Process for regenerating solder stripping solutions

Details Process for regenerating solder stripping solutions Process for regenerating solder stripping solutions

1986-01-21

1987-06-16

Lindsay, Robert

Compositions

Etching or brightening compositions

Inorganic acid containing

75 77, 75 78, 156642, C09K 1308

Patent

active

046735216

ABSTRACT:
A method for the regeneration of a spent aqueous ammonium bifluoride-hydrogen peroxide solder stripping solution containing contaminant tin ions comprising adding potassium ions to the solution to precipitate a filterable tin-potassium compound.

REFERENCES:
patent: 2494910 (1950-01-01), Spruance
patent: 2614913 (1952-10-01), Reindl et al.
patent: 2827367 (1958-03-01), Cox
patent: 2828193 (1958-03-01), Newman
patent: 3926699 (1975-12-01), Dixon

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