Process for the preparation of fluorinated halocarbons

Details Process for the preparation of fluorinated halocarbons Process for the preparation of fluorinated halocarbons

2008-07-29

2008-07-29

Parsa, Jafar (Department: 1621)

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

Organic compounds

Halogen containing

C570S170000

Reexamination Certificate

active

12002502

ABSTRACT:
A improved process is described for the preparation of a substantially pure, liquefied stream of 1,1,1,2-tetrafluoroethane by the catalyzed reaction of trichloroethylene with hydrogen fluoride to form the intermediate 2-chloro-1,1,1-trifluoroethane and then reacting said intermediate 2-chloro-1,1,1-trifluoroethane with hydrogen fluoride, in the presence of a hydrofluorination catalyst to form a reaction stream containing 1,1,1,2-tetrafluoroethane. The improvement comprises liquefying the by-product hydrogen chloride formed in the preparation of the intermediate 2-chloro-1,1,1-trifluoroethane and countercurrently passing said liquefied hydrogen chloride thru the reaction stream containing 1,1,1,2-tetrafluoroethane thereby forming a substantially pure, liquefied stream of 1,1,1,2-tetrafluoroethane and an effluent comprising gaseous hydrogen chloride.

REFERENCES:
patent: 4158675 (1979-06-01), Potter
patent: 4967024 (1990-10-01), Gumprecht et al.
patent: 5185482 (1993-02-01), Manzer
patent: 5744658 (1998-04-01), Scott et al.

Affiliated with

Also associated with

Rating

Process for the preparation of fluorinated halocarbons 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 the preparation of fluorinated halocarbons, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the preparation of fluorinated halocarbons will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3931171