Method for dissolving non-ferrous metals

Details Method for dissolving non-ferrous metals Method for dissolving non-ferrous metals

1975-03-31

1976-08-24

Bashore, S. Leon

Cleaning and liquid contact with solids

Processes

For metallic, siliceous, or calcareous basework, including...

156 18, 423 32, 423 33, B08B 308

Patent

active

039765008

ABSTRACT:
Non-cyanide alkaline aqueous solutions for stripping non-ferrous metals, especially copper, from ferrous metal such as, for example, steel. The stripper solution comprises a water-soluble nitrate, a water-soluble compound of the formula ##EQU1## wherein R represents a valence bond, --CH.sub.2).sub.x wherein x is an integer of 1 to 2, ##EQU2## WHEREIN Y IS AN INTEGER OF 1 TO 2, OR ##EQU3## and M is a compatible, hydrophilic, i.e. water-loving or water-solubilizing, cation, a water-soluble persulfate, a water-soluble urea compound, and ammonium hydroxide. Brass, cadmium and zinc can also be stripped from steel by the stripper or dissolving solutions herein.

REFERENCES:
patent: 3351556 (1967-11-01), Tsourmas
patent: 3738867 (1973-06-01), Franz

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