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Asahi Chemical Industry Co Ltd
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Asahi Chemical Industry Co Ltd
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Priority to JP4360876ApriorityCriticalpatent/JPS5842857B2/en
Publication of JPS52128341ApublicationCriticalpatent/JPS52128341A/en
Publication of JPS5842857B2publicationCriticalpatent/JPS5842857B2/en
Organic Low-Molecular-Weight Compounds And Preparation Thereof
(AREA)
Abstract
PURPOSE: To obtain the purified terephthalic acid useful as a starting material for polyesters, by treating the crude terephthalic acid which contains p-formylbenzoic acid with acetic acid or the water-containing acetic acid in the presence of urea at 130°C or below under heating.