Process for producing mesophase pitch

摘要

A substantially uniform mesophase pitch is prepared by treating a mesophase forming pitch material at elevated temperatures above about 380 DEG C. to produce a mixture of mesophase and non-mesophase pitch containing about 20% to about 80% mesophase. The mixture is then maintained at a temperature below about 400 DEG C. for a time sufficient to allow the mesophase to coalesce and settle as a lower separable layer. A mesophase pitch so produced may contain from 90 to 100% mesophase with a softening point of less than 320 DEG C.