【摘要】 研究了以乙二胺和 1,2 -丙二醇为原料通过多相催化法合成 2 -甲基吡嗪的工艺路线。通过对催化剂活性组分、活性组分配比、催化剂载体、焙烧温度等影响因素的研究讨论 ,确定了锌、锰、铬 3种元素以 2∶2∶1(质量比 )的比例浸渍的活性炭载体上的催化剂具有较高的活性和选择性。反应温度为 360℃时 ,产品收率可达 86 7%。更多还原

【Abstract】 This paper studies a process of preparing 2\|methylpyrazine by vapor\|gas phase heterogeneous catalytic reation of ethylenediamine with propylene glycol. The effects of active components,the ratio of active components,carriers and calcined temperature,are investigated systematically. The effective and selective catalyst is prepared by impregnation of Zn\|Mn\|Cr nitrates on the charcoal with the ratio of 2∶2∶1 by weight. The catalyst is used at 360℃ and the yield is 86.7%.更多还原