COAL TAR AND HYDROCARBON MIXTURE PITCH AND THE PREPARATION AND USE THEREOF

摘要

A method of making a high softening point coal tar pitch using high efficien cy evaporative distillation, as well as the uses and applications of such pitch . According to the method, a feed coal tar pitch having a softening point in t he range of 70~C to 160~C is fed into a processing vessel wherein the processin g vessel is heated to a temperature in the range of 300~C to 450~C and wherein a pressure inside the processing vessel is in the range of 5 Torr or less. An output coal tar pitch is withdrawn from the processing vessel. The output co al tar pitch has a softening point in the range of 140~C to 300~C and has less than 5% mesophase.