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Isolation and characterisation of lignin from rice hull
Author(s) -
RodríguezVázquez Refugio,
Areyzaga Mildred,
Parada Angel,
RiosLeal Elvira,
AnguisTerrazas Carlos
Publication year - 1993
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740620116
Subject(s) - lignin , chemistry , extraction (chemistry) , yield (engineering) , solvent , chromatography , nuclear chemistry , organic chemistry , materials science , metallurgy
Lignin was isolated from rice hull by dioxane acidolysis with concentrations of HCl in the solvent medium of 1.88, 3.76, 5.66, 7.56, or 11.40 g conc HCl litre −1 , and extraction times of 1 h and 2 h. Phenolic, methoxyl, and guaiacyl group contents were slightly low at 2 h of extraction, furthermore, at 2 h, the guaiacyl content of lignin extracted was reduced as the acid concentration was increased. The coniferyl group content was affected by acid concentration and extraction time. A maximum lignin yield was observed at the 5.66 g conc HCl litre −1 level and 2 h.