228. A new process of the isotropic pyro
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J.-Y. Lee; J.-H. Je
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Article
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1984
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Elsevier Science
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English
β 128 KB
Coals of increasing rank contain a mixture of solid fragments and particles which look liquid. The first ones are a fractions insoluble in boiling anthracene-oil, the others are /I fractions (soluble in anthracene-oil but insoluble in toluene). The content of fi fraction passes by a maximum as softe