Extracting hemicelluloses prior to aspen chemi-thermomechanical pulping: Effects of pre-extraction on pulp properties
| Autor: | Changbin Mao, Zhirun Yuan, Qingxi Hou, Wei Liu, Kecheng Li |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
0106 biological sciences
Polymers and Plastics Pulp (paper) Organic Chemistry Sulfuric acid 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Biorefinery Pre extraction Pulp and paper industry 01 natural sciences Acetic acid chemistry.chemical_compound stomatognathic system chemistry 010608 biotechnology Physical separation Botany Materials Chemistry Hardwood engineering Hemicellulose 0210 nano-technology |
| Zdroj: | Carbohydrate polymers. 87(1) |
| ISSN: | 1879-1344 |
| Popis: | Pre-extraction of hemicelluloses prior to pulping and conversion of the extracted hemicelluloses to other by-products will provide additional revenues to traditional pulp and paper industry. The effects of hemicelluloses pre-extraction with sulfuric acid on aspen (Populus tremuloides) chemi-thermomechanical pulp (CTMP) properties were investigated in this study. The sulfuric acid pre-extraction resulted in a release of 11% of hemicelluloses (determined as xylan) and acetic acid, especially at the second press-impregnation stage. Compared with CTMP without acid pre-extraction, the acid pre-extraction significantly reduced refining energy to a given freeness, and the pulps produced from acid pre-extracted chips have lower shives, higher strength properties except zero-span breaking length, lower bulk, but lower brightness at a similar specific refining energy. This study provides useful information for integration of biorefinery in mechanical pulp mills in the future. |
| Databáze: | OpenAIRE |
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