PROCESS FOR THE PREPARATION OF OXALIC ACID DIESTER

Continuous prodn. of oxalic acid diester(I) comprises (a) passing gas contg. CO and an ester of a C1-8 monohydric aliphatic or alicyclic alcohol with N2O into a reactor packed with a solid catalyst, comprising a Pt gp.metal or its salt, and reacting them at 50-200 C at a pressure from ambient to 10...

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Main Authors NISHIHARA, KEIGO, MIZUTARE, KATSUHIKO, MATSUDA, MASAOKI, TAHARA, SUSUMU, FUJII, KOZO
Format Patent
LanguageEnglish
Korean
Published 31.10.1985
Edition4
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
THEIR RELEVANT APPARATUS
TRANSPORTING
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Summary:Continuous prodn. of oxalic acid diester(I) comprises (a) passing gas contg. CO and an ester of a C1-8 monohydric aliphatic or alicyclic alcohol with N2O into a reactor packed with a solid catalyst, comprising a Pt gp.metal or its salt, and reacting them at 50-200 C at a pressure from ambient to 10 kg/sq.cm; (b) passing the prod. to a condenser where it is sepd. into N2O-contg. gas and liq. contg. (I); (C) passing the gas from step (b) to a regeneration column where it is contacted with a gas contg. O2 and an alcohol to regenerate N2O gas and give an NO concn. of 2-7 vol.% and;(d) recycling the gas from (c) to step (a).
Bibliography:Application Number: KR19810002952