Research progress on preparation technology of impregnating pitch for carbon industry
Impregnating pitch is commonly used as a dense supplement in carbon industry,and its own properties greatly affect the final impregnation effect of the products.Therefore,based on the impregnation mechanism of carbon materials,the internal relationship of macroscopic properties such as softening point,coking value,quinoline insoluble(QI)and toluene insoluble(TI)is briefly described.The properties of coal tar pitch,A-240 petroleum pitch,catalytic cracking slurry and ethylene tar are compared comprehensively.The research status,modification methods and development direction of impregnating pitch at home and abroad are reviewed.It is indicated that petroleum impregnated pitch is the future development trend.
Impregnating pitchtoluene insolublequinoline insolublecoal tar pitchpetroleum pitch
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