(19)

(11)

EP 1 144 550 A1

(12)

(43) Date of publication: 17.10.2001 Bulletin 2001/42 (21) Application number: 98962992.8 (22) Date of filing: 09.12.1998

(51) International Patent Classification (IPC)7: C10G 61/02 (86) International application number: PCT/US9826/134 (87) International publication number: WO 0034/417 (15.06.2000 Gazette 2000/24)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE Designated Extension States: AL LT LV MK RO SI (71) Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY LP Houston, TX 77010 (US)	(72) Inventor: WITTE, David, H. Humble, TX 77345 (US) (74) Representative: Ebner von Eschenbach, Jennifer et al Ladas & Parry,Dachauerstrasse 37 80335 München 80335 München (DE)