Further work on resinenes is reported including hydrolysis, bromination, thermal decomposition, dehydrogenation, hydrogenation, and alk line permanganate oxidation. The resinenes give neutral and phenolic products on hydrolysis. Dehydrogenation with selenium gives neutral and phenolic products. Oxidation gives a benzenoid residue including benzene hexacarboxylic acid in addition to more complex water soluble acids. The significance of these results is discussed.
The inorganic constituents of coals are bricfly reviewed and their subsequent history during combustion and carbonization is considered. The cxamination is reported of the zinc‐pyridine complex obtained from a free carbon sample by extraction with water. Examination for other elements is described and the presence of lead, iron, cobalt, manganese and others indicated. The form in which these elements are present is discussed.
\Vork on the osidation of carbonaceous materials with alkalinc potassium permanganate is briefly outlincd and the experimental step-wise osidation of free carbon is described. The course of reaction as interpreted from rhesc results is indicated. Bulk OXid3tion of free carbon and the nature of the products are reported. In the steam-volatile fraction, formic, acetic and butyric acids have been identified. The water-soluble non-volatile acids and their methyl esters have been fractionated. Oxalic, succinic, phrhalic, tercphthalic and mellitic acids have been identified in the oxidation products. The major portion of the acids, however, was found to be more complex, probably having polynuclcar structures.Oxidation of C , and C, shows that C, is more highly condensed than Cz and resembles graphite and coke in its properties.
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