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Treatment method for production waste water generated in preparation of bromaminic acid sodium salt through bromination

A technology for producing wastewater and a treatment method, applied in the field of water treatment, can solve the problems of increasing the cost and difficulty of wastewater treatment, high wastewater chromaticity and COD, and achieve the effects of reducing wastewater discharge, reducing chromaticity and COD, and making up for losses

Active Publication Date: 2014-11-26
JIANGSU HUAER CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the waste water contains a small amount of bromine sodium salt in a dissolved state and unbrominated sulfonated compounds, the chroma and COD of the waste water are high, which increases the cost and difficulty of waste water treatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] In a 1000ml four-necked flask, add 800ml of bromination waste water, add 0.2g of sodium sulfite under stirring, adjust the pH to 3-4, then add 4g of diatomaceous earth, raise the temperature to 65-70°C, keep stirring for 30 minutes, vacuum pump Filter, filter and finish, and the filtrate is set aside.

[0020] Put the filtrate above through a small high-pressure pump into an ionic membrane filter for secondary membrane separation to separate and concentrate organic matter and inorganic matter. The amount of water containing organic matter accounts for about 30%. After bromination, 70% of the clear liquid is discharged and processed; The detection chromaticity is reduced from 10000 times to 120 times, and the COD is reduced from 5500 to 800.

Embodiment 2

[0022] According to the feeding and operation of Example 1, in a 1000ml four-neck flask, add 800ml of bromination waste water, add 0.2g of oxalic acid under stirring, adjust the pH to 3-4, then add 2g of activated carbon, heat up to 65-70°C, and keep warm Stir the reaction for 30 minutes, vacuum filter, filter, and the filtrate is set aside;

[0023] Put the filtrate above through a small high-pressure pump into an ionic membrane filter for secondary membrane filtration to separate and concentrate organic matter and inorganic matter. The amount of water containing organic matter accounts for about 30%. After bromination, 70% of the clear liquid is discharged and processed; The detection chromaticity is reduced from 10000 times to 110 times, and the COD is reduced from 6000 to 500.

Embodiment 3

[0025] According to the feeding and operation of Example 1, in a 1000ml four-neck flask, add 800ml of bromination wastewater, add 0.5g of iron powder under stirring, adjust the pH to 3-4, then add 4g of diatomaceous earth, and heat up to 85-90 ℃, keep stirring and react for 30 minutes, vacuum filter, filter, and the filtrate is set aside;

[0026] Put the filtrate above through a small high-pressure pump into an ionic membrane filter for secondary membrane filtration to separate and concentrate organic matter and inorganic matter. The amount of water containing organic matter accounts for about 30%. After bromination, 70% of the clear liquid is discharged and processed; The detection chromaticity is reduced from 12000 times to 120 times, and the COD is reduced from 5800 to 600.

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PUM

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Abstract

The invention discloses a treatment method for production waste water generated in preparation of bromaminic acid sodium salt through bromination. The treatment method comprises the following steps (1) pretreating the production waste water by adopting a reducing agent and an adsorbent; and (2) performing membrane treatment on the production waste water in the step (1) through an ion exchange membrane. According to the treatment method, the waste water is pretreated by adopting the reducing agent and the adsorbent, and then is filtered by utilizing the ion exchange membrane so as to separate bromaminic acid sodium salt in dissolved state from incompletely reacted sulphonate so as to be recovered and mechanically applied into production, so that the loss of bromaminic acid sodium salt during preparation can be compensated, and the emission amount of the waste water can be decreased. In addition, according to the treatment method, the color and COD of a part of effluent can also be reduced, and further the treatment cost and difficulty of the waste water can be lowered.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a method for treating production wastewater produced by bromination to prepare bromine sodium salt. Background technique [0002] Bromine sodium salt, the chemical name is 1-amino-4-bromoanthraquinone-2-sodium sulfonate, and the CAS number is 116-81-4. Bromine sodium salt is an important dye intermediate, which is mainly used in the production of important dyes such as disperse, acid and reactive dyes. The bromination process for the preparation of bromine sodium salt is obtained by substituting 1-amino-anthraquinone-2-sulfonic acid with bromine. In the prior art, the waste water produced in the production process of bromic acid sodium salt is treated by discharging the waste water produced by bromination to the waste water treatment station, and then discharged after passing the treatment. Because the waste water contains a small amount of bromine sodium salt in a diss...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C07C303/44C07C309/48
Inventor 张龙李少文侯保元
Owner JIANGSU HUAER CHEM
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