GC-MS分析低温煤焦油酸性组分及碱性组分

摘要

采用酸碱溶液萃取的方法将新疆低温煤焦油分离为酸性、碱性及中性组分.利用GC-MS色质联用仪及元素分析仪,对酸性组分和碱性组分的化学组成和结构进行定性定量分析.结果表明,新疆低温煤焦油酸性组分中共检测出质量分数不小于0.1％的化合物共74种,且全部为含氧化合物,其质量分数为95.4％；大部分为苯酚、C3-C4烷基酚、萘酚和茚酚.碱性组分中检测出质量分数不小于0.1％的化合物共57种,含氮化合物有57种,其质量分数为65.5％,主要由苯胺类、喹啉类、吲哚、吡啶、吖啶等氮杂环化合物组成.%Through the separation of the group composition by acid-base extract,Xinjiang low-temperature coal tar has been divided into three different groups including acid-composition,base-composition and neutral-composition.The acid-extract and base-extract were analyzed with GC/MS and elemental analysis.The results show that 74 kinds of compounds are analyzed from acid composition.All of them are oxygenated compounds and the content is 95.4％.The main compounds in acidcomposition are low-rank phenols,C3-C4 alkyl phenols,naphthols and indenols.57 kinds of compounds are in basecomposition and 55 nitrogenous compounds in them.The content of nitrogenous compounds is 65.5％,mainly are phenylamine,quinoline,benzazole,pyridine and acridine.