(19)

(11)

EP 0 929 585 A1

(12)

(43) Date of publication: 21.07.1999 Bulletin 1999/29 (21) Application number: 97941101.0 (22) Date of filing: 19.09.1997

(51) International Patent Classification (IPC):  B01J 31/ 22( . ) C08G 18/ 22( . ) C08G 18/ 16( . ) (86) International application number: PCT/GB1997/002565 (87) International publication number: WO 1998/015585 (16.04.1998 Gazette 1998/15)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU NL PT SE Designated Extension States: RO SI (30) Priority: 05.10.1996 GB 19960020808 30.01.1997 GB 19970001911 (71) Applicant: TIOXIDE SPECIALTIES LIMITED London W14 0QL (GB)	(72) Inventors: SKINNER, Christopher John Durham DH1 5NN (GB) RIDLAND, John Durham DH1 5GL (GB) (74) Representative: Jackson, John Derek  Tioxide Specialties Limited, Lincoln House, 137-143 Hammersmith Road London, W14 0QL London, W14 0QL (GB)