(19)

(11)

EP 0 081 490 A1

(12)

(43) Date of publication: 22.06.1983 Bulletin 1983/25 (21) Application number: 81902091.0 (22) Date of filing: 19.06.1981

(51) International Patent Classification (IPC):  B01D 3/ 06( . ) C02F 1/ 06( . ) (86) International application number: PCT/US1981/000851 (87) International publication number: WO 1982/004403 (23.12.1982 Gazette 1982/30)

(84) Designated Contracting States: AT DE FR GB NL SE (71) Applicant: WESTINGHOUSE ELECTRIC CORPORATION Pittsburgh Pennsylvania 15222 (US)	(72) Inventors: MOEN, David L. Glen Mills, PA 19342 (US) PETERSON, Ray D. Media, PA 19063 (US) (74) Representative: Holzer, Rupprecht, Dipl.-Ing.  Ludwigstrasse 26 D-8900 Augsburg D-8900 Augsburg (DE)