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研究成果与合作  
Composite Hollow Fiber Membranes Useful for CO2 Removal from Natural Gas
 
成果基本信息
信息分类:  科研成果
专利情况:  已获专利
发布类别:  展示
项目所属单位:  
成果介绍
简介:  Disclosed herein is a composite hollow fiber polymer membrane including a porous core layer and a selective sheath layer. The porous core layer includes a polyamide-imide polymer, or a polyetherimide polymer, and the selective sheath layer includes a polyimide polymer, which is prepared from monomers A, B, and C. The monomer A is a dianhydride of the formulawherein X1 and X2 are independently halogenated alkyl group, phenyl or halogen and R1, R2, R3, R4, R5, and R6 are independently H, alkyl, or halogen. The monomer B is a diamino cyclic compound without a carboxylic acid functionality and the monomer C is a diamino cyclic compound with a carboxylic acid functionality. The polyimide polymer further includes covalent ester crosslinks. Also disclosed herein is a method of making the composite polymer membrane and a process for purifying natural gas utilizing the composite polymer membrane.
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