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Xanthate cationic double-modified straw fiber printing and dyeing wastewater treatment agent and preparation method thereof

A technology of straw fiber and xanthate, which is applied in textile industry wastewater treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. The natural polymer flocculant is easy to gelatinize and condense into a frozen state, etc., to achieve excellent water solubility, not easy to gelatinize, and good acid and alkali resistance

Active Publication Date: 2019-01-01
JIANGYIN POLYTECHNIC COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In practical application, it is found that some natural modified polymer flocculants are not resistant to high temperature. When the temperature is higher than 40°C, most of the natural polymer flocculants are easy to gelatinize, condense into a frozen state and fail

Method used

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  • Xanthate cationic double-modified straw fiber printing and dyeing wastewater treatment agent and preparation method thereof

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Experimental program
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Effect test

Embodiment １

[0027]Xanthate cation double-denatured straw fiber printing and dyeing wastewater treatment agent is obtained by extracting straw fiber from straw and undergoing xanthate cation double-denaturation. The extraction method of the straw fiber is as follows: peel the wheat straw, cut it into small pieces, clean it with distilled water, boil it in boiling water for 1 hour, dry it in an oven, and pulverize it twice with a pulverizer to obtain the straw powder for later use. In the bottle, add nitric acid-ethanol mixed solution with a volume ratio of 1:4 to the reaction bottle to make the solid-liquid ratio reach 1:25g / mL, then install a condensing reflux tube on the reaction bottle, condense and reflux for 1.5h, and heat in a boiling water bath After the powder in the reaction bottle turns white, the residue is washed with nitric acid-ethanol mixture, then washed with hot pure water until neutral, and finally washed twice with absolute ethanol, filtered with suction, and dried to obt...

Embodiment 2

[0033] The synthetic method of xanthate cationic double-modified straw fiber comprises the following two steps:

[0034] (1) Weigh a certain amount of straw fiber into a 200mL beaker, add 50wt% NaOH solution, alkalinize for 50min; then press filter and drain to neutral, transfer to a 250mL three-neck flask, add 50mL of 30wt% NaOH dilute solution , while stirring, add 2% CS of straw fiber mass 2 , the reaction temperature was set to 40°C, and 25mL of 1wt% MgSO was added 4 , stirred, and reacted for 2 hours; finally, 0.1wt% MgSO 4 Melt solution, deionized water, 50wt% ethanol, acetone, washing the product to neutrality, drying at room temperature to obtain xanthate straw fiber;

[0035] (2) Weigh the above-mentioned certain amount of xanthate straw fiber into a 250mL three-neck flask, add deionized water, adjust the pH of the system to 11 with 10wt% NaOH solution, heat the reaction system to 40°C, and stir Add a mixed solution of 3-chloro-2-hydroxypropyltrimethylammonium chlo...

Embodiment 3

[0038] The synthetic method of xanthate cationic double-modified straw fiber comprises the following two steps:

[0039] (1) Weigh a certain amount of straw fiber into a 200mL beaker, add 50wt% NaOH solution, alkalinize for 50min; then press filter and drain to neutral, transfer to a 250mL three-neck flask, add 50mL of 35wt% NaOH dilute solution , while stirring, add 2.5% CS of straw fiber mass 2 , the reaction temperature was set to 35°C, and 25mL of 1wt% MgSO was added 4 , stirred, and reacted for 3 hours; finally with 0.1wt% MgSO 4 Melt solution, deionized water, 50wt% ethanol, acetone, washing the product to neutrality, drying at room temperature to obtain xanthate straw fiber;

[0040] (2) Weigh the above-mentioned certain amount of xanthate straw fiber into a 250mL three-necked flask, add deionized water, adjust the pH of the system to 11 with 10wt% NaOH solution, heat the reaction system to 50°C, and stir Add a mixed solution of 3-chloro-2-hydroxypropyltrimethylammon...

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Abstract

The invention relates to a xanthate cation dual-modified straw fiber printing and dyeing wastewater treatment agent which is prepared by extracting straw fiber by taking straw as a raw material, and sequentially modifying the straw fiber by using an anion esterifying agent and a cationic etherifying agent, wherein the anion esterifying agent is carbon disulfide; the cationic etherifying agent is 3-chlorine-2-hydroxypropyl trimethylammonium chloride. In addition to an excellent decoloration effect, the dual-modified straw fiber in the xanthate cation dual-modified straw fiber printing and dyeing wastewater treatment agent is hard to decompose in a water body, relatively good in water solubility resistance, hard to gelatinize even at 60 DEG C, applicable to certain acid-base environments, hard to hydrolyze and good in stability.

Description

technical field [0001] The invention relates to a xanthate cationic double-modified fiber printing and dyeing wastewater treatment agent, in particular to a printing and dyeing wastewater treatment agent based on straw fibers that is not easy to degrade and fail. Background technique [0002] Printing and dyeing is the process of reprocessing textile materials, including four processes of pretreatment, dyeing, printing and finishing. In the production process of printing and dyeing, it takes 100-200 tons of water to process 1 ton of textiles, of which 80-90% becomes waste water, so printing and dyeing waste water is one of the main industrial waste water, which has the characteristics of large water volume, large water quality fluctuations, and pollutant components. Complex and high content, high chroma, high chemical oxygen demand (COD) and high biochemical oxygen demand (BOD). In recent years, with the rapid development of my country's printing and dyeing industry, a larg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/56C02F103/30C02F101/30
CPCC02F1/56C02F2101/308C02F2103/30
Inventor 闫国伦陈亚萍
Owner JIANGYIN POLYTECHNIC COLLEGE
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