Method for the separation of hfa 134a

Details Method for the separation of hfa 134a Method for the separation of hfa 134a

B - Operations, Transporting

01

D

B01D 3/36 (2006.01) C01B 7/19 (2006.01) C07C 17/38 (2006.01) C07C 17/383 (2006.01)

Patent

CA 2045753

A method for separating HFA 134a from an HFA 134a-rich mixture thereof with HF and/or HCFC 1122 which comprises feeding the mixture to a distillation column to separate an azeotrope or near-azeotrope of HFA 134a and HF and/or HCFC 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.

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