Carbohydrate Research p. 155 - 164 (1997)
Update date:2022-08-05
Topics:
Heinen, Annemieke W.
Peters, Joop A.
Van Bekkum, Herman
This paper describes a study on the oxidation of D-fructose with molecular oxygen on Pt/C catalysts. Two major products are formed: 2-keto-D- gluconic acid and D-threo-hexo-2,5-diulose ('5-ketofructose'). Deactivation of the catalyst was observed, caused both by over-oxidation of the active surface and inhibition of the reaction by 2-ketogluconic acid. Although promotion of the catalyst with bismuth did not prevent deactivation, it improved the selectivity to 2-ketogluconic acid, probably due to coordination of fructose to the promoter. Other promoting metals (tin, lead and antimony) and additives like borate and hexamethylenetetramine were less successful.
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