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Method for treatng wastewater of producing reactive dyes in class of bromamine acid, and for reclaiming resources

A technology for reactive dyes and waste water production, applied in separation methods, adsorption water/sewage treatment, filter regeneration, etc., can solve problems such as effective treatment of waste water from the production of reactive dyes that have not been found in bromamide, resource recycling, environmental river pollution, etc.

Inactive Publication Date: 2005-01-12
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing domestic manufacturers have not properly treated their production wastewater, causing serious pollution to the environment and rivers
[0003] The result of literature search shows: before the present invention is accomplished, do not find the report that the bromic acid reactive dye production wastewater is carried out effective control and resource recycling

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: Put each 10mL of NDA-99, NDA-180 and NDA-181 resin into three jacketed glass adsorption columns (Φ12×160mm), and the wastewater from the production of Reactive Brilliant Blue X-BR is 25±5 ℃ flows through the three adsorption columns at flow rates of 20mL / h, 10mL / h and 10mL / h in sequence, and the processing capacity is 34mL / batch, 40mL / batch and 250mL / batch, respectively.

[0019] For NDA-99 with saturated adsorption, a composite desorbent composed of 10mL2moL / L NaOH aqueous solution, 10mL1moL / L NaOH aqueous solution and 20mL water is used to pass through the resin bed at a temperature of 60±5℃ at a flow rate of 10mL / h. The layer is desorbed. The desorbed high-concentration NaOH desorption solution (10 mL) is acidified and distilled to obtain organic matter. The main component is 2,4-diaminobenzenesulfonic acid, which can be recycled. Low-concentration alkali and water desorption liquid jacket is used for the next batch of desorption operations.

[0020] For NDA-1...

Embodiment 2

[0023] Example 2: Other basic conditions are the same as Example 1, except that the temperature of the wastewater flowing through the three adsorption columns (towers) is 5±5°C, and the desorption temperature is 10±5°C. The treatment effect is not as good as that of Example 1.

Embodiment 3

[0024] Example 3: Other basic conditions are the same as Example 1, except that the temperature of the wastewater flowing through the three adsorption columns (towers) is 50±5°C, and the desorption temperature is 60±5°C. The treatment effect is not as good as that of Example 1.

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PUM

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Abstract

The processing steps are: water water passes through three kinds of adsorption towers in proper order in temp. 5-50 deg.C and flow quantity 0.5-3 B v / h, each absorption tower is filled by a kind of resin, alkali solution, carbinol and water are used as deadsorption agent to deadsorb and regenerate the resin absorbed organic substances, the deadsorption temp. is 10-60 deg.C, the flow quantity of deadsorption agent is 0.5-3 Bv / h. High density euent generated by deadsorption can be distilled to recover dye and other organic substances, low density eluent can be used to next deadsorption operation. By this invention, waste water producing bromamine acid dye CODcr can be reduced less than 100 mg / L and chromaticness is less than 10 times after being processed by resin.

Description

1. Technical Field [0001] The invention relates to a method for the treatment and resource recovery of waste water generated in the production process of a type of dye, specifically, to a method for treatment and resource recovery of the waste water discharged in the production process of bromamine active dyes. 2. Background technology [0002] Bromamine acid reactive dyes are an important dark variety in the dye industry. There are many varieties of reactive brilliant blue K-NR, K-3R, K-BR, X-BR, X-3R, etc., with an annual production capacity of nearly 10,000 Ton. A large amount of process waste water is generated in the production of these dyes, and each ton of product produced approximately produces more than 15 tons of process waste water. The chroma and organic content of the wastewater are both high, reaching 30,000 to 40,000 times and 2,000 to 5,000 mg / L, respectively. The main pollutants in wastewater are finished dyestuffs and their raw materials and intermediates. Most ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/34C02F1/28
Inventor 李爱民陆朝阳刘伟费正皓蒋珍茂周家艳张炜铭龙超陈金龙张全兴
Owner NANJING UNIV
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