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Preparation method for anion chitosan-based flocculant

A technology of chitosan and flocculants, which is applied in the field of preparation of anionic chitosan-based flocculants, can solve problems such as complex preparation processes, and achieve the effects of simple operation, high production efficiency, good social and economic benefits

Inactive Publication Date: 2019-03-01
CHONGQING TECH & BUSINESS UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the advantages of no pollution, no toxicity, etc., but its preparation process is relatively complicated, and the removal effect of the prepared flocculant treatment antibiotics is only 32%~66.2%

Method used

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  • Preparation method for anion chitosan-based flocculant

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Anionic chitosan-based flocculants were prepared in the following manner:

[0027] 1) Weigh a certain amount of chitosan and place it in pure water, stir until the chitosan is evenly dispersed, then slowly add glacial acetic acid dropwise into the reactor and continue to stir rapidly, controlling the mass ratio of chitosan to glacial acetic acid to be 2 : 1; after the chitosan was completely dissolved, a chitosan solution with a concentration of 3.5% was obtained.

[0028] 2) Add 4.5:1 AM and AMPS monomers into the reactor and continue to stir until the two are completely dissolved. Control the total mass fraction of chitosan, AM and AMPS in pure water to 40%. Chitosan and AM The mass ratio of the sum of AMPS and AMPS is 1:2.

[0029] 3) Feed N into the reactor 2 Oxygen was driven for 15 min, and at the same time, 3 mL of cerium ammonium nitrate initiator with a concentration of 0.1 mol / L was added at 10 min.

[0030] 4) Stir the reactor for 5 minutes under anaerobic...

Embodiment 2

[0032] Anionic chitosan-based flocculants were prepared in the following manner:

[0033] 1) Weigh a certain amount of chitosan and place it in pure water, stir until the chitosan is evenly dispersed, then slowly add glacial acetic acid dropwise into the reactor and continue to stir rapidly to control the mass ratio of chitosan to glacial acetic acid to 1.5 : 1; after the chitosan is completely dissolved, a chitosan solution with a concentration of 4% is obtained.

[0034] 2) Add 5:1 AM and AMPS monomers into the reactor and continue to stir until the two are completely dissolved. Control the total mass fraction of chitosan, AM, and AMPS in pure water to 40%. Chitosan and AMPS The mass ratio of the sum of AM and AMPS is 1:2.

[0035] 3) Feed N into the reactor 2 Oxygen was driven for 15 min, and at the same time, 2 mL of cerium ammonium nitrate initiator with a concentration of 0.1 mol / L was added at 10 min.

[0036] 4) Stir the reactor for 5 minutes under anaerobic conditi...

Embodiment 3

[0038] Anionic chitosan-based flocculants were prepared in the following manner:

[0039] 1) Weigh a certain amount of chitosan and place it in pure water, stir until the chitosan is evenly dispersed, then slowly add glacial acetic acid dropwise into the reactor and continue to stir rapidly, controlling the mass ratio of chitosan to glacial acetic acid to be 2 : 1; after the chitosan was completely dissolved, a chitosan solution with a concentration of 4% was obtained.

[0040]2) Add 8:1 AM and AMPS monomers into the reactor and continue to stir until the two are completely dissolved. Control the total mass fraction of chitosan, AM, and AMPS in pure water to 40%. Chitosan and AMPS The mass ratio of the sum of AM and AMPS is 1:3.

[0041] 3) Feed N into the reactor 2 Oxygen was driven for 15 min, and at the same time, 2 mL of cerium ammonium nitrate initiator with a concentration of 0.1 mol / L was added at 10 min.

[0042] 4) Stir the reactor for 5 minutes under anaerobic con...

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Abstract

The invention discloses a preparation method for an anion chitosan-based flocculant. The preparation method comprises the following steps: taking chitosan and 2-acrylamide-2-methallyl sulfonate (AMPS)as raw materials and taking acrylamide as a crosslinking agent; adding the three materials into a reactor, adding a defined amount of water, fully uniform mixing the three materials and fully dissolving under the condition of quick stirring; introducing nitrogen and removing interference of oxygen, and adding ceric ammonium nitrate initiator; placing the reactor under the temperature at 35-45 DEGC and reacting for 2-4h; curing after the ending of reaction, and then extracting and purifying the product, thereby acquiring the anion chitosan-based flocculant with sulfonic acid group. The preparation method disclosed by the invention is simple, with reaction stability, easiness in control and few side effects. The acquired modified chitosan flocculant has excellent solubility and flocculating performance, has an excellent treatment effect to hematite wastewater and is an efficient water treatment flocculant.

Description

technical field [0001] The invention belongs to the technical field of flocculants, and in particular relates to a preparation method of an anionic chitosan-based flocculant. Background technique [0002] Coagulation is widely used in water treatment because of its simplicity and cost-effectiveness. The main reagent of the coagulation method is a flocculant, and the processing capacity of the flocculant determines the quality of the water treatment effect. Flocculants mainly include inorganic flocculants, organic polymer flocculants, natural organic polymer flocculants and microbial flocculants. Among them, the natural organic polymer flocculant is a kind of organic polymer flocculant prepared by chemically modifying natural polymers such as starch, cellulose, shells, etc., which mainly includes: starch flocculant, cellulose flocculant , Sodium alginate flocculant, chitosan flocculant. Chitosan itself is non-toxic and easily degraded, and has broad application prospects i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00C08F220/58C08F220/56C02F1/56
CPCC02F1/56C08F251/00C08F220/58C08F220/56
Inventor 唐晓旻黄廷张世欣郑洁王韬
Owner CHONGQING TECH & BUSINESS UNIV
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