Wet-process phosphoric acid brightening reagent for aluminum

Adhesive bonding and miscellaneous chemical manufacture – Delaminating processes adapted for specified product – Delaminating in preparation for post processing recycling step

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156665, 252 792, 252 793, 252 794, 252142, B44C 122

Patent

active

045307350

ABSTRACT:
This invention teaches the development of a chemical reagent useful as an aluminum brightening bath. The reagent's composition is primarily wet-process phosphoric acid to which has been added small quantities of nitric acid, copper, and optionally traces of several other substances. The reagent does not require expensive removal of the natural impurities found in wet-process phosphoric acid.

REFERENCES:
patent: 2593448 (1952-04-01), Hesch
patent: 2593449 (1952-04-01), Hesch
patent: 2650157 (1953-08-01), Cochran
patent: 2678875 (1954-05-01), Spooner
patent: 3202612 (1965-08-01), Nelson
Kirk-Othmer, Encyclopedia of Chemical Tech., 3rd ed., vol. 17, pp. 426 et seq.

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