塔河减压馏分油芳烃侧链研究

为了解减压馏分油中芳烃组分的侧链结构特点,将塔河原油的减压馏分油按照极性分成了轻芳烃、中芳烃和重芳烃组分,并采用仪器分析和钌离子催化氧化实验方法对其平均结构和侧链形态进行研究。结果表明,随着芳烃组分极性的增大,其烷基侧链平均碳链长度、平均相对分子质量减小,多环芳烃、杂原子含量增多。通过对钌离子催化氧化实验的水相和有机相产物的分析表明,3个芳烃亚组分的侧链以正构烷基为主,占80%左右,并且从轻芳烃、中芳烃到重芳烃,其侧链中所含碳数小于7的短烷基取代基依次增多,而碳数大于7的长烷基取代基依次减少,另外,异构烷基以低碳数单甲基异构烷基为主。

STUDY ON SIDE CHAINS OF AROMATICS IN TAHE VACUUM GAS OIL

In order to elucidate the characterization of side chains in aromatics of vacuum gas oil, Tahe VGO was separated into light, medium and heavy aromatic fractions according to the polarity, then the average composition of aromatics and the side chains were investigated by instruments and ruthenium ion catalyzed oxidation reaction. The results show that carbon number and average molecular weight of n-alkyl chain decrease, while the polycyclic aromatics, heteroatom aromatics increase from light to heavy aromatics. By analyzing the water phase and organic phase of ruthenium ion catalyzed oxidation reaction, it is found that about 80% of side chain of the three aromatics fractions is normal alkyl. The short side chain of C1~C7 is increased as fractions become heavier, but the amount of the side chain longer than C7 is on the contrary. In addition, most of isomerized alkyl side chains are the side chain with single methyl.