为考察风化煤黄腐酸(FA)的溶解机理,提出了一个溶剂体系。通过对巩县风化煤FA溶解能力实验和分级溶解,发现溶剂对FA的溶解能力取决于溶剂形成氢键能力的溶解度参数δ_a,即FA的溶解度随δ_a值的增加而增加。用化学分析,IR,~(13)C NMR谱对各级分进行结构表征,结果表明:芳香度、醌基含量等呈现出的规律性变化与形成氢键为主导因素的溶解机理相一致。 In order to investigate the dissolution mechanism of fulvic acid (FA) in weathered coal, a solvent system was proposed. Through the experiment and graded dissolution of FA in coal in Gongxian County, it is found that the solubility of FA to FA depends on the solubility parameter δ_a of hydrogen bond formation ability, that is, the solubility of FA increases with the increase of δ_a. The chemical structure, IR and ~ (13) C NMR spectra were used to characterize the structures of the fractions. The results showed that the regular changes of aromaticity and quinone content were consistent with the dissolution mechanism dominated by hydrogen bonding.