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Improvements in or relating to the Manufacture of Membranes

机译:膜制造方面或与之有关的改进

摘要

1,174,137. Membrane for desalination. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. 19 Nov., 1968 [24 Nov., 1967], No. 53565/67. Heading B1X. [Also in Division B5] A cast semi-permeable membrane which may be used for osmotic exchange, reverse osmosis, dialysic and electro-dialysic has a plurality of grooves or ridges upon its rear surface. The grooves define channels for the liquid flow to or from the rear surface of the membrane and the membrane is held on a non-porous backing plate by a positive differential liquid pressure applied to its front surface. In an example a membrane for use in reverse osmosis is prepared by casting a mix of cellulose acetate, formamide and acetone on a grooved plate, immersing in ice water, stripping the membrane from the plate and curing it in water at 75‹C. The membrane is folded upon itself with its rear faces in contact to form a pocket which is sealed at two edges, the grooves being straight and parallel and at an angle of 45‹ to the fold line. The cast membrane is provided with a thin active layer on its front surface. A salt solution is applied under pressure to the front surface, and fresh water escapes from the open edge remote from the fold.
机译:1,174,137。用于淡化的膜。联合王国原子能机构。 1968年11月19日[1967年11月24日],编号53565/67。标题B1X。 [也在B5部分中]可用于渗透交换,反渗透,透析和电渗析的流延半透膜在其后表面上具有多个凹槽或脊。凹槽限定用于液体流入或流出膜的后表面的通道,并且膜通过施加到其前表面的正压差液体而保持在无孔背板上。在一个实例中,通过将乙酸纤维素,甲酰胺和丙酮的混合物浇铸在开槽的板上,浸入冰水中,从板上剥离膜并将其在75℃的水中固化来制备用于反渗透的膜。膜在其自身上以其背面接触的方式折叠以形成口袋,该口袋在两个边缘处被密封,凹槽是笔直且平行的,并且与折叠线成45°角。流延膜在其前表面上设有薄的活性层。在压力下将盐溶液施加到前表面,淡水从远离折痕的开口边缘逸出。

著录项

  • 公开/公告号FR1592836A

    专利类型

  • 公开/公告日1970-05-19

    原文格式PDF

  • 申请/专利权人

    申请/专利号FRD1592836

  • 发明设计人

    申请日1968-11-22

  • 分类号B01D67/00;B29C39/00;B29C44/00;B29D7/01;C25B13/02;C25B13/04;

  • 国家 FR

  • 入库时间 2022-08-23 10:41:09

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