摘要:
Disclosed is a process in two or more steps for oxidation of cymenes to aromatic carboxylic acids. Said process comprises a first oxidation step in gas phase with air or molecular oxygen in presence of a nitric acid, Mn(VII), permanganate, Mn(II) and/or Co(II) and/or V 2 O 5 comprising catalyst, follwed by a second oxidation step in liquid phase in presence of a Co/Mn/Br catalyst.
摘要翻译:公开了将二氧化锰氧化成芳族羧酸的两个或多个步骤的方法。 所述方法包括在硝酸,Mn(VII),高锰酸盐,Mn(II)和/或Co(II)和/或包含催化剂的V 2 O 5的存在下,与空气或分子氧气相的第一氧化步骤, 在Co / Mn / Br催化剂存在下,液相中的第二氧化步骤。