Modification of alkaline pulping to facilitate the isolation of aliphatic acids. Part 1. Sodium hydroxide pretreatment of pine wood

Journal Article · Sun Jan 01 04:00:00 EST 1984 · J. Wood Chem. Technol.; (United States)

DOI:https://doi.org/10.1080/02773818408070658· OSTI ID:5748822

Alen, R; Niemelae, K; Sjoestroem, E

Pretreating pine chips (Pinus sylvestris) with sodium hydroxide prior to the alkaline delignification kraft, kraft-anthraquinone, and soda-anthraquinone) can facilitate the recovery of the carbohydrate degradation products from alkaline pulping liquors. Under suitable pretreatment conditions large amounts of carbohydrate degradation products (alipahtic acids) were formed relative to lignin. The lignin fraction was composed of comparatively low-molecular-weight fragments. Although the delignification was considerably retarded and the yield (based on wood) was decreased by 1-3%, the properties of the resulting pulp were essentially maintained despite pretreatment. Finally, data are given for the composition of aliphatic acids in liquors resulting from pretreatments.

• Research Organization: Helsinki Univ. of Technology, Espoo, Finland
• OSTI ID: 5748822
• Journal Information: J. Wood Chem. Technol.; (United States), Journal Name: J. Wood Chem. Technol.; (United States) Vol. 4:4; ISSN JWCTD
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
140504* -- Solar Energy Conversion-- Biomass Production & Conversion-- (-1989)
ALKALI METAL COMPOUNDS
ALKALINE HYDROLYSIS
ANTHRAQUINONES
AROMATICS
CARBOHYDRATES
CHEMICAL REACTIONS
CONIFERS
DECOMPOSITION
DELIGNIFICATION
HYDROGEN COMPOUNDS
HYDROLYSIS
HYDROXIDES
LIGNIN
LYSIS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXYGEN COMPOUNDS
PINES
PLANTS
POLYSACCHARIDES
QUINONES
RECOVERY
SACCHARIDES
SODIUM COMPOUNDS
SODIUM HYDROXIDES
SOLVOLYSIS
TREES
WOOD