发明授权
- 专利标题: Aromatic polyimide gas-separating membrane
- 专利标题(中): 芳香族聚酰亚胺气体分离膜
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申请号: US393820申请日: 1982-06-30
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公开(公告)号: US4474858A公开(公告)日: 1984-10-02
- 发明人: Hiroshi Makino , Yoshihiro Kusuki , Takashi Harada , Hiroshi Shimazaki , Tosio Isida
- 申请人: Hiroshi Makino , Yoshihiro Kusuki , Takashi Harada , Hiroshi Shimazaki , Tosio Isida
- 申请人地址: JPX Yamaguchi
- 专利权人: UBE Industries, Ltd.
- 当前专利权人: UBE Industries, Ltd.
- 当前专利权人地址: JPX Yamaguchi
- 优先权: JPX56-107136 19810710
- 主分类号: B01D53/22
- IPC分类号: B01D53/22 ; B01D61/38 ; B01D71/64 ; C08G73/00 ; C08G73/10 ; C08J9/40 ; C08L79/08 ; B01D59/14
摘要:
An aromatic polyimide membrane having an excellent gas-separating property comprises (A) a substrate consisting of a porous membrane comprising at least one aromatic polyimide having at least 80 molar % of at least one type of recurring unit of the formula (I): ##STR1## wherein R is a tetravalent aromatic radical and R.sup.1 is a divalent aromatic radical, the porous membrane exhibiting a hydrogen gas permeability (PH.sub.2) of 1.times.10.sup.-5 to 5.times.10.sup.-1 cm.sup.3 /cm.sup.2.sec.cmHg and a ratio of hydrogen gas permeability (PH.sub.2) to carbon monoxide gas permeability (PCO) of 2 to 5; and (B) 50% or more, based on the weight of the porous membrane substrate, of a gas-separating liquid contained in the porous membrane substrate, the gas-separating liquid being substantially incapable of dissolving therein the porous membrane substrate and having a boiling point of 180.degree. C. or more.