(19)

(11)

EP 0 862 491 A1

(12)

(43) Date of publication: 09.09.1998 Bulletin 1998/37 (21) Application number: 97929539.0 (22) Date of filing: 07.07.1997

(51) International Patent Classification (IPC):  B01D 69/ 10( . ) (86) International application number: PCT/JP1997/002340 (87) International publication number: WO 1998/001219 (15.01.1998 Gazette 1998/02)

(84) Designated Contracting States: AT BE CH DE ES FR GB IT LI NL SE (30) Priority: 09.07.1996 JP 19960179081 29.08.1996 JP 19960228365 (71) Applicant: TEIJIN LIMITED Osaka-shi, Osaka 541 (JP)	(72) Inventors: FUJITA, Masakazu, Teijin Limited Tokyo 100 (JP) KUDO, Takashi, Teijin Limited Tokyo 100 (JP) MURAKAMI, Shoichi, Teijin Limited Tokyo 100 (JP) (74) Representative: Votier, Sidney David, et al  CARPMAELS & RANSFORD 43, Bloomsbury Square London WC1A 2RA London WC1A 2RA (GB)