Process for regenerating solder stripping solutions
US4673521A · kind A · utility
9Cited by
5References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 21, 1986 |
| Grant date | Jun 16, 1987 |
| Priority date | — |
| Expiry date | Jan 21, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23F1/46
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.