:GPC. Separation of Solvent-fractionation Products from Reductive Methylation Products

概要

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In cases of carring out investigation on the solubilization mechanism of coals, and of also making highly utilization of soluble products of coals as fuel and chemicals, it is desirable for us to obtain more detailed information about soluble product from coal. Structural parameters and others of six solvent-fractionation products which were fractionated by GPC, were examined and compared. Asphaltenes prepared from methylated Yubari and Taiheiyo coals contained components of number average molecular weight having 20400 and 32600, respectively. As to Taiheiyo coal, solvent-fractionation products differed markedly with regard to their molecular weights (MW. range, 390-47600), but HS (nexane sol.), CS (Cyclohexane sol.), ES (Ethanol sol.), AS (Acetone sol.), EAS (Ethyl acetate sol.), and DS (Dioxane sol.) nevertheless resembled closely one another in structural unit weight, M (Us), and CS, ES, AS, EAS, and DS in the degree of condensation in aromatic ring, Hau/Ca. In general CS, AS, EAS, and DS of Taiheiyo coal consisted of 1-2 aromatic ring with aliphatic side chain carbons, whereas those of Yubari coal, 2-3 aromatic rings with 5-9 aliphatic side chain carbons. Moreover structural characteristics of each solvent-fractionation product were discussed.
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