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- W2031582506 abstract "Abstract Two coals (87.5%C and 91.5%C) were reduced at room temperature using hexamethylphosphoramide-Na-t-butanol. Nearly 80% of the coals could dissolve after reducing the insoluble part in pyridine once or three times. The reaction was repeated two or three times for these pyridine extracts. It was observed from infra-red or nuclear magnetic resonance spectroscopy that the reduction proceeded with the repeat of the reaction. From the structural analysis the total ring number (aromatic and naphthenic) per structural unit of 87.5%C coal was estimated to be 4–6 and that of 91.5%C coal to be 7–14." @default.
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- W2031582506 date "1981-10-01" @default.
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- W2031582506 title "Reduction of coal with hexamethylphosphoramide-Na-t-BuOH" @default.
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- W2031582506 doi "https://doi.org/10.1016/0378-3820(81)90025-4" @default.
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