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(11)

EP 0 649 390 A1

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(43) Date of publication: 26.04.1995 Bulletin 1995/17 (21) Application number: 93915980.0 (22) Date of filing: 21.07.1993

(51) International Patent Classification (IPC):  C02F 11/ 14( . ) C02F 1/ 54( . ) C02F 1/ 52( . ) (86) International application number: PCT/FI1993/000302 (87) International publication number: WO 1994/002424 (03.02.1994 Gazette 1994/04)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 21.07.1992 FI 19920003315 (71) Applicant: KEMIRA OY SF-02271 Espoo (FI)	(72) Inventors: JOKINEN, Simo FIN-90150 Oulu (FI) LAINE, Eija FIN-90630 Oulu (FI) (74) Representative: Weitzel, Wolfgang, Dr.-Ing. Patentanwalt, et al  Friedenstrasse 10 D-89522 Heidenheim D-89522 Heidenheim (DE)