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首页> 外文期刊>Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications >Catalytic oxidation of cyclohexane to cyclohexanone and cyclohexanol by oxygen in a solvent-free system over metal-containing ZSM-5 catalysts
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Catalytic oxidation of cyclohexane to cyclohexanone and cyclohexanol by oxygen in a solvent-free system over metal-containing ZSM-5 catalysts

机译：含金属的ZSM-5催化剂在无溶剂体系中用氧气将环己烷催化氧化为环己酮和环己醇

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摘要

Heterogeneous oxidation of liquid cyclohexane by molecular oxygen was carried out over metal-containin g ZSM-5 catalysts in a solvent-free system. Among those M-ZSM-5 and M/ZSM-5 catalysts tested, Co-containing ZSM-5 catalysts including Co/ZSM-5 (prepared by ion-exchange and calcination) and Co-ZSM-5 (prepared by ion-exchange and drying) showed the best activity for the oxidation of cyclohexane to cyclobexanone and cyclohexanol. Co/ZSM-5 had almost the same activity as Co-ZSM-5 for the cyclohexane oxidation; however, the leaching of cobalt from CoZSM-5 readily occurred. Co/ZSM-5 (calcined) catalyst could achieve about 10 mol% conversion of cyclohexane and 97% selectivity of KA-oil (the mixture of cyclohexanone and cyclohexanol) at 393 K under the pressure of 1.0 MPa O-2. In addition, other factors like the temperature, the pressure, the time, various metals, the tert-butylhydroperoxide (TBHP) addition, and the catalyst reuse were investigated carefully. For the titled oxidation, Co/ZSM-5 was recyclable, and could behave as a truly heterogeneous catalyst. (c) 2006 Elsevier B.V. All rights reserved.
机译：在无溶剂体系中，在含金属的ZSM-5催化剂上，分子氧对液态环己烷进行了非均相氧化。在测试的那些M-ZSM-5和M / ZSM-5催化剂中，含Co的ZSM-5催化剂包括Co / ZSM-5（通过离子交换和煅烧制备）和Co-ZSM-5（通过离子交换制备）干燥）显示出最佳的环己烷氧化成环己酮和环己醇的活性。 Co / ZSM-5的环己烷氧化活性几乎与Co-ZSM-5相同。然而，钴从CoZSM-5中的浸出很容易发生。 Co / ZSM-5（煅烧）催化剂在1.0 MPa O-2的压力下，在393 K下可实现约10 mol％的环己烷转化率和97％的KA油（环己酮与环己醇的混合物）选择性。此外，还仔细研究了其他因素，例如温度，压力，时间，各种金属，叔丁基过氧化氢（TBHP）的添加以及催化剂的再利用。对于标题的氧化，Co / ZSM-5是可回收的，并且可以充当真正的多相催化剂。 （c）2006 Elsevier B.V.保留所有权利。

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