发明名称 |
METHOD FOR PURIFYING 2,3,3,3-TETRAFLUOROPROPENE |
摘要 |
The present invention provides a method for purifying HFO-1234yf, comprising the steps of (1) cooling a liquid mixture containing HFO-1234yf and HF to separate the mixture into a upper liquid phase having a high concentration of HF and a lower liquid phase having a high concentration of 2,3,3,3-tetrafluoropropene; and (2) subjecting the lower liquid phase obtained in step (1) to a distillation operation to withdraw a mixture containing HFO-1234yf and HF from a top of a distillation column, thereby obtaining substantially HF-free HFO-1234yf from a bottom of the distillation column. According to the present invention, HF and HFO-1234yf contained in a mixture containing HF and HFO-1234yf can be separated under simple and economically advantageous conditions. |
申请公布号 |
EP2499110(A1) |
申请公布日期 |
2012.09.19 |
申请号 |
EP20100781536 |
申请日期 |
2010.11.09 |
申请人 |
DAIKIN INDUSTRIES, LTD. |
发明人 |
CHAKI, TAKEHIRO;TAKAHASHI, KAZUHIRO;TANAKA, YOSHINORI;YOSHIMI, HITOSHI |
分类号 |
C07C17/383;C07C21/18 |
主分类号 |
C07C17/383 |
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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