Method for preparing vinyl chloride synthesizing catalysts from mercury in waste gas

A vinyl chloride and catalyst technology, applied in the field of catalysis, can solve the problems of high cost, no consideration of catalyst resource utilization, large nitrogen consumption, etc., and achieve the effects of reducing investment, not producing secondary pollution, and controlling emissions

Active Publication Date: 2016-07-20
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention needs to be realized under a nitrogen atmosphere, and the consumption of nitrogen is relatively large
The above methods have a certain effect on the

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Crush and dry coal-based activated carbon, sieve, select a particle size of about 30 mesh for use; wash 5 times with deionized water at a temperature of 30°C to remove dust, put it in an oven and dry it at 80°C for 12 hours, put the activated carbon into a 500W In the microwave reactor, under the protection of nitrogen with a flow rate of 100mL / min, the microwave modification was carried out for 15min, and the activated carbon pretreatment process was completed;

[0034] Weigh 2.703g of FeCl 3 For solid samples, pour them into a beaker, add an appropriate amount of distilled water, and stir with a glass rod until FeCl 3 After the solid was completely dissolved, the solution was fixed to a 100mL volumetric flask to obtain 0.1mol / L-FeCl 3 Standby; weigh 10g, 30 mesh sieved microwave modified activated carbon, put the prepared FeCl 3 solution, and stirred with a magnetic stirrer for 24 hours, the clear liquid was vacuum filtered, and the filtered solid matter was dried i...

Embodiment 2

[0038] Crush and dry coal-based activated carbon, sieve, select a particle size of about 60 mesh for use; wash 3 times with deionized water at a temperature of 80°C to remove dust, put it in an oven and dry it at 110°C for 6 hours, and put the activated carbon into a 700W In the microwave reactor, under the protection of nitrogen with a flow rate of 300mL / min, the microwave modification was carried out for 3 minutes, and the activated carbon pretreatment process was completed;

[0039] Weigh 2.0445g of zinc chloride solid sample, pour it into a beaker, add an appropriate amount of distilled water, stir with a glass rod until the zinc chloride solid is completely dissolved, and then dilute the solution to a 100mL volumetric flask to obtain 0.15mol / L zinc chloride solution for standby; weigh 10g, 60-mesh sieved activated carbon, put it into the prepared zinc chloride solution according to the solid-liquid volume ratio of 1:5, stir with a magnetic stirrer for 30h, and vacuum filt...

Embodiment 3

[0043] Crushed and dried coal-based activated carbon, sieved, and selected powder with a particle size of about 120 mesh for use; washed 4 times with deionized water at a temperature of 60°C to remove dust, dried in an oven at 100°C for 9 hours, and put the activated carbon into In a 900W microwave reactor, under the protection of nitrogen with a flow rate of 200mL / min, the microwave modification was carried out for 8 minutes, and the activated carbon pretreatment process was completed;

[0044] Weigh 3.4096g of copper chloride solid sample, pour it into a beaker, add an appropriate amount of distilled water, stir with a glass rod until the copper chloride solid is completely dissolved, and then set the solution to a 100mL volumetric flask to obtain 0.2mol / L copper chloride solution for subsequent use. Weigh 10g, 120 mesh sieved activated carbon, put it into the prepared cupric chloride solution according to the solid-liquid volume ratio of 1:3, and stir with a magnetic stirr...

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PUM

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Abstract

The invention discloses a method for preparing vinyl chloride synthesizing catalysts from mercury in waste gas. The method includes impregnating activated carbon by the aid of metal chloride solution MCl<x> and then adsorbing the null-valence mercury in the flue gas to prepare the vinyl chloride synthesizing catalysts. The vinyl chloride synthesizing catalysts can be applied to industrially catalytically synthesizing vinyl chloride. Compared with the prior art, the method has the advantages that the method is easy to implement, low in cost and high in mercury adsorption capacity and absorption quantity, the proportion of the null-valence mercury, which is transformed into bi-valence mercury, in the coal-fired flue gas can be increased, the purpose of removing the mercury in the flue gas can be achieved, the novel catalysts obtained after adsorption reaction is carried out can be applied to industrially catalytically synthesizing the vinyl chloride and are stable in catalytic performance and long in usage time, and the like.

Description

technical field [0001] The invention relates to a method for preparing a catalyst for synthesizing vinyl chloride by using waste gas mercury, which belongs to the field of catalysis. Background technique [0002] Coal-fired power plants are a major source of mercury in the atmosphere. In the combustion process: Mercury has three forms, oxidized mercury (Hg 2+ ), particulate mercury (Hg p ) and elemental mercury (Hg 0 ). Oxidized and particulate mercury can be removed by dust removal, wet scrubbing, or dry sorbent injection, while elemental mercury has a low melting point (-38.9°C), high equilibrium vapor pressure (0.25Pa at 25°C) and low Water solubility (60mg / m at 25°C 3 ) and the average residence time in the atmosphere is as long as half a year to 2 years, and it is easy to form extensive mercury pollution through long-distance atmospheric transportation in the atmosphere. It is the most difficult form of flue gas mercury to control. [0003] Electrostatic precipita...

Claims

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Application Information

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IPC IPC(8): B01J37/02B01J37/34B01J27/138C07C17/08C07C21/06B01J20/20B01J20/32B01D53/02B01D53/64
CPCB01D53/02B01D53/64B01D2257/602B01D2258/0283B01J20/20B01J27/138B01J37/0201B01J37/346C07C17/08C07C21/06
Inventor 王学谦王郎郎宁平王平
Owner KUNMING UNIV OF SCI & TECH
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