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Method for extracting and recovering tobias acid from tobias acid wastewater

A technology for recovering Tubic acid and Tubic acid, applied in chemical instruments and methods, alkali metal sulfite/sulfite, water pollutants, etc., can solve the problem of large consumption of ammonia water and hydrochloric acid, long energy consumption, increased vomiting In order to reduce the acidity, save time and improve efficiency

Active Publication Date: 2018-01-19
XIANGSHUI HENRYDA TECH CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although these methods can obtain high-purity tunic acid, they all go through a series of steps that consume a lot of energy and take a long time, such as cooling crystallization and acid precipitation, and ammonia formulation and acid precipitation will consume a large amount of ammonia and hydrochloric acid. And further increase the content of inorganic salts and ammonia nitrogen in the tunic acid wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Step (1), fully mix 1000ml Tuburic acid waste water with the extraction agent at a ratio of 1:1 to oil and water under normal temperature and pressure, and obtain the first raffinate phase and the first extracted water after layering. The extraction agent is determined by mass The concentration is 10% triisooctylamine, 50% sulfonated kerosene and 40% tributyl phosphate;

[0027] Step (2), fully mix the first extracted water and the extractant according to the oil-water ratio of 1:1, and obtain the second raffinate phase and the second extracted water after layering. The extractant is the same as that of step (1). Extracting agent;

[0028] Step (3), combine the first raffinate phase and the second raffinate phase, then add liquid caustic soda until the pH value is 8, heat to 60°C for thorough mixing, and obtain stripping liquid and extractant after layering, extractant Recycled for primary and secondary extraction;

[0029] Step (4), centrifuge the back-extraction to ...

Embodiment 2

[0031] Step (1), fully mix 1000ml Tuburic acid waste water with the extraction agent at a ratio of 1:1 to oil and water under normal temperature and pressure, and obtain the first raffinate phase and the first extracted water after layering. The extraction agent is determined by mass The concentration is 10% tri-n-butylamine, 50% sulfonated kerosene and 40% tributyl phosphate;

[0032] Step (2), fully mix the first extracted water and the second extractant according to the oil-water ratio of 1:1, and obtain the second raffinate phase and the second extracted water after layering, and the extractant is the same as in the step (1 ) extractant;

[0033] Step (3), combine the first raffinate phase and the second raffinate phase, then add liquid caustic soda until the pH value is 8, heat to 60°C for thorough mixing, and obtain stripping liquid and extractant after layering, extractant Recycled for primary and secondary extraction;

[0034] Step (4), centrifuge the back-extraction...

Embodiment 3

[0036] Basically the same as Example 1, the only difference is that the complexing agent is a mixture of tri-isooctylamine and tri-n-butylamine according to the mass ratio of 1:1, 2.6g of torrentic acid obtained in this embodiment, and the content of torrentic acid is 92.2% .

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PUM

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Abstract

The invention relates to a method for extracting and recovering tobias acid from tobias acid wastewater. The method comprises the following steps: mixing tobias acid wastewater and a first extractionagent, and layering to obtain a first raffinate phase and first extracted water; mixing the first extracted water and a second extraction agent, and layering to obtain a second raffinate phase and second extracted water; merging the first raffinate phase and the second raffinate phase, adding liquid caustic soda to be mixed, and layering to obtain strip liquor and an extraction agent; and performing centrifugal separation on the strip liquor so as to obtain a solid material, and evaporating the solid material to dryness, thereby obtaining the tobias acid. According to the method disclosed by the invention, the recovery efficiency is improved, the time is saved, and the cost is reduced. Meanwhile, the COD (Chemical Oxygen Demand) of the strip liquor obtained by extraction-back extraction isdecreased from 40000mg / l to 4000mg / l, the COD removal rate reaches 90%, the acidity is decreased from 40-60mg / l to 20mg / l or less, the cost during neutralization is reduced, and the tobias acid reaching the standard can be directly obtained.

Description

technical field [0001] The invention belongs to the technical field of producing chemical intermediates, and relates to a technical method for reusing waste pollutants in the production of tobacid, in particular to a method for extracting and recovering tobacid from waste water of tobacid. Background technique [0002] Tuccinic acid is an intermediate of azo dyes, mainly used in the manufacture of dye products such as J acid and Lisol red R. The chemical name is: 2-amino-1-naphthalenesulfonic acid. At present, the production method of Tuo's acid is mainly to obtain 2-naphthol-1 sulfonic acid through sulfonation of chlorosulfonic acid with 2-naphthol; Afterwards, through alkali neutralization, obtain 2-naphthol-1 sodium sulfonate, then In the presence of acidic ammonium sulfite, liquid ammonia is introduced into the autoclave for ammoniation reaction, and it is converted into 2-amino-1-naphthalenesulfonic acid. After acidification, crystallization is precipitated, and topori...

Claims

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Application Information

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IPC IPC(8): C07C303/44C07C309/47C01D5/00C02F1/26C02F9/10C02F101/34C02F101/38
Inventor 张正富夏协兵陈惠元易元龙徐刚
Owner XIANGSHUI HENRYDA TECH CHEM
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