(19)

(11)

EP 0 862 605 A1

(12)

(43) Date of publication: 09.09.1998 Bulletin 1998/37 (21) Application number: 96933531.0 (22) Date of filing: 10.10.1996

(51) International Patent Classification (IPC):  C10L 5/ 14( . ) (86) International application number: PCT/GB1996/002479 (87) International publication number: WO 1997/013827 (17.04.1997 Gazette 1997/17)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 11.10.1995 GB 19950020818 (71) Applicants: ASHLAND INC. Columbus, OH 43216 (US) Ashland UK Ltd. Kidderminster, Worcestershire DY11 7QP (GB)	(72) Inventor: YATES, Raymond Worcestershire DY11 7QP (GB) (74) Representative: Rackham, Anthony Charles  Lloyd Wise, Tregear & Co., Commonwealth House, 1-19 New Oxford Street London WC1A 1LW London WC1A 1LW (GB)