Process for separating HFA 134a

Details Process for separating HFA 134a Process for separating HFA 134a

1991-07-02

1993-05-18

Capossela, Ronald C.

Refrigeration

Processes

Circulating external gas

62 24, 570262, F25J 300

Patent

active

052110206

ABSTRACT:
A method for separating HFA 134a from an HFA 134a-rich mixture thereof with HF and/or CFC 1122 which comprises feeding the mixture to a distillation column to separate an azeotrope or near-azeotrope of HFA 134a and HF and/or CFC 1122 from a residue comprising substantially pure HFA 134a. Starting from an HF-rich mixture of HFA 134a such as a typical product stream in HFA 134a production, the method includes a first distillation step to separate HF from the initial mixture and produce an azeotrope or near azeotrope of HFA 134a and HF which is an HFA 134a-rich mixture.

REFERENCES:
patent: 4373942 (1983-02-01), Wright
patent: 4599096 (1986-07-01), Burr

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