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公开(公告)号：EP0669898B1
公开(公告)日：1998-02-25
申请号：EP94903123.1
申请日：1993-11-19
CPC分类号： C02F5/02 , B01D61/147 , B01D61/16 , B01D2311/04 , C02F1/5236
摘要： In order to remove a constituent from a solution, said solution, a particulate seed material and one or more substances which cause the constituent to be removed to crystallize out on the seed material, are brought together and the seed material having the substance crystallized out thereon is separated. The particles of the seed material have a size between 0.1 and 50 mu m and the mixture of liquid and seed material having substance crystallized out thereon is passed through a membrane filter for microfiltration. The pores of said filter are of such a size that the liquid can penetrate through the membrane, and the seed composition material cannot penetrate through the membrane. The method can be used, inter alia, for softening water, purifying waste water, removing heavy-metal ions, removing anions and preparing ultra-pure products from aqueous solutions or organic mixtures.
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2.发明公开
公开(公告)号：EP0669898A1
公开(公告)日：1995-09-06
申请号：EP94903123.0
申请日：1993-11-19
CPC分类号： C02F5/02 , B01D61/147 , B01D61/16 , B01D2311/04 , C02F1/5236
摘要： In order to remove a constituent from a solution, said solution, a particulate seed material and one or more substances which cause the constituent to be removed to crystallize out on the seed material, are brought together and the seed material having the substance crystallized out thereon is separated. The particles of the seed material have a size between 0.1 and 50 νm and the mixture of liquid and seed material having substance crystallized out thereon is passed through a membrane filter for microfiltration. The pores of said filter are of such a size that the liquid can penetrate through the membrane, and the seed composition material cannot penetrate through the membrane. The method can be used, inter alia, for softening water, purifying waste water, removing heavy-metal ions, removing anions and preparing ultra-pure products from aqueous solutions or organic mixtures.
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