Use of substances giving off oxygen in reduction of dark coloring of pulp
US4532007A · kind A · utility
4Cited by
4References
3Claims
0Family size
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Key dates
| Filing date | May 20, 1983 |
| Grant date | Jul 30, 1985 |
| Priority date | — |
| Expiry date | May 20, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/928
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Use of oxygen, oxygen containing gases or substances giving off oxygen in reduction or inhibition of the dark coloring of pulp or paper in white water systems, especially closed ones, in production of pulp and paper, these substances being added to the white water system in such an amount that aerobic conditions are maintained substantially permanently in at least a part of the white water system, i.e. the redox potential is higher than -100 mV.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.