公开(公告)号：US3029196A

公开(公告)日：1962-04-10

申请号：US86264259

申请日：1959-12-29

Applicant: REUVEN MATZ ,  CHAIM FORGACS ,  SAMUEL PERLMUTTER

Inventor： REUVEN MATZ ,  CHAIM FORGACS ,  SAMUEL PERLMUTTER

IPC: B01D61/52 ,  C02F1/46 ,  C02F1/469

CPC classification number: B01D65/08 ,  B01D61/52 ,  B01D2321/2083 ,  B01D2321/223 ,  C02F1/4604 ,  C02F1/4693 ,  C02F2201/46115 ,  C02F2201/46125 ,  C02F2201/4613 ,  C02F2201/4615 ,  Y02A20/131 ,  Y02A20/134

Abstract: 900,544. Electro-dialysis of brackish waters. ISRAEL, STATE OF. Dec. 22, 1959 [March 25, 1959], No. 10441/59. Drawings to Specification. Class 41. Brackish water is de-salinated in an electrodialytic cell provided with alternate anionic and cationic permeable membranes to form concentrating cells and diluent cells, in which at short intervals the D.C. is disturbed, e.g. by imposing A.C. or by interrupting the D.C. during which time a reversed D.C. may also be applied, whereby the applied voltage falls to zero, or becomes negative. Preferably, the time interval of direct flow to interrupted flow is about 4:1. It is stated that deposits of hard scale on the membranes are thereby prevented. Electrical circuits for generating the required D.C. and A.C. are illustrated.