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Hydrolysis of sugar cane bagasse with hydrochloric acid, promoted by ultrasound
Author(s) -
Schuchardt Ulf,
Joekes Inés,
Duarte Humberto C.
Publication year - 1987
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.280390206
Subject(s) - bagasse , hydrolysis , hydrochloric acid , sugar cane , lithium chloride , chemistry , acid hydrolysis , sugar , chloride , cane , lithium (medication) , nuclear chemistry , pulp and paper industry , organic chemistry , agronomy , medicine , engineering , biology , endocrinology
Ultrasound effectively promotes the hydrolysis of pre‐hydrolysed sugar cane bagasse using 38% concentrated hydrochloric acid. In combination with lithium chloride, ultrasonic promotions as high as 62% were observed. Of the three frequencies (25, 35 and 40 kHz) studied, the lowest promoted the hydrolysis most effectively but, when in combination with lithium chloride, reoligomerised the sugars. The higher frequencies of 35 and 40 kHz required larger concentrations of lithium chloride for complete conversion. Irradiation with 40 kHz also promoted subsequent acid hydrolysis of the sugar oligomers.