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

A technology for reactive dyes and production wastewater, applied in separation methods, adsorption water/sewage treatment, filter regeneration, etc., can solve problems such as effective treatment of bromamic acid reactive dye production wastewater, resource recycling, environmental river pollution, etc.

Inactive Publication Date: 2006-10-18
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: Each 10mL of NDA-99, NDA-180 and NDA-181 resins were loaded into three jacketed glass adsorption columns (Ф12×160mm), and the production wastewater of Active Brilliant Blue X-BR was at 25±5 °C flows through three adsorption columns at a flow rate of 20mL / h, 10mL / h and 10mL / h in sequence, and the processing volumes are 34mL / batch, 40mL / batch and 250mL / batch respectively.

[0019] For saturated NDA-99, use 10mL 2moL / L NaOH aqueous solution, 10mL 1moL / L NaOH aqueous solution and 20mL water as a composite desorbent, at a temperature of 60±5°C, flow through the resin bed at a flow rate of 10mL / h layer is desorbed. The desorbed high-concentration NaOH desorption solution (10 mL) is adjusted to acid and the organic matter obtained after distillation is mainly composed of 2,4-diaminobenzenesulfonic acid, which can be recycled. The low-concentration alkali and water desorption solution sets are used for the next batch of desorption operations.

[0020] For adsorbed ...

Embodiment 2

[0023] Embodiment 2: other basic conditions are the same as embodiment 1, except that the temperature of waste water flowing through three adsorption columns (towers) is 5 ± 5 ℃, and the desorption temperature is 10 ± 5 ℃, and the treatment effect is not as good as that of embodiment 1.

Embodiment 3

[0024] Embodiment 3: other basic conditions are the same as embodiment 1, except that the temperature of waste water flowing through three adsorption columns (towers) is 50 ± 5 ℃, and the desorption temperature is 60 ± 5 ℃, and the treatment effect is not as good as that of embodiment 1.

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PUM

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Abstract

The invention discloses a treatment and resource recovery method for waste water from the production of bromoacidic reactive dyes. The process is as follows: the waste water passes through three kinds of adsorption towers sequentially under the conditions of 5-50°C and a flow rate of 0.5-3BV / h. Each of the adsorption towers is filled with a resin; alkaline solution, methanol and water are used as desorbents to desorb and regenerate the resin that has absorbed organic matter. The desorption temperature is 10-60°C, and the flow rate of the desorbent is 0.5-3BV / h; The high-concentration eluent from the desorption can recover dyes and other organic substances through distillation, and the solvent can be recovered, and the low-concentration eluent can be used for the next batch of desorption operations. Using this method, the waste water from the production of bromic acid reactive dyes can be treated with resin to COD cr Reduced to below 100mg / L, the chromaticity is less than 10 times, and the discharge can reach the standard, and most of the resources in the wastewater can be recycled, which has significant environmental, economic and social benefits.

Description

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

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/28B01J20/34
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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