(19)

(11)

EP 0 047 773 A1

(12)

(43) Date of publication: 24.03.1982 Bulletin 1982/12 (21) Application number: 81900798.0 (22) Date of filing: 11.03.1981

(51) International Patent Classification (IPC):  B01D 21/ 00( . ) C02F 1/ 48( . ) (86) International application number: PCT/US1981/000304 (87) International publication number: WO 1981/002529 (17.09.1981 Gazette 1981/22)

(84) Designated Contracting States: FR (30) Priority: 12.03.1980 US 19800129561 (71) Applicant: WHITE LIGHT INDUSTRIES, INC. Santa Barbara, CA 93108 (US)	(72) Inventor: DE PALMA, Bruce E. Santa Barbara, CA 93108 (US)