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Ammonium salt sewage treatment flocculant

A technology for sewage treatment and flocculant, applied in water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, textile industry wastewater treatment, etc. question

Inactive Publication Date: 2021-06-04
成都高云智新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chitosan is the product of chitin after deacetylation reaction, and chitin widely exists in crustaceans such as shrimps, natural reserves second only to cellulose crabs, shells of insects and cell walls of higher plants, etc. However, chitosan also has many problems, such as small relative molecular weight, poor bridging ability, inactive chemical properties, and poor solubility. Therefore, it has been modified by grafting. Chitosan products often have low branching rate, and the flocculation effect is sensitive to pH, which limits the application of chitosan materials in flocculants.

Method used

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  • Ammonium salt sewage treatment flocculant
  • Ammonium salt sewage treatment flocculant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of ammonium salt sewage treatment flocculant, its specific scheme is as follows:

[0025] 20g of methacryloyloxyethyltrimethylammonium chloride, 0.05g of 3-(aminomethyl)-1-allylpyrazole, 0.5g of 2-(allyloxymethyl)- 18-crown-6-ether, 10g of urea-modified chitosan, added to the reactor, protected by high-purity nitrogen, and 50g of hydrogen-containing silicone oil CAS: 63148-57-2, 150g of tetrahydrofuran, 5g of mass percent Add 3% isopropanol solution of chloroplatinic acid dropwise into the reaction kettle, use high-purity nitrogen protection, control the temperature at 60°C, stir for 2 hours, distill the reaction mixture under reduced pressure to remove tetrahydrofuran, and then obtain the ammonium salt Sewage treatment flocculant.

[0026] Described modified chitosan is a kind of urea modified chitosan, and its preparation method is as follows:

[0027] Mix 15g of chitosan with 150g of acetic acid solution with a concentration of 1% by mass and stir evenly, th...

Embodiment 2

[0034] A kind of ammonium salt sewage treatment flocculant, its specific scheme is as follows:

[0035] With 23g of methacryloxyethyltrimethylammonium chloride, 0.3g of 3-(aminomethyl)-1-allylpyrazole, 0.8g of 2-(allyloxymethyl)- 18-crown-6-ether, 14g of urea-modified chitosan, added to the reactor, protected by high-purity nitrogen, and 60g of hydrogen-containing silicone oil CAS: 63148-57-2, 160g of tetrahydrofuran, 7g by mass The isopropanol solution of chloroplatinic acid with a content of 3-7% is added dropwise into the reaction kettle, protected by high-purity nitrogen, controlled at a temperature of 65° C., stirred for 2.5 hours, and the reaction mixture is distilled off under reduced pressure to remove tetrahydrofuran to obtain the one A flocculant for ammonium salt sewage treatment.

[0036] Described modified chitosan is a kind of urea modified chitosan, and its preparation method is as follows:

[0037]18g of chitosan and 180g of mass percent concentration of 3% a...

Embodiment 3

[0044] A kind of ammonium salt sewage treatment flocculant, its specific scheme is as follows:

[0045] With 30g of methacryloxyethyltrimethylammonium chloride, 0.5g of 3-(aminomethyl)-1-allylpyrazole, 1.2g of 2-(allyloxymethyl)- 18-crown-6-ether, 17g of urea-modified chitosan, added to the reactor, protected by high-purity nitrogen, and 70g of hydrogen-containing silicone oil CAS: 63148-57-2, 170g of tetrahydrofuran, 10g by mass Add the isopropanol solution of chloroplatinic acid with a content of 7% dropwise into the reaction kettle, use high-purity nitrogen protection, control the temperature at 70°C, stir for 4 hours, distill the reaction mixture under reduced pressure to remove tetrahydrofuran, and then obtain the ammonium salt Sewage treatment flocculant.

[0046] Described modified chitosan is a kind of urea modified chitosan, and its preparation method is as follows:

[0047] 20g chitosan and 200g mass percentage concentration are 5% acetic acid solution mixing and s...

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Abstract

The invention relates to the field of sewage treatment, in particular to an ammonium salt sewage treatment flocculant. The preparation method comprises the following steps: grafting carboxyl anions on cyano groups of chitosan molecules by using chloroacetic acid, then carrying out free radical polymerization by using a quaternary ammonium salt cationic monomer, and grafting a long-chain cationic unit to prepare the chitosan flocculant with an amphoteric structure. According to the invention, the steric hindrance during free radical polymerization of the cationic monomer is reduced, the grafting rate of a long-chain cationic unit is increased, the flocculant fully plays a sufficient charge attraction role, the bridging capability of molecules is improved, and the electrostatic adsorption capability and flocculation effect of the flocculant material are improved; secondly, the reactivity of chitosan molecules is improved, so that the situation that the flocculating agent only swells and loses the flocculation capacity due to self-crosslinking of long-chain cation units is prevented. The chitosan flocculant belongs to a natural polymer material, and has the advantages of high efficiency, environmental protection, low cost and the like.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to an ammonium salt sewage treatment flocculant. Background technique [0002] In recent years, with the intensification of water pollution, the research on flocculation technology has made great progress in all aspects, showing a very active development trend, and is facing a breakthrough. According to the research content, flocculation can be roughly divided into three research directions, including flocculation chemistry, flocculation physics and flocculation process. [0003] CN102786122A discloses a flocculant, mainly polyaluminum chloride as a raw material, characterized in that: polyphosphorus ferric chloride is mixed in the above components, and the amount of polyphosphorus ferric chloride is 10-30% of the mass of polyaluminum chloride share. The advantages of the present invention are: high degree of polymerization of silicic acid and metal ions can produce a good coagulat...

Claims

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Application Information

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IPC IPC(8): C02F1/56C08G77/388C08B37/08C02F101/16C02F103/30
CPCC02F1/56C02F2101/16C02F2103/30C08B37/003C08G77/388
Inventor 陈国晓
Owner 成都高云智新材料科技有限公司
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