Method for starting coal ethylene glycol liquid phase hydrogenation device

• Main Authors: YE ZHAN, WANG LI, LIAO ZHIGAO, FU JUNZHI, JU WENZHANG, YANG JUN, LI HUI, WANG SHUO, TANG HONGJIAN, WEI DONG, WANG XIAOQIN, QIANG JUNFEI, LI JIANLIN, LI GANG
• Format: Patent
• Language: Chinese; English
• Published: 03.11.2023
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY

The invention belongs to the technical field of coal ethylene glycol liquid phase hydrogenation, and particularly relates to a method for starting a coal ethylene glycol liquid phase hydrogenation device, which comprises the following steps of: after the ethylene glycol liquid phase hydrogenation device is stopped, stopping feeding crude ethylene glycol into a liquid phase hydrogenation reactor, and introducing hydrogen into the liquid phase hydrogenation reactor through a hydrogen pipeline; hydrogen and a substance which is adsorbed in the catalyst and reduces the ultraviolet light transmittance of ethylene glycol are subjected to hydrogenation reaction to be removed and converted into a substance which has no influence on the ultraviolet light transmittance of ethylene glycol, and meanwhile, an ethylene glycol product is cooled in a circulating cooler through a hydrogenation product pump and then flows back to the liquid phase hydrogenation reactor; therefore, heat generated in the liquid-phase hydrogenatio