(19)

(11)

EP 0 793 636 A1

(12)

(43) Date of publication: 10.09.1997 Bulletin 1997/37 (21) Application number: 95937211.0 (22) Date of filing: 20.11.1995

(51) International Patent Classification (IPC):  B01J 31/ 18( . ) C07C 45/ 50( . ) C07F 9/ 24( . ) C07F 9/ 6574( . ) C07B 61/ 00( . ) C07C 47/ 20( . ) C07F 9/ 6571( . ) C07F 9/ 6584( . ) (86) International application number: PCT/NL1995/000393 (87) International publication number: WO 1996/016923 (06.06.1996 Gazette 1996/26)

(84) Designated Contracting States: BE DE ES FR GB IT NL (30) Priority: 25.11.1994 EP 19940203434 (71) Applicants: DSM N.V. 6411 TE Heerlen (NL) E.I. DU PONT DE NEMOURS AND COMPANY Wilmington Delaware 19898 (US)

(72) Inventors: WISSING, Elmo NL-3732 CA De Bilt (NL) TEUNISSEN, Antonius, Jacobus, Josephus, Maria NL-6165 XM Geleen (NL) HANSEN, Carolina, Bernedette NL-6136 BT Sittard (NL) VAN LEEUWEN, Petrus, Wilhelmus, Nicolaas, Maria NL-3628 CA Kockengen (NL) VAN ROOY, Annemiek NL-1111 GS Diemen (NL) BURGERS, Dennis NL-1013 LM Amsterdam (NL) (74) Representative: Cramwinckel, Michiel, et al  DSM N.V., Octrooibureau DSM, P.O. Box 9 6160 MA Geleen 6160 MA Geleen (NL)