Delignification and bleaching of lignocellulosic pulp via photo-oxygenation
US4294654A · kind A · utility
4Cited by
6References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 21, 1980 |
| Grant date | Oct 13, 1981 |
| Priority date | — |
| Expiry date | Mar 21, 2000 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21C9/1068
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process for the delignification and bleaching of lignocellulosic pulp employing electronically excited oxygen generated in situ which comprises subjecting an aqueous slurry of said lignocellulosic pulp having a consistency of from about 0.01% to about 10.0%, by weight of oven-dried pulp, and whose slurry pH is between about 8 and about 13 to irradiation with ultraviolet light while admitting oxygen into said slurry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.