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Hydrolysis of sugar cane bagasse with hydrochloric acid, promoted by metallic cations
Author(s) -
Schuchardt Ulf,
Duarte Humberto C.
Publication year - 1986
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.280360706
Subject(s) - hydrolysis , chemistry , bagasse , hydrochloric acid , sugar , ferric , cellulose , acid hydrolysis , chloride , reducing sugar , organic chemistry , nuclear chemistry , pulp and paper industry , engineering
Lithium chloride, in combination with commercial grade hydrochloric acid, is very effective in the hydrolysis of prehydrolysed sugar cane bagasse. After 10 min at 50°C the holocellulosic portion is completely dissolved and after 20 min most of the sugar oligomers are hydrolysed to monomers, making the time‐and energy‐consuming post‐hydrolysis unnecessary. With longer reaction times the sugars start to reoligomerise and decompose. Zinc chloride is a milder promoter, requiring post‐hydrolysis even after reaction for 30 min at 50°C. On the other hand, it does not decompose the sugars giving the highest sugar yields after prolonged reaction time and post‐hydrolysis. Ferric chloride is mostly ineffective in the hydrolysis of cellulose but is a good promoter of the hydrolysis of the sugar oligomers, under the reaction conditions.