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The interaction of brown coal from the Sergeevskoe deposit with methanol under acid catalysis conditions was studied. The role of a catalyst in the processes occurring on methylation was demonstrated. The effect of intermolecular interactions on the solubility of alkylated coal was found. The individual and group compositions of the modified products were examined. It was found that the preliminary...
The comparative extraction of coal with organic solvents was performed. Humic acids were separated from solid residues. The yields, particle-size distributions, and chemical compositions of the resulting products were analyzed. It was demonstrated that brown-coal wax and humic fertilizers can potentially be obtained using coal from the Sergeevskoe deposit.
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