预硫化加氢催化剂石蜡钝化工艺研究

采用脱水、脱芳烃的固体石蜡对预硫化加氢催化剂进行钝化处理，考察了石蜡用量、钝化时间、钝化温度对加氢催化剂钝化效果的影响。以催化裂化柴油为原料，采用固定床连续微反装置对钝化前、后的催化剂进行活性评价，同时以ONU自热测试装置对钝化的催化剂自热最高温度进行评价，确定最佳钝化工艺条件。实验结果表明，采用石蜡对预硫化加氢催化剂进行钝化处理是可行的，最佳的钝化工艺条件为：石蜡与催化剂的质量比15%，钝化时间10～15min，钝化温度60℃。该工艺操作简单，可有效抑制催化剂的自热反应，并能保持催化剂的活性，易于活化。

STUDY ON THE PASSIVATION OF PRESULFIDED HYDROGENATION CATALYST WITH PARAFFIN WAX

The passivation treatment of presulfided hydrogenation catalyst was conducted using a dehydrated and dearomatization paraffin wax as passivator and the effect of treating conditions on the maximum self-heating temperature and the activity of the catalyst was investigated.The activities of catalysts prior and post to passivation were evaluated by continues fixed-bed micro-reactor using FCC diesel fraction as feed and their maximum self-heating temperatures were determined on an ONU device.Test results show that it is feasible to passivate presulfided hydrogenation catalyst with paraffin wax,the self-heating behavior of the treated catalyst is improved significantly and the catalyst activity remains quite well.The optimal passivation conditions are under a wax/catalyst mass ratio of 0.15,a passivation temperature of 40℃ and a treating time of 10-15min,besides,the treatment is simple and convenient.