Process for preparing salt-containing solutions

摘要

The description relates to a device for the continuous or intermittent preparation of salt-containing solutions by a combination of ion exchange and electro-dialysis processes in which there is an electrode (1) acting as an anode fitted at one end of the device. Downstream of said electrode there is the anode chamber (5) which is separated from the adjacent concentrate chamber (7) by an ion exchange diaphragm (3). Adjacent thereto is a diluent chamber (8) bounded by two ion exchange diaphragms (3) and (4). In said diluent chamber (8) there are ion exchanger non-woven webs (15) and (16), with (15) being an anion exchanger and (16) a cation exchanger. The arrangement of the chambers (7) and (8) is multiplied as far as the cathode chamber (6) containing the cathode (2). The diluent chambers are fed via a line (10) (inlet) and the diluted solution leaves via the line (12). The concentrate chambers (7) and the electrode chambers (5) and (6) are fed via a line (9) and (13) and the concentrate is taken off via the lines (11) or (14).