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Instytut Chemii Przemyslowej
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Instytut Chemii Przemyslowej
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Publication of ES398745A1publicationCriticalpatent/ES398745A1/en
Process for preparing trimellitic anhydride by thermal dehydration, in the solvent and in the presence of an inert gas, of the trimellitic acid produced in the process of oxidation of pseudo-cumene with molecular oxygen, at elevated temperature and pressure, in an acetic acid medium as a solvent, of heavy metal salts as a catalyst and promoter or activator, characterized in that the dehydration is carried out under pressure after having previously separated certain partial oxidation products, and that partial oxidation products of this reaction are applied as process promoters. Of oxidation of pseudo-cumene to trimellitic acid. (Machine-translation by Google Translate, not legally binding)
ES398745A1974-01-191972-01-11Procedure for preparing trimelitic anhydride. (Machine-translation by Google Translate, not legally binding)
ExpiredES398745A1
(en)
Procedure for the continuous obtaining of carboxylic acids and anhydrides of dicarboxilic acid. (Machine-translation by Google Translate, not legally binding)