|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||55/16 ; 55/21 ; 55/69|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 30 인용 특허 : 2|
An improved process for separating gases using a hollow fiber membrane on an intermittent basis is described. It has been found that if the pressure on the feed side of the membrane is maintained essentially constant or is allowed to vary slowly during operation and in the periods between operating cycles the useful lifetime of the separation device is greatly extended. This process is particularly useful for the separation of air into oxygen- and nitrogen-enriched streams using hollow fibers melt spun from poly(4-methylpentene-1).
In a process for separating gases from a mixture using a device containing a hollow fiber membrane preferentially permeable to at least one component of the gas mixture wherein the separation process is intermittent and the device is to be used in at least 1000 operating cycles separated by periods of non-use, the improvement wherein the pressure on the feed stream side of the membrane is maintained essentially constant or is varied relatively slowly during cycling between periods of non-use and initiation of gas separation such that after 1000 cycles of...