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A kind of composite polymer flocculant and preparation method thereof

A technology of composite polymer and flocculant, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problem of limited flocculation capacity, achieve high Zeta potential positive charge, overcome poor flocculation effect, and good water solubility.

Inactive Publication Date: 2017-09-15
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its own flocculation ability is still limited, especially under alkaline conditions, and it needs to be modified.

Method used

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  • A kind of composite polymer flocculant and preparation method thereof
  • A kind of composite polymer flocculant and preparation method thereof
  • A kind of composite polymer flocculant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: the preparation of cationic dextran cross-linked chitosan flocculant with higher degree of etherification:

[0031] (1) Dissolve 3.24g of dextran evenly in 10 mL of distilled water containing 1.5 g of sodium hydroxide, and add 0.02 mol of cationic etherifying agent dropwise into the dextran solution at 60°C, (drop about 20 min) and then the reaction was carried out for 12 h. The cationic dextran solution obtained after the reaction was added dropwise into 90% ethanol solution, and the vacuum distillation device was used for suction filtration to obtain the precipitated white cationic dextran solid. Then use ethanol solution to wash 2-3 times.

[0032] (2) Add the cationic dextran solution obtained after the reaction dropwise into 90% ethanol solution, and perform suction filtration with a vacuum distillation device to obtain the precipitated white cationic dextran solid. Then use ethanol solution to wash 2-3 times.

[0033] (3) Weigh 0.7 g of the cation...

Embodiment 2

[0037] Embodiment 2: Preparation of cationic dextran cross-linked chitosan flocculant with moderate degree of etherification:

[0038] The specific steps are as follows:

[0039] (1) Dissolve 3.24g of dextran evenly in 10 mL of distilled water containing 1.5 g of sodium hydroxide, and add 0.015 mol of cationic etherifying agent dropwise into the dextran solution at 60°C, (drop about 20 min) and then the reaction was carried out for 8 h. The cationic dextran solution obtained after the reaction was added dropwise into 90% ethanol solution, and the vacuum distillation device was used for suction filtration to obtain the precipitated white cationic dextran solid. Then use ethanol solution to wash 2-3 times.

[0040] (2) Add the cationic dextran solution obtained after the reaction dropwise into 90% ethanol solution, and perform suction filtration with a vacuum distillation device to obtain the precipitated white cationic dextran solid. Then use ethanol solution to wash 2-3 tim...

Embodiment 3

[0044] Example 3: Preparation of cationic dextran cross-linked chitosan flocculant with lower degree of etherification

[0045] Concrete step embodiment is as follows:

[0046] (1) Dissolve 3.24g of dextran evenly in 10 mL of distilled water containing 1.5 g of sodium hydroxide, and add 0.005 mol of cationic etherifying agent dropwise to the dextran solution at 60°C, (drop about 20 min) and then the reaction was carried out for 8 h. The cationic dextran solution obtained after the reaction was added dropwise into 90% ethanol solution, and the vacuum distillation device was used for suction filtration to obtain the precipitated white cationic dextran solid. Then use ethanol solution to wash 2-3 times.

[0047] (2) Add the cationic dextran solution obtained after the reaction dropwise into 90% ethanol solution, and perform suction filtration with a vacuum distillation device to obtain the precipitated white cationic dextran solid. Then use ethanol solution to wash 2-3 times. ...

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Abstract

The invention discloses a composite polymer flocculant and a preparation method thereof, belonging to the technical field of composite materials. First, use 3-chloro-2-hydroxypropyltrimethylammonium chloride as the etherification agent to cationize the dextran, and then use the cross-linking and blending method to cross-link and blend the cationic dextran and chitosan reaction to prepare chitosan-cationic dextran composite polymer flocculant. The flocculant of the invention has high-efficiency flocculation effect on simulated kaolin wastewater and actual wastewater, has wide pH applicability, and has good application prospects in the field of sewage treatment.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a composite polymer flocculant and a preparation method thereof. Background technique [0002] With the rapid development of modern industry, the massive discharge of industrial waste water, mine waste water, domestic waste water and the blind use of pesticides and fertilizers in agriculture have caused serious pollution of water bodies and seriously affected people's health and normal life. Therefore, the problem of sewage treatment has become an urgent problem to be solved. Among them, as the first step of water treatment, the flocculation of sewage is particularly important. Flocculation has the functions of removing organic matter in water, reducing turbidity and color of sewage, and reducing heavy metals and radioactive substances in water. Although there are many flocculants currently on the market, and there is no shortage of flocculants with good ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L5/08C08L5/02C08J3/24C08B37/02C02F1/52
Inventor 张其清游力军宋立岛王傲
Owner FUZHOU UNIV
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