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A kind of decolorizing agent and its preparation method and application

A technology of decolorizing agent and azodicarbonamide, which is applied in the fields of chemical instruments and methods, water/sludge/sewage treatment, water/sewage treatment, etc. It can solve the problem that BOD5 content is greatly affected, difficult to control, and low COD removal rate And other issues

Active Publication Date: 2021-05-25
CHENGDU KEHENG ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because of the influence of physical factors, chemical factors and biological factors, its properties fluctuate greatly. If it enters the water environment directly without treatment, it will cause serious environmental pollution. It has always been an urgent need in the design, operation and management of landfills. solved problem
[0003] Commonly used treatment methods include physical and chemical methods, such as activated carbon adsorption, chemical precipitation, ion exchange, membrane dialysis, chemical reduction, etc., but the cost is high, and the removal rate of COD is low for the garbage permeate with a long time; another A commonly used method is biological method, such as aerobic biological treatment, anaerobic biological treatment and the combined use of the two. This method is greatly affected by the BOD5 content in water, and the operating cost is high, and it is not easy to control. The above treatment is not recommended method

Method used

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  • A kind of decolorizing agent and its preparation method and application
  • A kind of decolorizing agent and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Dissolve 0.4 parts of ammonium chloride in water for later use; set the temperature of the water bath at 55°C, and add accurately weighed 20 parts of azodicarbonamide, 40 parts of diethylenetriamine, and 20 parts of epoxy Chloropropane, 20 parts of formaldehyde and water, start stirring and observe the temperature rise, when the temperature rises to 55°C, add 1 / 3 of the dissolved ammonium chloride, stir for 20-30min and then add 2 / 3 of the ammonium chloride And continue to stir, the reaction time is 2h. After the reaction, transfer the reaction result in the three-necked round-bottomed flask to a prepared transparent container, and cool to room temperature to obtain No. 1 decolorizing agent. The final water content in No. 1 decolorizing agent is 200 parts.

Embodiment 2

[0023] Dissolve 0.54 parts of ammonium chloride in water for later use; set the temperature of the water bath at 50°C, and add accurately weighed 25 parts of azodicarbonamide, 50 parts of diethylenetriamine, and 25 parts of epoxy Chloropropane, 25 parts of formaldehyde and water, start stirring and observe the temperature rise, when the temperature rises to 50°C, add 1 / 3 of the dissolved ammonium chloride, stir for 20-30min and then add 2 / 3 of the ammonium chloride And continue to stir, the reaction time is 2h. After the reaction, transfer the reaction result in the three-necked round-bottomed flask to a transparent container prepared in advance, and cool to room temperature to obtain the No. 2 decolorizing agent. The final water content in the No. 2 decolorizing agent is 300 parts.

Embodiment 3

[0025] Dissolve 0.6 parts of ammonium chloride in water for later use; set the temperature of the water bath at 60°C, and add accurately weighed 30 parts of azodicarbonamide, 45 parts of diethylenetriamine, and 30 parts of epoxy Chloropropane, 30 parts of formaldehyde and water, start stirring and observe the temperature rise, when the temperature rises to 60°C, add 1 / 3 of the dissolved ammonium chloride, stir for 20-30min and then add 2 / 3 of the ammonium chloride And continue to stir, the reaction time is 2h. After the reaction, transfer the reaction result in the three-necked round-bottomed flask to a transparent container prepared in advance, and cool to room temperature to obtain No. 3 decolorizing agent. The final water content in No. 3 decolorizing agent is 300 parts.

[0026] contrast agent

[0027] Dissolve 2 parts of ammonium chloride in water for later use; set the temperature of the water bath at 60°C, and add accurately weighed 50 parts of azodicarbonamide, 10 par...

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Abstract

The "a decolorizing agent and its preparation method and use" of the present invention belongs to the technical field of sewage treatment, and is characterized in that: in parts by weight, it includes 10-40 parts of azodicarbonamide, 30-70 parts of diethylenetri Amine, 10-40 parts of epichlorohydrin, 10-40 parts of formaldehyde, 0.1-1 part of ammonium chloride, 100-500 parts of water. It can be used to treat landfill permeate, domestic wastewater, industrial wastewater and oilfield wastewater.

Description

technical field [0001] The invention relates to sewage treatment technology, in particular to a decolorizing agent for garbage permeate treatment. Background technique [0002] Garbage permeate refers to a high-concentration organic wastewater formed from the moisture contained in the garbage itself in the landfill, the rain and snow water entering the landfill, and other moisture. It is generally a black liquid with a chroma of several hundred to several thousand times, a pH of 4-9, a COD content of 2000-62000mg / L, a BOD5 content of 60-45000mg / L, and heavy metal content exceeding the standard. Because of the influence of physical factors, chemical factors and biological factors, its properties fluctuate greatly. If it enters the water environment without treatment, it will cause serious environmental pollution. It has always been an urgent need in the design, operation and management of landfills. solved problem. [0003] Commonly used treatment methods include physical a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/00C02F103/06
CPCC02F1/00C02F2103/06
Inventor 张克江马江平王颖
Owner CHENGDU KEHENG ENVIRONMENTAL PROTECTION TECH