Carbonylation of formaldehyde catalyzed by p-toluenesulfonic acid |
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Authors: | Tao Li Yoshie Souma Qiang Xu |
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Affiliation: | National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan |
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Abstract: | A catalytic system consisting of p-toluenesulfonic acid, a transition metal complex such as CF3SO3Ag, and a solvent exhibits a high catalytic performance for the carbonylation of formaldehyde, followed by esterification with methanol, to produce methyl glycolate. The catalytic performance is significantly improved by using the ionic liquid, 1-butyl-3-methylimidazolium hexafluorophosphate, instead of organic solvents. This catalytic system shows higher yield of methyl glycolate at relatively low CO pressure in comparison to solid acid catalysts. The present system provides a potential process for synthesizing methyl glycolate via carbonylation of formaldehyde in much low corrosion in comparison to the previous system including strong inorganic liquid acids as solvents and catalysts. |
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Keywords: | Formaldehyde Carbonylation Glycolic acid Methyl glycolate p-Toluenesulfonic acid Catalysis |
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