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Manufacturing method for cationic flocculant

A cationic flocculant and its manufacturing method technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of inconvenient transportation and use, flammability and strong toxicity of epichlorohydrin, so as to save energy and overcome flammability , the effect of reducing wastewater discharge

Inactive Publication Date: 2019-10-29
青岛长兴高新科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the main raw material epichlorohydrin is flammable, explosive, and highly toxic, which brings inconvenience to the transportation and use process;

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of manufacture method of cationic flocculant, comprises the following steps: in the glass reactor of 500ml, add dimethylamine (40%) 110g (0.976mol), dichloropropanol (99%) 127.30g (0.977mol), NaOH (50%) aqueous solution 78.0g (0.975mol);

[0027] Control the reaction temperature at 23°C, slowly add 127.30g of dichloropropanol (99%) and 78.0g (0.975mol) of NaOH (50%) aqueous solution slowly from the top of the reactor, and the feeding time is 50 minutes. After the feeding is finished, keep the temperature After 30 minutes, the temperature was raised to 30°C and 30.05 g of ethylenediamine (10%) aqueous solution was added. After the dropwise addition, the temperature was raised to 55°C and reacted for 5 hours to obtain a cationic flocculant.

Embodiment 2

[0029] A kind of manufacture method of cationic flocculant, comprises the following steps: in the glass reactor of 500ml, add dimethylamine (40%) 110g (0.976mol), dichloropropanol (99%) 127.30g (0.977mol), NaOH (50%) aqueous solution 93.6g (1.17mol);

[0030] Control reaction temperature 24 ℃, slowly drop dichloropropanol (99%) 127.30g, and NaOH (50%) aqueous solution 93.6g (1.17mol) respectively from the reactor top, feed time 50 minutes, after feed finishes, keep temperature After 30 minutes, the temperature was raised to 30°C and 30.05 g of ethylenediamine (10%) aqueous solution was added. After the dropwise addition, the temperature was raised to 55°C and reacted for 5 hours to obtain a cationic flocculant.

Embodiment 3

[0032] A kind of manufacture method of cationic flocculant, comprises the following steps: in the glass reactor of 500ml, add dimethylamine (40%) 131.86g (1.17mol), dichloropropanol (99%) 127.30g (0.977mol) , NaOH (50%) aqueous solution 93.6g (1.17mol);

[0033] Control the reaction temperature at 25°C, slowly add 127.30g of dichloropropanol (99%) and 93.6g (1.17mol) of NaOH (50%) aqueous solution slowly from the top of the reactor, and the feeding time is 50 minutes. After the feeding is finished, keep the temperature After 30 minutes, raise the temperature to 30°C and add 48.08g of ethylenediamine (10%) aqueous solution. After the dropwise addition, raise the temperature to 55°C and react for 5h to obtain the cationic flocculant.

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Abstract

The invention discloses a manufacturing method for a cationic flocculant. The manufacturing method comprises the following steps: adding dimethylamine, dichloropropanol and an NaOH aqueous solution into a glass reactor with a volume of 500 ml; controlling a reaction temperature at 23 to 27 DEG C, respectively and slowly dropwise adding the dichloropropanol and the NaOH aqueous solution from the top part of the reactor for 50 minutes, after the dichloropropanol and the NaOH aqueous solution are added, maintaining the temperature for 30 minutes; and carrying out heating to 30 DEG C, adding an ethylenediamine aqueous solution, after the ethylenediamine aqueous solution is dropwise added, raising a temperature to 55 DEG C, and carrying out a reaction for 5 h so as to obtain the cationic flocculant. The manufacturing method provided by the invention uses an epichlorohydrin preparation intermediate namely the dichloropropanol as a raw material for synthesis of a cationic polymer flocculant,overcomes the disadvantages of flammability, explosiveness and strong toxicity of epichlorohydrin, simplifies the technical process of epichlorohydrin preparation by a glycerol method, saves energy and reduces the discharging of wastewater.

Description

technical field [0001] The invention relates to the technical field of cationic flocculants, in particular to a method for manufacturing cationic flocculants. Background technique [0002] Due to the development of industry, a large amount of industrial water is required, and a large amount of waste water is generated at the same time. These two types of water need to undergo a series of treatments before they can be used or discharged. Flocculation technology is the most important technology in the water treatment process. By adding flocculants, the colloids or suspended particles in the water can be flocculated into larger suspensions. It is separated from water to achieve the purpose of water purification. The flocculant water treatment technology is the most widely used and lowest cost technology in the water treatment process. Its core technology is to prepare high-performance flocculant products; [0003] The mechanism of action of the flocculant is: use the groups wi...

Claims

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Application Information

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IPC IPC(8): C02F1/54
CPCC02F1/54
Inventor 张德文
Owner 青岛长兴高新科技发展有限公司
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