The research of separating traces of thiophene from benzol and toluene by extractive distillation

摘要

Thiophene are those must not remain but very difficult to be removed in coking light benzene purification. Meanwhile thiophene and its derivants are important raw material of the medicine, material catalyzer and etc. This paper uses the software of Aspen plus find out the most effective extractive solvent in the extractive distillation process to benzene-thiophene and toluene-methylthiophene system. The research results indicated that high purity of 99.99% benzene/toluene and commercial-grade thiophene/methylthiophene are obtained through extractive distillation.