(19)

(11)

EP 0 491 932 A1

(12)

(43) Date of publication: 01.07.1992 Bulletin 1992/27 (21) Application number: 91913933.0 (22) Date of filing: 26.04.1991

(51) International Patent Classification (IPC):  B01J 27/ 047( . ) C10G 45/ 08( . ) C10G 49/ 12( . ) C10G 45/ 04( . ) C10G 49/ 04( . ) (86) International application number: PCT/US1991/002891 (87) International publication number: WO 1992/000807 (23.01.1992 Gazette 1992/03)

(84) Designated Contracting States: BE DE FR GB IT (30) Priority: 05.07.1990 US 19900548157 21.09.1990 US 19900586622 03.12.1990 US 19900621501 (71) Applicant: CHEVRON RESEARCH COMPANY San Francisco, California 94120-7141 (US)	(72) Inventors: LOPEZ, Jaime Benicia, CA 94510 (US) LESE, Henri, K. San Rafael, CA 94903 (US) SPARS, Byron, G. Mill Valley, CA 94941 (US) ZAKARIAN, John, A. Kensington, CA 94707 (US) SNYDER, Thomas, P. Berkeley, CA 94703 (US) (74) Representative: Deufel, Paul, Dr.  Müller-Boré & Partner Patentanwälte Grafinger Strasse 2 D-81671 München D-81671 München (DE)