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Method for preparing flocculant WK-1 applicable to decolorizing acid dye and reactive dye

A technology of reactive dyes and acid dyes, applied in the fields of resource recovery and utilization, environmental pollution and treatment, can solve problems such as secondary pollution, and achieve the effect of excellent effect and convenient use.

Inactive Publication Date: 2011-06-22
NANTONG HUANYU SILK
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Problems solved by technology

[0005] In order to effectively solve the problem of secondary pollution generated during the use of flocculants, the present invention provides a preparation method of flocculants suitable for the decolorization of acid dyes and reactive dyes

Method used

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  • Method for preparing flocculant WK-1 applicable to decolorizing acid dye and reactive dye
  • Method for preparing flocculant WK-1 applicable to decolorizing acid dye and reactive dye

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preparation example Construction

[0027] A kind of flocculant preparation method applicable to the decolorization of acid dyes and reactive dyes, adopts following steps:

[0028] A, collect the woolen wool of the woolen mill and combed straw hair, acidify it with 60% sulfuric acid at room temperature for 1 to 1.5 hours to partially hydrolyze the grass hair, filter out excess sulfuric acid, and obtain the hydrolyzed wool use;

[0029] B, the chitosan that deacetylation degree is 85% is slowly dissolved in the acetic acid solution of 1% by mass percentage, fully stirs, makes chitosan acetic acid solution;

[0030] C. Gradually add the hydrolyzed wool to the chitosan-acetic acid solution and stir for 30 minutes;

[0031] D. Add 5% NaOH solution dropwise while stirring, adjust the pH to 9-10, continue to stir at a slow speed for 20 minutes, and dehydrate and dry at a temperature below 60°C for later use. (It can also be used directly without dehydration.) The following is the application and test data of the dec...

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Abstract

The invention relates to the development of a flocculant WK-1 applicable to decolorizing printing and dyeing wastewater of an acid dye and a reactive dye, which belongs to the field of environmental pollution and controlling as well as resources recovery and utilization. A method for preparing the flocculant WK-1 applicable to decolorizing the acid dye and the reactive dye comprises the followingsteps: A, performing acidification on seedy wools with 60-percent sulfuric acid for 1 to 1.5 hours at room temperature to hydrolyze part of the seedy wools, and filtering the redundant sulfuric acid to obtain hydrolysis wool for standby; B, slowly dissolving chitosan of which the deacetylation degree is 85 percent in 100 milliliters of a 1 percent acetum, and stirring the mixture sufficiently to prepare a chitosan acetum; C, adding the hydrolysis wool in to the chitosan acetum gradually, and stirring the mixture for 30 minutes; and D, dropping a 5 percent NaOH solution into the mixture while stirring, adjusting the pH value to between 9 and 10, and continuing to stir the mixture slowly for 20 minutes to obtain a finished product. The method has he advantages of simplicity, practicability,low cost and less discharge capacity, and is a method and a process with greater practical significance.

Description

technical field [0001] The invention relates to the development of a decolorizing flocculant suitable for printing and dyeing wastewater of acid dyes and reactive dyes, and belongs to the fields of environmental pollution and treatment, resource recovery and utilization. Background technique [0002] my country is the largest country in textile printing and dyeing, and the textile printing and dyeing industry is a major player in industrial wastewater discharge, accounting for about 35% of the entire industrial wastewater discharge. The resulting ecological damage and economic losses are immeasurable. Therefore, in order to realize the sustainable development of the printing and dyeing industry, the pollution problem of the printing and dyeing industry must be solved first. [0003] Printing and dyeing wastewater has the characteristics of high chroma and changeable color. The chroma and COD value of wastewater with dyes are high, which will hinder the self-purification of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F103/30
Inventor 许良英冯国平张军杨蕴敏尚亚力田恬
Owner NANTONG HUANYU SILK
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