MIP系列技术降低汽油苯含量的先进性及理论分析  

ANALYSIS OF MIP SERIAL TECHNOLOGIES FOR REDUCING BENZENE CONTENT OF FCC NAPHTHA

作　　者：许友好[1] 龚剑洪[1] 程从礼[1] 魏晓丽[1] 

机构地区：[1]石油化工科学研究院,北京100083

出　　处：《石油炼制与化工》2008年第1期39-43,共5页Petroleum Processing and Petrochemicals

基　　金：国家重点基础研究基金资助项目(2006CB202500)

摘　　要：对已运行的MIP装置汽油苯含量进行统计和分析,数据表明,MIP系列技术的汽油苯含量低于1.0%,可满足我国车用汽油质量指标要求,而FDFCC-Ⅲ,ARGG,DCC-Ⅰ的汽油苯含量分别为1.36%,1.64%,2.11%。通过对这些工艺技术的工业应用数据进行分析,发现在催化裂化条件下既存在着烷基苯发生裂化生成苯和小分子烯烃的反应,也存在着苯和小分子烯烃的烷基化反应,MIP汽油苯含量降低的原因在于MIP工艺第二反应区的反应条件有利于汽油中的苯和烯烃进行烷基化反应,从而减少了汽油苯含量;而其它多产丙烯技术则有利于烷基苯发生裂化反应,生成苯和小分子烯烃,从而增加了汽油苯含量。The benzene contents of naphtha from running MIP units were collected and analyzed in this paper. The statistic data indicated that the benzene contents of naphtha from MIP units were below 1.0 %, which met the requirement of gasoline standard. However, the benzene contents of naphtha from units of FDFCC-Ⅲ ,ARGG and DCC-Ⅰ were 1.36% ,1.64% and 2.11% ,respectively. By analyzing these industrial data,it could be concluded that alkylbenzene was cracked into benzene and small olefins under the operation conditions,and simultaneously the alkylation reactions of benzene and small olefins took place to form alkylbenzene. The reasons of MIP naphtha having low benzene content were discussed. It seemed that the reaction conditions of the 2nd reaction zone were in favor of the alkylation reaction between benzene and olefins. While other technologies for enhancing propylene production were in favor of cracking alkylbenzene to form benzene and small olefins,which led to higher benzene content of naphtha.

关 键 词：汽油料 苯 烯烃 烷基化反应 裂化反应 

分 类 号：TE624.5[石油与天然气工程—油气加工工程]