Chemicals from wood by organic-solvent delignification. Final report

Technical Report · Sat Oct 01 04:00:00 EDT 1983

OSTI ID:5574341

April, G C; Nayak, R G; Daley, P L; Jabali, F; Meraab, J

Studies undertaken to evaluate the effectiveness of organic-solvent delignification of sweet gum and southern yellow pine wood are reported. Batch delignification investigations were conducted using aqueous n-butanol, ethanol, and phenol solutions at temperatures between 135C and 205C. Temperature, catalyst type and concentration, wood type, and treatment method were some of the variables considered. Southern yellow pine pretreatment studies were performed using water, and the use of semi-batch pulping methods was evaluated. Both delignification and pulp loss were described by first-order kinetics, and results generally agreed with those reported in the literature. Soluble pulp rate constants agreed closely with the bulk delignification rate constants, indicating the probability of a common mechanism describing the hydrolysis of wood during the initial periods. Second-step rate constants indicated a significantly slower delignification process. Finally, findings indicate that high temperatures are needed to effectively remove lignin from softwoods when no chemical additives are used.

• Research Organization: Alabama Univ., University (USA). Bureau of Engineering Research
• OSTI ID: 5574341
• Report Number(s): PB-85-180719/XAB; BER-311-124
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
140504* -- Solar Energy Conversion-- Biomass Production & Conversion-- (-1989)
CHEMICAL REACTIONS
DECOMPOSITION
DELIGNIFICATION
EXTRACTION
HYDROLYSIS
KINETICS
LYSIS
MANAGEMENT
MATERIALS RECOVERY
PROCESSING
REACTION KINETICS
RECOVERY
SEPARATION PROCESSES
SOLVENT EXTRACTION
SOLVOLYSIS
WASTE MANAGEMENT
WASTE PROCESSING
WOOD