Production of Isotropic Coal from Shale-Waste Oil

Resumo

Abstract—Isotropic coke is needed for the production of fine-grain graphite, which is employed throughout industry. In turn, isotropic coke may be produced from the residues obtained in atmospheric distillation of shale tar, after their thermal oxidation. The formation of isotropic coke by the carbonization of such thermally oxidized residues was considered in [1–3]. In the present work, the production of isotropic coke from a different source is considered—specifically, from shale-waste oil (SWO), which is the hydrocarbon residue obtained on washing the polluted wastes from shale-tar processing. In terms of mesogenic properties, shale-waste oil resembles the atmospheric distillation residues of shale tar. This paper shows that undesirable impurities may be removed from shale-waste oil and that the isotropic coke derived from the resulting oil meets the requirements for the production of fine-grain graphite. In this paper the next denotations are made: isooctane-soluble fraction is denoted as gamma fraction, isooctane-insoluble-toluene-soluble is denoted as beta fraction, toluene-insoluble-quinoline-soluble is denoted as alpha fraction, the fraction insoluble in quinoline, pyridine and carbon disulfide is denoted as alpha-1 fraction.