Preparation method of loose type polyaluminum ferric chloride flocculants

A technology of polyaluminum chloride and bulking agent, used in aluminum chloride, aluminum halide, flocculation/sedimentation water/sewage treatment, etc., can solve the problems of large dosage of chemicals, difficulty in forming flocculation sedimentation, corrosiveness, etc., and achieve strong electric charge Neutralization, excellent flocculation performance, and the effect of reducing environmental pollution

Active Publication Date: 2012-11-07
TIANJIN PIPELINE ENG GROUP
View PDF10 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, ferric chloride also has the following disadvantages in use: 1) The dosage of the agent is large, the content of residual iron ions is high, and the low-molecular iron salt is corrosive to the equipment during use, and the chromaticity of the treated water is higher than that of aluminum High salinity; 2) The formation of flocs is less, and the sludge after flocculation cannot be effectively used; 3) Ferric salts are not suitable for treating industrial wastewater containing sulfides, because Fe3+ ions and sulfides will generate iron sulfide or ferrous sulfide 4) When the dosage of iron salt is insufficient, the ferric hydroxide colloid formed by hydrolysis not only does not thresh and destabilize impurities, but becomes a stable system by itself, which increases the turbidity of raw water, and The higher the degree of alkalinity, the greater the residual turbidity
Since these production processes include the process of extracting aluminum and iron, the process is complicated and there are residues discharged, which is not conducive to environmental protection.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of loose type polyaluminum ferric chloride flocculants
  • Preparation method of loose type polyaluminum ferric chloride flocculants
  • Preparation method of loose type polyaluminum ferric chloride flocculants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A kind of preparation method of loose polyaluminum ferric chloride flocculant, the steps are as follows:

[0017] 1) Add 122g of polyaluminum chloride solution with a mass percent concentration of 10% in a 500ml four-neck bottle equipped with stirring, reflux condenser, and thermometer, and then dropwise add 38g of a mass percent concentration under stirring at room temperature and 150r / min Mix 8.4% ferric chloride solution with 37g potassium carbonate solution with a mass percent concentration of 18.9%, the mass ratio of iron and aluminum elements in the mixed solution is 1:6, and the amount of potassium carbonate is 92.4% of the total mass of iron and aluminum elements. %;

[0018] 2) Continue to stir the above mixture for 30 minutes, and then continue to react for 4 hours under stirring at a temperature of 80°C and a rotation speed of 150r / min to obtain a loose polyaluminum ferric chloride flocculant (No. TW-19).

Embodiment 2

[0020] A kind of preparation method of loose polyaluminum ferric chloride flocculant, the steps are as follows:

[0021] 1) Add 122g of polyaluminum chloride solution with a mass percent concentration of 10% in a 500ml four-neck bottle equipped with stirring, reflux condenser, and thermometer, and then dropwise add 38g of a mass percent concentration under stirring at room temperature and 150r / min Mix 8.4% ferric chloride solution with 33.64 g of potassium carbonate and sodium chloride mixed solution with a mass percentage concentration of 10.8% and a mass ratio of 1:1, and the mass ratio of iron and aluminum elements in the mixed solution is 1:6 , the amount of potassium carbonate and sodium chloride is 48.05% of the total mass of iron and aluminum elements;

[0022] 2) Continue to stir the above mixture for 30 minutes, and then continue to react for 4 hours under stirring at a temperature of 80°C and a speed of 150r / min to obtain a loose polyaluminum ferric chloride floccula...

Embodiment 3

[0024] A kind of preparation method of loose polyaluminum ferric chloride flocculant, the steps are as follows:

[0025] 1) Add 366g of polyaluminum chloride solution with a mass percent concentration of 10% in a 500ml four-necked bottle equipped with stirring, reflux condenser, and thermometer, and then add 27.5g of it dropwise under stirring at room temperature and at a speed of 150r / min Ferric chloride solution with a concentration of 10.9% is mixed with 12g of potassium chloride solution with a mass percentage concentration of 16.7%. The mass ratio of iron and aluminum elements in the mixed solution is 1:19, and the amount of potassium chloride is the total amount of iron and aluminum elements. 9.8% of mass;

[0026] 2) Continue to stir the above mixture for 30 minutes, and then continue to react for 4 hours under stirring at a temperature of 80°C and a speed of 150r / min to obtain a loose polyaluminum ferric chloride flocculant (No. TW-59).

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A preparation method of loose type polyaluminum ferric chloride flocculants includes the steps: mixing univalent soluble salt solution serving as loosening agents with polyaluminum chloride solution and ferric trichloride solution, and stirring for continuous reaction for 4h at a rotation speed of 150r / min at the temperature of 40-100 DEG C, so that the loose type polyaluminum ferric chloride flocculants can be obtained. The preparation method has the advantages that the flocculants not only have the excellent flocculation performance and a powerful charge neutralization function of polyaluminum chloride, but also have the advantages of ferric chloride, including high adsorbability, high sedimentation speed, large formed floccules and the like, are better than the ferric chloride in effluent color contamination and have the advantages of good coagulation effects, rapid action, less consumption, wide application range and the like. The base materials of polyaluminum chloride and ferric trichloride used in the method are sufficient in source, so that powerful support is provided for large-scale industrialization. The polyaluminum ferric chloride flocculants are ideal environment-friendly water-treatment flocculants as discharge of waste residues and wastes is basically avoided during production, and environmental pollution is reduced.

Description

technical field [0001] The invention relates to a treatment method for production and domestic water, in particular to a preparation method for a loose polyaluminum ferric chloride flocculant. Background technique [0002] The main treatment method for production and domestic water is to use flocculants, which mainly include aluminum salt series, iron salt series and polyaluminum ferric chloride. [0003] The early flocculants used to treat domestic water were mainly aluminum sulfate, which produced aluminum hydroxide colloids through hydrolysis to absorb suspended substances in water to achieve water purification effects. The water purification effect of aluminum sulfate is not ideal, and the later developed polyaluminum chloride (PAC) has a better flocculation effect. PAC forms alum flowers quickly in water, and the large particles are easier to precipitate, and the flocculation effect is better than that of traditional aluminum salts. PAC, like traditional aluminum salt...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C02F1/56C01F7/56
Inventor 陈树新卜显和栗方星张智李淼
Owner TIANJIN PIPELINE ENG GROUP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap