Semi-permeable membranes consisting predominantly of polycarbonates
derived from tetrahalobisphenols
    34.
    发明授权
    Semi-permeable membranes consisting predominantly of polycarbonates derived from tetrahalobisphenols 失效
    半透膜主要由衍生自四卤双酚的聚碳酸酯组成

    公开(公告)号:US4818254A

    公开(公告)日:1989-04-04

    申请号:US141878

    申请日:1988-01-06

    摘要: The invention is an improved gas separation membrane comprising a thin, discriminating layer consisting predominantly of a carbonate polymer derived from a bisphenol corresponding to Formula I ##STR1## wherein R at each occurrence is independently H, Cl, Br, or C.sub.1 -C.sub.4 alkyl and R.sup.1 is ##STR2## --S--, --SO.sub.2 --, --O--, or a C.sub.1 -C.sub.6 divalent hydrocarbon or a C.sub.1 -C.sub.6 divalent fluorocarbon radical or inertly substituted hydrocarbon radical, with the proviso that at least 25 weight percent of the moieties derived from the bisphenol of Formula I present in the discriminating layer bear R groups which are exclusively Br or Cl, the gas separation membrane exhibiting a separation factor for oxygen and nitrogen at 24.degree. C. of at least 6.1. In another aspect this invention relates to a process for separating oxygen from nitrogen, or a nitrogen-containing gas.

    摘要翻译: 本发明是一种改进的气体分离膜,其包括主要由衍生自对应于式I的双酚的碳酸酯聚合物组成的薄的鉴别层,其中R在每次出现时独立地为H,Cl,Br或C 1 -C 4烷基, R 1是-S-,-SO 2 - , - O-或C 1 -C 6二价烃或C 1 -C 6二价氟代烃基或惰性取代的烃基,条件是至少25重量%的部分 衍生自鉴别层中存在的式I的双酚的R基团仅具有Br或Cl,气相分离膜在24℃下表现出氧和氮的分离因子至少为6.1。 另一方面,本发明涉及从氮气或含氮气体中分离氧气的方法。