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Treatment method for p-beta hydroxyethyl sulfone acetanilide mother liquor waste water

A technology of hydroxyethyl sulfone acetanilide mother and treatment method is applied in the field of treatment of p-β hydroxyethyl sulfone acetanilide mother liquor wastewater, and achieves the effects of good dyeing performance, high reactivity and good lifting power

Active Publication Date: 2014-04-30
ZHEJIANG JINGGUANG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the prior art, there is no method for effectively treating p-β hydroxyethyl sulfone acetanilide mother liquor wastewater

Method used

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  • Treatment method for p-beta hydroxyethyl sulfone acetanilide mother liquor waste water
  • Treatment method for p-beta hydroxyethyl sulfone acetanilide mother liquor waste water
  • Treatment method for p-beta hydroxyethyl sulfone acetanilide mother liquor waste water

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Effect test

Embodiment 1

[0038] 1), the pretreatment of p-β hydroxyethyl sulfone acetanilide mother liquor water:

[0039] Weigh 2500g of p-β-hydroxyethyl sulfone acetanilide mother liquid wastewater, add 130g of sulfuric acid with a mass concentration of 98% and heat up to 100°C for hydrolysis for 3 hours, after the hydrolysis is completely controlled by high-efficiency liquid phase, add an appropriate amount of liquid alkali to neutralize pH=6, neutralize The processed material enters the MVR evaporative crystallization system for desalting and concentration at the same time until the amino value reaches 16% (the main component is p-β-hydroxyethyl sulfone aniline).

[0040] 2), heavy nitrogen:

[0041] Diazo: Add 30g of water and 30g of crushed ice to a 500ml beaker, add 87.85g of K acid, beat at 0-5°C for 1 hour to obtain K acid solution, weigh 11.85g of sodium nitrite, add 50g of water and stir to dissolve, then dropwise add K acid solution During the feeding process, keep the temperature at 0-5°...

Embodiment 2

[0053] 1), the pretreatment of p-β hydroxyethyl sulfone acetanilide mother liquor water:

[0054] Weigh 2500g of p-β-hydroxyethyl sulfone acetanilide mother liquid wastewater, add 120g of sulfuric acid with a mass concentration of 98% and heat up to 90°C for 3.5 hours to hydrolyze. The processed material enters the MVR evaporative crystallization system for desalting and concentration at the same time until the amino value reaches 16% (the main component is p-β-hydroxyethyl sulfone aniline).

[0055] 2), heavy nitrogen:

[0056] Diazo: Add 25g of water and 30g of crushed ice to a 500ml beaker, put in 80.85g of K acid, beat at a temperature of 0-5°C for 1.5h to obtain a K acid solution, weigh 10.9g of sodium nitrite, add 50g of water and stir to dissolve, then add K In the acid solution, keep the temperature at 0-5°C during the feeding process, the Congo red test paper will appear blue, and the starch potassium iodide test paper will appear blue. After adding and reacting for...

Embodiment 3

[0067] 1), the pretreatment of p-β hydroxyethyl sulfone acetanilide mother liquor water:

[0068] Weigh 2500g of p-β-hydroxyethyl sulfone acetanilide mother liquor wastewater, add 140g of sulfuric acid with a mass concentration of 98% and heat up to 100°C for 3 hours for hydrolysis, after the hydrolysis is completely controlled by high-efficiency liquid phase, add an appropriate amount of liquid alkali to neutralize pH=6, neutralize The processed material enters the MVR evaporative crystallization system for desalting and concentration at the same time until the amino value reaches 16% (the main component is p-β-hydroxyethyl sulfone aniline).

[0069] 2), heavy nitrogen:

[0070] Diazo: Add 35g of water and 30g of crushed ice to a 500ml beaker, add 90.35g of K acid, beat at 0-5°C for 1 hour to obtain K acid solution, weigh 12.2g of sodium nitrite, add 50g of water and stir to dissolve, then dropwise add K acid In the solution, keep the temperature at 0-5°C during the feeding ...

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Abstract

The invention discloses a treatment method for p-beta hydroxyethyl sulfone acetanilide mother liquor waste water. The treatment method comprises the following steps of performing pretreatment on p-beta hydroxyethyl sulfone acetanilide mother liquor water to recover p-beta hydroxyethyl sulfone acetanilide in mother liquor waste water, and then sequentially performing diazo reaction, coupling, primary condensation and secondary condensation to prepare a yellow reactive dye. According to the treatment method disclosed by the invention, p-beta hydroxyethyl sulfone acetanilide in the p-beta hydroxyethyl sulfone acetanilide mother liquor waste water produced in the production process of para-ester is reasonably utilized, and p-beta hydroxyethyl sulfone acetanilide in the waste water is used for synthesizing an intermediate of the reactive dye after hydrolysis, so that the waste is turned into treasure, the high-concentration waste water produced in the production process of the para-ester can achieve up-to-standard emission after treatment at the relatively low cost, and the para-ester and the related industry of the para-ester can realize sustained development.

Description

technical field [0001] The invention relates to the technical field of industrial wastewater treatment, in particular to a method for treating p-β-hydroxyethylsulfone acetanilide mother liquor wastewater. Background technique [0002] In recent years, with the rapid development of industry, my country's dye industry has achieved great development, but it has also brought serious environmental pollution problems. Among them, the wastewater produced by the dye industry and dye intermediate industry is one of the most polluted industrial wastewater. Para-ester is an important intermediate of reactive dyes. It is used to synthesize EF type, KN type, M / KM type, ME type and other vinyl sulfone-containing reactive dyes, and is widely used in printing and dyeing, textile, chemical and other industries. The existing para-ester production process produces a large amount of wastewater while obtaining the target product para-ester. Among the wastewater, the wastewater containing p-β-hy...

Claims

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Application Information

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IPC IPC(8): C09B62/51C02F1/00
Inventor 王国林肖凤兰
Owner ZHEJIANG JINGGUANG IND
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