减压馏分油催化酯化脱酸的研究  

Deacidification of Vacuum Gas Oil by Catalytic Esterification

作　　者：何柏[1] 汪建康[2] 游晓兰 邱正阳[1] 毛锐 胡忠前 

机构地区：[1]重庆科技学院化学化工学院,重庆401331 [2]四川天一科技股份有限公司,四川成都610225 [3]中海沥青(四川)有限公司,四川泸州64600 [4]中国石油乌鲁木齐石化公司,新疆乌鲁木齐830019 [5]中国海油研究总院,北京100027

出　　处：《石油化工》2013年第11期1282-1285,共4页Petrochemical Technology

基　　金：重庆市教委科学技术研究项目(KJ131405)

摘　　要：采用浸渍法制备了ZnO/γ-Al2O3催化剂,并用其催化减压馏分油与甲醇进行酯化脱酸反应;考察了催化剂用量、甲醇用量、反应温度和反应时间对脱酸效果的影响,并对脱酸前后的馏分油进行了FTIR表征。实验结果表明,ZnO/γ-Al2O3催化剂具有较高的减压馏分油催化酯化脱酸活性。适宜的反应条件为:减压馏分油用量40 g,ZnO/γ-Al2O3催化剂用量为减压馏分油质量的1.25%,甲醇用量为减压馏分油质量的2.50%,反应温度260℃,反应时间1.00 h。在此条件下,脱酸率达到78%。FTIR表征结果显示,减压馏分油中的环烷酸与甲醇反应转化成酯类,达到了脱酸目的。与脱酸前的减压馏分油相比,脱酸后的精制馏分油酸值减小,运动黏度增加,闪点升高。ZnO/γ-Al2O3 catalyst was prepared by an impregnation method and applied in the deacidification of vacuum gas oil through the esterification with methanol. The effects of the catalyst dosage, methanol dosage, reaction temperature and reaction time on the deacidification were investigated. The vacuum gas oils before and after the deacidification were characterized by means of FTIR. The results showed that the ZnO/γ-Al2O3 exhibited good catalytic activity for the esterification. Under the suitable reaction conditions of vacuum gas oil dosage 40 g, the catalyst dosage 1.25%（w） （based on the vacuum gas oil, the same below）, methanol dosage 2.50%（w）, reaction temperature 260 ℃ and reaction time 1.00 h, the acid removal rate reached 78%. The FTIR results showed that naphthenic acids in the vacuum gas oil reacted with methanol into corresponding esters, so the acids were eliminated. Compared with the vacuum gas oil before the deacidification, the deacidified oil owned the advantages of low acid value, high kinematic viscosity and high flashing point.

关 键 词：减压馏分油 催化酯化反应 脱酸 甲醇 

分 类 号：TE626[石油与天然气工程—油气加工工程]