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Printing and dyeing wastewater flocculating agent and preparation method thereof

A technology for printing and dyeing wastewater and flocculant, which is applied in separation methods, mining wastewater treatment, chemical instruments and methods, etc., can solve the problems of high one-time cost, serious membrane pollution, slow settling speed, etc. Good and stable effect

Inactive Publication Date: 2018-09-07
NANNING XIAYANG CHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Membrane separation technology is a physical treatment process with good selectivity, no phase change, and low operating costs. The disadvantages are high one-time cost and serious membrane pollution. Different pretreatment methods need to be selected according to different types of wastewater.
[0012] Although the printing and dyeing wastewater flocculants in the prior art are all developing toward reducing production costs, improving decolorization efficiency, and improving pollutant treatment efficiency, there are still certain problems, such as slow settling speed, high dosage, easy Secondary pollution and other issues

Method used

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  • Printing and dyeing wastewater flocculating agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Divide 50-60 parts of melamine into 3 parts, the first part of melamine is 20 parts by weight, the second part of melamine is 18 parts by weight, and the third part of melamine is 18 parts by weight;

[0036] Preparation of modified melamine: Add 6 parts of formaldehyde and 28 parts of ethylene glycol into a three-necked flask, adjust the pH to 8 with triethanolamine, raise the temperature to 64°C while stirring, then add 20 parts of melamine first, and raise the temperature to 80°C. React for 37 minutes, then add 18 parts of melamine, continue the reaction, react for 60 minutes, then add 18 parts of melamine, and react at constant temperature until the water number is 3.0, add 10% caprolactam, react for 8 minutes, cool down to 62 ° C, slowly add 5% H 2 o 2 , and continue to use triethanolamine to adjust the pH value to 8; when the H2O2 reaction is complete (that is, no bubbles are generated in the reaction solution), stop the reaction, lower the temperature to 40°C, ad...

Embodiment 2

[0039] Divide 50-60 parts of melamine into 3 parts, the first part of melamine is 19 parts by weight, the second part of melamine is 20 parts by weight, and the third part of melamine is 20 parts by weight;

[0040] Preparation of modified melamine: Add 5 parts of formaldehyde and 30 parts of ethylene glycol into a three-necked flask, adjust the pH to 8 with triethanolamine, raise the temperature to 63°C while stirring, then add 19 parts of melamine first, and raise the temperature to 75°C. React for 35 minutes, then add 20 parts of melamine, continue the reaction, react for 70 minutes, then add 20 parts of melamine, and react at constant temperature until the water number is 3.0, add 10% caprolactam, react for 10 minutes, cool down to 65 ° C, slowly add 5% H2O2, And continue to use triethanolamine to adjust the pH value to 8; when the H2O2 reaction is complete (that is, no bubbles are generated in the reaction solution), stop the reaction, lower the temperature to 40°C, add 50...

Embodiment 3

[0043] Divide 50-60 parts of melamine into 3 parts, the first part of melamine is 20 parts by weight, the second part of melamine is 18 parts by weight, and the third part of melamine is 20 parts by weight;

[0044] Preparation of modified melamine: Add 5.5 parts of formaldehyde and 20 parts of ethylene glycol into a three-necked flask, adjust the pH to 8 with triethanolamine, raise the temperature to 65°C while stirring, then add 20 parts of melamine first, and raise the temperature to 76°C. React for 40 minutes, then add 18 parts of melamine, continue the reaction, react for 65 minutes, then add 20 parts of melamine, and react at constant temperature until the water number is 3.0, add 10% caprolactam, react for 9 minutes, cool down to 63 ° C, slowly add 5% H2O2, And continue to use triethanolamine to adjust the pH value to 8; when the H2O2 reaction is complete (that is, no bubbles are generated in the reaction solution), stop the reaction, lower the temperature to 40 ° C, add...

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Abstract

The invention relates to the technical field of sewage treatment and in particular relates to a printing and dyeing wastewater flocculating agent and a preparation method thereof. The flocculating agent is prepared from the following components in parts by weight: 20 to 30 parts of butyl xanthate, 50 to 60 parts of melamine, 25 to 35 parts of ferrous sulfate, 20 to 25 parts of bentonite, 15 to 20parts of dimethyl diallyl ammonium chloride, 10 to 15 parts of starch aluminium octenylsuccinate, 12 to 18 parts of polyvinylpyrrolidone, 10 to 16 parts of itaconic acid copolymer, 10 to 20 parts of zeolite, 5 to 10 parts of calcium hydroxide, 8 to 10 parts of fungicide and 100 to 150 parts of de-ionized water. The preparation method comprises the following steps: firstly, modifying the melamine;then mixing the melamine with other raw materials to prepare the printing and dyeing wastewater flocculating agent. The flocculating agent provided by the invention can be used for effectively removing pollutants in a dyestuff and has the advantages of good flocculating effect, rapid sedimentation speed and small dosage.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a flocculant for printing and dyeing wastewater and a preparation method thereof. Background technique [0002] my country is one of the countries with the most scarce water resources per capita in the world today, and the per capita fresh water resources are only a quarter of the world average. With the development of society, people's demand for water in production and life continues to increase, and the contradiction between the development of our country's economy and the shortage of resources is more prominent. [0003] I have seen that the discharge of printing and dyeing textile wastewater is large every year. Printing and dyeing wastewater has the characteristics of large water volume, high content of organic pollutants, large chroma, and large changes in water quality and water volume. It is one of the difficulties and focuses of current industrial wastewater tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/00C02F1/56C02F1/54C02F1/52C02F1/40C02F1/28C02F103/30C02F103/10C02F101/20
CPCC02F1/00C02F1/281C02F1/50C02F1/5236C02F1/54C02F1/56C02F2101/20C02F2103/10C02F2103/30
Inventor 韦明
Owner NANNING XIAYANG CHEM TECH CO LTD
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