优化工艺条件降低催化裂化汽油烯烃含量

为满足环保要求，降低催化裂化汽油中的烯烃含量，北京燕山石油化工股份有限公司2Mt/a重油催化裂化装置进行了工艺条件的调整和优化。通过合理利用MGD技术，提高平衡剂活性，优化稳定塔的操作，改变终止剂及预提升介质等，将催化裂化汽油φ（烯烃）由67％左右降低到55％左右，收到了良好的效果；随着汽油烯烃含量的下降，RON下降了约1个单位，MON变化不大，汽油诱导期也无明显上升。为使用降烯烃催化剂创造了良好条件并积累了经验。

REDUCING FCC NAPHTHA CONTENT BY OPTIMIZATION OF OPERATING CONDITIONS

In order to reduce FCC naphtha olefin content to fulfil the requirement of environmental protection, modification and optimization of the operating conditions for No. 3 FCCU of Yanshan Petrochemical Corporation has been carried. As a result, the FCC naphtha olefin content decreased from 67% to 55% by utilizing MGD techno logy, increasing the equilibrium catalyst activity, adjusting operation of the stabilizer, changing the quenching media as well as altering the pre lifting dry gas to steam. The RON of the cracked naphtha declined about 1 unit, however, its MON and induction period showed no obvious changes. The modification and optimization of the operating conditions also created a good atmosphere and accumulated experiences for the utilization of olefin reducing catalyst