Method for coproduction of bleaching powder and active carbon as well as chlorine-containing compound from carbide slag

A chlorine compound and carbide slag technology, applied in the direction of hypochlorous acid and hypochlorite, can solve the problems of less production, low production efficiency, and immature technology, so as to promote the development of enterprises and increase the total production value , the effect of improving economic efficiency

Inactive Publication Date: 2009-05-27
南通宙亚电子科技有限公司
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Problems solved by technology

[0002] At present, people have done a lot of research on the utilization technology of waste carbide slag discharged from the acetylene gas phase synthesis of polyvinyl chloride industry and urban dissolved acetylene plants, but few have been put into production.
It is not that the technology is immature, but that the product is single and the production efficiency is not high

Method used

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  • Method for coproduction of bleaching powder and active carbon as well as chlorine-containing compound from carbide slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 200kg of calcium carbide slag (calcium hydroxide content is 85%; dry material) and 600kg of water are injected into preprocessor 1 with a stirring device and stirred to form a uniform emulsion, and naturally settle for 30s to form suspended calcium hydroxide emulsion liquid; calcium hydroxide emulsion and hydrochloric acid are injected into the purifier 2 according to the pure substance quality 1:0.8, stirred for 10 minutes to make the substance completely react, and after the reaction solution is filtered, calcium chloride filtrate and filter cake are formed; calcium chloride filtrate and the sodium hydroxide generated by electrolysis is injected into the sub-reactor 3 according to the pure substance quality 1:0.6 and stirred to generate high-purity calcium hydroxide and relatively pure sodium chloride solution, and the sodium chloride solution is produced by centrifuge 7 and distiller 8 Get industrial salt containing sodium chloride 186.57kg, high-purity calcium hydrox...

Embodiment 2

[0027] The process flow is as in Example 1, 200kg calcium hydroxide slag (calcium hydroxide content is 85%; dry material) and 1200kg water, natural sedimentation for 50s, calcium hydroxide emulsion and hydrochloric acid according to the pure substance quality 1:1.2, stir for 10 minutes , calcium chloride filtrate and sodium hydroxide generated by electrolysis according to the pure substance quality 1:1.1, the industrial salt containing sodium chloride 268.78kg, high-purity calcium hydroxide and chlorine gas pure substance quality 1:1.1, the bleaching powder finished product 154.31kg, filter cake reacts with the hydrochloric acid solution of concentration 10%, both obtained high-quality gac product 12kg, makes 93.5kg calcium chloride dihydrate.

Embodiment 3

[0029] The process flow is as in Example 1, 200kg of calcium carbide slag (calcium hydroxide content is 85%; dry material) and 800kg of water, natural sedimentation for 20s, calcium hydroxide emulsion and hydrochloric acid according to the pure substance quality 1:0.6, stir for 10 minutes , calcium chloride filtrate and sodium hydroxide generated by electrolysis according to the pure substance quality 1:0.4, the industrial salt containing sodium chloride 93.27kg, high-purity calcium hydroxide and chlorine gas pure substance quality 1:0.4, ready-made bleaching powder refined product 33.74kg, filter cake reacts with the hydrochloric acid solution of concentration 10%, both obtained high-quality gac product 12kg, makes 20.44kg calcium chloride dihydrate.

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Abstract

The invention discloses a method for joint production of activated carbon and compounds containing chlorine by using acetylene sludge to produce bleaching powder. The main technical proposal of the method comprises the following steps: the acetylene sludge is pretreated and then reacts with hydrochloric acid, a calcium chloride solution is obtained through the filtration, a filtrate reacts with sodium hydroxide produced by the electrolysis in a chlor-alkali plant to generate high-purity calcium hydroxide, the calcium hydroxide is chloridized, centrifuged, dried, and crushed to obtain the bleaching powder, and a filter cake reacts with the hydrochloric acid to obtain the activated carbon. Calcium chloride produced during the reaction can be produced into calcium chloride dihydrate and anhydrous calcium chloride; and sodium chloride can be produced into industrial salt. The method can ensure that an enterprise completely throws off the heavy burden of three wastes, make the enterprise achieve the fundamental aim of zero emission, greatly increase the total output value of the enterprise, and improve the economical benefit to a great extent. The method also adjusts a product structure of the enterprise, turns waste materials into bleaching powder and activated carbon products with high added values, improves the capability of deep processing of the enterprise, and has large pushing effect on the development of the enterprise.

Description

technical field [0001] The invention relates to a method for manufacturing bleaching powder, in particular to a method for manufacturing bleaching powder and co-producing activated carbon and chlorine-containing compounds with calcium carbide slag. Background technique [0002] At present, there are many studies on the utilization technology of the waste carbide slag discharged from the acetylene gas phase synthesis of polyvinyl chloride industry and urban dissolved acetylene plants, but few have been put into production. It's not that the technology is immature, but that the product is single and the production efficiency is not high. For example: two patents of Chinese patent "method for producing bleaching powder with carbide slag", publication number CN1040007 and Chinese patent "method for producing bleaching powder concentrate with carbide slag", publication number CN1058000, are both single products. The invention makes up for the shortcomings of single product and l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B11/06C01B31/08
Inventor 王嘉兴
Owner 南通宙亚电子科技有限公司
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