Process for the delignification and bleaching of chemical and semi-chemical cellulosic pulps
US4459174A · kind A · utility
29Cited by
3References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1982 |
| Grant date | Jul 10, 1984 |
| Priority date | — |
| Expiry date | Jul 21, 2002 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21C9/1057
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process for the delignification and bleaching of chemical and semi-chemical cellulosic pulps in which the pulp is subjected to a treatment with oxygen and a subsequent treatment with peroxide. The effluent from the treatment with peroxide is at least partially recycled to the treatment with oxygen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.