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META-OR PHTHALIC ACID PREPARATION IN BENZOIC ACID-WATER SOLVENT SYSTEM
META-OR PHTHALIC ACID PREPARATION IN BENZOIC ACID-WATER SOLVENT SYSTEM
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机译:苯甲酸-水溶剂体系中亚甲基邻苯二甲酸的制备
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摘要
Meta- or para-phthalic acids were prepd. by semi continuous or continuous air oxidn. of m- or p-xylene at 275≦̸C in monocarboxylic acid in the presence of transition metal catalysts and source of Br. The compns. of solvent system were 85-97 wt.% of BzOH and 15-3 wt.% of H2O and most used transition metal catalysts were Mn, Co and Ce.
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