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Inorganic and modified chitosan composite polymer flocculant

A polymer flocculant and chitosan technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of low solubility and poor flocculation performance, and achieve the effects of wide molecular weight distribution, less secondary pollution, and various structures

Inactive Publication Date: 2015-12-09
武汉宏安伟立科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, chitosan has the disadvantages of low solubility at room temperature and poor flocculation performance, so we usually use both after modification.

Method used

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  • Inorganic and modified chitosan composite polymer flocculant
  • Inorganic and modified chitosan composite polymer flocculant
  • Inorganic and modified chitosan composite polymer flocculant

Examples

Experimental program
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Embodiment 1

[0030] Example 1, by reacting with acrylamide:chitosan at a mass ratio of 2:1 at 50°C for 3 hours, the amount of the initiator used accounts for 0.02 part of the total mass of the solid to prepare the raw solution. When in use, dilute the stock solution 10 times. Compared with the conventional flocculant of the same concentration, see Table 1.

[0031]

[0032]

[0033] Table 1

[0034]

[0035] Table 2

[0036] Through the above examples, compared with conventional inorganic flocculants and organic flocculants, it has obvious advantages in the removal of the chromaticity of wastewater and the removal of suspended solids in water; compared with pure chitosan flocculants, copolymer flocculation The agents make their respective functions better coordinated, effectively improve the flocculation effect, and have obvious effects on decolorization and turbidity removal.

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Abstract

The invention relates to an inorganic and modified chitosan composite polymer flocculant. The inorganic and modified chitosan composite polymer flocculant is characterized in that chitosan which is modified through polyacrylamide serves as the raw material, methacryloyloxyethyl trimethyl ammonium chloride, maleic acid and ceric ammonium nitrate serve as initiating agents, modified chitosan copolymer is synthesized under the weakly acidic condition, and the modified chitosan copolymer, polymerization ferric chloride and aluminum polychlorid are mixed together to prepare the composite polymer flocculant. In the preparation steps, the mass ratio of modified starch to the chitosan is 1-2 to 1, the reaction temperature ranges from 50 DEG C to 60 DEG C, the reaction time ranges from 2 h to 3 h, and the dosage of the initiating agents accounts for 0.02 part of the total mass of the whole system. The inorganic and modified chitosan composite polymer flocculant prepared through the method has the advantages of being efficient, low in cost and small in secondary pollution to the environment; according to sewage with different types, compared with a conventional flocculant, by means of the inorganic and modified chitosan composite polymer flocculant, the sewage decolourization ratio and the removal rate of turbidity can reach above 99 percent under the condition that the use amount of the flocculant is less.

Description

technical field [0001] The invention relates to an inorganic-modified chitosan composite polymer flocculant, which belongs to the technical field of water treatment flocculation. Background technique [0002] Domestically commonly used water treatment flocculants are mainly divided into two categories: inorganic flocculants and organic flocculants. Inorganic flocculants are mainly polyaluminum chloride and polyferric chloride-based flocculants. The principle is that through the collision of coagulated solids, the hydrolyzed products are agglomerated and bridging flocculated to form settleable or filterable flocculation. substances, in order to achieve the purpose of purifying water quality. However, the iron-containing flocculant brings iron ions into the system, which is easy to cause corrosion of equipment, and there are trace iron ions in the treated water, which has a certain chroma. The treatment effect of aluminum-containing flocculants is slightly better than that o...

Claims

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Application Information

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IPC IPC(8): C02F1/52C02F1/56
Inventor 孙磊
Owner 武汉宏安伟立科技有限公司
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