(19)

(11)

EP 0 220 283 A1

(12)

(43) Date of publication: 06.05.1987 Bulletin 1987/19 (21) Application number: 86903060.0 (22) Date of filing: 23.04.1986

(51) International Patent Classification (IPC):  C01B 21/ 072( . ) (86) International application number: PCT/US1986/000911 (87) International publication number: WO 1986/006360 (06.11.1986 Gazette 1986/24)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 29.04.1985 US 19850727993 (71) Applicant: BATTELLE DEVELOPMENT CORPORATION Columbus Ohio 43201 (US)	(72) Inventor: SEKERCIOGLU, Ibrahim Muskegon, MI 49441 (US)