|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||55/16 ; 55/68 ; 55/158 ; 55/528|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 5 인용 특허 : 13|
A method for producing an improved membrane for separating gases in mixtures including forming an integral, asymmetric polyether imide membrane, treating the membrane with at least one organic fluid which is a solvent or swelling agent for polyether imide, and removing the organic fluid from the membrane by evaporation to obtain a tubular, flat or hollow fiber membrane exhibiting significantly higher selectivity than an untreated membrane.
A method for producing integral, asymmetric membranes for separating gases in mixture, comprising: mixing together a polyether imide membrane forming polymer which forms membranes that are permeable to at least one gas in a mixture of gases, a volatile solvent for said polymer having a lower boiling point than any other component in the mixture, and an organic liquid swelling agent in which said polymer is not soluble and which does not react with either said polymer or said solvent, to form a pourable liquid mixture; spreading said liquid mixture to for...