题名: oxidation of glyoxal with hydroperoxide compounds prepared from maleic acid by ozonation to produce glyoxylic acid
作者: Sun Z.C.; Eli W.; Xu T.Y.; Zhang Y.G.
刊名: Industrial and Engineering Chemistry Research
卷: 45, 6, 1849-1852
摘要: A novel process has been discovered for the production of glyoxylic acid. When the ozonolysis of maleic acid was conducted in solvents that contained methanol, acetic acid, or formic acid at approximately -5°C, hydroperoxide compounds and glyoxylic acid hemiacetal were formed in high yield (>95%). The prepared mixture then was dropped into a glyoxal solution (the molar ratio of maleic acid and glyoxal was slightly greater than 1:1) that had been warmed to ∼38°C. Glyoxal was oxidized by the hydroperoxides in the mixture via a Baeyer-Villiger rearrangement. When the reaction ended, some water was added to the solution and organic solvents were distilled off at reduced pressure at 50°C. An aqueous solution of glyoxylic acid was obtained. Through this procedure, both maleic acid and glyoxal were converted to glyoxylic acid. © 2006 American Chemical Society.
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作者单位: Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi 830011, China;Graduate University, Chinese Academy of Sciences, Beijing, China
Sun Z.C.,Eli W.,Xu T.Y.,et al. oxidation of glyoxal with hydroperoxide compounds prepared from maleic acid by ozonation to produce glyoxylic acid[J]. Industrial and Engineering Chemistry Research,2006,45(6):1849-1852.