Method for producing alkali metal gold sulfite

Details Method for producing alkali metal gold sulfite Method for producing alkali metal gold sulfite

1975-06-17

1976-06-29

Thomas, Earl C.

Chemistry of inorganic compounds

With additive

423512A, 204 46G, C01B 1762, C01G 700

Patent

active

039668800

ABSTRACT:
A process for making high purity alkali produced is sulfite substantially free from chloride ions includes the step of admixing gold chloride solution with magnesium oxide at an alkaline pH to form magnesium aurate which is recoverable as a coating upon the magnesium oxide precipitate. The magnesium aurate is thereafter admixed with a solution of alkali metal sulfite at an alkaline pH to produce alkali metal gold sulfite and a precipitate of magnexium oxide.
When the alkali metal gold sulfite being produces ia a potassium gold sulfite, the process desirably includes the step of admixing the potassium gold sulfite with a sulfamic acid compound to provide stability. The magnesium aurate precipitate is desirably rinsed to remove chloride ion contamination.

REFERENCES:
patent: 3057789 (1962-10-01), Smith
Sheed et al.,"Comprehensive Inorganic Chemistry," D. Van Nostrand Company, Inc., vol. 2, 1954, pp. 232 + 233.

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