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Cation type polymer flocculating agent and its preparation method

A polymer flocculant and cationic technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of poor flocculation bridging ability and low molecular weight of flocculants, and achieve less slag, good flocculation effect and good effect Effect

Inactive Publication Date: 2005-03-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flocculant obtained by this method has the disadvantages of low molecular weight, poor flocculation and bridging ability, etc.

Method used

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  • Cation type polymer flocculating agent and its preparation method
  • Cation type polymer flocculating agent and its preparation method
  • Cation type polymer flocculating agent and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In a 500ml four-neck flask equipped with a stirrer, a thermometer, a feeding tube, and a nitrogen inlet and outlet, add 15.7g of dimethylaminoethyl methacrylate, add 15ml of 1N HCl, adjust the pH value to 5.5, and then add acrylamide 28.4 g, 400ml of deionized water, after mixing evenly, blow nitrogen to remove oxygen, add initiator potassium persulfate 10-4mol / L, react in 50°C water bath for 6 hours, and obtain flocculant-1.

Embodiment 2

[0020] In a 500ml four-neck flask equipped with a stirrer, a thermometer, a feeding tube, and a nitrogen inlet and outlet, add 37.68g of dimethylaminoethyl methacrylate, add 45ml of 1N HCl, adjust the pH value to 4.0, and then add acrylamide 4.26 g, 440ml of deionized water, after mixing evenly, pass nitrogen to remove oxygen, add initiator ammonium persulfate 5×10 -4 mol / L, initiator sodium sulfite 2×10 -5 mol / L, react in a 35°C water bath for 3 hours, and then react in a 80°C water bath for 2 hours to obtain Flocculant-2.

Embodiment 3

[0022] In a 500ml four-neck flask equipped with a stirrer, a thermometer, a feeding tube, and a nitrogen inlet and outlet, add 28.8g of dimethylaminoethyl methacrylate, add 30ml of 1N HCl, adjust the pH value to 7.0, and then add acrylamide 16.9 g, 400ml of deionized water, after mixing evenly, pass nitrogen to remove oxygen, add initiator ammonium persulfate 4×10 -4 mol / L, in a 45°C water bath, react for 5.5 hours to obtain flocculant-3.

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Abstract

A high-molecular cationic flocculant is prepared from acrylamide, dimethylaminoethyl methylacrylate, hydrochloric acid and deionized water through polymerizing reaction in aqueous solution mode under the action of trigger.

Description

technical field [0001] The invention relates to an organic flocculant and a preparation method thereof, in particular to a cationic polymer flocculant and a preparation method thereof. Background technique [0002] Water treatment flocculation technology refers to the addition of flocculants in wastewater to remove COD, chroma, suspensions, etc. from colloids, suspended solid liquids, and dissolved organics in the water through physical and chemical actions, so that the water quality of wastewater can be improved. get cleansed. At present, polyaluminum chloride is widely used. The main disadvantages are large dosage, large floc volume, slow sedimentation speed, difficult dehydration, low efficiency and high treatment cost. [0003] In recent years, organic polymer flocculants have developed rapidly, and have the advantages of many varieties, less dosage, less slag, easy solid-liquid separation, and reduced equipment corrosion. They occupy an increasingly important position ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56
Inventor 王有华杨丽黄玉洪赵景霞回军韩建华
Owner CHINA PETROLEUM & CHEM CORP
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