Method of regenerating permanganate etch bath

Details Method of regenerating permanganate etch bath Method of regenerating permanganate etch bath

1986-06-27

1987-10-06

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

134 10, 156626, 156644, 156655, 156656, 156666, 156668, 156902, 252 795, B44C 122, B29C 3700, C23F 100, C03C 1500

Patent

active

046981241

ABSTRACT:
A method is provided for regenerating the spent permanganate ions in an alkaline permanganate-containing etchant composition by adding to the composition an oxidizer selected from the group consisting of an inorganic bromate, hypochlorite, chlorite, chlorate, peroxydisulfate, monopersulfate and mixtures thereof.

REFERENCES:
patent: 4592852 (1986-06-01), Courduvelis et al.
patent: 4629636 (1986-12-01), Courduvelis et al.
Latimer, W. M., The Oxidation States of the Elements and Their Potentials in Aqueous Solutions, 2nd Ed., 1961, pp. 78, 79 and 340-348.
Cotton and Wilkinson, Advanced Inorganic Chemistry--A Comprehensive Text, 1962, pp. 428 and 429.

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