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Method for synthesis of active printing dye from T acid mother liquor wastewater

A technology of reactive printing and acid masterbatch, which is applied in the direction of reactive dyes, azo dyes, organic dyes, etc., can solve the problems of inhibiting the normal development of the H acid industry, and achieve high market promotion value, good lifting power, and low directness.

Active Publication Date: 2013-07-24
CHUYUAN HIGH NEW TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The impact of this problem has seriously inhibited the normal development of the H acid industry
[0003] T acid mother liquor wastewater is the largest amount of wastewater in the H acid production process, and its important components are 3.5.7-naphthylamine trisulfonate and 4.6.8-naphthylamine trisulfonate and a large amount of inorganic salt ammonium sulfate, etc. COD (oxygen consumption ) content of 70,000 mg / l and inorganic salt content of 400,000 mg / l. At present, there is no economical and reasonable treatment method for T acid mother liquor wastewater at home and abroad

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1), the pretreatment of T acid mother liquor water:

[0025] Mix T-acid mother liquor wastewater with tert-butyl quaternary ammonium salt in a ratio of 4:1, start stirring at the same time, the stirring speed is 100rpm, after stirring and mixing for 30 minutes, let stand for 1 hour to separate layers, and the obtained water phase is recovered by a conventional concentration process. Product ammonium sulfate; the obtained organic phase is added with liquid caustic soda to adjust the pH of the organic phase to 6.0 for back extraction, and the obtained back extraction solution is concentrated under reduced pressure by a conventional process until the amino value reaches 110g / kg, which is qualified to obtain 3.5.7-trisulfonic acid Naphthylamine and 4.6.8-naphthylamine trisulfonate are T acid treatment liquids with main components;

[0026] 2), shrink:

[0027] Add 126.5kg of para-ester dry powder to 450L of water, and at the same time add 90kg of sodium bicarbonate dry pow...

Embodiment 2

[0039] 1), the pretreatment of T acid mother liquor water:

[0040] Mix T-acid mother liquor wastewater with tert-butyl quaternary ammonium salt in a ratio of 5:1, start stirring at the same time, the stirring speed is 120rpm, after stirring and mixing for 30 minutes, let stand for 1 hour to separate layers, and the obtained water phase is recovered by a conventional concentration process. Product ammonium sulfate; the obtained organic phase is added with liquid caustic soda to adjust the pH of the organic phase to 6.5 for back extraction, and the obtained back extraction liquid is concentrated under reduced pressure by a conventional process until the amino value reaches 120g / kg, which is qualified to obtain 3.5.7-trisulfonic acid Naphthylamine and 4.6.8-naphthylamine trisulfonate are T acid treatment liquids with main components;

[0041] 2), shrink:

[0042] Add 189.8kg of para-ester dry powder to 675L of water, and add 135 kg of sodium bicarbonate dry powder to completely...

Embodiment 3

[0054] 1), the pretreatment of T acid mother liquor water:

[0055] Mix T-acid mother liquor wastewater with tert-butyl quaternary ammonium salt in a ratio of 6:1, start stirring at the same time, the stirring speed is 120rpm, after stirring and mixing for 30 minutes, leave it to stand for 1 hour to separate layers, and the obtained water phase is recovered by a conventional concentration process. Product ammonium sulfate; the obtained organic phase is added with liquid caustic soda to adjust the pH of the organic phase to 6.5 for back extraction, and the obtained back extraction solution is concentrated under reduced pressure by a conventional process until the amino value reaches 140g / kg, which is qualified to obtain 3.5.7-trisulfonic acid Naphthylamine and 4.6.8-naphthylamine trisulfonate are T acid treatment liquids with main components;

[0056] 2), shrink:

[0057] Add 284.7kg of para-ester dry powder to 1013L of water, and at the same time add 203kg of sodium bicarbona...

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Abstract

The invention relates to a method for synthesis of an active printing dye from T acid mother liquor wastewater and belongs to the technical field of chemical engineering. The method realizes synthesis of the active printing dye by condensation, diazotization and coupling elementary reactions. The active printing dye obtained by the method has high dissolvability, low substantivity, strong liftingpower, high quality and a low production cost, can completely satisfy quality and cost requirements from printing and dyeing customers, has a high market promotion value, and further promotes sustainable production of an H acid. The method effectively reduces organic components of T acid mother liquor wastewater and is convenient for standardized discharge of T acid mother liquor wastewater.

Description

technical field [0001] The invention relates to a method for synthesizing reactive printing dyes by using T-acid mother liquor wastewater, which belongs to the technical field of chemical industry. Background technique [0002] H acid is a special intermediate for the manufacture of dyes, widely used in printing and dyeing, textile, chemical and other industries. The traditional H-acid production process produces a large amount of wastewater while obtaining the target product H-acid, among which T-acid mother liquor wastewater accounts for the largest proportion and is the most difficult to treat. At present, T-acid mother liquor wastewater is mainly discharged after comprehensive wastewater treatment, and the organic matter has not been recovered, and its effective value has not been realized. The impact of this problem has seriously inhibited the normal development of the H acid industry. [0003] T acid mother liquor wastewater is the largest amount of wastewater in the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B62/513C09B67/24C01C1/24
Inventor 杨鹏廖杰彭常文张爱兵曾炎花李敏
Owner CHUYUAN HIGH NEW TECH GRP
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