| 摘要 |
Phenols and tar-bases are separated from coal-tar oils and hydrogenation products containing hydrocarbons by extracting with an aqueous solution of alkali phenolate followed by an oxygen-containing organic solvent which may be an ether, ester or ketone boiling below 180 DEG C., and partially immiscible with the p phenolate, which removes the phenols which may then be separated by distillation. The nitrogeneous bases may be extracted from the residues with acids. Hydrocarbon oils may be separated by preceding the treatment with oxygen-containing solvent with an extraction by a paraffin solvent of boiling-point below that of the hydrocarbon oil. Degrees of extraction by various solvents are shown on graphs. Processes of extraction of phenols from hydrocarbon oils and nitrogen bases from light hydrogenation and coal-tar oils, are described. The nitrogeneous bases include aniline, toluidines, pyridines and higher tar bases.
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