(19)

(11)

EP 0 092 562 A1

(12)

(43) Date of publication: 02.11.1983 Bulletin 1983/44 (21) Application number: 82903251.0 (22) Date of filing: 27.10.1982

(51) International Patent Classification (IPC):  C01F 7/ 60( . ) C01G 23/ 02( . ) C01G 1/ 06( . ) C01G 49/ 06( . ) (86) International application number: PCT/GB1982/000306 (87) International publication number: WO 1983/001612 (11.05.1983 Gazette 1983/11)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 28.10.1981 GB 19810032456 (71) Applicant: MINERAL PROCESS LICENSING CORPORATION BV NL-2514 EH The Hague (NL)	(72) Inventors: WICKENS, Anthony John Surrey (GB) TURNER, John Harry Wallice via Stockport Cheshire (GB) (74) Representative: Kyle, Diana  Elkington and Fife Prospect House 8 Pembroke Road Sevenoaks, Kent TN13 1XR Sevenoaks, Kent TN13 1XR (GB)