Device and process for continuous elutriation, extraction and phase separation of 2-(4'-ethyl benzoyl) benzoic acid closed-loop liquid through one-step method

• Main Authors: HAN XIAOBING, ZHANG JINLONG, LIANG BAIQI, LIU XIAOBANG, XIE JIN
• Format: Patent
• Language: Chinese; English
• Published: 25.01.2022
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY

The invention relates to the technical field of synthesis of 2-ethyl anthraquinone, in particular to a device and process for continuous elutriation, extraction and phase separation of 2-(4'-ethyl benzoyl) benzoic acid closed-loop liquid through a one-step method. The device mainly comprises an elutriation kettle with an inner cylinder and an outer cylinder, an outer circulating pump and a heat exchanger. The method comprises the following steps: continuously introducing closed-loop liquid, an extracting agent and process water from different positions into relatively independent inner barrels of the elutriation kettles for mixing, allowing the mixed liquid to stand in the outer barrels of the elutriation kettles for layering to obtain extract liquid, overflowing the extract liquid from the elutriation kettles, and cooling and refluxing the acid water subjected to layering separation to the inner barrels of the elutriation kettles after circulating heat exchange. Continuous feeding and discharging are achieve