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Disperse blue 56 primary nitrification and refining mother liquor wastewater treatment method

A treatment method, disperse blue technology, applied in natural water body treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc., can solve the problems of no public treatment methods, etc., to increase added value, simple process flow, economical treatment cost effect

Active Publication Date: 2016-08-17
ZHEJIANG QICAI ECO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method is to add water, sodium hydroxide and sodium sulfite to the product after primary nitration for neutralization and refining. During the refining process, a stream of waste water is produced, which contains sodium nitroanthraquinone sulfonate, sodium nitrite and Sodium sulfate, etc., do not disclose the treatment method of separately treating this waste water in the existing document patents

Method used

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  • Disperse blue 56 primary nitrification and refining mother liquor wastewater treatment method

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Experimental program
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Effect test

Embodiment 1

[0038] After preliminary filtration of Disperse Blue 56 primary nitrification refining mother liquor wastewater, the measured pH is 11.42, COD is about 275000mg / L, based on the quality of wastewater, it contains 1.2% sodium nitrite, 0.1% sodium sulfite, and 0.02% sodium sulfate.

[0039] (1) Complex extraction: Mix 300 mL of extractant {extractant is trioctylamine: sulfonated kerosene = 1:2 (volume ratio)} with 100 mL of waste water and stir evenly, and pass nitrogen oxide NO x Adjust the pH of the gas to 3, aerate for 1 hour and then stand for 0.5 hours to separate the oil phase I and the water phase I.

[0040] After the reaction, the color of the oil phase I was deep red and black, and the water phase I was a red transparent clear liquid. The COD of the water phase I = 1600 mg / L, based on the mass of the water phase I, the content of sodium nitrite is 7%, the content of sodium nitrate is 0.1%, and the content of sodium sulfate is 0.03%.

[0041] (2) Back extraction: add 10% sodium...

Embodiment 2

[0060] After preliminary filtration of Disperse Blue 56 primary nitrification refining mother liquor wastewater, the measured pH is 11.3, COD is about 279050mg / L, based on the quality of the wastewater, it contains 1.2% sodium nitrite, 0.1% sodium sulfite, and 0.02% sodium sulfate.

[0061] (1) Complex extraction: Mix 300mL of extractant {extractant is trioctylamine: sulfonated kerosene = 1:2 (volume ratio)} with 100mL of waste water and stir evenly, then pass SO 2 The gas was adjusted to pH 2.5, reacted at room temperature for 1 hour and then allowed to stand for 0.5 hour to obtain oil phase I and water phase I by layering.

[0062] After the reaction, the color of the oil phase I was deep red and black, and the water phase I was a reddish transparent clear liquid. The COD of the water phase I=603mg / L, based on the mass of the water phase I, the sodium nitrite content is 7%, the sodium nitrate content is 0.1%, and the sodium sulfate content is 0.02%.

[0063] (2) Back extraction: Ad...

Embodiment 3

[0082] After preliminary filtration of Disperse Blue 56 primary nitrification and refining mother liquor wastewater, the measured pH is 11.3 and COD is about 279050mg / L. Based on the quality of the wastewater, it contains 0.8% sodium nitrite, 0.1% sodium sulfite, and 0.8% sodium sulfate.

[0083] (1) Complexation extraction: Mix 300 mL of extractant {extractant is trioctylamine: sulfonated kerosene = 1:2 (volume ratio)} with 100 mL of wastewater, and use Disperse Blue 56 for secondary nitrification wastewater (containing about 25 sulfuric acid). %) Adjust its pH to 2.5, stir and react at room temperature for 0.5 hours and then stand for 0.5 hours to obtain oil phase I and water phase I by layering.

[0084] After the reaction, the color of the oil phase I was deep red and black, and the water phase I was a reddish transparent clear liquid. The COD of the water phase I = 321 mg / L, based on the mass of the water phase I, the sodium nitrite content is 0.2%, the sodium nitrate content ...

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Abstract

The invention discloses a processing method for mother liquor wastewater generated in one-time nitrifying and refining of disperse blue 56. The method comprises the following steps: (1) complexing and extracting: adjusting the mixed system of the wastewater and an extracting agent to acidity, complexing and extracting, and separating to obtain a water phase I and an oil phase I; (2) adsorbing: carrying out two-stage adsorbing and filtering on the water phase I to obtain a filtrate:(a) carrying out first-stage adsorbing by an adsorbent; (b) carrying out second-stage adsorbing by resin; (3) electro-dialyzing: electro-dialyzing the filtrate to obtain concentrated water and fresh water. A treatment process of extracting, adsorbing and concentrating is adopted, the residual organic matters in the wastewater can be gradually and specifically separated, the COD and the chroma in the wastewater can be removed, and a clean sodium salt solution can be obtained after concentrating the wastewater.

Description

Technical field [0001] The invention relates to the technical field of industrial wastewater, in particular to a method for treating Disperse Blue 56 primary nitrification and refining mother liquor wastewater. Background technique [0002] Disperse Blue 56 is also known as Disperse Blue 2BLN or a mixture of 1,5-dihydroxy-4,8-diaminoanthraquinone bromide and 1,8-dihydroxy-4,8-diaminoanthraquinone bromide. Important disperse dyes. It is mainly used for the dyeing of polyester and its blended fabrics, nylon, polyester fibers, etc. It can also be used for the dyeing of superfine fibers. It is one of the three primary colors. [0003] The production process of Disperse Blue 56 mainly includes mercury method and non-mercury method. Among them, mercury method has been discontinued due to serious pollution. After many improvements, the most widely used process is the non-mercury phenoxy method. The usual process is nitration-phenoxylation-secondary nitration-hydrolysis-reduction-bromin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/06C02F103/36
Inventor 郑鑫张云保陈磊张静毛兵杨迪迪
Owner ZHEJIANG QICAI ECO TECH CO LTD
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