Abstract: A dividing wall column of 8.3 m trial equipment was designed and constructed with a column bottom capacity of 10L for the separation of pyrolysis gasoline. Impact of side locatione，side draw and liquid distribution ratio on separation were investigated. The optimum conditions were found as：material feed rate 6 L/h，feed temperature 56 ℃，top product 1.1 L/h，reflux rate 1.5 L/h，liquid distribution ratio 2:1，side draw 3.6 L/h. Under these conditions，the mass fraction of C5 in the top product could reach to higher than 98.5%. The mass fraction of C5 in the side product was less than 2%. This novel process can shorten the flowsheet and reduce the equipment investment.

摘要： 自制一套塔高8.3 m可拆装10 L釜分隔壁精馏塔小试装置分离裂解汽油，考察不同的出料位置、侧线采出量、液体分配比等参数对分离效果的影响。得出较佳工艺条件为：进料速度6 L/h，进料温度56 ℃，塔顶出料1.1L/h，回流量为1.5 L/h，液体分配比（主:副）为2:1及侧线出料量3.6 L/h。在此条件下，塔顶C5的质量分数达到98.5%以上，侧线C5的质量分数小于2%，满足分离要求。该工艺缩短了流程，减少了设备投资。