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Polyaluminum ferric chloride-polyepichlorohydrin-ethylene diamine preparation method

A technology of polyepichlorohydrin and polyaluminum ferric chloride, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc., to achieve the effects of dense alum flowers, reduced dosage, and fast reaction speed

Inactive Publication Date: 2013-11-27
SHANDONG JIANZHU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, there are no reports in the literature about the new composite flocculant prepared by compounding polyaluminum ferric chloride and polyepichlorohydrin-ethylenediamine as raw materials

Method used

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  • Polyaluminum ferric chloride-polyepichlorohydrin-ethylene diamine preparation method

Examples

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Effect test

Embodiment 1

[0022] (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 20 min (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. Continue to stir for 60 minutes after the dropwise addition; then lower the temperature below 15°C, add 33% trimethylamine aqueous solution cross-linking agent according to the molar ratio of trimethylamine and epichlorohydrin as 1:1.5; raise the temp...

Embodiment 2

[0027] (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 (the flow rate is 0.5m 3 / h), and then weigh 6.02 g of ethylenediamine into the round bottom flask, open the cooling water of the reflux condenser, and stir at G value of 250 S -1While 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. Continue stirring for 60 minutes after the dropwise addition; then lower the temperature below 15°C, add 33% trimethylamine aqueous solution cross-linking agent according to the molar ratio of trimethylamine and epichlorohydrin as 1:1.5; raise the temperature again to 90°C, react at constant temperature for 5 hou...

Embodiment 3

[0032] (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 17 min (the flow rate is 0.5m 3 / h), then weigh 6.02 g of ethylenediamine into the round bottom flask, open the cooling water of the reflux condenser, and stir the G value to 200 S -1 Heat up to 23 °C while stirring, and slowly add 18.56 g of epichlorohydrin (the molar ratio of epichlorohydrin to ethylenediamine is 2:1) dropwise with a separatory funnel for addition reaction, and the dropping time is 3 hours for aqueous solution After the dropwise addition, continue to stir for 60 minutes; then lower the temperature to 15°C, and add 33% trimethylamine aqueous solution cross-linking agent according to the molar ratio of trimethylamine and epichlorohydrin as 1:1.5; raise the temperature again to 85°C, react at constant temperature for 5 hours, and nat...

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Abstract

The invention relates to a polyaluminum ferric chloride-polyepichlorohydrin-ethylene diamine preparation method comprising the steps that: (1) a polyepichlorohydrin-ethylene diamine solution is prepared; (2) a polyaluminum ferric chloride solution is prepared; and (3) the prepared polyepichlorohydrin-ethylene diamine solution and the polyaluminum ferric chloride solution with a weight ratio of 1:20-1:50 are subjected to ultrasonic oscillation in an ultrasonic wave generator, such that polyaluminum ferric chloride-polyepichlorohydrin-ethylene diamine flocculant is prepared. According to the invention, epichlorohydrin, ethylene diamine, aluminum chloride and iron chloride are adopted as raw materials, and the polyaluminum ferric chloride-polyepichlorohydrin-ethylene diamine is prepared. The flocculant is a novel inorganic-organic high-molecular flocculant. As a high-efficiency water-processing agent, the flocculant can be widely applied in dye wastewater processing, and has advantages such as high molecular weight, good stability, good decolorizing effect, and the like.

Description

technical field [0001] The invention relates to a preparation method of polyaluminum ferric chloride-polyepichlorohydrin-ethylenediamine composite flocculant, belonging to the field of flocculant preparation. Background technique [0002] The textile printing and dyeing industry is one of the largest water polluters and consumers in the world. Millions of tons of untreated or substandard printing and dyeing wastewater are discharged into rivers and lakes every day in my country, and the resulting damage to the ecological environment and economic losses are immeasurable. Therefore, the purification and treatment of printing and dyeing wastewater has become a key issue restricting the survival and sustainable development of the current printing and dyeing industry. [0003] Printing and dyeing wastewater has the characteristics of complex composition, high concentration, deep color, etc., and contains a variety of water-soluble organic substances that are biologically toxic o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 孙翠珍张晓蕊张志斌张彦浩武道吉董芳孙玉林邹彦江
Owner SHANDONG JIANZHU UNIV
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