Process for producing and purifying metals of the platinum...

Details Process for producing and purifying metals of the platinum... Process for producing and purifying metals of the platinum...

C - Chemistry, Metallurgy

22

B

53/168

C22B 3/34 (2006.01) C01G 55/00 (2006.01) C22B 3/26 (2006.01)

Patent

CA 1230976

ABSTRACT OF THE DISCLOSURE A process for separating and purifying metals of the platinum group from base metals in aqueous acid solutions is des- cribed. For this purpose a substituted thiourea having the gener- al formula R1R2N-CS-NH-COR3: or R1R2N-CS-NH-COOR3 is used as the precipitant N,N-dialkyl-N'-benzoyl thioureas, wherein R1 and R2 represent methyl, n-butyl or n-hexyl groups, are preferably used.

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