(19)

(11)

EP 0 859 744 A1

(12)

(43) Date of publication: 26.08.1998 Bulletin 1998/35 (21) Application number: 96937034.0 (22) Date of filing: 29.10.1996

(51) International Patent Classification (IPC):  C01F 7/ 06( . ) (86) International application number: PCT/US1996/017247 (87) International publication number: WO 1997/017292 (15.05.1997 Gazette 1997/21)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 07.11.1995 US 19950000630P (71) Applicant: Cytec Technology Corp. Wilmington, Delaware 19801 (US)	(72) Inventors: FLIEG, Greg Prairieville, LA 70769 (US) COLE, Robert, W. Portland, TX 78374 (US) THOMASON, Ronald Victoria, TX 77904 (US) BAIR, Patrick Glen Rose, TX 76043 (US) (74) Representative: Allam, Peter Clerk, et al  LLOYD WISE, TREGEAR & CO., Commonwealth House, 1-19 New Oxford Street London WC1A 1LW London WC1A 1LW (GB)