中东常压渣油及其超临界流体萃取分馏馏分中极性化合物的分子表征  

Characterization of Polar Compounds in Middle East Atmospheric Residue and its Supercritical Fluid Extraction Fractionation Subfractions

作　　者：刘美[1] 张成[2] 赵德智[1] 袁胜华[2] 段林海[1] 

机构地区：[1]辽宁石油化工大学化学化工与环境学部,辽宁抚顺113001 [2]中国石化抚顺石油化工研究院,辽宁抚顺113001

出　　处：《分析科学学报》2018年第1期67-72,共6页Journal of Analytical Science

基　　金：国家自然科学基金(No.21476101);辽宁省科技厅博士科研启动项目(No.20161327);中海油重大项目(No.HL00FW(P)2014-0005)

摘　　要：实验采用超临界流体萃取分馏装置,按照分子大小和极性强弱将中质原油常压渣油进行多级萃取分馏,获得4个宽馏分和1个萃余残渣。获得原料和宽馏分的密度、粘度等基本物化性质;高温模拟蒸馏及凝胶渗透色谱获得沸程分布及烃类分子分布信息;正、负离子模式下的电喷雾电离源傅立叶变换离子回旋共振质谱分析原料和4个宽馏分中所包含的极性化合物的分子组成。结果表明,各个馏分中相对丰度最高的均为N1类化合物。馏分由轻到重,N1、N1O1、N1S1等类型含氮化合物的DBE和碳数分布范围变宽,且馏分越重,分子缩合度越高,碳数越大,分布越均匀。Most of the processed crude oil is processed from the Middle East. In order to facilitate further processing, it is very important to understand the components of the crude oil, especially the characterization of the residual compounds. Saudi Arabia intermediate atmospheric residue was subjected to supercritical fluid extraction fractionation（SFEF）and separated into 4 extractable fractions and an unextractable end-cut. The basic physicochemical properties were obtained by routine analysis means. The polar compounds in atmospheric residue and its extractable SFEF subfractions were characterized by negative- and positive-ion electrospray ionization and Fourier transform ion cyclotron resonance mass spectrometry. The results showed that the highest relative abundance of each subfractions was N1 class species. As the fractions become heavier, the DBE and carbon number distribution of N-containing compounds（such as N1, N^O1 , N1S1 class） get wider. Meanwhile, the heavier subfraction is, the higher condensation degree, and the larger carbon number is, the more uniform distribution.

关 键 词：超临界流体萃取分馏 电喷雾电离 傅立叶变换离子回旋共振质谱 极性化合物 含氮化合物 

分 类 号：O657[理学—分析化学]