煤焦油和石油基柴油馏分中含氮化合物的分离鉴定

对两种煤焦油柴油馏分和催化裂化柴油、焦化柴油、直馏柴油中的含氮化合物做了鉴定分析。采用硅胶柱分离富集5种柴油中的非碱性含氮化合物，酸萃取法萃取碱性含氮化合物，利用GC/MS分离定性。结果表明：煤焦油柴油馏分中非碱性含氮化合物主要是咔唑和吲哚类化合物，碱性含氮化合物以喹啉、吡啶和苯胺类为主;催化裂化柴油以咔唑和吲哚类非碱性含氮化合物为主；焦化柴油以吡啶和喹啉类碱性含氮化合物为主；直馏柴油中主要是咔唑类非碱性含氮化合物，还有少量的喹啉和苯胺类碱性含氮化合物。煤焦油柴油馏分和焦化柴油以碱性含氮化合物为主，催化裂化柴油和直馏柴油以非碱性含氮化合物为主，煤焦油柴油馏分中的碱性含氮化合物种类及含量远高于石油馏分。

SEPARATION AND IDENTIFICATION OF NITROGEN COMPOUNDS IN DIESEL FRACTION OF COAL TAR AND PETROLEUM

In this paper, nitrogen compounds in two kinds of coal tar diesel fraction and three kinds of diesel（FCC diesel, coking diesel and straight-run diesel）were separated and identified. The non-basic nitrogen compounds was separated by silicagel column and the basic nitrogen compounds was extracted from diesel by HCL, then the separated nitrogen compounds were identified by using GC/MS. The results show that in two coal tar diesel fractions, non-basic nitrogen compounds including carbazole and indole as well as basic nitrogen compounds including quinoline, pyridine and aniline are the main nitrogen compounds. The basic nitrogen compounds including pyridine and quinoline are given priority in coking diesel. Straight-run diesel mainly contains non-basic nitrogen compounds including carbazole and a small amount of basic nitrogen compounds including quinoline and aniline. The basic nitrogen compounds are mainly in coal tar diesel fraction and coking diesel, and the non-basic nitrogen compounds are mainly in FCC diesel and straight-run diesel. The kinds and amount of basic nitrogen compounds in coal tar diesel is much more than that in petroleum diesel.