固载离子液体萃取催化耦合环己烷氧化反应研究

氧化反应在化学工业中占有极其重要的地位，环己烷氧化制环己酮是烷烃氧化工业化过程的重要代表，也是催化科学领域所长期研究的重要课题。我们在长期进行离子液体合成及其在化学反应中的应用，以及对氧化反应进行长期研究的基础上，提出以空气为氧源，利用在固体催化剂表面负载一层离子液体，利用离子液体层所具有的性质，减少环己基过氧化物、环己酮和环己醇在固体催化剂表面的停留时间，减少深度氧化的发生，实现高转化率与高选择性地制备KA油。利用已有的离子液体负载方法，精确控制负载条件，实现离子液体负载层厚度可控；将离子液体的萃取作用与固体催化剂的催化反应作用相耦合，揭示环己烷、环己酮、环己醇、环己基过氧化氢在反应液相主体、离子液体和固体催化剂之间传递行为，寻找反应与传递的平衡点；探寻离子液体负载层与固体催化剂的作用机制，阐明离子液体负载催化剂作用下环己烷空气氧化的反应机理，为其他烷烃空气氧化提供指导。

Oxidation reaction plays an extremely important role in the chemical industry. Cyclohexane oxidation to cyclohexanone is an important representative of the alkane oxidation process, is also an important topic in catalytic sciences area for a long time. Based on a long-term synthesis of ionic liquids and its application in chemical reactions, as well as on the oxidation reaction research, we suggest a new cyclohexane oxidation method. With air as oxygen source, supported ionic liquid solids as catalysts, using the properties of ionic liquid layer on the surface of a solid to reduce residence time of cyclohexyl peroxide, cyclohexanone and cyclohexanol in the surface of a solid catalyst, so as to reduce the deep oxidation occurs, the high conversion of cyclohexane and high selectivity of KA oil will be achieved. Research the support method and controll the supporting condition precisely to realize the controllable thickness of supported ionic liquid layer. The Ionic liquid extraction will be coupled with the catalytic reaction. We hope to reveal the transfer behavior of cyclohexane cyclohexanone, cyclohexanol and cyclohexyl hydrogen peroxide between the main phase, the ionic liquid layer and the solid catalyst, so as to look for the balance point of reaction and transfer. Explore the mechanism of action of the ionic liquid supported layer and the solid catalyst to elucidate the reaction mechanism of air oxidation of cyclohexane catalyzed by ionic liquid supported catalyst, and to provide guidance for other alkanes oxidation.