PROCESS FOR REFINING COAL-BASED HEAVY OILS

摘要

A coal-based heavy oil is refined so as to remove quinoline insolubles and provide a hydrocarbon product suitable for making carbon stocks by heating to remove the volatile components which have boiling points ranging from the initial boiling point of the heavy oil to up to at least 200.degree.C and at most 270.degree.C, thereby leaving a residual coal-based heavy oil, the residual coal-based heavy oil is mixed with a ketone-type solvent having a boiling point less than 200.degree.C to form an insoluble precipitate (including quinoline insolubles) and a supernatent, the supernatent is treated to recover the ketone-type solvent, and the remaining hydrocarbon mixture is easily processed by vacuum distillation to produce a hydrocarbon product suitable for making carbon stocks.