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Compounded cationic flocculant and preparation method thereof

A cationic flocculant and anion technology, applied in the field of compound cationic flocculant and its preparation, can solve the problems that PDMDAAC cannot well meet the requirements of sewage treatment, unindustrialization, etc., and achieve obvious decolorization performance, environmental friendliness, and production cost. low effect

Active Publication Date: 2014-10-08
DALIAN RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this synthetic new monomer has not been industrialized so far.
[0004] With the complexity of sewage components, a single PDMDAAC can no longer meet the requirements of sewage treatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 50.00 g of acrylic acid, 5.00 g of vinyl isobutyl ether, 5.50 g of V50 and 500 ml of deionized water into a 1000 ml four-necked flask equipped with a mechanical stirrer, a thermometer, a condenser tube and a nitrogen inlet. After 1 min, the temperature was raised, and the reaction was carried out at 50°C for 10 h and at 80°C for 5 h to obtain copolymer A1.

Embodiment 2

[0025] Weigh 50.00 g of acrylic acid, 10.00 g of vinyl isobutyl ether and 250 ml of deionized water into a 1000 ml four-neck flask equipped with a mechanical stirrer, a thermometer, a condenser tube and a nitrogen inlet, and pass nitrogen gas under stirring for 30 minutes to remove oxygen and then raise the temperature At 50°C, 140.00 g of 5% ammonium persulfate solution was added dropwise at this temperature, reacted at this temperature for 8 h, and then reacted at 80°C for 2 h to obtain copolymer A2.

Embodiment 3

[0027] Weigh 50.00 g of 2-methyl-2-acrylamido-1-propanesulfonic acid, 15.00 g of vinyl isobutyl ether, 1.60 g of ammonium persulfate and 320 ml of deionized water in 1000 ml equipped with mechanical stirring, thermometer, In the four-necked flask with the condenser tube and nitrogen inlet, pass nitrogen gas under stirring for 30 minutes to remove oxygen, then raise the temperature to 40°C, add 16.00 g of 5% sodium bisulfite aqueous solution, react at this temperature for 3 hours, and react at 45°C for 3 hours, React at 60°C for 3h, at 70°C for 2h, and at 82°C for 1h to obtain copolymer 3.

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Abstract

The invention relates to a compounded cationic flocculant and a preparation method thereof. The flocculant is a cationic flocculant which is prepared from compounded dimethyl diallyl ammonia chloride as a main component and hydrophobic anionic copolymer. The hydrophobic anionic copolymer is used as a viscosity regulating agent and is added into a polydimethyl diallyl ammonia chloride solution; due to adoption of the anion and the hydrophobic groups, the interaction of the flocculant with organic matters in sewage is improved, and the performance of the flocculant is improved. The hydrophobic anion can form an amphoteric polymer with hydrophobic groups together with dimethyl diallyl ammonia chloride, so that a product is wide in application range and can be used in both acid and alkali mediums. The compounded cationic flocculant provided by the invention is a liquid, has the advantages of low production cost, high dissolution speed, environmental friendliness, energy conservation, consumption reduction, convenience in use and the like, is remarkable in decoloring chemical fiber sewage, is large and dense in floc and is high in sedimentation velocity.

Description

technical field [0001] The invention relates to a compound cationic flocculant and a preparation method thereof. It specifically relates to the compounding of polydimethyldiallylammonium chloride and water-soluble hydrophobic anion polymer, and the prepared copolymer is mainly used in water treatment, oil recovery and other fields, and belongs to the chemical technology field. Background technique [0002] Flocculant plays a very important role in water treatment. It can not only reduce the sensory indicators such as turbidity and color of raw water, remove various organic substances, some heavy metals and radioactive substances, but also is often used in the concentration process before sludge dehydration , to improve the dewatering performance of sludge. Synthetic organic polymer flocculants have an absolute advantage in the market due to their large molecular weight and many functional groups in the molecular chain. Among them, polyacrylamide series are the most widely u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56C08F126/02C08F265/02C08F265/10C08F267/02C08F226/02
Inventor 高玉荣董武卿
Owner DALIAN RES & DESIGN INST OF CHEM IND
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