宝明页岩柴油碱性氮化物的梯度富集及GC-MS分析

利用溶剂萃取和柱色谱等技术浓缩分离新疆宝明页岩油柴油馏分中的碱性氮化物。以宝明页岩柴油为原料,经糠醛溶剂精制,初步得到富集碱性氮化物的抽出油。以抽出油为深度富集碱性氮化物的原料,采用柱色谱等分离方法,从抽出油中分离得到碱性氮化物。利用傅立叶变换红外光谱仪(FT-IR)和气相色谱-质谱联用仪(GC-MS)分别对富集的碱性氮化物进行官能团检测和定性、定量分析。结果表明:新疆宝明页岩油柴油馏分中的碱性氮化物经溶剂精制和柱色谱等分离方法梯度富集后,碱性氮化物的质量分数由抽出油的12.08%提高到最终产物的69.48%,并在富集分离的产物中鉴定出60种碱性氮化物,其中主要为苯胺类、喹啉类和吡啶类化合物,各占25.85%,23.56%和16.52%。

Gradient Enrichment of Basic Nitrogen Compounds in Diesel Distillated from Bao Ming Shale Oil and Their Analysis by GC-MS Method

Basic nitrogen compounds in diesel distillated from Xinjiang Baoming shale oil were concentrated by methods of solvent extraction refining and column chromatography,etc.The solvent refining method was used to separate diesel distillated from Xinjiang Baoming shale oil into extract oil.The solvent in the method of solvent extraction refining was furfural.The basic nitrogen compounds in the extract oil were concentrated preliminarily.Basic nitrogen compounds were obtained from the extract oil by column chromatography,and analyzed by Fourier transform infrared spectroscopy (FT-IR) and gas chromatography-mass spectrometry(GC-MS).The results showed that basic nitrogen compounds in diesel distillated from Xinjiang Baoming shale oil were gradiently concentrated by methods of solvent refining and column chromatography.The percentage content of basic nitrogen compounds was increased from 12.08％ in the extract oil to 69.48％ in the product of enrichment,and 60 kinds of basic nitrogen compounds in the concentrated products were identified.The main components in the basic nitrogen compounds were aniline,quinoline and pyridine compounds,and their percentage contents were 25.85％,23.56％ and 16.52％,respectively.