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Waste sulfuric acid recovery treatment method

A disposal method, waste sulfuric acid technology, applied in the direction of separation method, chemical recovery, chemical instruments and methods, etc., can solve the problems of endangering human health and living environment, polluting the environment, waste of sulfuric acid resources, etc., to reduce chroma and reduce impurities Ion content, effect of reducing treatment cost

Pending Publication Date: 2022-07-08
无锡日月水处理有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Sulfuric acid is one of the most basic chemicals. It is widely used in many industries such as pesticides, fertilizers, lead storage batteries, petrochemicals, dyes, non-ferrous metallurgy, printing and dyeing. The dye industry is a large acid consumer, and every ton of dye needs 2 tons of sulfuric acid. However, only about 10% of sulfuric acid enters the reaction as an effective replacement base, and most of the rest is discharged as low-concentration dilute waste acid. At present, printing and dyeing enterprises generally deal with these waste sulfuric acids by direct discharge or simple neutralization This method can reduce the cost of the company, but this treatment method not only wastes a lot of sulfuric acid resources, but also seriously pollutes the environment and endangers human health and living environment

Method used

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  • Waste sulfuric acid recovery treatment method

Examples

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Effect test

Embodiment 1

[0025] A method for recycling and disposing of waste sulfuric acid:

[0026] To the anthraquinone dye-reactive brilliant blue KN-R produced in the production process, the chromaticity is 5820 times, the COD is 7553mg / L, the pH is 1, after diluting the waste sulfuric acid with water to pH 3, add the catalyst, the catalyst dosage is 1g / L, under the irradiation of 250W metal halide lamp, 300W ultrasonic wave and stirring for 10h, the filtrate was obtained after filtration, the D201 resin was added to the ion exchange column, rinsed with deionized water for 40min, and then used 10 times the mass of D201 resin 1mol / L NaOH solution and 1mol / L HCl solution were rinsed alternately for 50min, and finally the resin was rinsed with deionized water to neutrality, then placed in 1mol / L sodium EDTA solution for 100min immersion, air-dried at room temperature and added to the filtrate , the resin dosage is 10g / L, after 25h of adsorption, filtration to obtain recycled sulfuric acid, which i...

Embodiment 2

[0030] A method for recycling and disposing of waste sulfuric acid:

[0031] To the anthraquinone dye-reactive brilliant blue KN-R produced in the production process, the chromaticity is 5820 times, the COD is 7553mg / L, the pH is 1, and the waste sulfuric acid is diluted with water to pH 5, and then the catalyst is added, and the catalyst dosage is 1g / L, under the irradiation of 250W metal halide lamp, 300W ultrasonic and stirring for 20h, the filtrate was obtained after filtration, the D201 resin was added to the ion exchange column, rinsed with deionized water for 50min, and then used 2mol of 10 times the mass of D201 resin. / L NaOH solution and 2mol / L HCl solution were alternately rinsed for 50min, and finally the resin was rinsed with deionized water to neutrality, and then placed in 1mol / L sodium EDTA solution for 120min immersion, air-dried at room temperature and added to the filtrate , the resin dosage is 10g / L, after 25h of adsorption, filtration to obtain recycled s...

Embodiment 3

[0035] A method for recycling and disposing of waste sulfuric acid:

[0036]To anthraquinone dye-reactive brilliant blue KN-R produced in the production process, the chromaticity is 5820 times, the COD is 7553mg / L, the pH is 1, and the waste sulfuric acid is diluted with water to pH 4, then the catalyst is added, and the catalyst dosage is 0.5g / L, under the irradiation of 250W metal halide lamp, 300W ultrasonic wave and stirring for 5h, the filtrate was obtained after filtration, the D201 resin was added to the ion exchange column, rinsed with deionized water for 30min, and then used 8 times the mass of D201 resin. 1mol / L NaOH solution and 1mol / L HCl solution were alternately rinsed for 30min, and finally the resin was rinsed with deionized water to neutrality, then immersed in 1mol / L sodium EDTA solution for 90min, and the filtrate was added after air-drying at room temperature. , the resin dosage is 5g / L, after 20h of adsorption, filtration to obtain recovered sulfuric acid...

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Abstract

The invention relates to the field of waste sulfuric acid treatment processes, in particular to a waste sulfuric acid recovery treatment method, which comprises the following steps: diluting waste sulfuric acid, adding a catalyst, carrying out ultrasonic treatment and stirring treatment for 5-20 hours under an illumination condition, filtering, adding adsorption resin into filtrate, adsorbing for 20-25 hours, filtering, and adjusting the concentration to obtain recovered sulfuric acid, by utilizing the catalytic degradation and adsorption effects of the catalyst and the resin, anthraquinone dye and other organic impurities in the waste sulfuric acid can be purified, the chromaticity is reduced, the waste sulfuric acid can be used as a crude chemical raw material after being recycled, the treatment cost of the waste sulfuric acid is reduced, and sulfuric acid resources are fully utilized.

Description

technical field [0001] The invention relates to the field of waste sulfuric acid treatment technology, in particular to a waste sulfuric acid recovery and disposal method. Background technique [0002] Sulfuric acid is one of the most basic chemicals. It is widely used in pesticides, fertilizers, lead-acid batteries, petrochemicals, dyes, non-ferrous metallurgy, printing and dyeing and many other industries. As a large acid user, the dye industry requires 2 tons of sulfuric acid per ton of dye. However, only about 10% of the sulfuric acid enters the reaction as an effective displacement group, and most of the rest are discharged as low-concentration dilute waste acid. At present, the most common treatment methods for these waste sulfuric acid in printing and dyeing enterprises are direct efflux or simple neutralization. This method can reduce the cost of the company, but this method not only wastes a lot of sulfuric acid resources, but also seriously pollutes the environment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/90B01J31/26B01J20/26B01J20/30B01D15/20
CPCC01B17/90C01B17/905B01J31/26B01J20/265B01D15/20B01J35/39Y02P20/584
Inventor 刘剑姚世明
Owner 无锡日月水处理有限公司
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