(19)

(11)

EP 0 751 821 A1

(12)

(43) Date of publication: 08.01.1997 Bulletin 1997/02 (21) Application number: 95912963.0 (22) Date of filing: 21.03.1995

(51) International Patent Classification (IPC):  B01J 2/ 00( . ) C22B 1/ 10( . ) C22B 1/ 00( . ) C22B 1/ 16( . ) (86) International application number: PCT/AU1995/000156 (87) International publication number: WO 1995/025585 (28.09.1995 Gazette 1995/41)

(84) Designated Contracting States: BE DE ES FR IT NL SE (30) Priority: 21.03.1994 AU 1994PM04609 (71) Applicants: TECHNOLOGICAL RESOURCES PTY. LTD. Melbourne, VIC 3000 (AU) PASMINCO LIMITED Melbourne, VIC 3000 (AU)	(72) Inventors: MCCARTHY, David, John Glen Waverley, VIC 3150 (AU) TAKOS, John Carnegie, VIC 3163 (AU) BOX, Terence Toorak, VIC 3142 (AU) BROWN, Peter, John Tighes Hill, NSW 2297 (AU) (74) Representative: Kador & Partner  Corneliusstrasse 15 80469 München 80469 München (DE)