Global patent index - EP 1056685 A4

EP 1056685 A4 2001-04-18 - ELECTROLYTIC CELL WITH POROUS MEMBRANES TO CONCENTRATE ANIONS

Title (en)

ELECTROLYTIC CELL WITH POROUS MEMBRANES TO CONCENTRATE ANIONS

Title (de)

ELEKTROLYTISCHE ZELLE MIT PORÖSER MEMBRAN ZUR AUFKONZENTRIERUNG VON ANIONEN

Title (fr)

CELLULE ELECTROLYTIQUE AVEC MEMBRANES POREUSES PERMETTANT DE CONCENTRER LES ANIONS

Publication

EP 1056685 A4 (EN)

Application

EP 99906974 A

Priority

  • US 9903064 W
  • US 2512098 A

Abstract (en)

[origin: WO9941204A1] The present invention is directed to an apparatus (10) and method for the treatment of water by generating a purifying gas from anions in the water. Preferably, the apparatus (10) and method of the present invention provide for the purification of water by the generation of chlorine at the anode (20) from naturally occurring chloride in the water. The electrolytic cell (10) of the present invention includes a closed electrolytic chamber (12) having a lower inlet opening (14) and an upper outlet opening (16) for directing water to be treated through the chamber. Disposed within the chamber (12) are an anode (20) and a cathode (30) in electrical contact with a conventional direct current power source. Disposed about the anode (20), preferably substantially surrounding the anode (20) and forming the walls of an anode compartment are a plurality of porous membranes (24) disposed so that water must pass sequentially through each membrane before contacting the anode. In the presently preferred embodiment, these porous membranes (24) comprise alternating layers of polypropylene felt and microporous polytetrafluoroethylene film. Most preferably, the cell (10) includes 2-6 sequentially disposed porous membranes (24).

IPC 1-7 (main, further and additional classification)

C02F 1/461; C02F 1/46; C02F 1/467; C02F 1/76

IPC 8 full level (invention and additional information)

C02F 1/461 (2006.01); C02F 1/467 (2006.01); C02F 1/469 (2006.01); C02F 1/76 (2006.01)

CPC (invention and additional information)

C02F 1/4674 (2013.01); C02F 1/46104 (2013.01); C02F 1/469 (2013.01); C02F 1/763 (2013.01); C02F 2001/46133 (2013.01); C02F 2201/46115 (2013.01); C02F 2303/04 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH DE ES FR GB GR IT LI NL PT SE

EPO simple patent family

WO 9941204 A1 19990819; AU 2675699 A 19990830; CA 2323505 A1 19990819; EP 1056685 A1 20001206; EP 1056685 A4 20010418

INPADOC legal status

2002-05-15 [18W] WITHDRAWN

- Ref Legal Event Code: 18W

- Date of withdrawal: 20020319

2001-04-18 [A4] SUPPLEMENTARY SEARCH REPORT

- Ref Legal Event Code: A4

- Effective date: 20010301

2001-04-18 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH DE ES FR GB GR IT LI NL PT SE

2001-04-18 [RIC1] CLASSIFICATION (CORRECTION)

- Ref Legal Event Code: RIC1

- Free Format Text: 7C 02F 1/461 A, 7C 02F 1/467 B, 7C 02F 1/46 B, 7C 02F 1/76 B

2000-12-06 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20000915

2000-12-06 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH DE ES FR GB GR IT LI NL PT SE