Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent
1975-08-01
1976-10-12
Ozaki, G.
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
75118R, 75121, 423 22, 423 24, C22B 1104
Patent
active
039855520
ABSTRACT:
A method of separating gold from palladium or at least one of gold and palladium from solutions containing the chloride complexes of at least the relevant ones of these metals together with other platinum group metals and wherein base metals may be present in the solution said method comprising contacting the solution for a sufficient length of time to result in extracting of substantially all the required gold and for palladium values present therein, with a suitable quantity of a water insoluble non-volatile solvent extractant in an organic phase and having functional groups of the formula R.sup.1 --S--R wherein R.sup.1 and R may be the same or different and have a carbon atom thereof joined directly to the sulphur atom; R.sup.1 and R being chosen so that neither of them have active functional groups capable of acting as ion exchangers or complexing groups and thereafter separating the two phases and recovering the extracted gold and palladium.
REFERENCES:
patent: 3369876 (1968-02-01), Grimm
patent: 3432257 (1969-03-01), Spitzer
patent: 3473921 (1969-10-01), Schmuckler
patent: 3656939 (1972-04-01), Boehm et al.
patent: 3796787 (1974-03-01), Burrows
patent: 3847841 (1974-11-01), Motani et al.
patent: 3892688 (1975-07-01), Motani et al.
National Institute for Metallurgy
Ozaki G.
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