Inhibition of acid-catalyzed depolymerization of cellulose with boric acid in non-aqueous acidic media.
Boric acid inhibited the acid-catalyzed depolymerization of cellulose in sulfolane, a non-aqueous medium, at high temperature. Formation of the dehydration products such as levoglucosenone, furfural, and 5-hydroxymethyl furfural were also effectively inhibited. Similar inhibition was observed for cellooligosaccharides and starch, although the glucosidic bonds in methyl glucopyranosides and methyl cellobioside were cleaved to form alpha-d-glucofuranose cyclic 1,2:3,5-bisborate.
Graduate School of Energy Science, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto 606-8501, Japan. kawamoto@energy.kyoto-u.ac.jp
Haruo
H
Kawamoto
Shinya
S
Saito
Shiro
S
Saka
D000143:Acids; D001888:Boric Acids / Q000737:chemistry* / Q000494:pharmacology; D002236:Carbohydrate Conformation; D002482:Cellulose / Q000737:chemistry*; D009844:Oligosaccharides; D013213:Starch; D013876:Thiophenes
D000143:Acids; D001888:Boric Acids; D009844:Oligosaccharides; D013876:Thiophenes; D002482:Cellulose; D013213:Starch; C032688:boric acid; C013693:sulfolane