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Production method of polyaluminium chloride

A polyaluminum chloride and production method technology, applied in the direction of aluminum chloride, aluminum halide, solid waste removal, etc., can solve the problems of unfavorable environment and resource protection, achieve favorable environment and resource protection, reduce production costs, and effectively Conducive to the effect of environment and resource protection

Active Publication Date: 2009-10-07
苏州市亨文环保水业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current PAC production process is very unfavorable to the environment and resource protection

Method used

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  • Production method of polyaluminium chloride

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Acidic waste water (acidity is 10%) is mixed with industrial hydrochloric acid (acidity is 31%) in a mass ratio of 1:1 to obtain HCl solution, and aluminum-containing sludge (Al 2 o 3 content is about 12%) and HCl solution reacted in the mixing pool for 6 hours with the mass ratio of 1.12:0.53, and the acidity obtained was 10.5%, Al 2 o 3 The reaction mother liquor with a content of 8.0%, a small amount of HCl gas escapes during this process, and the HCl gas becomes a washing liquid with an acidity of 15-20% after being absorbed by acid mist, and the washing liquid is circulated to the mixing tank to participate in the reaction, acid mist absorption system They are topped up with fresh tap water.

[0023] The reaction mother liquor and aluminum-containing sludge are reacted in the reactor at a mass ratio of 265:70, the reaction pressure: 0.2-0.4MPa, the reaction temperature: 110-120°C, the reaction time: 3h, and then the reaction mixture in the reactor is transferred ...

Embodiment 2

[0030] Acidic wastewater (acidity 19%) was used as HCl solution, aluminum-containing sludge (Al 2 o 3 content is about 14%) and HCl solution with the mass ratio of 1:0.5 reacted in the mixing pool for 8 hours, and the acidity was 9%, Al 2 o 3 The reaction mother liquor with a content of 9.0%, a small amount of HCl gas escapes during this process, and the HCl gas becomes a washing liquid with an acidity of 15-20% after being absorbed by the acid mist, and the washing liquid is circulated to the mixing tank to participate in the reaction, the acid mist absorption system They are topped up with fresh tap water.

[0031] The reaction mother liquor and aluminum-containing sludge are reacted in the reactor at a mass ratio of 1:0.3, the reaction pressure: 0.2-0.4MPa, the reaction temperature: 110-120°C, the reaction time: 4h, and then the reaction mixture in the reactor is transferred Transfer to the aging tank, after aging for 24 hours, transfer to the settling tank, add a settli...

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Abstract

The invention relates to a production method of the polyaluminium chloride, which takes wastes as main materials, therefore, the production method is very beneficial to the environment and resource protection. The production method of the polyaluminium chloride comprises the following steps: a. the first aluminum-containing material reacts with the hydrochloric acid solution to obtain the reaction mother liquor; and b. the reaction mother liquor reacts with the second aluminum-containing material, then curing and depositing, the upper layer clear liquid is taken out, namely the polyaluminium chloride solution. The first aluminum-containing material and the second aluminum-containing material comprises the aluminum-containing sludge, the acidity of the reaction mother liquor in the step a is 9% to 12%, the content of Al2O3 is more than or equal to 8.0%, in the step b, the reaction mother liquor and the aluminum-containing material react under the condition of 110 to 120 DEG C and 0.2 to 0.4MPa. The invention completely utilizes the industrial waste, and saves a mass of mineral resources and industrial hydrochloric acid, the production process focuses on the recycling utilization of the industrial waste, which is very beneficial to the environment and resource protection, and simultaneously the production costs of the PAC product are significantly reduced.

Description

technical field [0001] The invention relates to a production method of polyaluminum chloride, which belongs to the field of water treatment additives. Background technique [0002] Polyaluminum chloride (hereinafter referred to as PAC) is a commonly used high-efficiency water treatment additive, and aluminum-containing raw materials such as calcium aluminate powder or bauxite are important raw materials for its production. The production of PAC not only needs to consume a large amount of mineral resources, but also requires HCl as a raw material, which has a very adverse impact on the environment and resources. With the development of the economy, more and more waste water is produced. At the same time, people pay more and more attention to the environment, and the requirements for waste water treatment are getting higher and higher. The amount of PAC used as an efficient water treatment additive is also increasing. The current PAC production process is very unfavorable to...

Claims

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Application Information

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IPC IPC(8): C01F7/56B09B3/00C02F1/52
Inventor 朱文荣
Owner 苏州市亨文环保水业有限公司
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