Method for recovering chlorine-containing volatile organic compounds in organic waste gas by using ionic liquid

• Main Authors: ZHANG XIANGPING, NIE YI, ZENG SHAOJUAN, WU ZHIXING, ZHANG MANMAN, BAI LU, BAI YINGE, DONG HAIFENG, DUAN YUANMENG
• Format: Patent
• Language: Chinese; English
• Published: 14.12.2021
• Subjects: PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

The invention provides a method for recovering chlorine-containing volatile organic compounds in organic waste gas by using ionic liquid. The method comprises the following steps: designing an ionic liquid absorbent with hydrogen bond-halogen bond action, and carrying out absorption-flash evaporation-gas stripping coupling on the absorbent to efficiently and selectively absorb the chlorine-containing volatile organic compounds. The method is used for solving the problems that the chlorine-containing volatile organic compounds in the organic waste gas are low in absorption capacity and wastewater is generated in a recovery process. The ionic liquid absorbent provided by the invention can be repeatedly used after regeneration, the absorption performance of the absorbent is basically kept unchanged, the purity of the recovered chlorine-containing volatile organic compound is greater than 99%, the recovery rate of the chlorine-containing volatile organic compound is greater than 99%, green and efficient recovery