Process for the recovery of tin

Details Process for the recovery of tin Process for the recovery of tin

1986-10-17

1988-04-12

Sneed, Helen M. S.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group iva metal

423 90, 204121, 75 1R, 75101R, 23305R, C25F 700

Patent

active

047373512

ABSTRACT:
A process is described for recovering tin from oxide or oxide/sulphide low-grade starting materials and concentrates containing little or relatively low concentrations of tin, in which such low-grade starting materials are mixed with KOH and decomposed at high temperatures. The decomposed substance is then leached with water, and metallic tin is separated out electrolytically in one or more stages from the lye. The electrolyte with reduced tin content is concentrated by evaporation, impurities being removed, and dehydrated. The potassium hydroxide solution recovered is re-used for decomposition.

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