公开(公告)号：US5591250A

公开(公告)日：1997-01-07

申请号：US368995

申请日：1995-01-05

申请人： S. Alexander Stern ,  Hiroyoshi Kawakami ,  Ajay Y. Houde ,  Guangbin Zhou

发明人： S. Alexander Stern ,  Hiroyoshi Kawakami ,  Ajay Y. Houde ,  Guangbin Zhou

IPC分类号： B01D53/22 ,  B01D71/62 ,  B01D71/64 ,  C07C7/144

CPC分类号： B01D71/64 ,  B01D53/228 ,  B01D71/62 ,  C07C7/144 ,  B01D2257/504 ,  Y02C10/10 ,  Y02P20/152

摘要： A process for separating a first gas from a second gas, having the steps of: (1) contacting one side of a semi-permeable gas separation membrane with a feed gas mixture containing at least the first gas and the second gas, wherein the membrane divides a separation chamber into a high-pressure side into which the feed gas mixture is fed and a low-pressure side; (2) maintaining a pressure differential across the membrane under conditions such that the first gas in the feed gas mixture selectively permeates through the membrane from the high-pressure side to the low-pressure side of the membrane; (3) removing from the low-pressure side of the membrane permeated gas mixture which is enriched in the first gas and depleted in the second gas; and (4) removing from the high-pressure side of the membrane a gas mixture which is enriched in the second gas and depleted in the first gas. The membrane used is made, at least in part, of a thin discriminating layer of polyimide having the repeating formula ##STR1## wherein R is: ##STR2##

摘要翻译： 一种用于从第二气体分离第一气体的方法，具有以下步骤：（1）使半透气分离膜的一侧与至少包含第一气体和第二气体的进料气体混合物接触，其中所述膜 将分离室分成进料气体混合物供给的高压侧和低压侧; （2）在使得进料气体混合物中的第一气体从膜的高压侧到低压侧选择性渗透通过膜的条件下，保持跨膜的压差; （3）从富含第一气体并且耗尽第二气体的膜渗透气体混合物的低压侧除去; 和（4）从膜的高压侧除去富含第二气体并耗尽第一气体的气体混合物。 所使用的膜至少部分地由具有重复式“IMAGE”的聚酰亚胺的薄识别层制成，其中R是：式3或式（I）图式 5 OR 公式6