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

A waste mercury catalyst, activated carbon technology, applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc., can solve the problems of difficult purification and separation, low recovery rate, large amount of waste gas, etc., to improve surface adsorption The effect of high activity, high recovery rate and less pollution

Active Publication Date: 2019-01-25
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: a kind of method utilizing waste mercury catalyst to prepare iron-loaded activated carbon, concrete steps are as follows:

[0020] (1) Mix waste mercury catalyst, ammonium chloride and ferric chloride evenly to obtain mixture A, and then add oxidant infiltration solution (H 2 o 2 Solution), infiltration treatment was carried out at a temperature of 20°C and reacted for 15 minutes, and then reacted under ultrasonic and ozone atmosphere conditions for 10 minutes to obtain a mixture B; the content of mercuric chloride in the waste mercury catalyst was 2% by mass percentage; The mass ratio of waste mercury catalyst, ammonium chloride and ferric chloride is 100: 0.1: 0.1; 2 o 2 Solution) concentration is 5%, the liquid-solid ratio mL:g of the oxidant infiltration solution to the mixture A is 2:1; the ultrasonic power is 200w, and the flow rate of ozone is 0.01mL / min;

[0021] (2) Microwave-dry the mixture in step (1) at a microwave power of 500W until there ...

Embodiment 2

[0025] Embodiment 2: a kind of method utilizing waste mercury catalyst to prepare iron-loaded activated carbon, concrete steps are as follows:

[0026] (1) Mix waste mercury catalyst, ammonium chloride and ferric chloride evenly to obtain mixture A, and then add oxidant infiltration solution (H 2 o 2 Solution), infiltration treatment was performed at a temperature of 50°C and reacted for 60 minutes, and then reacted under ultrasonic and ozone atmosphere conditions for 60 minutes to obtain a mixture B; in which, the content of mercuric chloride in the waste mercury catalyst was 10% by mass percentage; The mass ratio of waste mercury catalyst, ammonium chloride and ferric chloride is 100: 2: 0.5; oxidant soaking solution (H 2 o 2 Solution) concentration is 10%, the liquid-solid ratio mL:g of the oxidant infiltration solution to the mixture A is 8:1; the ultrasonic power is 1000w, and the flow rate of ozone is 0.1mL / min;

[0027] (2) Microwave-dry the mixture in step (1) at a ...

Embodiment 3

[0031] Embodiment 3: a kind of method utilizing waste mercury catalyst to prepare iron-loaded activated carbon, concrete steps are as follows:

[0032] (1) Mix waste mercury catalyst, ammonium chloride and ferric chloride evenly to obtain mixture A, and then add oxidant infiltration solution (H 2 o 2 Solution), infiltration treatment was performed at a temperature of 70°C and reacted for 120 minutes, and then reacted under ultrasonic and ozone atmosphere conditions for 120 minutes to obtain a mixture B; in which, the content of mercury chloride in the waste mercury catalyst was 20% by mass percentage; The mass ratio of waste mercury catalyst, ammonium chloride and ferric chloride is 100:5:1; the oxidant soaking solution (H 2 o 2 Solution) concentration is 15%, the liquid-solid ratio mL:g of the oxidant infiltration solution to the mixture A is 15:1; the ultrasonic power is 2000w, and the ozone flow rate is 0.5mL / min;

[0033] (2) Microwave-dry the mixture in step (1) at a m...

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PUM

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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 ...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30B01J23/745C02F1/28C22B43/00
CPCB01J20/20C22B43/00C02F1/281C02F1/283B01J20/28057B01J20/30B01J23/745
Inventor 张利波杨坤李世伟彭金辉朱霏
Owner KUNMING UNIV OF SCI & TECH
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