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公开(公告)号:US3980754A
公开(公告)日:1976-09-14
申请号:US603107
申请日:1975-08-08
CPC分类号: C01D7/26 , Y02P20/142
摘要: An alkali carbonate containing a fluorine compound is purified by dissolving the crude alkali carbonate in an aqueous solution or suspension of magnesium bicarbonate in order to transfer the fluorine impurity into the resulting colloidal flocculated precipitate whereby the fluorine is substantially separated from the aqueous solution of the alkali carbonate.
摘要翻译: 将含有氟化合物的碱金属碳酸盐通过将粗碱金属碳酸盐溶解在碳酸氢镁的水溶液或悬浮液中来纯化,以便将氟杂质转移到所得的胶体絮凝沉淀物中,由此氟基本上与碱的水溶液分离 碳酸盐。
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2.
公开(公告)号:US4537910A
公开(公告)日:1985-08-27
申请号:US550338
申请日:1983-11-09
申请人: Michiharu Oogai , Toru Seita , Kosuke Takeshige , Hideo Shuyama
发明人: Michiharu Oogai , Toru Seita , Kosuke Takeshige , Hideo Shuyama
IPC分类号: C08J5/22
CPC分类号: C08J5/2231 , C08J2327/18
摘要: A method of producing a cation-exchange membrane having roughed surface which is characterized in mixing silica powder with water to give a suspended or pasty mixture, supporting the resultant mixture on art paper or filter paper, drying the mixture to form silica powder layer, adhering with heating and pressing the silica powder layer on surface of membrane composed of perfluorocarbon polymer, and removing the silica powder layer formed on the surface of said membrane with caustic alkali aqueous solution.
摘要翻译: 一种生产具有粗糙表面的阳离子交换膜的方法,其特征在于将二氧化硅粉末与水混合以得到悬浮或糊状混合物,将所得混合物支撑在艺术纸或滤纸上,干燥混合物以形成二氧化硅粉末层,粘附 通过在由全氟化碳聚合物构成的膜的表面上加热压制二氧化硅粉末层,并用苛性碱水溶液除去形成在所述膜表面上的二氧化硅粉末层。
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