A method for preparing iron-loaded activated carbon using waste mercury catalyst

Abstract

The invention relates to a method for preparing iron-loaded activated carbon by utilizing waste mercury catalyst, and belongs to the technical field of waste resource utilization. In the present invention, the waste mercury catalyst, ammonium chloride and ferric chloride are uniformly mixed to obtain a mixture A, and then an oxidizing agent infiltration solution is added to the mixture A, and the infiltration treatment is carried out at a temperature of 20-70°C and reacted for 15-120 minutes, and then Under the conditions of ultrasonic and ozone atmosphere, react for 10-120min to obtain mixture B; microwave-dry mixture B at a microwave power of 500-900W until there is no gas to obtain mixture C and steam A, steam A is condensed and mercury is collected; mixture C is placed in Low-temperature roasting at 200-400°C for 10-90 minutes to obtain steam B and calcined sand. Steam B is dedusted and purified, condensed, and refined to obtain high-purity mercury; soak and wash the calcined sand with dilute hydrochloric acid, and dry to obtain iron-loaded activated carbon. The invention adopts synergistic strengthening of ultrasonic waves and ozone to treat solid waste, and turns solid waste into functional materials in one step, and has the advantages of short process, high regeneration efficiency and good economic benefits.

Description

technical field [0001] The invention relates to a method for preparing iron-loaded activated carbon by using waste mercury catalyst, which belongs to the technical field of resource utilization and environment. Background technique [0002] With the increasing expansion and development of acetylene synthesis of VCM in my country, the demand for mercuric chloride is increasing, and the amount of waste mercury catalyst produced is also increasing correspondingly. The amount of waste mercury catalyst produced is about 13,000 t / a. my country's environmental protection system is becoming increasingly strict, and people's awareness of environmental protection is becoming increasingly strong. How to effectively control and reduce the pollution of waste mercury catalysts to the environment and establish a mercury circular economy system to ensure sufficient supply and price stability of mercury catalysts has attracted much attention. [0003] At present, there are two main ways to ...

AI Technical Summary

Problems solved by technology

However, both recovery methods have certain limitations. During the combustion process, pyrometallurgy will produce a large amount of waste gas, high energy consumption, high pollution, low recovery rate, and difficult purification and separation.