Treatment of pulp and paper wastewater with reducing agent and a polymer for color removal
US5326479A · kind A · utility
21Cited by
2References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 1, 1993 |
| Grant date | Jul 5, 1994 |
| Priority date | — |
| Expiry date | Sep 1, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/928
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A process for removing color from a pulp and paper wastewater which comprises the following steps: (a) treating the wastewater with a reducing agent which is capable of inactivating color producing functional groups of the wastewater; and (b) treating the wastewater subsequent to step (a) with a polymer which is capable of removing color from the wastewater.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.