Abstract
The cocarbonization properties of the benzene-soluble fractions (BS) of several pitches with benzene-insoluble fractions (BI) of SRC pitches were studied, changing their mixing ratio in order to evaluate their compatibility for needle-coke formation; the smallest BS content required may reflect its cocarbonization ability to provide the carbonizing mixture with fusibility or suitable reactivity for this purpose. More than 90% of BS content was required for the BS—BI mixture of smallest compatibility, whereas only 10% was enough for the mixture of best compatibility. Ethylene tar BS of poor compatibility with solvent-refined-coal BI could be modified and improved for this purpose by catalytic reaction with aluminium chloride at 260 ° C, whereas ferric or cupric chloride failed. Based on the analytical study of BS and these results, the compatibility of pitch fractions is discussed from the viewpoint of pitch structure.
Published Version
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