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A kind of preparation method of polyaluminum ferric chloride

A technology of polyaluminum ferric chloride and polyaluminum chloride, which is applied in chemical instruments and methods, iron compounds, inorganic chemistry, etc., can solve the problems of high processing cost, large amount of material slag, secondary pollution, etc., and achieves good environmental protection. , No waste residue, cost saving effect

Active Publication Date: 2021-01-22
JIANGXI PENGTENG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the strengthening of national environmental protection, the produced polyaluminum chloride waste residue, crystalline aluminum chloride mother liquor wastewater and chlorine-containing tail gas have become new environmental problems. If they are not recycled and disposed of in a timely and effective manner, they may cause secondary pollution.
At present, polyaluminum chloride is usually prepared by reacting bauxite and calcium aluminate powder. During the production process, there are a lot of residual material slag, which are all disposed of in landfill; the wastewater of crystalline aluminum chloride mother liquor is usually They are all treated by alkali neutralization, with a lot of slag and salt, and the treatment cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method of polyaluminum ferric chloride, the steps of the preparation method comprising:

[0028] S11, put the crystalline aluminum chloride mother liquor wastewater into the reaction tank, add 1-3% tail gas recovery hydrochloric acid and 6-10% active aluminum iron powder to dilute to form a mixed solution with a specific gravity of 1.18-1.2, and heat it to the first preliminary Set temperature.

[0029] Specifically, in order to facilitate the subsequent polymerization reaction, the first preset temperature is 45-55°C.

[0030] S12, adding 1-3% active aluminum and 6-8% soluble acid regulator to adjust the basicity of the mixed solution, and raising the temperature to a second preset temperature for polymerization to form a discharge solution.

[0031] It should be noted that in this step, the purpose of adding the active aluminum and the regulator is to adjust the basicity of the mixed solution, and an exothermic reaction will occur, so as to facilitate b...

Embodiment 2

[0054]S21, put the crystalline aluminum chloride mother liquor wastewater into the reaction tank, add 1-3% tail gas recovery hydrochloric acid and 6-10% ferric chloride waste liquid to dilute to form a mixed solution with a specific gravity of 1.18-1.2, and heat to the first preset temperature.

[0055] Specifically, directly using crystallized aluminum chloride mother liquor waste water, recovered hydrochloric acid and ferric chloride waste liquid as raw materials can save costs and has good environmental protection. In order to facilitate the subsequent polymerization reaction, the first preset temperature is 45-55°C.

[0056] S22, adding 1-3% active aluminum and 6-8% soluble acid regulator to adjust the basicity of the mixed solution, and raising the temperature to a second preset temperature for polymerization to form a discharge solution.

[0057] It should be noted that in this step, the purpose of adding the active aluminum and the regulator is to adjust the basicity o...

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PUM

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Abstract

The invention discloses a preparation method of polyaluminum ferric chloride. The preparation method comprises the following steps: introducing crystalline aluminum chloride mother liquor into a reaction tank, adding 1% to 3% of hydrochloric acid recovered from tail gas and 6% to 10% of active aluminum iron powder or ferric chloride waste liquid, diluting to form a mixed solution having specific gravity of 1.18 to 1.2, and heating to a first preset temperature; adding 1% to 3% of active aluminum and 6% to 8% of a regulator to adjust the base degree of the mixed solution, and heating to a second preset temperature to carry out polymerization to form a discharge solution; pumping the discharge solution into a sedimentation tank for precipitation to form a clear liquid and a precipitate; anddirectly pumping the clear liquid into a continuous evaporative drying granulation apparatus for dry granulation to form polyaluminum chloride finished product. In the preparation method of polyaluminum ferric chloride disclosed by the invention, the crystalline aluminum chloride mother liquor, the recovered hydrochloric acid and the ferric chloride waste liquid are directly used as raw materials,which not only can save cost and has good environmental friendliness, but also has no waste residue in the production process and has high yield.

Description

technical field [0001] The invention relates to the technical field of preparing polyaluminum ferric chloride, in particular to a preparation method of polyaluminum ferric chloride. Background technique [0002] With the increase of national environmental protection efforts, the produced polyaluminum chloride waste residue, crystalline aluminum chloride mother liquor wastewater and chlorine-containing tail gas have become new environmental problems. If they are not recycled and disposed of in a timely and effective manner, they may cause secondary pollution. At present, polyaluminum chloride is usually prepared by reacting bauxite and calcium aluminate powder. During the production process, there are a lot of residual material slag, which are all disposed of in landfill; the wastewater of crystalline aluminum chloride mother liquor is usually They are all treated with alkali neutralization, which has a lot of slag and salt, and the treatment cost is high. Contents of the i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/00
CPCC01G49/009
Inventor 姜鹏俊姜起盛姜起腾
Owner JIANGXI PENGTENG IND