Recovery of rhodium

Details Recovery of rhodium Recovery of rhodium

1991-11-18

1993-04-13

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

423 22, C22B 1104

Patent

active

052019420

ABSTRACT:
Rhodium is recovered from an aqueous precious metal solution by first contacting the solution with stannous chloride at a Sn:Rh molar ratio of at least 2:1 to produce activated Rh solution; solvent extracting rhodium from the activated solution with an organic extractant to produce an organic phase containing Rh; the Rh can be recovered from the organic phases by burning-off the organic, precipitating Rh by reduction or stripping with a stripping agent and recovering Rh from an Rh-loaded stripping agent; the method produces high yields of Rh in short periods as compared with time consuming prior procedures.

REFERENCES:
patent: 4077800 (1978-03-01), Peka
patent: 4155750 (1979-05-01), Edwards
patent: 4364907 (1982-12-01), Barnes
patent: 4668289 (1987-05-01), Langer
patent: 4945075 (1990-07-01), Cushman

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