CAJ | 학술논문

以中国石油化工股份有限公司上海石油化工研究院开发的 SEB -08稀乙烯法制乙苯烷基化催化剂为基础，研究生产过程中稀乙烯法制乙苯的原料可能携带的工艺杂质，如甲苯、非芳烃、硫化氢、水和碱性物质等对烷基化反应的影响。结果表明：（1）循环苯中甲苯的存在使烷基化反应产物中的二甲苯含量上升，影响乙苯产品质量；（2）丙烯对烷基化反应产物中的二甲苯含量影响不大，但丙苯含量大幅上升；（3）正己烷、环己烷、正戊烷和1-戊烯等重质非芳烃使烷基化反应产物中的二甲苯以及重质芳烃含量有不同程度上升；（4）催化干气携带水会对乙烯转化率有一定影响，水体积分数超过1000×10-6时，乙烯转化率下降明显，催化剂失活速率加快；（5）以乙醇胺为代表的碱性物质对烷基化反应影响最明显，由于催化剂活性中心为酸性，碱性物质引起催化剂不可逆失活；（6）硫化氢含量增加，对催化剂性能以及产品质量影响较小，但对设备及管道的腐蚀程度增加。通过研究工艺杂质对烷基化反应的影响，可为正确判断现有干气制乙苯装置生产中烷基化反应产物组成变化提供依据，为确保装置长周期稳定运行提供参考。
이중국석유화공고빈유한공사상해석유화공연구원개발적 SEB -08희을희법제을분완기화최화제위기출，연구생산과정중희을희법제을분적원료가능휴대적공예잡질，여갑분、비방경、류화경、수화감성물질등대완기화반응적영향。결과표명：（1）순배분중갑분적존재사완기화반응산물중적이갑분함량상승，영향을분산품질량；（2）병희대완기화반응산물중적이갑분함량영향불대，단병분함량대폭상승；（3）정기완、배기완、정무완화1-무희등중질비방경사완기화반응산물중적이갑분이급중질방경함량유불동정도상승；（4）최화간기휴대수회대을희전화솔유일정영향，수체적분수초과1000×10-6시，을희전화솔하강명현，최화제실활속솔가쾌；（5）이을순알위대표적감성물질대완기화반응영향최명현，유우최화제활성중심위산성，감성물질인기최화제불가역실활；（6）류화경함량증가，대최화제성능이급산품질량영향교소，단대설비급관도적부식정도증가。통과연구공예잡질대완기화반응적영향，가위정학판단현유간기제을분장치생산중완기화반응산물조성변화제공의거，위학보장치장주기은정운행제공삼고。
Based on SEB-08 catalyst for alkylation of benzene with dilute ethylene to ethylbenzene,devel-oped by Shanghai Research Institute of Petrochemical of Sinopec,the influence of the impurities in the raw material,such as toluene,non-aromatics,hydrogen sulfide,water and alkaline substances,on the alkylation reaction of dilute ethylene with benzene was investigated. The experimental results showed that:(1)the toluene in the recycling benzene increased the content of xylene in the products,which affected the quality of ethylbenzene;(2)propylene in FCC off-gas had little influenc on the contents of xylene in the products,but the content of propylbenzene increased significantly;(3)the heavy non-aromatics such as n-hexane,cyclohexane,n-pentane and 1-pentene,increased the contents of xylene and heavy aromatics in the products;(4)water in FCC off-gas had certain influence on the activity of the catalyst. When the water content was over 1 000 × 10 - 6 ,ethylene conversion decreased significantly and the decreasing rate of catalytic activity was accelerated;(5)the alkaline substance(ethanolamine)showed the greatest effect on the catalytic activity,because the active center of the catalysts were acidic sites,the adsorption of alka-line substances on the catalyst was irreversible;(6)the enhancement of hydrogen sulfide contents had little effect on catalytic performance of the catalyst and the quality of ethylbezene product,but increased the corrosion of the equipment and the pipeline. By researching the effect of impurities in raw material on the alkylation reaction,the changes of the product composition in alkylation reaction could be judged correctly,which could provide useful reference to ensure the long term stable running of the plant.