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Chempatents Inc
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Chempatents Inc
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Publication of ES221462A1publicationCriticalpatent/ES221462A1/en
Organic Low-Molecular-Weight Compounds And Preparation Thereof
(AREA)
Abstract
Process for manufacturing terephthalic acid, characterized in that it comprises converting liquid para-diisopropylbenzene into oxidation intermediates, by reaction with molecular oxygen at elevated temperatures, and then converting the intermediate oxidation products into terephthalic acid, by reaction with molecular oxygen in presence of a heavy metal catalyst and a lower carboxylic acid of 1 to 4 carbon atoms in the molecule, at a temperature of the order of 150 to 275ºC and a gauge pressure of the order of 7 to 105 kg/cm2 to maintain a phase liquid of the lower acid. (Machine-translation by Google Translate, not legally binding)
ES0221462A1954-04-291955-04-28A manufacturing procedure of tereftal acid (Machine-translation by Google Translate, not legally binding)
ExpiredES221462A1
(en)
Procedure for the preparation of catalyst support for the obtaining of maleic anhydride by the partial catalytic oxidation of benzene (Machine-translation by Google Translate, not legally binding)