Dissolution of metals utilizing an aqueous H.sub.2 SO.sub.4 -H.s

Details Dissolution of metals utilizing an aqueous H.sub.2 SO.sub.4 -H.s Dissolution of metals utilizing an aqueous H.sub.2 SO.sub.4 -H.s

1979-06-25

1980-11-11

Massie, Jerome W.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156664, 252 794, C09K 1306, C23F 100, C23F 302

Patent

active

042331129

ABSTRACT:
Improved metal dissolution rates are obtained when using a solution containing sulfuric acid, hydrogen peroxide and a catalytic amount of a polysulfide compound having the general formula ##STR1## wherein R is a hydroxyl group, a carboxyl group, a sulfonic acid group or a sulfonic acid salt group, each X independently from each other can be hydrogen, hydroxyl or C.sub.1 -C.sub.4 alkyl, each Y independently from each other can be hydrogen, hydroxyl or C.sub.1 -C.sub.4 alkyl, m is an integer from 1 to 18, and n is an integer from 2 to 5.

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