Treatment method of waste water generated in condensation reaction during disperse blue 56 production process

A technology of production process and treatment method is applied in the field of treatment of condensation wastewater in the production process of disperse blue 56, and achieves the effects of simple process, mild conditions, and safe and efficient method.

Active Publication Date: 2016-04-20
ZHEJIANG QICAI ECO TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no literature report on the treatment method of the wastewater

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  • Treatment method of waste water generated in condensation reaction during disperse blue 56 production process

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Embodiment 1

[0050] The condensation waste water produced in the production process of Disperse Blue 56 is preliminarily filtered, and the measured pH is 11, COD is about 89154mg / L, containing 1.5% of potassium hydroxide (based on the quality of waste water), and 11% of potassium nitrite (based on the quality of waste water). waste water quality as the benchmark).

[0051] (1) Pretreatment: Heat the wastewater to 50° C., keep stirring and react for 1.5 hours to obtain solution I. Colorless gas is produced during the reaction, and the waste water is still black and opaque after the reaction.

[0052] (2) Acid analysis: Add the waste acid produced by the primary nitrification in the production process of Disperse Blue 56 to the pretreated waste water (solution I), adjust the pH to 0.5, and filter after acid analysis with aeration at 70°C for 1 hour to obtain Filtrate I and waste residue. During the reaction, a reddish-brown gas is produced, which is absorbed by a mixed solution of sodium h...

Embodiment 2

[0062] Keeping the other conditions in Example 1 unchanged, removing the photocatalytic step, and directly concentrating, it was found that the solution gradually turned yellow during the concentration process, resulting in a slightly yellow isolated potassium sulfate salt with a purity of 92.8%, and COD of condensed water=33mg / L, nitrate nitrogen is 16mg / L.

Embodiment 3

[0064] The condensation waste water produced in the production process of Disperse Blue 56 is preliminarily filtered, and the measured pH is 11, COD is about 89154mg / L, containing 1.5% of potassium hydroxide (based on the quality of waste water), and 11% of potassium nitrite (based on the quality of waste water). waste water quality as the benchmark).

[0065] (1) Pretreatment: Heat the wastewater to 50° C., keep stirring and react for 1 hour to obtain solution I.

[0066] (2) Acid analysis: the pretreated waste water (solution I) was added with nitrification waste acid once to adjust the pH to 0.5, aerated at 70° C. for 1 hour and then filtered to obtain filtrate I and waste residue. During the reaction process, a reddish-brown gas is produced, which is sequentially absorbed with sodium hydroxide and sodium carbonate solutions; after the reaction is completed, filter, and the waste water COD=4801mg / L.

[0067] (3) Denitrification: add sulfamic acid to the filtrate I, and sti...

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Abstract

The invention discloses a treatment method of waste water generated in a condensation reaction during a disperse blue 56 production process. The method comprises the following steps: heating waste water to 25-100 DEG C, keeping the temperature for 0.5-8 hours, adjusting the pH value to acidity, carrying out acidification till no deposition generates, and filtering the waste water in order to obtain a filtrate I; adding a primary amine compound into the filtrate I, and carrying out a reaction till no gas generates; oxidizing the waste water by using a Fenton reagent oxidation process, an ozone and hydrogen peroxide oxidation process or a combination of the two processes, in order to obtain a filtrate II; condensing and separating the filtrate II, in order to obtain inorganic salt. The processing technology uses 'pretreatment-acidification-oxidation-condensation' as the mainline, and aims at waste water generated in the condensation process during the disperse blue 56 production process; residual organic matters in the waste water are gradually and targetedly decomposed, and COD and chroma of the waste water are removed.

Description

technical field [0001] The invention relates to the technical field of industrial wastewater, in particular to a method for treating condensation wastewater in the production process of Disperse Blue 56. Background technique [0002] Disperse blue 56, also known as disperse blue 2BLN, 1,5-dihydroxy-4,8-diaminoanthraquinone bromide, is an important disperse dye. It is mainly used for dyeing polyester and its blended fabrics, nylon, polyester fiber, etc., and can also be used for dyeing superfine fibers. It is one of the three primary colors. The production process of Disperse Blue 56 mainly includes mercury method and non-mercury method. Among them, the mercury method has been discontinued due to serious pollution. After several improvements, the currently widely used process is the non-mercury phenoxy method. The common process is primary nitration-phenoxylation-secondary nitration-hydrolysis-reduction-bromination. There are about 14 streams of waste water generated durin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F103/36
CPCC02F1/001C02F1/02C02F1/04C02F1/281C02F1/32C02F1/52C02F1/66C02F1/72C02F1/722C02F1/725C02F1/78C02F9/00C02F2103/36C02F2209/06C02F2301/08C02F2305/10
Inventor 张云保杨迪迪陈磊吕伏建毛兵张静
Owner ZHEJIANG QICAI ECO TECH CO LTD
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