用多次浸渍法制备了Ｐｔ—Ｓｎ—Ｋ／Ａｌ２Ｏ３丙烷催化肥氢制丙烯催化剂，该催化剂Ｐｔ含量小于０．４５％（质量），制备容易，重复性好；分别在催化剂装量为２ｍＬ和１００ｍＬ的试验装置上考察了其长周期运转情况。在常压、６１０℃、丙烷与高纯氢以１：１（ｍｏｌ）进料，气体体积空速为１５００ｈ￣（－１）的条件下，每反应５０ｈ再生一次，累计运转５００ｈ，催化剂的活性无明显降低，丙烯选择性和收率的平均值分别大于８４％和３２％。单程连续运转７４ｈ，生成丙烯的选择性和收率的平均值分别为８８．６％和３１．４％。 Pt-Sn-K / Al2O3 propane catalytic hydrogenation to propylene catalyst was prepared by multiple impregnation method. The Pt content of the catalyst was less than 0.45% (mass), the preparation was easy and the repeatability was good. When the catalyst loading was 2mL and 100mL test device to examine the long-term operation of the situation. Under the conditions of normal pressure, 610 ℃, propane and high purity hydrogen were fed in 1: 1 (mol) and the gas space velocity was 1500h ~ (-1), the reaction was repeated for 50h and the total activity was no obvious Decreased, the average propylene selectivity and yield were greater than 84% and 32%, respectively. Continuous operation for 74 h in one pass, the average selectivity and yield of propene were 88.6% and 31.4%, respectively.