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Process for recycling ammonium sulfate and synthesizing acidic dye by T-acid mother liquor wastewater

A technology for recycling acid dyes and wastewater, applied in disazo dyes, ammonium sulfate and other directions, can solve the problems of inhibiting the normal development of the H acid industry, and achieve good economic and social benefits, and good solubility.

Active Publication Date: 2012-11-14
CHUYUAN HIGH NEW TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology extracts crude tarnish water containing various chemical compounds like acids or bases during production processes for synthetic fibers such as polyamide fiber. These substances have negative impact on human health when released over time due to their harmful effect upon animal species that consume them. To solve this problem, these waters were then treated separately before being reused without affecting any other products produced therefrom. Overall, this new method allows us to recycle valuable materials while minimizing environmental concerns associated with disposal methods used today.

Problems solved by technology

This patented technical solution described by the inventors relates to improving the recovery rate or efficiency of producing specific types of acids from certain substances that have high concentrations of nitrogen compounds (TAN) such as naphthaimides called 3HN).

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1) In a reaction vessel with a stirring device, mix the T-acid mother liquor wastewater and tert-butyl quaternary ammonium salt at a ratio of 4:1, and start stirring at the same time at a stirring speed of 100 rpm. After stirring and mixing for 30 minutes, let it stand for 1 After hours of stratification, the obtained water phase is recovered by conventional concentration process 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 liquid is concentrated under reduced pressure by conventional technology until the amino value reaches 110g / kg is qualified, obtains 3.5.7-naphthylamine trisulfonate and 4.6.8-naphthylamine trisulfonate as the T acid mother liquor treatment liquid of main component;

[0018] 2) Weigh 172.35Kg of 100% T-acid mother liquor treatment solution, put it into a diazo kettle with stirring, start stirring, stir at 45rpm for 8 mi...

Embodiment 2

[0026] 1) In a reaction vessel with a stirring device, mix the T-acid mother liquor wastewater and tert-butyl quaternary ammonium salt at a ratio of 5:1, and start stirring at the same time at a stirring speed of 110rpm. After stirring and mixing for 30 minutes, let it stand for 1 After hours of stratification, the obtained water phase is recovered by conventional concentration process ammonium sulfate; the obtained organic phase is added with liquid caustic soda to adjust the pH of the organic phase to 6.3 for back extraction, and the obtained back extraction liquid is concentrated under reduced pressure by conventional technology until the amino value reaches 130g / kg is qualified, obtains 3.5.7-naphthylamine trisulfonate and 4.6.8-naphthylamine trisulfonate as the T acid mother liquor treatment liquid of main component;

[0027] 2) Weigh 258.53Kg of 100% T-acid mother liquor treatment solution, put it into a diazo kettle with stirring, start stirring, stir at 45rpm for 9 min...

Embodiment 3

[0035] 1) In a reaction vessel with a stirring device, mix the T-acid mother liquor wastewater and tert-butyl quaternary ammonium salt at a ratio of 6:1, and start stirring at the same time at a stirring speed of 120rpm. After stirring and mixing for 30 minutes, let it stand for 1 After hours of stratification, the obtained aqueous phase is recovered by conventional concentration process 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 conventional technology until the amino value reaches 140g / kg is qualified, obtains 3.5.7-naphthylamine trisulfonate and 4.6.8-naphthylamine trisulfonate as the T acid mother liquor treatment liquid of main component;

[0036] 2) Weigh 344.7Kg of 100% T acid mother liquor treatment solution, put it into a diazo kettle with stirring, start stirring, stir at 45rpm for 10 m...

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PUM

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Abstract

The invention relates to a process for recycling ammonium sulfate and synthesizing acidic dye, and in particular relates to a process for recycling ammonium sulfate and synthesizing acidic dye by T-acid mother liquor wastewater. The process comprises the steps of carrying out extraction, separation and back extraction on the T-acid mother liquor, carrying out multiple-effect evaporation and concentration on extracted water phase to recycle the inorganic product, namely the ammonium sulfate, and reacting an organic matter obtained from the extraction with amino naphthalene sulfonic acid, R salt (namely G-salt wastewater regenerant) or naphthylamine, naphthol and R salt through double-nitrogen and double-coupling reaction to synthesize the finished product of the acid dye. The process can be used for avoiding the pollution caused by the T-acid wastewater and preparing the acid dye, and can solve the problems that the T-acid mother liquor wastewater is mainly discharged through comprehensive wastewater treatment, organic matters in the wastewater are not recycled, the effective value of the wastewater is not achieved, and the normal development of an H-acid industry is seriously inhibited. The acid dye synthesized by the process is good in dissolubility, meets the application requirement of medium-high-class acid dye, and has favorable economical and social benefits.

Description

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Claims

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Application Information

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Owner CHUYUAN HIGH NEW TECH GRP