Purification of alkyl glyoxylate

Details Purification of alkyl glyoxylate Purification of alkyl glyoxylate

C - Chemistry, Metallurgy

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C

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C07C 67/54 (2006.01) B01D 1/22 (2006.01) B01D 3/14 (2006.01) B01D 3/36 (2006.01) B01D 5/00 (2006.01) C07C 69/716 (2006.01)

Patent

CA 1324103

PURIFICATION OF ALKYL GLYOXYLATE ABSTRACT There is disclosed an improved process for the manufacture of glyoxylic acid obtained by oxida- tion of glycolic acid. For processing purposes alkyl esters of these acids are employed. Increased efficiency is obtained by recovering glycolate rich streams from one or more distillation operations and after treatment to remove acetic acid by-product the streams are recycled to the oxidation reaction.

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