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1. 发明申请

WO1993012868A1 SPINNING OF ASYMMETRIC HOLLOW FIBRE MEMBRANES WHICH HAVE A DENSE, NON-POROUS TOP LAYER AND A POROUS UNDER LAYER OR HAVE BOTH A POROUS TOP LAYER AND A POROUS UNDER LAYER 审中-公开
标题翻译：旋转不对称的中空纤维膜，其具有渗透性，非多孔顶层和多层多层，或多层顶层和多层下层
公开(公告)号：WO1993012868A1
公开(公告)日：1993-07-08
申请号：PCT/NL1992000233
申请日：1992-12-18
申请人： DELAIR DROOGTECHNIEK EN LUCHTBEHANDELING B.V. , KOOPS, Geert, Hendrik , LI, Shuguong , MULDER, Marcellinus, Hendrikus, Vincentius , VAN DEN BOOMGAARD, Anthonie , SMOLDERS, Cornelis, Antonius
发明人： DELAIR DROOGTECHNIEK EN LUCHTBEHANDELING B.V.
IPC分类号： B01D69/08
CPC分类号： D01D5/247 , B01D69/08 , D01D5/24
摘要： The invention relates, on the one hand, to a method for the production of hollow fibre membranes, which are suitable, for example, for gas separation and have a dense, non-porous top layer and a porous under layer, with the aid of a one-step process using a spinning head which has three concentrically arranged outlet openings, either a non-solvent for the relevant polymer, which instantaneously demixes the polymer solution, or a mixture of such a non-solvent and a solvent for the polymer, which mixture, depending on the solvent content, imparts to the polymer solution a behaviour which ranges from instantaneous demixing behaviour to delayed demixing behaviour, being fed through the innermost opening; a polymer solution being fed through the intermediate opening and a non-solvent which gives "delayed" demixing of the polymer solution being fed through the outermost opening, after which the three streams are directed together into a coagulation bath which contains a precipitation medium which instantly demixes the polymer solution, after which the resulting membrane is obtained. On the other hand, the invention relates to a method for the production, in the abovementioned manner, of hollow fibre membranes which are suitable, for example, for ultrafiltration and have both a porous top layer and a porous under layer, with which method - in contrast to the abovementioned method - a non-solvent which produces "instantaneous" demixing of the polymer solution is fed through the outermost opening.
摘要翻译：本发明一方面涉及生产中空纤维膜的方法，该方法适用于例如气体分离并具有致密，无孔的顶层和多孔下层，借助于使用具有三个同心布置的出口开口的旋转头的一步法，用于相关聚合物的非溶剂，其将聚合物溶液瞬时分层，或用于聚合物的这种非溶剂和溶剂的混合物，根据溶剂含量，该混合物赋予聚合物溶液从瞬间分层行为到延迟分层行为的行为，通过最内部的开口进给; 通过中间开口进料的聚合物溶液和非溶剂，使得通过最外面的开口进料的聚合物溶液“延迟”分流，之后将三个流引导到凝结浴中，该凝结浴含有立即的沉淀介质对聚合物溶液进行表征，之后得到所得到的膜。另一方面，本发明涉及以上述方式制造适用于例如超滤并具有多孔顶层和多孔底层的中空纤维膜的方法，与上述方法相反，通过最外面的开口进料产生“瞬时”分解聚合物溶液的非溶剂。

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