Treatment method for production wastewater of sulfonic acid group dye and dye intermediate of sulfonic acid group dye

A technology for dye intermediates and production wastewater, applied in the field of resource utilization, can solve the problems of no further treatment and recovery scheme, the problem of extraction agent stratification, engineering problems, etc., to achieve comprehensive utilization of wastewater treatment resources, and a wide range of applications , the effect of long service life

Active Publication Date: 2013-11-27
ZHEJIANG JIHUA GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technical solution has the following disadvantages: 1) The extraction efficiency is not high, the effect is poor, multi-stage countercurrent extraction and frequent oil phase regeneration are required, and the process is long; 2) There is no further resource recovery and utilization plan for the organic materials recovered by extraction, At the same time, there is no further utilization plan for the discharged water after extraction treatment
[0005] Chinese patent CN1073536C discloses a method for recovering organic matter in the waste mother liquor of naphthalene dye intermediates by using a trialkyl tertiary amine. Although this technical solution can solve the invention purpose of the patent, it still has the following disadvantages: 1) The sewage is treated by extraction There should be a large amount of inorganic salts in the extracted water layer obtained afterward, and the scheme is to discharge directly as waste water without further treatment and recovery scheme; 2) the extraction agent is trialkyl tertiary amine and diluent kerosene, because kerosene contains a small amount of non-toxic Saturated alkanes are likely to cause stratification of the extractant, affect the homogeneity of the extractant, and may also cause engineering problems
In addition, its extraction efficiency is not high, the extraction effect is poor, and the extraction ratio is relatively high.
[0006] In the current complex extraction treatment method for this type of wastewater, the water layer after the extraction treatment is discharged as waste water or put into production as bottom water for production. In fact, this part of the water layer should contain a large amount of inorganic salts. Discharge will also cause some pollution, and putting it into production recycling as production bottom water will lead to the accumulation of salt in it, which will eventually seriously affect normal production

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  • Treatment method for production wastewater of sulfonic acid group dye and dye intermediate of sulfonic acid group dye
  • Treatment method for production wastewater of sulfonic acid group dye and dye intermediate of sulfonic acid group dye
  • Treatment method for production wastewater of sulfonic acid group dye and dye intermediate of sulfonic acid group dye

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] extractant according to figure 1 The preparation process shown is to prepare the solubilizer and heat it up to 50°C under stirring, then add the catalytic promoter, keep it at 60°C for 1 hour and then add the complexing agent to obtain the extractant; the complexing agent is tridecylamine, The mass percentage is 15%, the solubilizer is toluene, the mass percentage is 85%, and the catalytic promoter mass percentage is 0%.

[0036] The production wastewater is taken from the wastewater collection pool of the company's reactive dye production workshop. At this stage, the dyes produced in the workshop mainly include reactive black KNB, reactive yellow W, reactive red 090329, reactive yellow 3RFN, and acid black 1#. The appearance of the produced wastewater is dark brown, pH=6.8, and the total amount of organic matter is 19700mg / L.

[0037] according to figure 2 In the method shown, slowly add dilute sulfuric acid with a mass concentration of 70% to the 5L of production w...

Embodiment 2

[0042] extractant according to figure 1 The preparation process shown is to prepare the solubilizing agent by raising the temperature to 60°C under stirring, then adding the catalyst promoter, and adding the complexing agent after maintaining at 50°C for 0.5 hours to obtain the extractant; the complexing agent is trioctylamine, The mass percentage is 45%, the solubilizer is xylene, the mass percentage is 50%, and the mass percentage of the catalytic assistant trialkylmethylamine chloride is 5%.

[0043] The production wastewater is taken from the H-acid mother liquor collection pool of the dye intermediate H-acid production workshop. The appearance of the obtained production wastewater is brown, pH=2.9, and the total organic matter is 39600mg / L.

[0044] according to figure 2 In the method shown, slowly add dilute sulfuric acid with a mass concentration of 30% to the 2L of waste water taken, and adjust the pH value to 1.5. Then mix it well with 1000ml of the prepared extrac...

Embodiment 3

[0049] extractant according to figure 1 The preparation process shown is to prepare the solubilizer and heat it up to 55°C under stirring, then add the catalytic promoter, keep it at 55°C for 45 minutes, and then add the complexing agent to obtain the extractant; the complexing agent is trioctylamine, The mass percentage is 20%, the solubilizer is dodecylbenzene, the mass percentage is 78%, and the mass percentage of the catalytic assistant trialkylmethylamine chloride is 2%.

[0050] The wastewater is taken from the wastewater collection pool of the company's reactive dye production workshop. At this stage, the workshop mainly produces reactive black KNB, acid black 1# and reactive yellow 3RFN and other varieties. The appearance of the collected wastewater is blue-brown, pH=2.9, and the total amount of organic matter is 22600mg / L.

[0051] according to figure 2 In the method shown, slowly add dilute sulfuric acid with a mass concentration of 50% to the 2L of waste water ta...

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Abstract

The invention belongs to the technical field of treatment of dye chemical engineering production wastewater and provides a treatment method for production wastewater of sulfonic acid group dye and dye intermediate of the sulfonic acid group dye to solve the problem of treatment of production wastewater of the sulfonic acid group dye and the dye intermediate of the sulfonic acid group dye. The treatment method comprises the steps as follows: (1), extracting the production wastewater; (2), performing absorption treatment on an aqueous layer after extraction; (3), recovering and reusing inorganic salt; (4), regenerating an extractant, recovering and reusing organisms, recovering the inorganic salt sodium sulfate contained in the production wastewater, and taking the sodium sulfate as a commercialized thinner and a dyeing accelerant used in the process of dyeing to enable the sodium sulfate to be applied to practical production of active dyes so as to realize wastewater treatment and recovery comprehensive utilization.

Description

technical field [0001] The invention belongs to the technical field of dye chemical production wastewater treatment, and specifically relates to a method for comprehensive treatment and resource utilization of wastewater in the production process of sulfonic acid dyes and commonly used sulfonic acid intermediates. Background technique [0002] As an important fine chemical product, dyes are widely used in daily life and industry. Among them, reactive and acidic dyes containing sulfonic acid groups are the fastest growing dyes in recent years. Dye intermediates containing sulfonic acid groups are indispensable raw materials for the production of reactive and acidic dyes containing sulfonic acid groups, and the output is quite large. Due to the complex structure of such dyes and their intermediates, long production process, and many side reactions, a large amount of wastewater with complex components, high concentration, and a large amount of salt is produced during the produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/26C02F103/36
Inventor 孙岩峰刘伟简卫陈美芬
Owner ZHEJIANG JIHUA GROUP
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