Method for preparing iron-loaded active carbon by utilizing waste mercury catalyst

Abstract

The invention relates to a method for preparing iron-loaded active carbon by utilizing a waste mercury catalyst, which belongs to the technical field of waste resource utilization. According to the method, the waste mercury catalyst, ammonium chloride and ferric chloride are uniformly mixed, so that a mixture A is obtained, the mixture A is then added with an oxidant impregnating solution, impregnation and reaction are carried out at the temperature of 20 DEG C to 70 DEG C for 15 to 120 minutes, and then reaction is carried out under the conditions of ultrasonic waves and ozone atmosphere for10 to 120 minutes, so that a mixture B is obtained; under the microwave power of 500W to 900W, the mixture B is dried by microwaves until no gas exists, so that a mixture C and vapor A are obtained, the vapor A is condensed, and mercury is collected; the mixture C is calcined by low temperature at the temperature of 200 DEG C to 400 DEG C for 10 to 90 minutes, so that vapor B and calcine are obtained, and after the vapor B is subjected to dust removal purification, condensation and refining, high-purity mercury is obtained; diluted hydrochloric acid is adopted to soak and wash the calcine, andafter drying, the iron-loaded active carbon is obtained. The method adopts the cooperative intensification of ultrasonic waves and ozone to treat solid waste, and turns the solid waste into the functional material in one step, and the method has the advantages of short process, high regeneration efficiency and good economic benefit.

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.