Evaporative treatment of inorganic saponifier wash water
US5348588A · kind A · utility
31Cited by
8References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 30, 1993 |
| Grant date | Sep 20, 1994 |
| Priority date | — |
| Expiry date | Sep 30, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K3/26
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The aqueous effluent from the wash cycle of a process for cleaning electronic circuit assemblies of rosin flux and other organic residues with an aqueous alkaline cleaning solution comprises evaporating the effluent to cause separation of an aqueous vapor phase and a solid phase comprising residues of the rosin flux and residues of the cleaning solution including alkaline salts such as alkali metal carbonates and bicarbonates and organic adjuvants such as surfactants which do not vaporize.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.