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Organic high polymer coagulant and preparation method thereof

An organic polymer and flocculant technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of secondary pollution, low storage stability, not in line with green chemistry and environmental protection, etc. The effect of uniform charge distribution and improved wastewater treatment effect

Inactive Publication Date: 2008-08-27
SICHUAN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But above-mentioned polymer flocculant of synthesis still has some different defectives: 1, synthetic polymer flocculant has selected the big monomer of toxicity such as acrylamide, acrylic acid (salt), maleic acid (anhydride), so polymerization residue Both body and decomposed small molecules will cause secondary pollution; 2. Mannich modified polyacrylamide zwitterionic polymer flocculant is not suitable for treating wastewater with high pH, ​​and its storage stability is not high; 3. From green From the perspective of chemical environmental protection, the Mannich reaction does not meet the requirements of green chemical environmental protection

Method used

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  • Organic high polymer coagulant and preparation method thereof
  • Organic high polymer coagulant and preparation method thereof
  • Organic high polymer coagulant and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Step 1. In a 250mL four-neck reactor equipped with a thermometer, a nitrogen device and an agitator, add 51g of distilled water, 3g of itaconic acid (salt) and 1.8g of sodium hydroxide, then add 0.0086g of hexamethylenediaminetetraacetic acid Sodium, start stirring, then add 7g of tertiary ammonium (alkyl) acrylate dialkylaminoethyl ester, stir in vacuum, pass nitrogen, and heat up to 40°C;

[0043] Step 2, under the conditions of continuous stirring and nitrogen flow, start to slowly add 33g of quaternized alkyl acrylate dialkylaminoethyl, add redox initiator potassium persulfate and sulfite equivalent to 0.4% of the total mass of the monomer 0.0464g of the sodium bisulfate mixture initiates the copolymerization of the two monomers and keeps the temperature for 4h;

[0044] Step 3, heat up to 80°C, add 0.0215g of water-soluble azo initiator azobisisobutylamidine hydrochloride equivalent to 0.05% of the total mass of monomers, continue to react for 4h, cool to normal te...

Embodiment 2

[0046] Step 1. In a 250mL four-neck reactor equipped with a thermometer, a nitrogen device and an agitator, add 73g of distilled water, 5g of itaconic acid (salt) and 3.07g of sodium hydroxide, then add 0.0066g of hexamethylenediaminetetraacetic acid Sodium, start stirring, then add 9g of tertiary ammonium (alkyl) acrylate dialkylaminoethyl ester, stir in vacuum, pass nitrogen, and heat up to 40°C;

[0047] Step 2, under the conditions of continuous stirring and nitrogen flow, start to slowly add 19g of quaternized alkyl acrylate dialkylaminoethyl ester dropwise, add redox initiator potassium persulfate and sulfite which are equivalent to 0.35% of the total mass of monomers 0.0311g of sodium bisulfate mixture initiates the copolymerization of two monomers, and keeps warm for 4h;

[0048] Step 3, heat up to 80°C, add 0.0165g of water-soluble azo initiator azobisisobutylamidine hydrochloride equivalent to 0.05% of the total mass of monomers, continue to react for 4h, cool to nor...

Embodiment 3

[0050] Step 1. In a 250mL four-neck reactor equipped with a thermometer, a nitrogen device and an agitator, add 62g of distilled water, 5g of itaconic acid (salt) and 3g of sodium hydroxide, then add 0.0405g of sodium hexamethylenediaminetetraacetate , start stirring, then add 9 g of tertiary ammonium (alkyl) acrylate dialkylaminoethyl ester, stir in vacuum, pass nitrogen, and heat up to 40 ° C;

[0051] Step 2, under the conditions of continuous stirring and nitrogen flow, start to slowly add 31g of quaternized alkyl acrylate dialkylaminoethyl, add redox initiator potassium persulfate and sulfite equivalent to 0.4% of the total mass of the monomer 0.0464g of the sodium bisulfate mixture initiates the copolymerization of the two monomers and keeps the temperature for 4h;

[0052] Step 3, heat up to 80°C, add 0.0228g of water-soluble azo initiator azobisisobutylamidine hydrochloride equivalent to 0.05% of the total mass of monomers, continue to react for 4h, cool to normal temp...

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Abstract

The invention relates to an organic polymer flocculating agent and a process for preparation thereof, in particular to a water-soluble polymer flocculating agent and a process for preparation thereof. The molecular weight of the water-soluble polymer flocculating agent is 1*10 4-1*10 6, and the flocculating agent is formed through mixing and copolymerization of three monomers of itaconate, quaternized alkyl acrylic dialkyl aminoethyl ester and tertiary amine alkyl acrylic dialkyl aminoethyl ester, a certain amount of polymerization promoter is added, previously redox initiator is employed, and latterly water-soluble azo type initiator is added, thereby guaranteeing sufficiently high molecular weight of the flocculating agent, increasing conversion rate and reducing monomer content. The monomers selected by the product are nontoxic, and the process for preparation is simple and is suitable for promotion and application, under the condition of unchanging the anion degree, the cationic degree can be freely regulated, and the application range is enabled to be wider. The flocculating agent combines the advantages of the three monomers; thereby the performance of the flocculating agent is more excellent with more varieties of processed wastewater, less input amount and more obvious social and economical benefits.

Description

technical field [0001] The invention relates to an organic polymer flocculant and a preparation method thereof, in particular to a water-soluble organic polymer flocculant and a preparation method thereof. Background technique [0002] Existing flocculants play an important role in the solid-liquid separation of water and wastewater treatment and production processes. In the application practice of water treatment, domestic and foreign hydrometallurgy, petrochemical, papermaking, steel, textile, printing and dyeing, food, brewing and other industries of wastewater treatment, the proportion of water treatment using flocculation method accounts for about 55% to 75% . The water industry almost 100% uses flocculation as a means of water purification. Because the flocculation method has obvious technical and economic benefits in water treatment and sludge dewatering, the production and consumption of foreign polymer flocculants still maintain an annual growth rate of about 6.5%...

Claims

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Application Information

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IPC IPC(8): C02F1/56C08F220/34C08F4/40
Inventor 朱明廖乾邑张春晓宁海峰
Owner SICHUAN NORMAL UNIVERSITY
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