Process for the preparation of perfluorosuccinylfluoride

Details Process for the preparation of perfluorosuccinylfluoride Process for the preparation of perfluorosuccinylfluoride

1990-04-26

1992-03-03

Cintins, Marianne

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

Organic compounds

Carboxylic halides

562851, C07C 51305

Patent

active

050935232

ABSTRACT:
A perfluorosuccinylfluoride is prepared by the reaction of a gaseous mixture of 1,4-dibromoperfluorobutane with SO.sub.3 in oleum with at least 65% of free SO.sub.3 containing a catalyst comprising, besides mono- and bi-valent mercury sulphates, B.sub.2 O.sub.3 in quantities of from 0.3% to 8% by weight with respect to the free SO.sub.3 present in the "oleum" during course of the reaction.

REFERENCES:
patent: 3102139 (1963-08-01), Lawlor et al.
patent: 3160659 (1964-12-01), Dittman et al.
patent: 3725475 (1973-04-01), Paucksch et al.
patent: 3899531 (1975-08-01), Siegemund
patent: 4116977 (1978-09-01), Yamabe et al.
Patent Abstracts of Japan, vol. 6, No. 110, 22 Jun. 1982, JP-A-5740434 (Asahi Class).
Patent Abstracts of Japan, vol. 8, No. 138, 27 Jun. 1984, JP-A-5948436 (Daikin Kogyo).

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