Process for manufacturing 1,1,1,2-tetrafluoroethane

Details Process for manufacturing 1,1,1,2-tetrafluoroethane Process for manufacturing 1,1,1,2-tetrafluoroethane

1996-04-12

1998-11-24

Killos, Paul J.

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

Organic compounds

Halogen containing

570165, 570166, 570167, 570168, C07C 1700

Patent

active

058410074

ABSTRACT:
The present invention relates to a process for manufacturing 1,1,1,2-tetrafluoroethane (HFC-134a) from trichloroethylene (TCE) and hydrogen fluoride (HF) by reacting the HCFC-133a with the HF to produce the HFC-134a and reacting the TCE with the HF to produce 1-choro-2,2,2-trifluoroethane (HCFC-133a), characterized by that a part of said HF is mixed with the mixture containing the HFC-134a and the remaining portion of said HF is fed with said TCE in portions to at least two sections of a reactor for producing said HCFC-133a. According the present process, the temperature change in the reactor for producing HCFC-133a is maintained within a narrow range over the whole reaction procedures, and the catalytic activity is well maintained. Further, the formation of by-products is considerably prevented and thus the productivity is remarkably enhanced.

REFERENCES:
patent: 3728405 (1973-04-01), Thoroughgood
patent: 3787331 (1974-01-01), Groppelli et al.
patent: 3978145 (1976-08-01), Knaak
patent: 3992325 (1976-11-01), Knaak
patent: 4110406 (1978-08-01), Anello et al.
patent: 4158675 (1979-06-01), Potter
patent: 5057634 (1991-10-01), Webster et al.
patent: 5243105 (1993-09-01), Scott et al.
Chem Abst. 121: 86259 15 Mar. 1994.

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