Paper-pulp deinking method and equipment to implement this method
US5979665A · kind A · utility
2Cited by
12References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 22, 1997 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | May 22, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/64
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Equipment for deinking paper pulp, wherein the batch of pulp to be deinked is made to circulate to move from top to bottom whereas the air bubbles are introduced at least in the lower part and move from bottom to top, characterized in that the pulp descends from top to bottom while being recycled in several consecutive and superposed stages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.