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Extracting agent and method for treating reactive dyeing wastewater

A technology for reactive dyes and dyeing wastewater, applied in the field of dye dyeing wastewater treatment, can solve problems such as large loss of extractant, slow oil-water separation, and environmental impact, and achieve low volatility, fast phase separation, and low equipment requirements. Effect

Active Publication Date: 2014-12-17
GUANGDONG ESQUEL TEXTILES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This puts more stringent requirements on the sealing of the equipment used in the industrial application of the extraction agent, the working environment of the workers, and the fire and explosion protection of the factory area. If the extraction agent leaks, it will have a greater impact on the surrounding environment.
[0005] 2) The oil-water separation speed of the extractant is slow during use, and the treatment efficiency is low; it is easy to form W / O type and O / W type emulsion, resulting in a large loss of the extractant, and because the extractant remains in the water phase, it will cause processing Wastewater reuse is limited

Method used

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  • Extracting agent and method for treating reactive dyeing wastewater

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Embodiment 1

[0030] The present embodiment provides a kind of method utilizing solid-liquid extraction technology to process reactive dye dyeing wastewater, and it comprises the following steps:

[0031] Take the residual liquid discharged after dyeing with a formula, the appearance is yellow, the pH value is 10.84, the COD is 2040mg / L, and the chroma is 1024 times;

[0032] heating and stirring 35% of trialkylamine, 15% of isomeric eicosanol, and 50% of solid paraffin wax to obtain a solid extractant;

[0033] Add the extractant and waste water with a pH value of 1-2 into the extraction tank at a mass ratio of 1:30, raise the temperature to 60°C, stir for 10 minutes to make the two phases reach extraction equilibrium, cool to room temperature, the extractant solidifies, and stand for 30 minutes to filter Separate the aqueous phase and the solid extractant;

[0034] Then mix the solid extractant with 10% sodium hydroxide aqueous solution at a mass ratio of 1:10 and send it to the regenera...

Embodiment 2

[0037] The present embodiment provides a kind of method utilizing solid-liquid extraction technology to process reactive dye dyeing wastewater, and it comprises the following steps:

[0038] Take the residual liquid discharged after dyeing with a formula, the appearance is blue, the pH value is 10.81, the COD is 2320mg / L, and the chroma is 8192 times;

[0039] heating 35% of trialkylamine, 15% of isomeric eicosanol, and 50% of solid paraffin wax, stirring evenly and cooling down to obtain an extractant;

[0040] Add the extractant and waste water with a pH value of 1-2 into the extraction pool at a mass ratio of 1:20, raise the temperature to 60°C, stir for 30 minutes to make the two phases reach extraction equilibrium, let stand, cool to room temperature, the extractant solidifies, and filter Separate the aqueous phase and the solid extractant;

[0041] Then mix the solid extractant with 10% aqueous sodium hydroxide solution at a volume ratio of 1:10 and send it to the regen...

Embodiment 3

[0044] The present embodiment provides a kind of method utilizing solid-liquid extraction technology to process reactive dye dyeing wastewater, and it comprises the following steps:

[0045] Take the residual liquid discharged after dyeing with a formula, the appearance is black, the pH value is 10.55, the COD is 1400mg / L, and the chroma is 16384 times;

[0046] heating 35% of trialkylamine, 15% of isomeric eicosanol, and 50% of solid paraffin wax, stirring evenly and cooling down to obtain an extractant;

[0047]Add the extractant and the waste water with adjusted pH value of 1-2 into the extraction tank according to the mass ratio of 1:30, raise the temperature to 60°C, stir for 30 minutes to make the two phases reach extraction equilibrium, let stand, cool to room temperature, and the extractant solidifies , filtering and separating the aqueous phase and the solid extractant;

[0048] Then mix the solid extractant with 10% aqueous sodium hydroxide solution at a volume rati...

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Abstract

The invention provides an extracting agent and a method for treating reactive dyeing wastewater. The extracting agent is composed of the following components in percentage by mass: 20-50% of complexing agent, 8-30% of cosolvent and the balance of diluent, wherein the complexing agent is trialkylamine; the cosolvent is C8-C25 normal alcohol or isomeric alcohol; and the diluent is a substance which is a solid at room temperature and is a liquid at the temperature higher than the room temperature. The method comprises the steps of mixing an extracting agent and reactive dyeing wastewater according to the mass ratio of 1: (20-30); heating until melting the extracting agent, and extracting for 10-20 minutes under stirring; cooling to condense the extracting agent; and filtering after standing for a proper period of time to obtain the treated wastewater and the treated extracting agent. According to the method provided by the invention, the reactive dyeing wastewater is treated by using the solid extracting agent, so that hydrolyzed dyes and polar organic compounds in the dyeing wastewater can be effectively removed; and the primarily-treated wastewater has extremely-low chroma and COD (Chemical Oxygen Demand) so as to be directly used for a dyeing process in the next cycle.

Description

technical field [0001] The invention relates to an extractant and a method for treating reactive dye dyeing wastewater, belonging to the technical field of dye dyeing wastewater treatment. Background technique [0002] At present, reactive dyes are mostly used in the dyeing of cotton fabrics. During the dyeing process, due to the hydrolysis of the active groups in the water medium, not only a large amount of reactive dyes are wasted, but also a large amount of water is consumed, and a large amount of high-color sewage that is difficult to treat will be discharged. , which is also an insurmountable bottleneck of reactive dyes. [0003] The technical scheme disclosed in CN102603025A adopts isomeric alcohols with a carbon chain of 14-25 as a cosolvent to prepare an extractant, and is used in the treatment of reactive dye production wastewater. Although it has a good effect of removing chroma and polar organic matter, But there are still the following problems: [0004] 1) The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/26
Inventor 邓勇张玉高邱孝群
Owner GUANGDONG ESQUEL TEXTILES CO LTD
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