A method for producing a mesophase pitch by hydrogenation of high temperature coal tar

摘要

A method for producing mesophase pitch from high-temperature coal tar, which removes salt and quinoline insolubles from high-temperature coal tar, obtains decant oil, and uses decant oil as a hydrogenated feed oil or pre-distills decant oil. The bottom component with a boiling point exceeding 230 ° C is obtained, the bottom component is adjusted to be a hydrogenated feed oil, the hydrorefined oil is obtained by catalytic hydrorefining to obtain a hydrorefined oil, and the hydrorefining It includes distilling oil to obtain a hydrogenated pitch, and further thermally polymerizing the hydrogenated pitch to obtain a mesophase pitch. In this method, the depth of hydrogenation is easy to control, the removal of impurities is thorough, the fluidity of the raw materials is good, and carbon deposition and coking are less likely to occur in the process, so the reactor is not clogged. High mesophase content, low softening point and low impurity content.