(19)

(11)

EP 0 970 196 A1

(12)

(43) Date of publication: 12.01.2000 Bulletin 2000/02 (21) Application number: 98909430.5 (22) Date of filing: 10.02.1998

(51) International Patent Classification (IPC)7: C12N 11/02, C12N 11/14, C12M 1/40, B01D 71/00 (86) International application number: PCT/EP9800/726 (87) International publication number: WO 9836/058 (20.08.1998 Gazette 1998/33)

(84) Designated Contracting States: DE ES FR GB IT NL (30) Priority: 14.02.1997 EP 97200424 (71) Applicant: UNICHEMA CHEMIE B.V. 2802 BE Gouda (NL)	(72) Inventors: VAN GEMERT, Robert, Wilhelm NL-6836 SN Arnhem (NL) CUPERUS, Folkert, Petrus NL-7951 MC Staphorst (NL) (74) Representative: Roberts, Jonathan Winstanley  ICI Group Intellectual PropertyPO Box 90Wilton MiddlesbroughCleveland TS90 8JE MiddlesbroughCleveland TS90 8JE (GB)