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阜新烟煤、昭通褐煤和桦川泥煤超临界气体抽提抽出油的红外光谱表明,它们的相应馏分有着大致相似的分子结构,其主体是芳香体系。极性馏分中含有醚、酮和酚类化合物。在泥煤和褐煤的F_3馏分(正己烷可溶物在硅胶柱上的甲醇冲洗物)中含有酸类化合物。
Infrared spectra of Fuxin bituminous coal, Zhaotong lignite and Huachuan peat supercritical gas extraction oil show that their corresponding fractions have a roughly similar molecular structure and their main body is an aromatic system. Polar fractions contain ethers, ketones and phenolic compounds. The F_3 fraction of peat and lignite (methanol-n-hexane solubles on a silica gel column) contained acid compounds.