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Novel Reaction Scheme for the Selective Oxidation of o-Xylene to Phthalic Anhydride

机译:将O-二甲苯选择氧化成邻苯二甲酸酐的新型反应方案

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The oxidation of o-xylene to phthalic anhydride is one of the important industrial processes based on selective oxidation reactions. For the last 50 years vanadia - titania catalysts have been used in this process. The reaction parameters like temperature range of operation, reactor inlet pressure, contact time, etc. slightly changed during this continuous process optimization. However, the fundamental understanding of the byproduct formation is still an open task. By using a sample port pilot plant, a detailed investigation was conducted for the first time of the by-product formation at different operation conditions. Several hitherto unknown intermediates could unambiguously be identified. The combination of process conditions and by-product formation enables the discussion of a new improved reaction scheme for the catalytic oxidation of o-xylene.
机译:O-二甲苯氧化成邻苯二甲酸酐是基于选择性氧化反应的重要工业过程之一。在过去50年中,vanadia - 钛菊催化剂已被用于该过程中。反应参数如操作温度范围,反应器入口压力,接触时间等在该连续过程优化期间略有变化。然而,对副产品形成的根本了解仍然是一个开放的任务。通过使用样品端口先导工厂,在不同操作条件下进行副产物形成的第一次进行详细的研究。几个迄今为止未知的中间体可以明确识别。工艺条件和副产物形成的组合能够讨论用于O-二甲苯的催化氧化的新改进的反应方案。

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