PRODUCTION OF NAPHTHALENEDICARBOXYLIC ACID

PURPOSE:To provide a process for stably producing high-quality NDCA under a mild condition in a high yield over a long period even by recycling a cobalt and manganese catalyst while suppressing the lowering of the catalytic activity to an extremely low level. CONSTITUTION:Naphthalenedicarboxylic aci...

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Bibliographic Details
Main Authors TAKEI NOBUHIRO, YASUHARA MITSUTATSU, YAMAMOTO TOMOYOSHI, TACHIBANA YAKUDO
Format Patent
LanguageEnglish
Published 01.03.1994
Edition5
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
APPARATUS THEREFOR
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
CHEMISTRY
GENERAL METHODS OF ORGANIC CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
THEIR RELEVANT APPARATUS
TRANSPORTING
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Summary:PURPOSE:To provide a process for stably producing high-quality NDCA under a mild condition in a high yield over a long period even by recycling a cobalt and manganese catalyst while suppressing the lowering of the catalytic activity to an extremely low level. CONSTITUTION:Naphthalenedicarboxylic acid is produced by oxidizing diisopropylnaphthalene with molecular oxygen in a solution of acetic acid, propionic acid or their mixture containing a catalyst composed of a soluble cobalt salt, a soluble manganese salt and a bromine compound. An aliphatic carboxylic acid anhydride is added to the system in the process for the production of the naphthalenedicarboxylic acid.
Bibliography:Application Number: JP19920210160