Bulletin of the Chemical Society of Japan p. 1995 - 2000 (1997)
Update date:2022-08-11
Topics:
Ai, Mamoru
Ohdan, Kyoji
Iron phosphates with a P/Fe atomic ratio of 1.2 were found to be effective as catalysts for a vapor-phase oxidative dehydrogenation of glycolic acid to glyoxylic acid.The effects of the reaction variables on the conversion and selectivity were studied.The optimum reaction temperature was around 240 deg C and the optimum feed rate of oxygen was in the range of 10 to 25 mmol h-1 when the feed rate of glycolic acid was 12.3 mmol h-1.The reaction was not affected by a variation in the feed rate of water vapor in the range of 86 to 480 mmol h-1.The selectivity to glyoxylic acid remained unchanged at 74 molpercent with an increase in the conversion of glycolic acid up to 70percent; the highest yield of glyoxylic acid was 56.5 molpercent at the conversion of 80percent.
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