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Method for producing calcium hypochlorite by aluminium trichloride production waste gas

A technology of aluminum trichloride and calcium hypochlorite, which is applied in the direction of hypochlorous acid and hypochlorite, can solve the problems of waste of resources, environment and pollution, and achieve the effect of protecting the environment and improving the utilization rate of resources

Inactive Publication Date: 2014-03-26
滨州坤宝化工有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The production of aluminum trichloride is to melt the aluminum ingot and pass it into the gasified chlorine gas for reaction, and the aluminum trichloride gas obtained by the reaction enters the trap through the sublimation tube to cool, so the chlorine gas in the reaction is excessive, and the excess chlorine gas is Chlorine needs to be treated with tail gas, otherwise it will cause a lot of waste of resources and environmental pollution, which is a deficiency in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A kind of method producing calcium hypochlorite with aluminum trichloride production waste gas, it comprises the steps: Aluminum trichloride production waste gas is sent to secondary series absorption tower by pipeline, and spray concentration is the lime emulsion of 1%, and control pass The speed of entering the exhaust gas is 10 cubic meters / min, the reaction temperature is 8°C, and when the pH is 9 and the turbidity is 33g / liter, it is poured into the sedimentation tank for sedimentation, and liquid calcium hypochlorite is obtained after 4 hours.

[0018] The chlorine gas content in the original exhaust gas is 95%, the chlorine gas content after absorption is 1.2%, the chlorine gas absorption rate is 98.74%, and the available chlorine content is 13.5%.

Embodiment 2

[0020] A kind of method producing calcium hypochlorite with aluminum trichloride production waste gas, it comprises the steps: Aluminum trichloride production waste gas is sent to secondary series absorption tower by pipeline, and spray concentration is the lime emulsion of 2%, and control pass The speed of entering the exhaust gas is 10 cubic meters / min, the reaction temperature is 8°C, and when the pH is 9 and the turbidity is 33g / liter, it is poured into the sedimentation tank for sedimentation, and liquid calcium hypochlorite is obtained after 4 hours.

[0021] The chlorine gas content in the original exhaust gas is 95%, the chlorine gas content after absorption is 0.6%, the chlorine gas absorption rate is 99.4%, and the available chlorine content is 15.5%.

Embodiment 3

[0023] A kind of method that produces calcium hypochlorite with aluminum trichloride production waste gas, it comprises the steps: Aluminum trichloride production waste gas is sent to secondary series absorption tower by pipeline, and spray concentration is the lime emulsion of 5%, and control pass The speed of entering the exhaust gas is 10 cubic meters / min, the reaction temperature is 8°C, and when the pH is 9 and the turbidity is 33g / liter, it is poured into the sedimentation tank for sedimentation, and liquid calcium hypochlorite is obtained after 4 hours.

[0024] The chlorine gas content in the original exhaust gas is 95%, the chlorine gas content after absorption is 0.8%, the chlorine gas absorption rate is 99.2%, and the available chlorine content is 15.3%.

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PUM

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Abstract

The invention relates to the technical field of recycling and reusing of waste gas in the chemical industrial production and particularly relates to a method for producing calcium hypochlorite by aluminium trichloride production waste gas. The method comprises the following steps: feeding the aluminium trichloride production waste gas into a two-stage series absorption tower by a pipeline; spraying lime emulsion with concentration of 1 to 10 percent; controlling the waste gas filling speed to be 5 to 15 cubic meters per minute and controlling the reaction temperature to be 5 to 10 DEG C; when the pH is 8 to 10 and the turbidity is 25 to 40g / L, pumping the obtained product into a sedimentation tank for sedimentation and after four hours, obtaining liquid calcium hypochlorite. The method has the benefits that the lime emulsion is sprayed into the waste gas and all the parameters are strictly controlled, so that the recovery rate of chlorine gas in the waste gas is increased to over 98 percent; and the chlorine gas in the waste gas is directly used for producing the calcium hypochlorite, so that the resource utilization rate is improved and the environment is protected.

Description

technical field [0001] The invention relates to the technical field of waste gas recovery and reuse in chemical industry production, and more specifically relates to a method for producing calcium hypochlorite from waste gas produced by aluminum trichloride. Background technique [0002] The production of aluminum trichloride is to melt the aluminum ingot and pass it into the gasified chlorine gas for reaction, and the aluminum trichloride gas obtained by the reaction enters the trap through the sublimation tube to cool, so the chlorine gas in the reaction is excessive, and the excess chlorine gas is Chlorine needs to be treated with tail gas, otherwise it will cause a lot of waste of resources and environmental pollution, which is a deficiency in the prior art. Contents of the invention [0003] The purpose of the invention of the present invention is to address the above deficiencies and provide a method for producing calcium hypochlorite from waste gas produced by alumi...

Claims

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Application Information

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IPC IPC(8): C01B11/06
Inventor 王修福
Owner 滨州坤宝化工有限责任公司
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