功能化离子液体催化氧化偏三甲苯合成 2,3,5- 三甲基苯醌

以磺酸基功能化离子液体与CuCl2的配合物为催化剂,H2O2为氧化剂,直接催化氧化偏三甲苯合成2,3,5-三甲基苯醌。考察了催化剂用量与配比、反应温度、反应时间等因素对反应的影响。探讨了功能离子液体与CuCl2的配合物催化氧化反应机理。该催化剂体系具有较好的活性和选择性,2,3,5-三甲基苯醌产率达78.7%,纯度为99.5%。该方法具有原子经济性好,生产成本低,环境污染小,催化剂可循环利用,为工业生产2,3,5-三甲基苯醌提供了一种较好的方法。

Functionalized ionic liquid catalytic oxidation of pseudocumene to 2,3,5-trimethyl-benzoquinone

Pseudocumene was oxidized catalytically to 2,3,5-trimethyl-benzoquinone using complex of SO3H functionalized ionic liquid and copper(II) chloride as catalyst,H2O2 as the oxidant.The effects of reaction conditions such as dosage and ratio of the catalysts,reaction temperature,reaction time on reaction were optimized.The reaction mechanism of catalytic oxidation by complex of SO3H functionalized ionic liquid and copper(II) chloride.The results indicated that the catalyst system showed better catalytic activity and selectivity.The yield of product can be 78.7% with content of 99.5%.The method is characterized by excellent atom economy,low production cost and low environmental pollution and the catalyst can be recycled.It provided a good way for the commercial synthesis of 2,3,5-trimethyl-benzoquinone.