Zhou, Lipeng published the artcileConversion of recalcitrant cellulose to alkyl levulinates and levulinic acid via oxidation pretreatment combined with alcoholysis over Al2(SO4)3, Computed Properties of 539-88-8, the main research area is cellulose oxidation aluminum sulfate catalyst alcoholysis alkyl levulinate.
Conversion of cellulose to chems. is an economic and environmental route for biomass utilization. In this work, efficient conversion of cellulose to alkyl levulinates and levulinic acid was realized by oxidation pretreatment combined with alcoholysis over Al2(SO4)3 catalyst. Proper pre-oxidation conditions including oxidation temperature and time are important. By pre-oxidation, part of hydroxymethyl groups on cellulose was converted to carboxyl groups which provide the Bronsted acid sites near the glycosidic bonds to improve the depolymerization of cellulose to monosaccharide. Al2(SO4)3·18H2O can play both Bronsted and Lewis acid roles in methanol and catalyze the conversion of monosaccharide to alkyl levulinates and levulinic acid. After pre-oxidation at optimized conditions, cellulose can be converted into Me levulinate and levulinic acid over Al2(SO4)3 in methanol efficiently, and total yield of Me levulinate and levulinic acid can reach 66.8% at 180°C for 3 h. Furthermore, the simple and cheap Al2(SO4)3 catalyst is recyclable which is important for the practical application.
Cellulose (Dordrecht, Netherlands) published new progress about Alcoholysis. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Computed Properties of 539-88-8.
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics