Process for electrolytically purifying a photographic developer waste solution
US4046655A · kind A · utility
7Cited by
11References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 18, 1975 |
| Grant date | Sep 6, 1977 |
| Priority date | — |
| Expiry date | Feb 18, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2103/40
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A photographic developer waste solution is electrolytically purified by adding to said waste solution chloride ion and bromide ion; or chloride ion, bromide ion and iodide or iodate ion under limited pH, temperature, anode current density and current concentration conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.