Abstract
The ash-AQ lignin from the black liquor of oil palm empty fruit bunch was fractionated into four fractions by successive extraction with organic solvents of increasing hydrogen-bonding capacity. A comparison study of the lignin heterogeneity between the fractions was made in terms of fractional yield, content of associated polysaccharides, molecular weight, contents of carbonyl, phenolic hydroxyl, and aliphatic hydroxyl groups, and thermal stability. It was found that the content of carbonyl groups and the ratio of non-condensed syringyl/guaiacyl units decreased considerably with increasing molecular weight whereas the thermal stability increased.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
