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首页> 外文会议>ACS Symposium Series 890; Symposium on Nanotechnology and the Environment: Applications and Implications; ; >Catalytic Oxidations Using Nanosized Octahedral Molecular Sieves
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Catalytic Oxidations Using Nanosized Octahedral Molecular Sieves

机译：使用纳米八面体分子筛的催化氧化

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Considerable efforts have been invested to accomplish hydrocarbon oxidation using heterogeneous catalysts with excellent properties. Readily available starting chemicals add valuable versatile chemicals are the main targets for the petroleum industry. Oxidations are widely accepted procedures for synthesizing intermediates for the bulk chemical and pharmaceutical industry. However, this reaction is hard to perform and requires extreme conditions. High pressures and high temperatures are usually required. Gas phase reactions are non-selective, and carbon monoxide and carbon dioxide are formed due to complete oxidation. Environmentally friendly reactions of oxidation have received much attention by industry. Cost efficient processes such as solvent free, low energy consumption, and non-pressurized methods are desirable. The development of a catalytic, highly selective, energy efficient, and environmentally friendly process of oxidation is highly desirable. Stoichiometric oxidations of chemical compounds by active manganese oxides have been known for a long time. Stoichiometric oxidation is unattractive and catalytic oxidations will replace traditional Stoichiometric methods. The synthetic OMS (Octahedral Molecular Sieves) materials, which occur as cryptomelane in nature, have been reported for alcohol oxidations. Alcohols can be easily converted to aldehydes and ketones. The kinetics and mechanism of alcohol oxidation have also been also reported. Based on these reports, alcohol oxidations can be broadened to hydrocarbon oxidations. OMS materials can be utilized for the oxidation of hydrocarbons. Various stoichiometric oxidations of hydrocarbons were reported. Potassium permanganate adsorbed on a solid support oxidized alkylbenzene at the benzylic position. These oxidations mostly require stoichiometric oxidants. Strong acids, halogen compounds, and halogenated solvents are usually required.
机译：已经投入了大量的努力来使用具有优异性能的非均相催化剂完成烃的氧化。随时可用的起始化学品加上有价值的通用化学品是石油工业的主要目标。氧化是用于合成化学和制药工业中间体的广泛接受的方法。但是，该反应难以进行，需要极端条件。通常需要高压和高温。气相反应是非选择性的，并且由于完全氧化而形成一氧化碳和二氧化碳。环保的氧化反应已受到业界的广泛关注。需要诸如无溶剂，低能耗和非加压方法之类的成本有效的方法。非常需要开发催化的，高度选择性的，节能的和环境友好的氧化方法。活性锰氧化物对化合物进行化学计量氧化已经很长时间了。化学计量氧化没有吸引力，催化氧化将取代传统的化学计量方法。据报道，合成的OMS（八面体分子筛）材料在自然界以隐密胺的形式存在，已被报道可用于酒精氧化。醇很容易转化为醛和酮。还已经报道了醇氧化的动力学和机理。根据这些报告，醇氧化可扩展为烃氧化。 OMS材料可用于碳氢化合物的氧化。报道了各种化学计量的碳氢化合物氧化。高锰酸钾吸附在固体载体上的苄基位置氧化了烷基苯。这些氧化主要需要化学计量的氧化剂。通常需要强酸，卤素化合物和卤化溶剂。

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