Treatment method for condensed wastewater in disperse blue 56 production process

A production process and treatment method technology, applied in the field of condensation wastewater treatment in the production process of Disperse Blue 56, to achieve the effect of simple operation, concise process, safe and efficient method

Inactive Publication Date: 2015-04-29
ZHEJIANG QICAI ECO TECH CO LTD
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  • Summary
  • 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

Method used

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  • Treatment method for condensed wastewater in disperse blue 56 production process

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Comparison scheme
Effect test

Embodiment 1

[0036] 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).

[0037] (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.

[0038] (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

[0048] 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

[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 hour to obtain solution I.

[0052] (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.

[0053] (3) Denitrification: add sulfamic acid to the filtrate I, and sti...

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Abstract

The invention discloses a treatment method for condensed wastewater in the disperse blue 56 production process. The treatment method comprises the following steps: heating the wastewater to be 25-100 DEG C, performing heat preservation reaction for 0.5-8 ours, adjusting the wastewater to be acidic, performing acid precipitation till no precipitate is generated and filtering to obtain a filtrate I; adding a primary amino compound into the filtrate I, reacting till no gas is generated, adjusting the mixture to be alkalic, introducing ozone to oxidize for 0.5-4 hours, then adding hydrogen peroxide, performing stirring reaction for 0.2-1 hour and filtering to obtain a filtrate II; concentrating and separating the filtrate II to obtain organic salt. The treatment method for the condensed wastewater in the disperse blue 56 production process is a treatment process taking pre-treatment, acid precipitation and oxidation-concentration as a main line, specially aims at the wastewater generated in the condensation process of a disperse blue 56 production process and can decompose organic matters remaining in the wastewater and remove the COD (Chemical Oxygen Demand) and the chromaticity in the wastewater step by step in a targeted way.

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): C02F9/10
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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