Production of coke with high tar and gas yields

Abstract

Abstract PURPOSE:To prepare coke and recover tar and gas as by-products in high yields, by depolymerizing coal, recovering the low-MW component thus prepd., and carbonizing or carbonizing the low-MW component after molding. CONSTITUTION:Coal is depolymerized at pref. 300-600 deg.C. The depolymerization product is extracted with, e.g., a solvent such as tetrahydrofuran, to recover a low-MW component. This component is carbonized directly or after molding to prepare coke. When coal is directly carbonized according to the conventional process, there occurs depolymerization. However, most of the depolymerization product brings about re-polymerization to prepare coke. This lowers the yields of tar and gas, particularly tar. According to the present process, since the low-MW component prepared by depolymerization of coal is carbonized after recovery of tar and gas, the re-polymerization of the low-MW component can be prevented, which enhances the yields of tar and gas, particularly tar.

Inventors

• 👤 Isao Mochida
• 👤 勲 持田
• 👤 Katsuaki Okuhara
• 👤 奥原　捷晃
• 👤 Takashi Arima
• 👤 孝 有馬

Bibliographic Details