Process for co-producing 1,1,1,2-tetrafluoroethane pentafluoroet

Details Process for co-producing 1,1,1,2-tetrafluoroethane pentafluoroet Process for co-producing 1,1,1,2-tetrafluoroethane pentafluoroet

1996-01-25

1997-08-19

Rotman, Alan L.

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

Organic compounds

Halogen containing

570166, 570169, 570170, C07C 1908, C07C 1720, C07C 1721

Patent

active

056590946

ABSTRACT:
A process for co-production of 1,1,1,2-tetrafluoroethane (HFC-134a;CF.sub.3 CH.sub.2 F), pentafluoroethane (HFC-125; CF.sub.3 CHF.sub.2) and 1,1,1 -trifluoroethane (HFC-143a; CF.sub.3 CH.sub.3) by a two-step gaseous reaction comprising the steps of a) reacting 1,1,1-trifluoro-2-chloroethane (CFCH.sub.2 Cl, HCFC-133a) with HF in a first reactor to prepare 1,1,1,2-tetrafluoroethane (HFC-134a; CF.sub.3 CH.sub.2 F), pentafluoroethane (HFC-125; CF.sub.3 CHF.sub.2) and 1,1,1-trifluoroethane (HFC-143a; CF.sub.3 CH.sub.3); b) adding trichloroethylene (TCE:CCl.sub.2 CHCl) to the reaction product of step a) in a second reactor to prepare HCFC-133a; separating HCl, HFC-134a, HFC-125 and HFC-143a from the reaction product of step b) and recycling HCFC-133a to the first reactor, and the stages being performed in the presence of fluorization catalyst obtained by calcining a reaction product which is obtained by reacting ethanol with a mixture of calcium fluoride(CaF.sub.2) with an aqueous solution of chromium trioxide, zinc chloride and ferrous chloride is provided.

REFERENCES:
patent: 3258500 (1966-06-01), Swamer et al.
patent: 4091043 (1978-05-01), Ohsaka et al.
patent: 4129603 (1978-12-01), Dell
patent: 4990701 (1991-02-01), Cassel et al.
patent: 4990702 (1991-02-01), Fernandez et al.
patent: 5281568 (1994-01-01), Scott et al.
patent: 5494873 (1996-02-01), Tsuji et al.
patent: 5494876 (1996-02-01), Tsuji et al.
patent: 5494877 (1996-02-01), Katsuyuki et al.
patent: 5500400 (1996-03-01), Kim et al.
patent: 5523498 (1996-06-01), Manzer et al.
patent: 5569795 (1996-10-01), Tsuji et al.

Affiliated with

Also associated with

Rating

Process for co-producing 1,1,1,2-tetrafluoroethane pentafluoroet 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 co-producing 1,1,1,2-tetrafluoroethane pentafluoroet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for co-producing 1,1,1,2-tetrafluoroethane pentafluoroet will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1106276