(19)

(11)

EP 0 243 350 A1

(12)

(43) Date of publication: 04.11.1987 Bulletin 1987/45 (21) Application number: 85905301.0 (22) Date of filing: 21.10.1985

(51) International Patent Classification (IPC):  B01D 53/ 04( . ) C01B 3/ 50( . ) C01B 3/ 12( . ) C01B 3/ 56( . ) (86) International application number: PCT/US1985/002039 (87) International publication number: WO 1987/002347 (23.04.1987 Gazette 1987/09)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (71) Applicant: UNION CARBIDE CORPORATION Danbury Connecticut 06817 (US)	(72) Inventor: FUDERER, Andrija Palafrugell, Gerona (ES) (74) Representative: Gore, Peter Manson, et al  W.P. THOMPSON & CO. Coopers Building Church Street Liverpool L1 3AB Liverpool L1 3AB (GB)