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Study of Constituents of fractionated extraction from Datong Coal

Journal of China University of Mining and Technology 2005年第4期15卷 299-304页

作者： WANG Xiao-hua WEI Xian-yong Department of Chemistry and Chemical Engineering Xi＇an University of Science and Technology Xi＇an Shaanxi 710054 China School of Chemical Engineering and Technology China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China

Datong coal was extracted with CS2, n-hexane, benzene, methanol, acetone, tetrahydro-furan（THF） and THF/methanol（1：3,v/v） mixed solvent sequentially. The extracts were analyzed with GC/MS. It is presented that group seperation of soluble organic compounds in the coal can be achieved by fractionated extraction using different solvents. The results show that CS2 was effective for extracting arenes from the coal sample, n-Hexane extractable fraction from Datong coal mainly consists of n-alkanes. A great variety of oxygen-containing compounds are dominant in the components of methanol-soluble fraction. Acyclic isoprenoids, pentecyclic triterpanes and a series of cyclohexanes with long-chain alkyl-substitutes are detected in acetone-soluble fraction. Dicyclic aramatic hydrocarbons are identified in benzene-soluble fraction and 4-6 cyclic condensed aramatic hydrocarbons are identified in THF-soluble fraction. The molecular structures detection of 1,2-dichlorobenzene, 2,4-dibromophnol, 2,4,6-tribromophenol and 4-chlorobenzophenone firstly provide information for existence form of bromine and chlorine in coal.

关键词： coal solvent fractionated extraction chemical constituent GC/MS

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GC/MS analyses of fractionated extraction of Shenfu coal with CS2,n-hexane,benzene

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Journal of Coal Science & Engineering(China) 2008年第4期14卷 672-674页

作者：王晓华魏贤勇 Department of Chemistry and Chemical Engineering Xi'an University of Science and TechnologyXi'an 710054China School of Chemical Engineering China University of Mining and TechnologyXuzhou 221008China

Shenfu coal was extracted with 0S2, n-hexane, benzene sequentially. The extracts were analyzed with GC/MS. It is presented that group seperation of soluble organic compounds in the coal can be achieved by fractionated extraction using different solvents. Main components in CS2 soluble fraction from Shenfu coal are alkyl-substituted arenes. Aliphatic hydrocarbons are overwhelmingly predominant in n-hexane-soluble fraction. Dito tricyclic aramatic hydrocarbons are identified in benzene-soluble fraction. The molecular structures detection of 2, 4, 6-trichlorobenzenamine and 3, 3＇, 4, 4＇, 5, 5＇-hexachloro-1, 1＇- biphenyl and 2-chlorocyclohexanol firstly provide information for existence form of chlorine in coal.

关键词： solvent fractionated extraction chemical constituent GC/MS

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