发明名称 |
Prozess zur Abtrennung von 1,1,1,2-Tetrafluorethan aus Gemischen desselben mit Fluorwasserstoff und/oder 1-Chlor-2,2-difluorethylen. |
摘要 |
<p>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. <IMAGE></p> |
申请公布号 |
DE69104426(T2) |
申请公布日期 |
1995.02.16 |
申请号 |
DE1991604426T |
申请日期 |
1991.06.18 |
申请人 |
IMPERIAL CHEMICAL INDUSTRIES PLC, LONDON, GB |
发明人 |
TAYLOR, ANDREW MARK, HUNTINGDON, CHESTER CH3 6DY, GB;WHEELHOUSE, ROBERT WILLIAM, CHESHIRE WA7 4AL, GB |
分类号 |
C01B7/19;C07C17/38;C07C17/383;C07C19/08;(IPC1-7):C07C19/08 |
主分类号 |
C01B7/19 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|