公开(公告)号：US09737854B2

公开(公告)日：2017-08-22

申请号：US14760273

申请日：2014-12-16

申请人： Merck Patent GmbH

发明人： Uwe Kaetzel

IPC分类号： B01D61/44 ,  C09K19/00 ,  C09K19/02 ,  C09K19/06 ,  C09K19/54 ,  C09K19/04 ,  C09K19/30

CPC分类号： B01D61/44 ,  C09K19/00 ,  C09K19/02 ,  C09K19/062 ,  C09K19/3003 ,  C09K19/3066 ,  C09K19/54 ,  C09K2019/0448 ,  C09K2019/0466 ,  C09K2019/3004 ,  C09K2019/3006 ,  C09K2019/3009 ,  C09K2019/301 ,  C09K2019/3027 ,  C09K2219/00

摘要： In a process for the purification of a liquid-crystal mixture (7), the liquid-crystal mixture (7) is passed through a first electrodialysis cell (2) and a concentrate solution (14) is passed through a second electrodialysis cell (8) which is adjacent to the first electrodialysis cell (2) and is separated by an ion-exchanger membrane (9), and an electric field transverse to a direction of passage of the liquid-crystal mixture (7) through the first electrodialysis cell (2) is generated with the aid of an anode/cathode arrangement (15, 16) arranged outside the electrodialysis cells (2, 8) so that ionized constituents of the liquid-crystal mixture (7) are discharged at the ion-exchanger membrane (9) and removed from the liquid-crystal mixture (7).