Process for treating paper pulp
US6162325A · kind A · utility
5Cited by
14References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 16, 1997 |
| Grant date | Dec 19, 2000 |
| Priority date | — |
| Expiry date | Oct 16, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S162/03
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Disclosed is a process for washing or otherwise treating paper pulp. More specifically, a multi-stage paper pulp washing process including the use of a defoamer/emulsifier mixture which is adjusted at a paper manufacturing site for each stage. The same defoamer may be used in each washing stage. However, solubility is adjusted at the paper manufacturing site by adding a small amount of emulsifier to the defoamer as appropriate for the particular stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.