Method of modifying a xylan-containing carbohydrate substrate having hexenuronic acid groups attached to the xylan
US6830655B2 · kind B2 · utility
2Cited by
1References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 6, 1997 |
| Grant date | Dec 14, 2004 |
| Priority date | — |
| Expiry date | Feb 6, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S435/814
- WIPO fieldBiotechnology
- WIPO sectorChemistry
Abstract
The present invention concerns a method for enzymatic treatment of lignocellulosic materials which contain xylan-polymers, such as cellulose kraft pulps. According to a method of the present kind, at least a part of the hexenuronic acid groups present in the material is selectively removed in order to remove metal ions from the pulp, to change the surface charge thereof, to improve the brightness stability of the pulp and to render the material more suitable for enzymatic treatment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.