(19)

(11)

EP 1 203 069 A1

(12)

(43) Date of publication: 08.05.2002 Bulletin 2002/19 (21) Application number: 00946163.3 (22) Date of filing: 24.07.2000

(51) International Patent Classification (IPC)7: C11D 17/00, C11D 3/12, C11D 3/22, C11D 17/06, C11D 3/37 (86) International application number: PCT/GB0002/785 (87) International publication number: WO 0111/000 (15.02.2001 Gazette 2001/07)

(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 (30) Priority: 10.08.1999 GB 9918782 (71) Applicant: INEOS Silicas Limited Warrington WA5 1AB (GB)	(72) Inventors: WOODHOUSE, Mark, Antony Warrington,Cheshire WA2 oUJ (GB) FREANEY, Michael, Damian Warrington,Cheshire WA4 2JN (GB) KREISCHER, Pieter, Hubertus 6225 KJ Maastricht (NL) (74) Representative: Jackson, John Derek et al INEOS Silicas LimitedBank Quay Warrington, WA5 1AB Warrington, WA5 1AB (GB)