Process for the preparation of a glyoxylic ester

Details Process for the preparation of a glyoxylic ester Process for the preparation of a glyoxylic ester

C - Chemistry, Metallurgy

07

C

260/488, 202/99

C07C 69/716 (2006.01) C07C 69/67 (2006.01)

Patent

CA 1224216

- 1 - Abstract of the disclosure The invention relates to a process for the pre- paration of a glyoxylic ester by catalytic oxidative dehydrogenation of the corresponding glycolic ester in the gas phase. The gaseous reaction mixture formed in the oxidative dehydrogenation is, after metering in an entrainer, passed to the central part of a fractionating column. This rapidly cools the reaction mixture, and the water of reaction and other low boilers are, together with the entrainer, distilled out overhead. The gly- oxylic ester remains behind as the bottom product.

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