(19)

(11)

EP 1 071 690 A1

(12)

(43) Date of publication: 31.01.2001 Bulletin 2001/05 (21) Application number: 99911388.9 (22) Date of filing: 11.03.1999

(51) International Patent Classification (IPC)7: C07F 17/00 (86) International application number: PCT/US9905/539 (87) International publication number: WO 9952/919 (21.10.1999 Gazette 1999/42)

(84) Designated Contracting States: BE DE ES FR GB IT NL (30) Priority: 16.04.1998 US 61636 (71) Applicant: ALBEMARLE CORPORATION Baton Rouge, LA 70801-1765 (US)	(72) Inventors: LEE, John, Y. Baton Rouge, LA 70808 (US) LAMBERT, Jules, A. Denham Springs, LA 70706 (US) HAMLIN, Joseph, L. Ville Platte, LA 70586 (US) JONES, Karl, R. Baton Rouge, LA 70815 (US) (74) Representative: UEXKÜLL & STOLBERG  PatentanwälteBeselerstrasse 4 22607 Hamburg 22607 Hamburg (DE)