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Preparation method of composite flocculant

A composite flocculant, temperature control technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problem of low dosage, and achieve the effect of less sludge production, large molecular weight, and reduced dosage

Inactive Publication Date: 2013-11-20
SHANDONG JIANZHU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Inorganic-organic composite flocculants can take advantage of the advantages of inorganic and organic flocculants, overcome their respective shortcomings, and have the advantages of low dosage, wide application range, and economy. The new composite flocculant prepared for the composite of raw materials has not been reported in the literature

Method used

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  • Preparation method of composite flocculant

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Experimental program
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Effect test

Embodiment 1

[0019] (1) Take 24mL of liquid paraffin in a 250mL four-necked round bottom flask with a stirrer and a reflux condenser, place the flask in an ice-water bath, and control the temperature at 8°C ， And feed nitrogen into the flask for 15min (the flow rate is 0.5m 3 / h), then weigh 6.02 g of ethylenediamine into the round bottom flask (the mass ratio of ethylenediamine to liquid paraffin is 1:3), turn on the cooling water of the reflux condenser, and stir at G value of 150 S -1 While stirring, the temperature was raised to 25 °C, and 18.56 g of epichlorohydrin (the molar ratio of epichlorohydrin to ethylenediamine was 2:1) was slowly added dropwise with a separatory funnel for addition reaction, and the dropping time was 2.5 hours. Stirring was continued for 60 minutes after the addition was complete; the temperature was then lowered to 15°C. According to the molar ratio of trimethylamine and epichlorohydrin as 1:1.5, add a trimethylamine aqueous solution crosslinking agent with...

Embodiment 2

[0024] (1) Take 24mL of liquid paraffin in a 250mL four-necked round bottom flask with a stirrer and a reflux condenser, place the flask in an ice-water bath, and control the temperature at 5°C ， And feed nitrogen into the flask for 15 min, then weigh 6.02 g of ethylenediamine and add it to the round-bottomed flask, open the cooling water of the reflux condenser, and stir at a G value of 200 S -1 While stirring, the temperature was raised to 22 ° C, and 18.56 g of epichlorohydrin (the molar ratio of epichlorohydrin to ethylenediamine was 2:1) was slowly added dropwise with a separatory funnel for addition reaction, and the dropping time was 3 hours. Stirring was continued for 60 minutes after the addition was complete; the temperature was then lowered to 15°C. Add 33% trimethylamine aqueous solution crosslinking agent according to the molar ratio of trimethylamine and epichlorohydrin as 1:1.5; make the temperature rise to 90°C again, react at constant temperature for 5 hours, ...

Embodiment 3

[0029] (1) Take 24mL of liquid paraffin in a 250mL four-neck round bottom flask with a stirrer and a reflux condenser, place the flask in an ice-water bath, and control the temperature at 0°C ， And feed nitrogen into the flask for 15 min, then weigh 6.02 g of ethylenediamine and add it to the round-bottomed flask, open the cooling water of the reflux condenser, and stir at a G value of 250 S -1 While stirring, the temperature was raised to 20 °C, and 18.56 g of epichlorohydrin (the molar ratio of epichlorohydrin to ethylenediamine was 2:1) was slowly added dropwise with a separatory funnel for addition reaction, and the dropping time was 2 hours. Stirring was continued for 60 minutes after the addition was complete; the temperature was then lowered to 15°C. According to the molar ratio of trimethylamine and epichlorohydrin as 1:1.5, add 33% trimethylamine aqueous solution cross-linking agent, raise the temperature to 88°C again, react at constant temperature for 5 hours, and c...

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Abstract

The invention relates to a preparation method of a composite flocculant, which comprises the following steps: (1) preparing a polyepoxy chloropropane-ethylenediamine solution; (2) preparing a polyaluminum chloride solution; and (3) putting the polyepoxy chloropropane-ethylenediamine solution and the polyaluminum chloride solution in a weight ratio of 1:20-1:50 into an ultrasonic generator, and carrying out ultrasonic vibration to prepare the polyaluminum chloride-polyepoxy chloropropane-ethylenediamine composite flocculant. The polyaluminum chloride-polyepoxy chloropropane-ethylenediamine composite flocculant is prepared from the epoxy chloropropane, ethylenediamine and aluminum chloride. The flocculant belongs to a novel inorganic-organic high polymer flocculant, can be widely used as an efficient water treatment reagent for dyeing wastewater treatment, and has the advantages of high molecular weight, high stability, favorable decolorization effect and the like.

Description

technical field [0001] The invention relates to a preparation method of polyaluminum chloride-polyepichlorohydrin-ethylenediamine as an inorganic and organic composite flocculant, belonging to the field of flocculant preparation. Background technique [0002] The quality of the flocculant has a great influence on the treatment effect of the coagulation sedimentation process. Therefore, the research and development of new and efficient flocculants has always been an important pillar industry in the field of water treatment, and it is also the innovation of water industry and water pollution control engineering technology and equipment. basic industry for development. Inorganic-organic composite flocculants not only overcome the disadvantages of small flocs formed by inorganic flocculants, slow settling speed, and high dosage, but also overcome the shortcomings of high cost of organic flocculants, and become a hot spot in the development of flocculants. [0003] Polyaluminum ...

Claims

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Application Information

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IPC IPC(8): C02F1/52C02F1/56C08G73/02
Inventor 孙翠珍孙玉林张志斌张彦浩武道吉董芳张晓蕊邹彦江
Owner SHANDONG JIANZHU UNIV
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