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Extraction agent and method for processing wastewater in hydroxyquinoline production through extraction agent

A treatment method and extraction agent technology are applied in the field of extraction agent and the use of the extraction agent to treat wastewater in the production of hydroxyquinoline, which can solve the problems of great harm to the environment and human beings, environmental pollution, low corrosiveness and the like, and achieve suitable The effect of popularization and use in a large range, simple operation and mild operating conditions

Inactive Publication Date: 2016-12-07
绵阳市龙鼎环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] 8-Hydroxyquinoline is white or light yellow crystal or crystalline powder, insoluble in water and ether, soluble in ethanol, acetone, chloroform, benzene or dilute acid, capable of sublimation, less corrosive, low toxicity, widely used in metal Determination and separation of dyes and drugs, as well as intermediates for the preparation of dyes and drugs, and can also be used as fungicides. It has a wide range of uses. In view of its wide range of applications, its production capacity is also relatively large. Nowadays, the main synthesis method is by O-aminophenol, o-nitrophenol, glycerin and concentrated sulfuric acid are obtained by Skaup reaction. Due to the relatively large production volume, a large amount of waste water and waste liquid will be generated in the synthesis process. The pH of the waste water and waste liquid generated is generally between 6-8. , COD is about 10,000 mg / L, and the content of organic matter is relatively high. It is a typical industrial wastewater containing refractory organic compounds. If it is not treated well in the future, it will cause great harm to the environment and human beings. polluted environment

Method used

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  • Extraction agent and method for processing wastewater in hydroxyquinoline production through extraction agent
  • Extraction agent and method for processing wastewater in hydroxyquinoline production through extraction agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Process steps for treating the waste water produced in the production of hydroxyquinoline:

[0038] 1) Preparation of extraction agent: trioctylamine 10kg, n-octanol 50kg, sulfonated kerosene 20kg;

[0039] 2) Adjust the pH, use industrial sulfuric acid to adjust the wastewater between 0.85-0.95, add the extractant to stir and separate the layers to obtain the extraction layer and the water layer, adjust the pH of the water layer to between 6-9, and detect the COD of the water layer, After testing, the COD is below 80mg / L, and it will be discharged after passing the test;

[0040] 3) stripping, mixing and stirring the extraction layer with sodium carbonate solution for stripping, reclaiming the extractant in the stripping layer after layering for reuse.

Embodiment 2

[0042] Process steps for treating the waste water produced in the production of hydroxyquinoline:

[0043] 1) Preparation of extraction agent: trioctylamine 20kg, n-octanol 30kg, sulfonated kerosene 50kg;

[0044] 2) Adjust the pH, use industrial sulfuric acid to adjust the waste water between 0.85-0.95, add the extractant to stir and layer to obtain the extraction layer and the water layer, the mass ratio of the waste water to the extractant is 5:1, the stirring rate is 100rad / min, stir The temperature was controlled at 30°C, and then the pH of the water layer was adjusted to 6-9. According to the proportion of 1wt%, activated carbon was added for decolorization, stirred for 20 minutes, and then suction filtered to obtain a transparent and colorless liquid, and COD was detected. After testing the COD is below 80mg / L, it will be discharged after passing the test, and the used activated carbon will be added to the coal-fired boiler for incineration;

[0045] 3) Back extraction...

Embodiment 3

[0047] Process steps for treating the waste water produced in the production of hydroxyquinoline:

[0048] 1) Preparation of extraction agent: trioctylamine 12kg, n-octanol 32kg, sulfonated kerosene 40kg;

[0049] 2) Adjust the pH, use industrial sulfuric acid to adjust the waste water between 0.85-0.95, add the extractant to stir and layer to obtain the extract layer and the water layer, the mass ratio of waste water to extractant is 5:2, the stirring rate is 50rad / min, stir The temperature is controlled at 20°C, and then the pH of the water layer is adjusted to between 6-9. According to the proportion of 2wt%, activated carbon is added for decolorization, the temperature is around 20°C and stirred for 30 minutes, and then filtered by suction to obtain a transparent and colorless liquid. And detect COD. After testing, the COD is below 80mg / L, and it is discharged after passing the test. The activated carbon after use is added to the coal-fired boiler for incineration;

[005...

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Abstract

The invention provides an extraction agent. The extraction agent is mainly prepared from, by mass, 10-20 parts of trioctylamine, 30-50 parts of n-caprylic alcohol and 20-50 parts of sulfonated kerosene. A method for processing wastewater in hydroxyquinoline production through the extraction agent mainly includes the following steps of A, adjusting the pH of wastewater in hydroxyquinoline production to be 0.85-0.95, and adding the extraction agent to be stirred to obtain a water layer and an extraction layer; B, adjusting the pH of the water layer to be 6-9, detecting the COD of the water layer, and controlling the COD of the water layer to be 80 mg / L or below. The extraction agent is simple in formula and has a good removal effect on harmful substances, especially organic matter in wastewater produced in hydroxyquinoline production; the extraction agent has high targeted performance and is specially used for processing wastewater produced in hydroxyquinoline production; by means of the extraction agent, operation steps can be greatly simplified, and the processing effect is good.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to an extractant and a method for treating wastewater in hydroxyquinoline production using the extractant. Background technique [0002] 8-Hydroxyquinoline is white or light yellow crystal or crystalline powder, insoluble in water and ether, soluble in ethanol, acetone, chloroform, benzene or dilute acid, capable of sublimation, less corrosive, low toxicity, widely used in metal Determination and separation of dyes and drugs, as well as intermediates for the preparation of dyes and drugs, and can also be used as fungicides. It has a wide range of uses. In view of its wide range of applications, its production capacity is also relatively large. Nowadays, the main synthesis method is by O-aminophenol, o-nitrophenol, glycerin and concentrated sulfuric acid are obtained by Skaup reaction. Due to the relatively large production volume, a large amount of waste water and waste liquid wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/26C02F103/36
CPCC02F1/26C02F2103/36
Inventor 彭勇张玉章
Owner 绵阳市龙鼎环保科技有限公司
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