Process for preparing halide-free rhodium nitrate

Details Process for preparing halide-free rhodium nitrate Process for preparing halide-free rhodium nitrate

1990-07-20

1991-01-08

Langel, Wayne A.

Chemistry of inorganic compounds

Nitrogen or compound thereof

Oxygen containing

423472, 423491, C01G 5500

Patent

active

049833723

ABSTRACT:
Halide-free rhodium nitrate is produced by a process which comprises quantitative reaction of metallic rhodium with hydrochloric acid, gaseous chloride and gaseous hydrogen chloride to produce hexachlororhodic acid, followed by the quantitative reaction of this acid with potassium iodide to produce rhodium iodide. The resulting rhodium iodide is quantitatively converted to halide-free rhodium nitrate by reacting with nitric acid and hydrogen peroxide.

REFERENCES:
patent: 4844879 (1989-07-01), Yamazaki
patent: 4859445 (1989-08-01), Hirose
Chemical Abstracts 111 (4) 25831v (1990).

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