Method for producing pulp
US7306698B2 · kind B2 · utility
3Cited by
22References
26Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Mar 18, 2002 |
| Grant date | Dec 11, 2007 |
| Priority date | — |
| Expiry date | Apr 9, 2022 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21C3/12
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention is a method for producing pulp from fibrous lignocellulose material using a treatment step which exposes the material to oxalic acid, or oxalic acid and sodium bisulfite, prior to pulping. The pulping of the resulting product requires less energy input and provides a pulp having enhanced physical properties as compared to untreated materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.