Delignification of cellulosic material with an alkaline aqueous medium containing oxygen dissolved therein
US4089737A · kind A · utility
20Cited by
8References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 30, 1976 |
| Grant date | May 16, 1978 |
| Priority date | — |
| Expiry date | Aug 30, 1996 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21C3/026
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Cellulosic material is delignified with oxygen previously dissolved into a fresh alkaline aqueous medium, all of the oxygen contacting said cellulosic material being introduced into said cellulosic material by said alkaline aqueous medium containing oxygen dissolved therein and the cellulosic material consistency during delignification being such as to form an agglomeration of said cellulosic material and alkaline aqueous medium in the form of a layer without any gaseous space therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.