【摘要】 脂肪醇是精细化工的重要原料,工业Cu/Zn催化剂易失活,使用寿命较短。在间歇釜高压反应器中考察了甘油和三乙酸甘油酯对Cu/Zn催化剂上月桂酸甲酯加氢制月桂醇催化活性的影响,采用XRD、BET、GC-MS和TG-DTA等分析和表征方法对失活催化剂和反应产物进行了分析。结果表明,甘油和三乙酸甘油酯在催化剂作用下分别得到强疏油性的1,2-丙二醇和难溶的交联物,并吸附在催化剂上,导致催化剂活性中心被覆盖,催化剂比表面积减小,引起催化剂失活。更多还原

【Abstract】 Natural fatty alcohols have become the important base feedstock of fine chemical industry. The lifetime of the commercial Cu/Zn catalyst was shortened due to its deactivation. Deactivation of Cu/Zn catalyst caused by glycerine and glyceryl triacetate in hydrogenation of methyl laurate to lauryl alcohol was studied. The catalysts were characterized by XRD, BET, TG-DTA, and the product was analyzed by GC-MS. The results indicated that glycerine and glyceryl triacetate, in the presence of Cu/Zn catalyst, could be decomposed to oleophobic 1,2-propanediol and insoluble cross-linked solids, respectively, which caused surface area decrement and deactivation of the catalyst by adsorption and then active site occlusion.更多还原