摘要
胜利褐煤经CS2-丙酮混合溶剂(V/V=1 1)萃取获得萃取物EM,EM在300℃的甲醇中热溶2 h获得热溶物ET.对EM和ET进行了气相色谱/质谱联用(GC/MS)分析,在EM中有43种GC/MS可检测组分,而在ET中检测到了132种有机化合物,其中包括32种在EM中未检测到的甲酯类化合物(MAs)和16种酚类化合物.分析了MAs和酚类化合物的形成机理,得出了胜利褐煤CS2-丙酮可溶大分子化合物中可能存在的4种结构单元.本文提供了一种研究煤中可溶大分子化合物的有效方法,弥补了GC/MS在检测大分子化合物时的不足.
Shengli lignite was extracted with CS2-acetone mixed solvent （1 ： 1 by volume） to obtain CS2- acetone soluble portion （EM）. Thermal dissolution of EM in methanol was carried out at 300 oC for 2 h to offer thermally soluble substance （ET）. Both EM and ET were analyzed by gas chromatography/mass spectrometry （GC/MS）. 43 and 132 organic components were identified by GC/MS in EM and ET respectively. 32 methyl esters （MEs） and 16 phenols are the most abundant compositions in ET,whereas were not detected in EM. Formation mechanisms of MEs and phenols, and 4 possible structure units of soluble macromolecular compounds in EM were put forward based on GC/MS results. An effective method to investigate soluble macromolecular compounds,which are difficult to be detected by GC/MS,was provided in this paper.
出处
《吉林化工学院学报》
CAS
2014年第3期30-34,共5页
Journal of Jilin Institute of Chemical Technology
基金
国家973计划项目(2011CB201302)
国家自然科学基金重点项目(20936007)
国家自然科学基金委员会创新研究群体科学基金(51221462)
关键词
超临界醇解
胜利褐煤
气相色谱
质谱联用分析
热溶
supercritical alcoholysis
shengli lignite
GC/MS analysis
thermal dissolution
