煤焦油中甲苯不溶物的性质和组成分析

oluene insoluble materials in coal tar are harmful to the hydrogenation equipment, catalysts and the quality of products. So they should be separated from coal tar before hydro-upgrading. The compositions and structures of toluene insoluble materials are analyzed by elemental analysis, scanning electron microscopy, X-ray Diffraction analyses, Fourier transform infrared and so on. The results show that more than 97% toluene insoluble materials particles are less than 21.06μm in diameter, which are irregular in shape and dispersed stably in coal tar. Toluene insoluble materials are mainly composed of carbonaceous organic compositions which are richer in oxygen and are rich in some mental elements Al, Si, Ca, Ti, Fe. The organic components are some products which are highly condensed from multicomponent aromatic ring compounds. The inorganic components are mainly of coal, ash, carbon and mineral particles. The total content of carbon and oxygen of toluene insoluble materials solid surface is more than 90%. The carbon is mainly in the form of hydrocarbon and phenol carbon, ether carbon. The oxygen is mainly in the form of phenolic hydroxyl group and ether oxygen bonds.