(19)

(11)

EP 1 322 737 A2

(12)

(88) Date of publication A3: 11.07.2002 (43) Date of publication: 02.07.2003 Bulletin 2003/27 (21) Application number: 01971233.0 (22) Date of filing: 19.09.2001

(51) International Patent Classification (IPC)7: C11D 1/22, C11D 17/00 (86) International application number: PCT/US0129/396 (87) International publication number: WO 0202/4845 (28.03.2002 Gazette 2002/12)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 19.09.2000 US 665642 (71) Applicant: HUNTSMAN PETROCHEMICAL CORPORATION Austin,Texas 78752 (US)	(72) Inventors: SMITH, George, A. Austin, TX 78732 (US) ANANTANENI, Prakasa, R. Austin, TX 78729 (US) ASHRAWI, Samir, S. Austin, TX 78729 (US) SMADI, Raeda, M. Austin, TX 78717 (US) (74) Representative: Winkler, Andreas, Dr.  FORRESTER & BOEHMERTPettenkoferstrasse 20-22 80336 München 80336 München (DE)