焦化煤油馏分络合萃取工艺精制α-烯烃工艺研究焦化煤油馏分络合萃取工艺精制α-烯烃工艺研究

Study on refiningα-olefin by complex extraction process of coking kerosene fraction

以某炼化厂的焦化煤油馏分为原料,利用络合萃取工艺精制原料油中的α-烯烃和烷烃等物质。考察了不同络合萃取剂及温度等操作条件对精制的影响,并对其进行表征分析。结果表明:选用Ag^(+)试剂1-N-甲基吡咯烷酮(NMP)为络合萃取剂,在萃取温度为120℃、剂油质量比为0.5∶1、采用实验室自制吸附剂的条件下,精制效果最佳。通过实验得到的精制产品油收率为83.45%;经过提纯后的α-烯烃质量分数可以达到70.07%;硫脱除率可以达到29.73%,氮脱除率可以达到66.09%;精制油的碳数分布主要在C_(8)~C_(14)之间,FT-IR表征结果表明,焦化煤油馏分中含有的官能团主要为O-H、C-H及RCH=CH_(2),得到的精制油可做聚合反应生成PAO。

Taking the coking kerosene fraction of a refinery as the refined raw oil,the complex extraction process was used to refine theα-olefins and alkanes in the raw oil.The effects of different complex extraction agents and operating conditions such as temperature were investigated,and the characterization analysis was performed.The results showed that Ag^(+)reagent 1-N-methylpyrrolidone(NMP)was selected as the complex extraction agents,and the extraction temperature was 120℃,the mass ratio of agent to oil was 0.5∶1,and the operating conditions of laboratory-made adsorbent were used to obtain the best refine effect.The yield of refined product oil obtained through experiments was 83.45%.The mass fraction of purifiedα-olefin was 70.07%.The removal rate of sulfur could reach 29.73%,and the removal rate of nitrogen could reach 66.09%.The carbon number distribution of refined oil was mainly between C_(8)-C_(14).The FT-IR characterization results showed that the functional groups contained in the coking kerosene fraction were mainly O-H,C-H and RCH=CH_(2),and the obtained refined oil could be used for polyreaction to generate PAO.