(19)

(11)

EP 0 868 211 A1

(12)

(43) Date of publication: 07.10.1998 Bulletin 1998/41 (21) Application number: 96940063.0 (22) Date of filing: 10.12.1996

(51) International Patent Classification (IPC):  B01F 17/ 00( . ) (86) International application number: PCT/IB1996/001408 (87) International publication number: WO 1997/023281 (03.07.1997 Gazette 1997/29)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 21.12.1995 US 19950576749 (71) Applicant: RHONE-POULENC SURFACTANTS AND SPECIALTIES, L.P. Monmouth Junction, NJ 08852 (US)	(72) Inventors: GAO, Tao Monmouth Junction, NJ 08852 (US) DAHANAYAKE, Manilal, S. Princeton Junction, NJ 08550 (US) TRACY, David, James Plainsboro, NJ 08536 (US) (74) Representative: Cortey, Pierre  Cabinet Hirsch 34, rue de Bassano 75008 Paris 75008 Paris (FR)