Catalytic solvent delignification of agricultural residues: organic catalysts

Journal Article · Tue Nov 01 04:00:00 EST 1983 · Biotechnol. Bioeng.; (United States)

DOI:https://doi.org/10.1002/bit.260251108· OSTI ID:6720753

Ghose, T K; Pannir Selvam, P V; Ghosh, P

The effects of moderate-temperature aqueous butanol pretreatment of rice straw on several organic catalysts have been studied. Maximum delignification was obtained with an aromatic organic acid catalyst. Presoaking of straw in aqueous butanol improved delignifiction, particularly in high solid-liquid ratios. However, due to the difficulty of penetration of lignin into the solvent phase, an increase in the solid-liquid ratio appears to affect delignification. A two-stage catalytic solvent process involving presoaking at 80 degrees C followed by delignification at 120 degrees C resulted in 83% removal of lignin in aqueous-butanol, whereas 75% lignin removal was possible in ethanol. Higher reduction in the crystallinity was possible with ethanol. Lignin produced by the solvent process offers desirable physical properties for polymer applications compared to Kraft lignin. (Refs. 26).

• Research Organization: Indian Inst. of Tech., India
• OSTI ID: 6720753
• Journal Information: Biotechnol. Bioeng.; (United States), Journal Name: Biotechnol. Bioeng.; (United States) Vol. 25:11; ISSN BIBIA
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
140504* -- Solar Energy Conversion-- Biomass Production & Conversion-- (-1989)
ALCOHOLS
BUTANOLS
CARBOHYDRATES
CATALYSTS
CEREALS
CHEMICAL REACTIONS
DECOMPOSITION
DELIGNIFICATION
ENZYMATIC HYDROLYSIS
ETHANOL
GRAMINEAE
GRASS
HYDROLYSIS
HYDROXY COMPOUNDS
LIGNIN
LYSIS
ORGANIC ACIDS
ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
PLANTS
POLYSACCHARIDES
RICE
SACCHARIDES
SACCHARIFICATION
SOLVENTS
SOLVOLYSIS
STRAW
TEMPERATURE EFFECTS