【摘要】 利用有机溶剂对兖州煤中小分子化合物进行抽提,在抽提14h以上时抽提率基本不再变化,为12.26%左右.用凝胶色谱法对兖州煤中小分子化合物的相对分子质量进行测定,发现相对分子质量在几十到上万不等,但是主要集中在Mw=400左右.最后采用比重瓶法,利用混合液体密度公式测得小分子化合物密度为1.192 4g/cm3.更多还原

【Abstract】 Organic solvent was used to extract small molecular compounds of the Yanzhou coal,extraction rate basically no longer changed when approaching 12.26% after extraction of14 h.The molecular weight of small molecule compounds of Yanzhou coal was determined by gel permeation chromatography,the molecular weight ranging from dozens to tens of thousands,but mainly concentrated about M=400g/mol.Finally by pycnometer method,using the mixed liquid density formula method,small molecule compounds density was measured,that is 1.192 4g/cm3.更多还原