Method for reducing unit consumption of cumene in epoxypropane production process using cumene co-oxidation method

The invention discloses a method for reducing unit consumption of a cumene in epoxypropane production process using a cumene co-oxidation method. In a process for producing epoxypropane by a cumene co-oxidation method, heavy components such as diisopropylbenzene and the like are byproduced when cumene is prepared by hydrogenolysis of dimethyl benzyl alcohol. According to the invention, a heavy component is converted into cumene through two steps of thermal cracking and catalytic hydrogenation to be recycled, so that the economical efficiency and competitiveness of a process for producing epoxypropane through a cumene co-oxidation method are remarkably improved. 本发明公开了一种异丙苯共氧化法生产环氧丙烷过程异丙苯单耗降低的方法。异丙苯共氧化法生产环氧丙烷工艺中，二甲基苄醇氢解制备异丙苯时副产并异丙苯等重组分。本发明通过热裂解、催化加氢两步将该重组分转化为异丙苯循环再利用，显著提升异丙苯共氧化法生产环氧丙烷工艺的经济性、竞争力。