Process for direct coal liquefaction

US7763167B2 · kind B2 · utility

Assignees

• SHENHUA GROUP CORPORATION LIMITED · CN
• China Shenhua Coal Liquefaction Corporation · CN

Inventors

• Yuzhuo Zhang · Beijing, CN
• Geping Shu · Beijing, CN
• Jialu Jin · Beijing, CN
• Minli Cui · Beijing, CN
• Xiuzhang Wu · Beijing, CN
• Xiangkun Ren · Beijing, CN
• Yaowu Xu · Beijing, CN
• Shipu Liang · Beijing, CN
• Jianwei Huang · Lo Wu, CN
• Ming Yuan · Nanhu, CN
• Juzhong Gao · Beijing, CN
• Yufei Zhu · Beijing, CN

Key dates

• Filing date: Jul 27, 2005
• Grant date: Jul 27, 2010
• Expiry date: Jan 21, 2026

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10G2300/44
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Process for direct coal liquefaction of coal, including: (1) preparing a coal slurry from raw coal; (2) preheating the coal slurry, then feeding it into reaction system to undergo liquefaction reaction; (3) separating reaction products in a separator to form a liquid phase and a gas phase, wherein the liquid phase is fractionated in an atmospheric tower into a light oil fraction and a bottom product; (4) feeding the atmospheric tower bottom product to a vacuum tower to separate into distillate and vacuum residue; (5) mixing the light oil fraction and the distillate to form a mixture, then feeding the mixture to a suspended bed hydrotreating reactor with forced circulation for hydrogenation; (6) fractionating hydrogenation products into oil products and a hydrogen donor recycling solvent. The process can operate long periods, with higher reactor efficiency and utilization factor, increased liquid oil yield and can supply high-quality feedstock for further processing.