PRODUCTION OF ALPHA-OXOCARBOXYLIC ACID ESTER

PROBLEM TO BE SOLVED: To provide a method capable of inexpensively and efficiently producing an α-oxocarboxylic acid ester substantially at one stage, by using a 1,2-diol such as inexpensive ethylene glycol, propylene glycol or the like as a raw material. SOLUTION: A 1,2-diol is oxidized in a vapor...

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Bibliographic Details
Main Authors ARITA YOSHIO, SAITO NOBORU, OTA AKIHIKO, HASEBE REN
Format Patent
LanguageEnglish
Published 28.09.1999
Edition6
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
APPARATUS THEREFOR
CHEMISTRY
GENERAL METHODS OF ORGANIC CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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Summary:PROBLEM TO BE SOLVED: To provide a method capable of inexpensively and efficiently producing an α-oxocarboxylic acid ester substantially at one stage, by using a 1,2-diol such as inexpensive ethylene glycol, propylene glycol or the like as a raw material. SOLUTION: A 1,2-diol is oxidized in a vapor phase in a first reactor to give a gaseous α-oxoaldehyde and/or α-hydroxyaldehyde. The gaseous α- oxoaldehyde and/or α-hydroxyaldehyde is mixed with an alcohol or an olefin made into a gaseous state by a vaporizing chamber 14, introduced into a second reactor 11 and oxidatively esterified with molecular oxygen in the presence of a catalyst in the second reactor 11 to produce an α-oxocarboxylic acid ester.
Bibliography:Application Number: JP19990027974