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Preparation method of polyaluminium sulfate zinc composite flocculant

A composite flocculant, polyaluminum sulfate technology, applied in the field of environment and chemistry, can solve problems such as aluminum poisoning symptoms, toxic effects, and aluminum harm to human body, and achieve the effects of less dosage, long shelf life and fast settling speed.

Inactive Publication Date: 2014-01-08
SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aluminum salts are often used as coagulants in water treatment, but residual aluminum is harmful to the human body, leading to aluminum poisoning symptoms, and also has toxic effects on aquatic organisms and plants

Method used

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  • Preparation method of polyaluminium sulfate zinc composite flocculant
  • Preparation method of polyaluminium sulfate zinc composite flocculant
  • Preparation method of polyaluminium sulfate zinc composite flocculant

Examples

Experimental program
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Effect test

Embodiment 1

[0019] At room temperature, mix 40 parts of zinc sulfate aqueous solution with a mass percentage concentration of 0.5% and 60 parts of aluminum sulfate aqueous solution with a mass percentage concentration of 10%, and add 15 parts of a 50% sodium hydroxide aqueous solution dropwise on a magnetic heating stirrer. , stirred for 30 min, and stood still for 0.5 h to obtain a clear polyaluminum chloride zinc composite flocculant, which was dried at 50°C to produce a semi-crystalline white solid, that is, a polyaluminum zinc sulfate composite flocculant.

Embodiment 2

[0021] At room temperature, 50 parts of zinc sulfate aqueous solution with a concentration of 1% by mass and 60 parts of aqueous aluminum sulfate with a concentration of 15% by mass were mixed, and 25 parts of aqueous sodium hydroxide solution with a concentration of 50% were added dropwise on a magnetic heating stirrer. , stirred for 30 min, and stood still for 2.0 h to obtain a clear and transparent polyaluminum-zinc sulfate composite flocculant, which was dried at 50°C to produce a semi-crystalline white solid, that is, a polyaluminum-zinc sulfate composite flocculant.

Embodiment 3

[0023] At room temperature, 40 parts of zinc sulfate aqueous solution with a concentration of 0.75% by mass and 50 parts of aqueous aluminum sulfate with a concentration of 10% by mass were mixed, and 40 parts of aqueous potassium hydroxide with a concentration of 50% were added dropwise on a magnetic heating stirrer. , stirred for 30 min, and stood still for 6.0 h to obtain a clear and transparent polyaluminum-zinc sulfate composite flocculant, which was dried at 50°C to produce a semi-crystalline white solid, that is, a polyaluminum-zinc sulfate composite flocculant.

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Abstract

The invention relates to a preparation method of a polyaluminium sulfate zinc composite flocculant, and belongs to the field of synthesis of flocculants for environmental protection engineering. The preparation method of the polyaluminium sulfate zinc composite flocculant comprises the following steps: respectively preparing aluminium salt and zinc salt into solutions with certain concentrations at a room temperature, mixing according to a certain zinc-aluminium mass percent, slowly dropwise adding a pH conditioning agent solution with a certain concentration on a magnetic heating stirrer, stirring for 15-30 minutes so as to obtain a stable clear colorless polyaluminium sulfate zinc composite flocculant, and drying at 50 DEG C, thus obtaining hypocrystalline white solids. The polyaluminium sulfate zinc composite flocculant has the advantages of low dosage, large and dense alumen ustum, fast settling velocity and few aluminium metal ion residues and can stabilize for one year. The polyaluminium sulfate zinc composite flocculant prepared by the method can be used for treating drinking water, raw water and wastewater and has no toxic or side effect. The preparation method of the polyaluminium sulfate zinc composite flocculant has the advantages of simple production process, simple production equipment, low production cost, good flocculation effect, low investment cost and the like.

Description

technical field [0001] The invention relates to the technical fields of environment and chemistry, in particular to a preparation method of a polyaluminum-zinc sulfate composite flocculant. Background technique [0002] Inorganic polymer flocculants are a new generation of flocculants developed after the 1960s. They have better performance than traditional inorganic salt flocculants such as aluminum sulfate and ferric chloride, and are cheaper than organic polymer flocculants such as polyacrylamide. , and gradually become the mainstream flocculant. [0003] At the same time, with the continuous development of flocculation technology, the research and development of high-efficiency composite flocculants has gradually become a hot spot in current flocculant research: not only is it required that the flocculant not only has excellent flocculation performance, but also has the functions of sterilization, decolorization, and corrosion inhibition. and other functions. In order t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 吴彦瑜彭晓春
Owner SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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