Recovery of gold from bromide etchants

Details Recovery of gold from bromide etchants Recovery of gold from bromide etchants

1980-08-14

1983-03-08

Hearn, Brian E.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75118R, 75 97A, 75102, 75108, 156625, 156664, 252 791, 134 13, C22B 1104, B44C 122

Patent

active

043759840

ABSTRACT:
Gold, as well as other metals such as copper, titanium, and nickel, are etched from substrates by alkali metal iodide and bromide solutions also containing iodine and bromine, respectively. The dissolved gold is recovered as metallic gold either by precipitating it using an alkali metal hydroxide or by a decomposition technique in which the etchant solution is driven off. A method is also taught to regenerate alkali metal iodide-iodine etchant solution.

REFERENCES:
patent: 2283198 (1942-05-01), Fink
patent: 2304823 (1942-12-01), Harrison
patent: 3495976 (1970-02-01), Bazilevsky et al.
patent: 3625674 (1971-12-01), Jacobs
patent: 3709681 (1973-01-01), Wilson
patent: 3957505 (1976-05-01), Homick et al.
patent: 4190489 (1980-02-01), Bahl et al.
patent: 4260451 (1981-04-01), Schmeckenbecher
patent: 4319922 (1982-03-01), MacDonald
patent: 4319923 (1982-03-01), Falanga
Wise, Editor, Gold, D. Van Nostrand Co., Inc., Princeton, N.J., (1964), pp. 44-50, 323-325.
Flitsch, R., "Etch for Removing Gold", IBM Technical Disclosure Bulletin, vol. 10, No. 4, Sep. 1967, p. 355.
Interrante, M., "Reworking Multilayer Ceramic Metal Layers", IBM Technical Disclosure Bulletin, vol. 18, No. 2, Jul. 1975, p. 413.

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