发明名称 |
Process for the purification of a pentafluoroethane azeotrope |
摘要 |
The invention generally relates to a process for the purification of a component of a binary azeotrope in which the composition of the azeotrope changes by about 10 mole percent with pressure comprising: (a) subjecting a binary azeotrope to a distillation step in which most of one of the binary components is removed as distillate (distillate 1) with the bottoms (bottoms 1) enriched in the other component; (b) subjecting distillate 1 to at least one additional distillation step conducted at a different pressure in which most of the component recovered as bottoms 1 is removed as distillate 2 with the bottoms 2 enriched in the component enriched in distillate 1; (c) optionally repeating step (b) as many times as desired; and (d) recovering the desired purified component. The invention is particularly useful in the purification of pentafluoroethane in a pentafluoroethane/chloropentafluoroethane azeotrope.
|
申请公布号 |
US5346595(A) |
申请公布日期 |
1994.09.13 |
申请号 |
US19930023827 |
申请日期 |
1993.02.23 |
申请人 |
ALLIEDSIGNAL INC. |
发明人 |
CLEMMER, PAUL G.;TUNG, HSUEH S.;SMITH, ADDISON M. |
分类号 |
B01D3/14;C07B63/00;C07C17/383;C07C19/08;(IPC1-7):B01D3/14;C07C17/38 |
主分类号 |
B01D3/14 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|