System for separating isopropanol and water by extractive distillation

• Main Authors: WANG YI, CHAI QING, ZHANG XINDANG, GONG LIFANG
• Format: Patent
• Language: Chinese; English
• Published: 05.04.2022
• Subjects: PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

The utility model belongs to the technical field of wastewater treatment, and particularly relates to a system for separating isopropanol and water by extractive distillation, which comprises an azeotropic distillation tower and an extractive distillation tower, the middle of the azeotropic distillation tower is connected with a waste liquid input pipeline, the top of the azeotropic distillation tower is communicated with the middle of the extractive distillation tower, and the bottom of the azeotropic distillation tower is communicated with a wastewater pipeline. The top of the extractive distillation tower is respectively connected with an ethylene glycol input pipeline and an isopropanol finished product pipeline, and the bottom of the extractive distillation tower is connected with an extractant recovery pipeline. According to the system for separating isopropanol and water by extractive distillation, the isopropanol waste liquid is treated by the azeotropic distillation tower to generate a tower top prod