Polymide gas separation membranes
    2.
    发明授权
    Polymide gas separation membranes 失效
    聚合物气体分离膜

    公开(公告)号:US06790263B1

    公开(公告)日:2004-09-14

    申请号:US09661902

    申请日:2000-09-14

    IPC分类号: B01D7164

    摘要: Soluble polyamic acid salt (PAAS) precursors comprised of tertiary and quaternary amines, ammonium cations, sulfonium cations, or phosphonium cations, are prepared and fabricated into membranes that are subsequently imidized and converted into rigid-rod polyimide articles, such as membranes with desirable gas separation properties. A method of enhancing solubility of PAAS polymers in alcohols is also disclosed.

    摘要翻译: 制备由叔胺和季胺,铵阳离子,锍阳离子或鏻阳离子组成的可溶性聚酰胺酸盐(PAAS)前体,并将其制成膜,随后将其酰亚胺化并转化为刚性聚酰亚胺制品,例如具有所需气体的膜 分离性能。 还公开了增加PAAS聚合物在醇中的溶解度的方法。