegel, Alan

Organic compounds -- part of the class 532-570 series

Organic compounds

Halogen containing

570177, C07C 1702

Patent

active

055169465

ABSTRACT:
A process is disclosed for producing CF.sub.3 CH.sub.2 CF.sub.3 and/or CF.sub.3 CH.dbd.CF.sub.2 from at least one ether compound selected from the group consisting of compounds having the formula (CF.sub.3).sub.2 CHCF.sub.2 OR and compounds having the formula (CF.sub.3).sub.2 C.dbd.CFOR (wherein R is an alkyl group of the formula C.sub.n H.sub.2n+1 and n is an integer from 1 to 6) by contacting the ether compound(s) with water at an elevated temperature of at least about 75.degree. C. The reaction of ether compound(s) with water may be employed in connection with a process for producing tetrafluoroethylene and/or hexafluoropropylene by pyrolysis, where by-product perfluoroisobutylene is reacted with an alkanol to produce the ether compound(s).

REFERENCES:
Hall, C. R. et al, Chem. Ind. (London), 5, 145-146 (1989).
Koshar, R. J. et al, Addition of Alcohols to Octafluoroisobutene, 79, 1741-1744 (Apr. 1957).
Kocharyan, S. T. et al, "Alkylating Properties of Alkyl Perfluoroisobutenyl Ethers. Communication 1. Complexes of Alkyl Perfluoroisobutenyl Ethers with Trialkylamines", translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 5, 846-854, Apr. 1968 (Institute of Heteroorganic Compounds, Academy of Sciences of the USSR).

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