Abstract
Abstract In this work, the catalytic conversion of monosaccharides, such as d -glucose, d -fructose, d -mannose, d -galactose, and d -xylose, into lactic acid and aldonic acid in an alkaline media using supported noble metal catalysts under flowing air was investigated. Thus far, the conventional chemical conversions of d -glucose into lactic acid, such as alkaline degradations and hot water reactions, involved large amounts of by-products including unidentified compounds. To improve the atom economy for the d -glucose conversion, we examined a one-pot reaction of d -glucose into lactic acid and gluconic acid with the alkaline degradation and the air oxidation using supported metal catalysts. It succeeded in yielding about 45 C-% of lactic acid and about 45 C-% of gluconic acid from d -glucose using Pt/C catalysts with a 1.0 mol L −1 of sodium hydroxide aqueous solution at 353 K under flowing air.
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