公开(公告)号：DE3544549A1

公开(公告)日：1986-07-10

申请号：DE3544549

申请日：1985-12-17

Applicant: BASF AG

Inventor： COLBERG HORST DR ,  HERRMANN MANFRED DR ,  MAYER UDO DR ,  PUETTER HERMANN DR ,  ROSKE ECKHARD

IPC: C09B67/54 ,  B01D13/02 ,  C09B62/04

Abstract: The invention relates to a process for the preparation of largely salt-free aqueous solutions of ionic dyestuffs by electrodialysis, which is characterised in that the flow rate of diluate (= solution to be treated) is chosen to be less than that of the concentrate.

公开(公告)号：DE3314817A1

公开(公告)日：1984-10-25

申请号：DE3314817

申请日：1983-04-23

Applicant: BASF AG

Inventor： PUETTER HERMANN DR ,  NAARMANN HERBERT DR ,  PENZIEN KLAUS DR

IPC: H01M8/18 ,  B01D57/02 ,  B01D61/44 ,  B01D61/48 ,  B01D69/02 ,  B01D71/58 ,  B01J47/12 ,  C02F1/42 ,  C08J5/22 ,  C08L45/00 ,  C25B13/08 ,  G01N27/416 ,  H01M2/16 ,  H01M8/02 ,  H01M10/36 ,  B01D13/02 ,  B01D13/04 ,  C02F1/46 ,  H01M4/60 ,  G01N27/56

Abstract: Electrochemical processes for selectively separating ions in aqueous soltuion are carried out using apparatuses in which two or more different spaces are separated by means of ion exchange membranes, and the membrane material consists of electrochemically prepared pyrrole polymers. Such ion exchange membranes are used as proton and anion exchange membranes.