Process for producing 2,2,3,3,-tetrafluorooxetane

Details Process for producing 2,2,3,3,-tetrafluorooxetane Process for producing 2,2,3,3,-tetrafluorooxetane

2005-02-10

2010-06-15

Qazi, Sabiha (Department: 1612)

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

Organic compounds

Carboxylic acids and salts thereof

Reexamination Certificate

active

07737299

ABSTRACT:
In the production of 2,2,3,3-tetrafluorooxethane by reaction of tetrafluoroethylene with a compound of formaldehyde generation source in anhydrous hydrogen fluoride, the reaction is carried out in the presence of polyfluoroalkylcarboxylic acid or polyfluoroalkyl ester thereof, represented by the following general formula RfCOORf′ (where Rf is a polyfluoroalkyl group having 1-5 carbon atoms, and Rf′ is a hydrogen atom or a polyfluoroalkyl group having 1-5 carbon atoms), preferably CF3COOH, CF3COOCH2CF2CF3, or CF3COOCH2CF3, whereby a high reaction yield can be attained.

REFERENCES:
patent: 4886581 (1989-12-01), Ohsaka et al.
patent: 4908460 (1990-03-01), Ohsaka et al.
patent: 4946972 (1990-08-01), Ohsaka et al.
patent: 5519151 (1996-05-01), Petrov et al.
patent: 6753301 (2004-06-01), Howell et al.
patent: 7232932 (2007-06-01), Howell et al.
Weinmayr, “Hydrogen Fluoride as a Condensing Agent. VI. Reactions of Fluoroolefins with Formaldehyde Hydrogen Fluoride,” JOC 28 pp. 492-494 (1963).

Affiliated with

Also associated with

Rating

Process for producing 2,2,3,3,-tetrafluorooxetane does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for producing 2,2,3,3,-tetrafluorooxetane, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing 2,2,3,3,-tetrafluorooxetane will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4164612