Preparing cellulose ester membranes for gas separation
    5.
    发明授权
    Preparing cellulose ester membranes for gas separation 失效
    制备纤维素酯膜进行气体分离

    公开(公告)号:US5011637A

    公开(公告)日:1991-04-30

    申请号:US301000

    申请日:1989-01-23

    IPC分类号: B01D71/16 C08J3/09 C08J9/28

    摘要: This invention relates to a novel composition useful for preparing a semi-permeable cellulose ester gas separation membrane, which composition includes a mixture of a cellulose ester, a solvent selected from the group consisting essentially of glycerol acetate, glycerol diacetate, glycerol triacetate, and mixtures thereof, and optionally the non-solvent glycerol. This invention also relates to a process of fabricating a cellulose ester gas separation membrane from said composition.

    摘要翻译: 本发明涉及一种可用于制备半透性纤维素酯气体分离膜的新型组合物,该组合物包括纤维素酯,选自基本上由甘油乙酸酯,甘油二乙酸酯,甘油三乙酸酯和混合物 以及任选的非溶剂甘油。 本发明还涉及从所述组合物制备纤维素酯气体分离膜的方法。

    Method for making cellulose semipermeable hollow fibers
    10.
    发明授权
    Method for making cellulose semipermeable hollow fibers 失效
    纤维素半透性中空纤维的制造方法

    公开(公告)号:US4543221A

    公开(公告)日:1985-09-24

    申请号:US313443

    申请日:1981-10-21

    IPC分类号: D01D5/24 D01F1/10 A61M1/03

    CPC分类号: B01D71/10 B01D69/08 D01D5/24

    摘要: Improved cellulose semipermeable hollow fibers useful in detoxifying blood during hemodialysis or hemofiltration treatments. The cellulose fibers are fine, capillary fibers that are made by melt extrusion of certain cellulose ester polyol melt spin compositions into self-supporting gelled fibers. The cellulose ester gelled fibers are subsequently chemically converted into cellulose fibers by deacetylation, in aqueous alkali solution. The product fibers exhibit improved wet intrinsic tensile strength and higher water permeability characteristics than heretofore known cellulose fibers made from cellulose ester spin compositions.The invention includes the method of making the improved fibers and separatory cells such as hemodialyzers or hemofilters which contain the improved fibers in a gamma ray sterilized condition.

    摘要翻译: 改善纤维素半透性中空纤维,用于血液透析或血液滤过治疗中对血液进行解毒。 纤维素纤维是通过将某些纤维素酯多元醇熔融自旋组合物熔融挤出成自支撑胶凝纤维制成的细毛细纤维。 纤维素酯凝胶化纤维随后在碱性水溶液中通过脱乙酰化将其转化成纤维素纤维。 产品纤维表现出比迄今为止已知的由纤维素酯纺丝组合物制成的纤维素纤维更好的湿固有拉伸强度和更高的透水性。 本发明包括在伽马射线灭菌条件下制备改进的纤维和分离细胞如血液透析器或血液滤器的方法,其含有改进的纤维。