基于煤岩分析、仪器分析及有机溶剂抽提等方法，对焦坪煤进行了系统的煤岩、煤质研究。
This paper deals with petrographic characteristics and coal qualities of Jiaoping coal by means of coal petrologic, instrumental analytical and organic solution extraction methods, and so on.
二甲基甲酰胺（DMF）是一种重要的有机溶剂，被广泛应用于合成革生产、聚丙烯腈抽丝、丁二烯抽提等工艺中。
Dimethylformamide(DMF)is widely used in leather industry, polyacrylonitrile fibre spinning and butadiene extraction craft as an important organic solvent.
卤素阴离子能够同煤分子通过酸碱作用而强烈缔合，从而破坏了煤分子的缔合结构，提高了煤在有机溶剂中的抽提率。
Halogenide anions can associate strongly with coal molecules by acid -base interactions, and destruct the associative structure of coal enhancing the extraction yields of coal in organic solvents.
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