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Wastewater treatment method of para-ester acetanilide route

A wastewater treatment and acetanilide technology, applied in water/sewage treatment, natural water treatment, heating water/sewage treatment, etc., can solve the problem of producing sulfuric acid wastewater, achieve no secondary pollution, good heating effect, lower boiling point Effect

Inactive Publication Date: 2018-09-25
新乡市锦源化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the chlorosulfonation step of the acetanilide route is an equilibrium reaction, a large amount of excess chlorosulfonic acid must be used to participate in the reaction in order to increase the yield, resulting in a large amount of sulfuric acid wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of wastewater treatment method of the acetanilide route of para-ester, comprising:

[0039] The evaporation pipe is arranged approximately vertically, and 8 heating rings are arranged side by side on the inner wall thereof from top to bottom. Control the heating temperature of the heating ring at 95-100°C to preheat for 30-45 minutes, drop 5L of chlorosulfonated wastewater from the top of the evaporation pipe through 40 droppers, and drop it to the bottom of the evaporation pipe at an initial speed of 2cm / s. Introduce hot air at 120-130°C, ultrasonically treat the inside of the evaporation pipeline at a frequency of 1.2-2.0MHz, and at the same time pump air at the top of the evaporation pipeline to keep the pressure in the evaporation pipeline at 0.6-0.7atm. Collect the liquid that drips into the bottom of the evaporating pipe to obtain a waste water concentrate with an acidity of 73.6%.

[0040] The raw material of aniline was prepared according to the mass rat...

Embodiment 2

[0042] A kind of wastewater treatment method of the acetanilide route of para-ester, comprising:

[0043]The evaporation pipe is arranged approximately vertically, and six heating rings are arranged side by side on its inner wall from top to bottom. Control the heating ring heating temperature at 100-110°C to preheat for 30-45 minutes, drop 5L of chlorosulfonated wastewater from the top of the evaporation pipe through 48 droppers, and drop it to the bottom of the evaporation pipe at an initial speed of 3cm / s while dripping Introduce hot air at 110-120°C, ultrasonically treat the inside of the evaporation pipeline at a frequency of 1.2-2.0MHz, and pump air at the top of the evaporation pipeline to keep the pressure in the evaporation pipeline at 0.6-0.7atm. Collect the liquid that drips into the bottom of the evaporating pipe to obtain a waste water concentrate with an acidity of 75.1%.

[0044] The raw material of aniline was prepared according to the mass ratio of wastewater...

Embodiment 3

[0046] A kind of wastewater treatment method of the acetanilide route of para-ester, comprising:

[0047] The evaporation pipe is arranged approximately vertically, and six heating rings are arranged side by side on its inner wall from top to bottom. Control the heating temperature of the heating ring at 110-120°C to preheat for 30-45 minutes, drip 5L of chlorosulfonated wastewater from the top of the evaporation pipe through 52 droppers, and drop it to the bottom of the evaporation pipe at an initial speed of 4cm / s while dripping Introduce hot air at 120-130°C, ultrasonically treat the inside of the evaporation pipeline at a frequency of 1.2-2.0MHz, and at the same time pump air at the top of the evaporation pipeline to keep the pressure in the evaporation pipeline at 0.6-0.7atm. Collect the liquid that drips into the bottom of the evaporating pipe to obtain a waste water concentrate with an acidity of 75.8%.

[0048] The raw material of aniline was prepared according to the...

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Abstract

The invention discloses a wastewater treatment method of a para-ester acetanilide route, and belongs to the field of para-ester wastewater treatment. The method is used for treating chlorosulfonated wastewater, and comprises the following steps: concentrating the chlorosulfonated wastewater: dripping the chlorosulfonated wastewater from the top of an evaporation pipeline through a plurality of droppers, arranging a plurality of heating rings on the evaporation pipeline side by side from top to bottom, controlling the heating temperature of the heating rings to be 95 to 120 DEG C, performing air exhaust at the top end of the evaporation pipeline to maintain the pressure intensity in the evaporation pipeline to be 0.6 to 0.8 atm, collecting liquid dripped into the bottom of the evaporation pipeline to obtain a wastewater concentrate, and reacting the wastewater concentrate with aniline to obtain p-aminobenzenesulfonic acid. The process is simple, the treatment efficiency is high, and resources are comprehensively utilized.

Description

technical field [0001] The invention relates to the field of waste water treatment of para-esters, and in particular to a waste water treatment method of the acetanilide route of para-esters. Background technique [0002] Para-ester, alias p-β-sulfone ethylsulfoneaniline, vinylsulfone sulfate, 4-sulfone ethylsulfoneaniline, p-β-hydroxyethylsulfoneaniline sulfate, p-β-hydroxyethylsulfoneaniline sulfate . Para-ester is an important intermediate of reactive dyes, and is used to synthesize reactive dyes containing vinylsulfone groups such as EF type, KN type, M / KM type, and ME type. [0003] The para-ester is a temporary water-soluble group, which can not only improve the solubility of the dye when it is applied, but also the reactive dye containing hydroxyethyl sulfone sulfate group has a low affinity to the fiber during dyeing, which may achieve the effect of level dyeing and generate Dye-fiber ether bond, ether bond has good acid resistance and thermal stability, which is b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/04C02F1/36C07C303/08C07C309/46C02F103/36
CPCC02F1/043C02F1/36C02F2103/36C02F2301/063C07C303/08C07C309/46
Inventor 闫玲玲蔡红新王真真魏艳军魏宗良
Owner 新乡市锦源化工有限公司