The extracts were extracted with acetone under ultrasonic irradiation and the composition was analyzed with GC/MS.The raw coal and extracted residue was analyzed with FTIR.

• 利用GC/MS分析研究了其萃取物的族组成,对其原煤及萃余煤进行了红外光谱分析,并对萃取动力学特征进行了探讨。