Pulping with quinones and hydroquinones
US4213821A · kind A · utility
19Cited by
6References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 25, 1977 |
| Grant date | Jul 22, 1980 |
| Priority date | — |
| Expiry date | May 25, 1997 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21C3/222
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process for the delignification of lignocellulosic material is described wherein the lignocellulosic material is cooked with an alkaline or neutral sulphite pulping liquor, and there is added to the pulping liquor at least 0.001% by weight of an additive compound or mixture of additive compounds selected from quinones and hydroquinones.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.