【摘要】 为了揭示煤中可溶组分的存在方式和溶出行为,分别以石油醚和CS2为溶剂对淮北煤进行了按时间段分次取样的两级索氏萃取,并采用FTIR对萃取物进行了定性和定量分析。结果表明,可萃取组分的溶出具有时序性和阶段性特点;萃取物重要基团FTIR吸收峰随时间变化均呈波型曲线规律;石油醚可萃取组分中存在较多较短链的脂肪族组分和两部分特定链长的-OH(-NH)类物质;CS2可萃取物中则有两种特定链长的脂肪族组分和一种特定链长的-OH(-NH)类物质。更多还原

【Abstract】 To reveal the existing state and dissolution behavior of the solvent-soluble fractions in the coal,Huaibei coal was extracted with petroleum ether and then with CS2 using fractional sample in the Soxhlet extractor.FTIR analysis of the extracts was carried out qualitatively and quantitatively.The results show that the content of soluble fractions is more than that of petroleum ether-soluble fractions.The characteristics of CS2-soluble fractions are sequential and periodical changes.FTIR absorption peaks of some important radicals in the extracts show wave curve against time.Two series of-OH(-NH) containing components of special chain-length and many short-chain aliphatic components exist in the petroleum ether-soluble fractions.There are two series of aliphatic components of special chain-length and one series of-OH(-NH) containing components of special chain-length exist in the CS2-soluble fractions.更多还原