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Method for removing aniline substances from organic pigment wastewater

A technology for organic pigments and waste water, which is applied in the fields of water pollutants, chemical instruments and methods, and multi-stage water/sewage treatment, etc., can solve the problems of increasing operating costs and cumbersome treatment processes, and achieves low treatment costs, simple processes, and aniline. The effect of high removal rate

Inactive Publication Date: 2016-12-14
BEIJING HUIYU LEBANG ENVIRONMENT PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The treatment process of this method is cumbersome, and the cost of heating steam and the disposal of flocculated sludge will increase the operating cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In this example, a method for removing aniline substances from organic pigment wastewater is provided. The treatment object is taken from the production wastewater of organic pigment red A in a factory in Zhejiang. The raw water quality is: pH=9, COD is 4290mg / L, The aniline is 146 mg / L, and the chroma is 650 times, and the aniline compounds are mainly 2B acid as raw materials for production.

[0025] The method specifically includes the following steps.

[0026] Step S10. complex extraction: first, in the present embodiment, tributyl phosphate is used as extractant, aviation kerosene is used as diluent, and the volume ratio of said tributyl phosphate to said aviation kerosene is 16:84, After the two are evenly mixed, a complex extractant is obtained. Take 3L of the organic pigment red A production wastewater, adjust its pH value between 3 and 5, add 200mL of the above-mentioned complex extractant, mix and react for 30 minutes, then stand and separate to obtain the ext...

Embodiment 2

[0030] In this example, a method for removing anilines from organic pigment wastewater is provided. The treatment object is taken from the production wastewater of organic pigment red B in a factory in Zhejiang. The raw water quality is: pH=5, COD is 2935mg / L, The aniline is 246mg / L, and the chromaticity is 929mg / L. Among them, aniline compounds are mainly red-based KD as raw materials for production.

[0031] The method specifically includes the following steps.

[0032] Step S10. complex extraction: first, in the present embodiment, with dibutyl butyl phosphate as extractant, with diesel oil as diluent, the volume ratio of dibutyl butyl phosphate to the diesel oil is 40: 60. The complex extractant is obtained after the two are mixed evenly. Take 3L of the organic pigment red B production wastewater, adjust its pH value between 3 and 5, add 250mL of the above-mentioned complex extractant, mix and react for 60 minutes, then stand and separate to obtain the extract phase and ...

Embodiment 3

[0036] In this example, a method for removing anilines from organic pigment wastewater is provided. The treatment object is organic pigment yellow production wastewater from a factory in Zhejiang. The raw water quality is: pH=4.5, COD is 3449mg / L, The aniline is 366mg / L, and the chromaticity is 750 times. Among them, aniline compounds are mainly naphthol AS-LC as the raw material for production.

[0037] The method specifically includes the following steps.

[0038]Step S10. Complex extraction: first, in the present embodiment, tributyl phosphate is used as extractant, aviation kerosene is used as diluent, and the volume ratio of tributyl phosphate and aviation kerosene is 25:75, and the two are mixed After uniformity, a complex extractant is obtained. Take 3L of the organic pigment yellow production wastewater, adjust its pH value between 3 and 5, add 300mL of the above-mentioned complex extractant, mix and react for 30 minutes, then stand and separate to obtain the extract...

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Abstract

The invention provides a method for removing aniline substances from organic pigment wastewater. The method comprises the steps that firstly, complexing extraction is conducted on the organic pigment wastewater through a complexing extraction agent in an acidic environment, and after standing is conducted for layering, an extraction phase and an aqueous phase are obtained; secondly, an alkaline solution is added into the extraction phase for complexing extraction agent regeneration, standing is conducted for layering after a mixed reaction is conducted, and then a concentrated solution containing aniline compounds and a regenerated complexing extraction agent are obtained. The method is simple in technology, high in aniline removing rate, low in treatment cost and beneficial for energy conservation, environment protection and reclamation production.

Description

technical field [0001] The invention relates to the field of fine chemical wastewater treatment, in particular to a method for removing aniline substances from organic pigment wastewater. Background technique [0002] Aniline compounds are important chemical raw materials for dyestuffs, pharmaceuticals, printing and dyeing industries. Such substances are highly water-soluble and difficult to degrade. They are harmful substances that seriously pollute the environment and endanger human health. They are classified as "carcinogenic, teratogenic, and mutagenic" "Three-to-type compounds are required to be strictly controlled in industrial wastewater. [0003] During the synthesis of organic pigments, a large amount of aniline compounds (such as 2B acid, red base KD, naphthol AS-LC, etc.) will remain in the wastewater as unreacted raw materials. This type of wastewater has high aniline content and deep color , difficult to be biodegradable. [0004] At present, the commonly used...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F101/38
CPCC02F1/26C02F1/66C02F2101/38
Inventor 程迪欧云川杨宏伟杨峻
Owner BEIJING HUIYU LEBANG ENVIRONMENT PROTECTION TECH CO LTD
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