05591250 is referenced by 41 patents and cites 33 patents.

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##

Title
Material and process for separating carbon dioxide from methane
Application Number
104345
Publication Number
5591250
Application Date
January 5, 1995
Publication Date
January 7, 1997
Inventor
Guangbin Zhou
Syracuse
NY, US
Ajay Y Houde
Syracuse
NY, US
Hiroyoshi Kawakami
Hachioji
JP
S Alexander Stern
Manlius
NY, US
Agent
Harris Beach & Wilcox
Assignee
Gas Research Institute
IL, US
IPC
B01D 71/64
B01D 53/22
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