Method of producing pulp with high yield using a two-stage refining system operating at different temperatures
US5853534A · kind A · utility
4Cited by
1References
21Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 18, 1997 |
| Grant date | Dec 29, 1998 |
| Priority date | — |
| Expiry date | Sep 18, 2017 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21B1/14
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method of producing mechanical and chemi-mechanical pulp with a yield above 85 % from lignocellulose-containing material for the manufacture of paper or board products. The material is subjected to mechanical processing in at least two steps. The material at its feed into the first step has a temperature below the softening temperature of lignin. When the material is fed into at least one subsequent processing step, it shall have a temperature above the softening temperature of lignin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.