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A treatment method for recycling dyeing residue

A technology for dyeing residue and treatment method, applied in the field of wastewater treatment in the printing and dyeing industry, can solve the problems of complex equipment, complex treatment process, and high treatment costs, and achieve the effect of reducing operating costs, easily reaching discharge standards, and achieving discharge standards.

Active Publication Date: 2016-08-10
沈阳惠宇化工环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The above three methods can all achieve a certain processing effect, but relatively speaking, there are problems such as high processing cost, complicated equipment, and complicated processing process.

Method used

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  • A treatment method for recycling dyeing residue

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Effect test

Embodiment 1

[0047] This embodiment provides a treatment method for recycling the dyeing residue, adding an organic liquid to the acidic dyeing residue, so that the color-developing substances in the dyeing residue are separated into the organic liquid, thereby decolorizing the dyeing residue ; The dyeing residue after decolorization treatment is reused according to the dyeing process.

[0048] The method specifically comprises: collecting 6000 ml of dyeing residue in a reactor, slowly adding sulfuric acid to make the pH of the residue 3-4. Mix tributyl phosphate and aviation kerosene at a volume ratio of 2:8 to obtain an organic liquid, take 200ml of the organic liquid and add it to the dyeing residue with adjusted pH for decolorization treatment, react for 30 minutes, let it stand for 30 minutes, and separate the lower layer for decolorization Nearly colorless dyeing residue after treatment and loaded organic liquid loaded with dyes. Add 35ml of sodium hydroxide solution with a mass con...

Embodiment 2

[0055] This embodiment provides a treatment method for recycling the dyeing residue, adding an organic liquid to the acidic dyeing residue, so that the color-developing substances in the dyeing residue are separated into the organic liquid, thereby decolorizing the dyeing residue ; The dyeing residue after decolorization treatment is reused according to the dyeing process.

[0056] The method specifically comprises: collecting 6000 ml of dyeing residue in a reactor, slowly adding sulfuric acid to make the pH of the residue 3-4. Mix trioctyl phosphate and aviation kerosene in a volume ratio of 3:7 to obtain an organic liquid. Take 160ml of the organic liquid and add it to the dyeing residue with adjusted pH for decolorization treatment. After reacting for 45 minutes, let it stand for 45 minutes, and separate the lower layer for decolorization. After treatment, the near-colorless dyeing residue and the loaded organic liquid loaded with dyes. Add 40ml of potassium hydroxide solu...

Embodiment 3

[0060] This embodiment provides a treatment method for recycling the dyeing residue, adding an organic liquid to the acidic dyeing residue, so that the color-developing substances in the dyeing residue are separated into the organic liquid, thereby decolorizing the dyeing residue ; The dyeing residue after decolorization treatment is reused according to the dyeing process.

[0061] The method specifically comprises: collecting 6000 ml of the raffinate in a reactor, and slowly adding sulfuric acid to make the pH of the raffinate 3-4. Mix trioctylphosphine and sulfonated kerosene evenly at a volume ratio of 4:6 to obtain an organic liquid, take 150ml of the organic liquid and add it to the dyeing residue with adjusted pH for decolorization treatment, react for 60 minutes, let it stand for 60 minutes, and separate The near-colorless dyeing residue after the decolorization treatment of the lower layer and the loaded organic liquid loaded with dyes. Add 30ml of sodium carbonate so...

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Abstract

The invention provides a treatment method for recycling dyeing residual liquid. The method comprises the following steps: adding an organic liquid into the acidic dyeing residual liquid to separate color developing substances in the dyeing residual liquid into the organic liquid so as to decolorize the dyeing residual liquid; and recycling the decolorized dyeing residual liquid according to a dyeing process. In the method, the dyeing residual liquid is decolorized by utilizing the organic liquid, so that the decolorized dyeing residual liquid has low chromaticity and the decolorization rate can be over 99 percent; moreover, salt in the residual liquid can be maintained, so that the decolorized salt-containing dyeing residual liquid can be recycled in the dyeing process, salt in the dyeing residual liquid can be reasonably and effectively utilized, salt adding amount in the dyeing process can be reduced, emission of high-salt high-chromaticity residual liquid can be avoided, production cost can be saved, and pressure of sewage treatment can be relieved.

Description

technical field [0001] The invention relates to a wastewater treatment technology in the printing and dyeing industry, in particular to a treatment method for recycling dyeing residue. Background technique [0002] Dyeing residue refers to the dyeing wastewater discharged just after dyeing, excluding washing water. In the dyeing residue, especially the dyeing residue of reactive dyes, the concentration of pollutants is high, and the main components are incompletely reacted dyes and their hydrolyzates, as well as soda ash and salt as dyeing accelerators and leveling agents. The raffinate contains 6% salt and has a chroma of 40,000 to 50,000 times, which is difficult to degrade and is a difficult point in the treatment of wastewater in the printing and dyeing industry. [0003] The traditional printing and dyeing wastewater treatment process is to mix the high-salt dyeing residue with the wastewater produced in other production processes, reduce the chroma and salt content of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/00C02F103/30
CPCC02F1/00C02F2103/30
Inventor 程迪欧云川杨宏伟赵静殊
Owner 沈阳惠宇化工环保科技有限公司
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