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Preparation process of polyaluminum chloride solution as water purifying agent

A kind of polyaluminum chloride, technology of preparation process

Pending Publication Date: 2022-02-08
吉林省益能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the traditional production process, in terms of process technology, high-speed dispersion and homogenization technology is used instead of conventional stirring technology, which solves the defect of limited polymerization degree adjustment in conventional alkali adjustment process, but polyaluminium chloride still has slow flocculation speed, The flocculation effect is poor, the adsorption performance is weak, the water insoluble and heavy metals are easy to exceed the standard, and the production cost is high.
[0006] In view of this, the existing problems are studied and improved, and a preparation process of water purifying agent polyaluminum chloride solution is provided to solve the existing problems of slow flocculation speed and poor effect, aiming to use this technology to achieve The purpose of solving problems and improving practical value

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] As shown below, a kind of water purifying agent polyaluminum chloride solution preparation process provided by the present invention comprises:

[0033] S1: Take polyaluminum chloride and crystalline glucose as raw materials, the mass ratio of polyaluminum chloride and crystalline glucose in the raw material is 5:2-2.3:0.8, mix well and add sodium hydroxide solution to react at room temperature;

[0034] S2: After the reaction is completed, add it to a high-speed homogeneous disperser for high-speed dispersion, add HCL solution in stages, so that the basicity (OH / Al ratio) of the reaction solution is controlled at 2.5±0.2, and the polyaluminum chloride mother liquor is obtained;

[0035] S3: Take the polyaluminum chloride mother liquor and soda ash solution, add the soda ash solution to the polyaluminum chloride mother liquor at a temperature ≥ 20°C at a rate of V*(0.1~3) g / min, and add the polyaluminum chloride mother liquor at a rate of ≥50r / min Stirring at high speed...

Embodiment 2

[0047] The difference from Example 1 is that the quality of cetyltrimethylammonium bromide added to the polyaluminum chloride product liquid in step S4 is 10-15% of the polyaluminum chloride product liquid and left to react for 1-2h , change to a mixed solution of diaminopolyethylene glycol and cetyltrimethylammonium bromide, the quality of the mixed solution is 5-8% of the finished product solution of polyaluminum chloride and stand for reaction for 1-2h.

[0048] The beneficial effect of Comparative Example 1 is that, using the reactivity of the amino group, other molecules can be connected to it by generating stable chemical bonds (such as amide bonds, carbamate bonds, urea bonds and secondary amine bonds). Among polyethylene glycols, the amino-functional PEG can be used to efficiently bridge the free polyaluminum chloride to further improve the flocculation effect.

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Abstract

The invention discloses a preparation process of a polyaluminum chloride solution as a water purifying agent, which comprises the following steps of: S1, well mixing polyaluminum chloride and crystalline dextrose as raw materials in a mass ratio of (5: 2)-(2.3: 0.8), adding a sodium hydroxide solution, and reacting at normal temperature; and S2, after the reaction is completed, adding the reaction product into a high-speed homogeneous dispersion machine for high-speed dispersion, adding an HCL solution in batches, and controlling the basicity (OH / Al ratio) of the reaction solution to be 2.5 + / -0.2, so as to obtain polyaluminum chloride mother liquor. According to the invention, the high-saturation sodium carbonate solution is added into the polyaluminum chloride mother liquor and stirred, so that the water purifying agent polyaluminum chloride solution has the advantages of high aluminum content, high basicity, high flow dispersity, wider pH application range and better coagulation effect, is suitable for treating various environmental water quality, and has the COD removal rate of 65% or more and the TP removal rate of about 99%.

Description

technical field [0001] The invention relates to the technical field of water purifying agents, in particular to a process for preparing a water purifying agent polyaluminum chloride solution. Background technique [0002] In order to meet the needs of my country's current water environment treatment projects, improve the scientific and technological content of my country's water treatment chemicals, and promote the development of my country's environmental protection industry. The main technical content of this project is: to produce various high-efficiency polyaluminum chloride and its compound water purifying agent series products by adopting the unique low-pressure polymerization at room temperature and the unique spray drying modern environmental protection technology. [0003] The polyaluminum chloride used by the water company is in the form of light yellow or yellow-white powder. All indicators have reached GB15892-2009 national drinking water purification treatment....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/56C02F1/52
CPCC01F7/56C02F1/5245
Inventor 陈东王超
Owner 吉林省益能科技有限公司
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