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Method for treating waste acid generated in production process of bromamine acid

A technology of production process and treatment method, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of poor decolorization effect, difficult and ineffective waste acid treatment Remove waste acid organic matter and other problems, to achieve the effect of simple equipment

Active Publication Date: 2015-05-06
JIANGSU YUANZHENG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to treat the above-mentioned waste acid, and a large amount of activated carbon needs to be used in the decolorization process, and even if a large amount of activated carbon is used, the decolorization effect is very poor
[0006] Because the waste acid produced in the production process of bromic acid contains a large amount of sulfonated and polysulfonated aminoanthraquinone, the general waste acid treatment method cannot effectively remove the organic matter in the waste acid

Method used

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  • Method for treating waste acid generated in production process of bromamine acid

Examples

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Comparison scheme
Effect test

Embodiment 1

[0026] Get the waste acid 200ml (CODcr=32500 mg / liter, sulfuric acid acid value 38%) that solvent method produces bromonic acid to produce, be cooled to 20 ℃, after standing and settling for 8 hours, filter. After filtration, the filtrate ICODcr=26480 mg / L. The filtrate was added with 20 g of sodium hypochlorite (available chlorine 9.8%) under stirring, and the addition time was 0.5 hour. After the addition, stir at room temperature for 4 hours, then raise the temperature to 60° C., keep the temperature for 2 hours, and then filter. After filtering the filtrate II CODcr=435mg / liter, the acid value of sulfuric acid is 33%.

Embodiment 2

[0028] Get 200ml of waste acid (CODcr=32500 mg / liter, sulfuric acid acid value 38%) that the solvent method produces bromonic acid to produce, cool down to 25 ℃, after standing and settling for 8 hours, filter. After filtration, the filtrate ICODcr=27790 mg / L. The filtrate was added with 20 g of sodium hypochlorite (available chlorine 9.8%) under stirring, and the addition time was 0.5 hour. After the addition, stir at room temperature for 4 hours, then raise the temperature to 60° C., keep the temperature for 2 hours, and then filter. After filtering the filtrate II CODcr=483mg / liter, the acid value of sulfuric acid is 33.4%.

Embodiment 3

[0030] Get 200ml of waste acid (CODcr=32500 mg / liter, sulfuric acid acid value 38%) that solvent method produces bromonic acid to produce, cool down to 10 ℃, after standing and settling for 8 hours, filter. After filtration, the filtrate ICODcr=26210 mg / L. The filtrate was added with 20 g of sodium hypochlorite (available chlorine 9.8%) under stirring, and the addition time was 0.5 hour. After the addition, stir at room temperature for 4 hours, then raise the temperature to 60° C., keep the temperature for 2 hours, and then filter. Filtrate II CODcr=440 mg / liter after filtration, sulfuric acid acid value 32.9%.

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Abstract

The invention discloses a method for treating waste acid generated in production process of bromamine acid. The method comprises the following steps: (1) physical treatment, namely, cooling the waste acid to precipitating solids and oily matters and removing the solids and oily matters; and (2) chemical treatment method, namely, oxidizing organic matters in the waste acid subjected to physical treatment with an oxidant so that the organic matters are precipitated, and filtering to remove the precipitated organic matters to obtain the treated acid liquid. The treatment method disclosed by the invention is simple and feasible, a great amount of CODcr and organic matters in the waste acid generated in production process of bromamine acid can be removed and the chromaticity is also removed. After treatment, colorless transparent dilute sulfuric acid having CODcr being less than 500 is obtained and the dilute sulfuric acid can be used as brominating, filtering and washing water used in production of bromamine acid and can also be concentrated to prepare high-concentration sulfuric acid again. The device disclosed by the invention is relatively simple and is applicable to industrial production.

Description

technical field [0001] The invention relates to the technical field of purification and treatment of waste acid wastewater, in particular to a treatment method for waste acid produced in the production process of bromic acid. Background technique [0002] Bromic acid is an important dye intermediate used in the manufacture of anthraquinone acid dyes and reactive dyes. Its structure is as follows: [0003] [0004] At present, the production of bromic acid is mainly obtained by using 1-aminoanthraquinone as raw material, followed by sulfonation and bromination. For example, the patent document whose publication number is CN 102617412A discloses a preparation method of bromic acid, which includes (1) sulfonation reaction: using 1-aminoanthraquinone as a raw material, in o-dichlorobenzene solvent, dropwise adding chlorosulfur Acid carries out sulfonation reaction to obtain sulfonated material containing sulfonated product, the weight ratio of 1-aminoanthraquinone and o-dich...

Claims

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Application Information

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IPC IPC(8): C02F9/04C01B17/90
Inventor 陈田木杨洋杨彬澎炫王海民
Owner JIANGSU YUANZHENG CHEM
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