(19)

(11)

EP 1 098 839 A2

(12)

(88) Date of publication A3: 27.04.2000 (43) Date of publication: 16.05.2001 Bulletin 2001/20 (21) Application number: 99929962.1 (22) Date of filing: 29.06.1999

(51) International Patent Classification (IPC)7: C01B 3/38 (86) International application number: PCT/NL9900/398 (87) International publication number: WO 0000/427 (06.01.2000 Gazette 2000/01)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI NL PT SE (30) Priority: 29.06.1998 NL 1009510 (71) Applicant: GASTEC N.V. NL-7327 AC Apeldoorn (NL)	(72) Inventor: GEUS, John, Wilhelm NL-3723 GJ Bilthoven (NL) (74) Representative: Prins, Adrianus Willem  Vereenigde,Nieuwe Parklaan 97 2587 BN Den Haag 2587 BN Den Haag (NL)