Process for the co-production of dissolving-grade pulp and xylan
US6057438A · kind A · utility
30Cited by
20References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 2, 1997 |
| Grant date | May 2, 2000 |
| Priority date | — |
| Expiry date | Oct 2, 2017 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21C11/0007
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Disclosed is a process for upgrading paper-grade wood pulp to dissolving grade pulp which is suitable for use in the preparation of viscose rayon, cellulose ethers and cellulose esters such as cellulose acetate. The process utilizes a sequence of caustic extraction, xylanase treatment and caustic extraction to remove most of the xylan, which may be recovered for use in the production of xylose, xylitol, and furans.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.