METHOD FOR PURIFYING IMPURE ALUMINIUM OXIDE BY EXTRACTION

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EP 0 796 224 A1

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(43)	Date of publication:
	24.09.1997 Bulletin 1997/39

(21)	Application number: 95918629.0

(22)	Date of filing: 19.05.1995

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International Patent Classification (IPC):

B01J 20/ 08^{( . )}
C01F 7/ 46^{( . )}
C01F 7/ 74^{( . )}

C01B 15/ 023^{( . )}
C01F 7/ 56^{( . )}
C02F 1/ 52^{( . )}

(86)	International application number:
	PCT/FI1995/000272

(87)	International publication number:
	WO 1995/032152 (30.11.1995 Gazette 1995/51)

(84)	Designated Contracting States:
	DE FR GB SE

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Priority:

20.05.1994 FI 19940002338

(71)	Applicant: KEMIRA CHEMICALS OY
	00180 Helsinki (FI)

(72)	Inventor:
	JOKINEN, Simo FIN-90150 Oulu (FI)

(74)	Representative: Svensson, Johan Henrik
	Berggren Oy Ab, P.O. Box 16 00101 Helsinki 00101 Helsinki (FI)

(54)	METHOD FOR PURIFYING IMPURE ALUMINIUM OXIDE BY EXTRACTION