Modified asphalt, modified bitumen prepared using the direct method of coal liquefaction residues and Its Application

The present invention discloses a modified asphalt, modified bitumen using a direct coal liquefaction residues preparation method and application. The method comprises the steps of: S1, direct coal liquefaction residues, to give the first extract and a first raffinate; S2, a first raffinate was processed, to obtain a second extract and a second raffinate ; and S3, the first extraction was subjected to a polymerization reaction to obtain a first modified asphalt, the second extraction was subjected to a polymerization reaction, to obtain a second modified asphalt. Different direct coal liquefaction solvent extraction residue was extracted twice, combined and solvent recycling solid-liquid separation, the resulting extract of the polymerization process, respectively, obtained in line with impregnating pitch, binder pitch change using a first standard asphalt modified asphalt and a second line with a high temperature asphalt binder, production of needle coke, pitch coke and raw material standard carbon fibers. The practical method to achieve a reasonable use of the depth of the coal liquefaction residues.