(19)

(11)

EP 0 935 498 A1

(12)

(43) Date of publication: 18.08.1999 Bulletin 1999/33 (21) Application number: 95924763.0 (22) Date of filing: 05.07.1995

(51) International Patent Classification (IPC):  B01D 53/ 86( . ) B01J 29/ 072( . ) B01J 37/ 02( . ) B01D 53/ 94( . ) B01J 29/ 46( . ) F01N 3/ 20( . ) (86) International application number: PCT/US1995/008253 (87) International publication number: WO 1996/001689 (25.01.1996 Gazette 1996/05)

(84) Designated Contracting States: BE DE FR GB IT NL (30) Priority: 07.07.1994 US 19940271685 07.07.1994 US 19940271686 07.07.1994 US 19940271692 07.07.1994 US 19940271693 07.07.1994 US 19940271694 08.11.1994 US 19940335617 (71) Applicant: MOBIL OIL CORPORATION Fairfax, Virginia 22037-0001 (US)

(72) Inventors: AUDEH, Costandi, Amin Sun City West, AZ 85375-4969 (US) DEGNAN, Thomas, Francis Morrestown, NJ 08057-2109 (US) FARNOS, Maria, Dolores Wilmington, DE 08066 (US) HATZIKOS, George, Harry West Deptford, NJ 08051-2047 (US) MCWILLIAMS, John, Paul Woodbury, NJ 08096-2107 (US) SHARMA, Sanjay, Bhardwaj Princeton, NJ 08540 (US) SHIHABI, David, Said Pennington, NJ 08534-3708 (US) SOCHA, Richard, Francis Newton, PA 18940-9207 (US) STEVENSON, Scott, Andrew Langhorne, PA 19053-1556 (US) TIMKEN, Hye, Kyung, Cho Woodbury, NJ 08096-1506 (US) VARTULI, James, Clarke West Chester, PA 19380-5848 (US) (74) Representative: Cooper, John Anthony  Kador & Partner, 99 Warwick Way London SW1V 1QL London SW1V 1QL (DE)