Abstract
A new process for recovery of high-molar-mass and pure
xylan in large quantities from bleached birch kraft pulp
has been developed. The process consists of an alkaline
extraction, after which xylan can be directly
precipitated on the extracted fibers, or it can be
isolated by ultrafiltration or by precipitation using
carbon dioxide. The isolated xylan is recovered as a
white creamy colloid or precipitate. A prerequisite for
the feasibility of the process is that the NaOH
extraction liquor is recirculated in the process. The
xylan product was successfully tested as a papermaking
chemical for fiber bonding and surface sizing, resulting
in increased bonding and strength. Other application
areas could be cosmetics, food stuff and pharmaceuticals,
due to the high purity and whiteness of the isolated
xylan. The extracted bleached birch kraft pulp exhibited
some interesting properties, such as decreased content of
extractives, improved brightness stability, and
drainability.
| Original language | English |
|---|---|
| Title of host publication | TAPPI Engineering, Pulping and Environmental Conference 2009 |
| Subtitle of host publication | Innovations in Energy, Fiber and Compliance |
| Publisher | TAPPI Press |
| Pages | 2668-2701 |
| ISBN (Print) | 978-1-61567-786-3 |
| Publication status | Published - 2009 |
| MoE publication type | A4 Article in a conference publication |
| Event | Pulping and Environmental Conference 2009: Innovations in Energy, Fiber and Compliance - Memphis, United States Duration: 11 Oct 2009 → 14 Oct 2009 |
Conference
| Conference | Pulping and Environmental Conference 2009 |
|---|---|
| Country/Territory | United States |
| City | Memphis |
| Period | 11/10/09 → 14/10/09 |