发明名称 |
Fremgangsmåde til adskillelse af 1,1,1,2-tetrafluorethan fra blandinger deraf med hydrogenfluorid og/eller 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 |
DK0467531(T3) |
申请公布日期 |
1994.10.31 |
申请号 |
DK19910305504T |
申请日期 |
1991.06.18 |
申请人 |
IMPERIAL CHEMICAL INDUSTRIES PLC |
发明人 |
TAYLOR, ANDREW MARK;WHEELHOUSE, ROBERT WILLIAM |
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 |
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代理人 |
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主权项 |
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地址 |
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