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石油馏分裂解制乙烯时副产轻焦油中(C_6—C_8馏份)含有丰富的苯、甲苯、二甲苯等芳烃。随着我国石油化工的发展,开展由石油馏分裂解副产轻焦油中回收芳烃的研究,对扩大芳烃来源,减少环境污染等都具有现实意义。工艺流程是采用二甲基亚砜作溶剂,抽取轻焦油中芳烃,以C_5烷烃为反抽提剂,经过蒸馏,达到芳烃分离的目的。为了配合中间试验,我们建立了轻焦油芳烃的色谱分析。芳烃的分析有许多报导,分析的工具和方法也很多,如吸收光谱法、质谱法、毛细管色谱法等。限于仪器条件,我们采用了填充色谱法,并针对轻焦油组分复杂,萃取相中含有强极性的水和强极性高沸点的二甲基亚砜,我们选
Petroleum cracking by-product of ethylene light by-product light tar (C_6-C_8 fraction) is rich in benzene, toluene, xylene and other aromatic hydrocarbons. With the development of petrochemical industry in our country, the research on the recovery of aromatics from the light tar by-product cracking of petroleum fractions has practical significance for expanding the sources of aromatics and reducing the environmental pollution. Process is the use of dimethyl sulfoxide as a solvent extraction of light tar oil aromatics, C_5 alkane as an anti-extraction agent, after distillation, to achieve the purpose of aromatic separation. In conjunction with the pilot test, we have established a chromatographic analysis of light tar aromatic hydrocarbons. Aromatic analysis has many reports, analysis tools and methods are many, such as absorption spectrometry, mass spectrometry, capillary chromatography and so on. Due to the instrumental conditions, we used Fill Chromatography, and for the complex composition of light tar, the extract phase contains strongly polar water and strongly polar high boiling point dimethylsulfoxide. We chose