A series of co‐pyrolysis tests of naphtha and methyl cyclohexane were carried out to study the products yield changes in pyrolysis of different proportions and at different tempera‐tures .The result showed that comparing with the naphtha pyrolysis alone ,the yield of co‐pyrol‐ysis ethylene decreased w hile the yield of butadiene substantially increased .Relatively high tem‐peratures are benefit for high butadiene yield while smaller drop of ethylene yield .The co‐pyroly‐sis of naphtha and methyl cyclohexane can optimize the pyrolysis gas product distribution and im‐prove the comprehensive added value of products .It can fully rely on existing ethylene pyrolysis unit and subsequent separation system .Meanwhile ,co‐pyrolysis has the advantages of high feasi‐bility ,lower investment and stable operation ,which can meet the requirements of industrial pro‐duction .%开展了一系列石脑油与甲基环己烷共裂解试验，对比分析了不同比例、不同温度下产物收率的变化。结果表明：与石脑油单独裂解相比，共裂解乙烯收率降低，丁二烯收率大幅度提高。在相对较高的温度下进行共裂解，可得到高收率丁二烯，同时，乙烯收率降幅较小。石脑油与甲基环己烷共裂解优化了裂解气相产物分布，提高了产物的综合附加值，可完全依托现有乙烯裂解装置和后分离系统多产丁二烯，可行度高且节省投资，装置操作平稳，可满足工业化生产的要求。
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