Process for the delignification of lignocellulosic material with oxygen, ferricyanide, and a protector
US4622100A · kind A · utility
7Cited by
16References
16Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 1, 1984 |
| Grant date | Nov 11, 1986 |
| Priority date | — |
| Expiry date | Oct 1, 2004 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21C9/147
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The use of primary and secondary amines and certain other compounds in ferricyanide assisted oxygen delignifying bleaching of lignocellulosic pulps permits more rapid removal of a desired amount of lignin from the pulp and, hence, the retention of higher pulp viscosity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.