Synthesis and application of copolymer of 1% of DVB crosslinking skeleton of chloromethylate polystyrene resin and 1,4-naphthoquinone

A technology of polystyrene resin and naphthoquinone copolymer is applied in the synthesis and application field of chloromethylated polystyrene resin 1% DVB cross-linked skeleton and 1,4-naphthoquinone copolymer, which can solve secondary pollution , easy loss and other problems, to achieve the effect of less impurity ion pollution, short reaction time and lower processing cost

Inactive Publication Date: 2013-05-15
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved in the present invention is to provide a kind of synthesis and application of chloromethylated polystyrene resin 1% DVB cross-linked backbone and 1,4-naphthoquinone copolymer, which uses water-soluble 1,4-naphthoquinone as The copolymerization reaction between the monomer and the polymer occurs, and the formed copolymer is embedded with cellulose acetate to form immobilized pellets, which solves the technical problem that water-soluble quinone monomers are easy to lose in water and cause secondary pollution, and will It is used in the microbial denitrification process and the microbial degradation process of azo dyes

Method used

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  • Synthesis and application of copolymer of 1% of DVB crosslinking skeleton of chloromethylate polystyrene resin and 1,4-naphthoquinone
  • Synthesis and application of copolymer of 1% of DVB crosslinking skeleton of chloromethylate polystyrene resin and 1,4-naphthoquinone
  • Synthesis and application of copolymer of 1% of DVB crosslinking skeleton of chloromethylate polystyrene resin and 1,4-naphthoquinone

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Using 1,4-naphthoquinone monomer and 1% DVB cross-linked backbone of chloromethylated polystyrene resin as starting materials, the copolymer was synthesized and purified according to the following steps:

[0030]Step A. Weigh 0.036mol of chloromethylated polystyrene resin 1% DVB cross-linked skeleton, add it into a 100mL four-necked round-bottomed grinding flask equipped with a stirrer, condenser, and thermometer, and then add 20mL of Dichloroethane, set the temperature of the thermostatic heating agitator at 50°C, start heating and stirring for 10 minutes, so that the 1% DVB cross-linked skeleton of chloromethylated polystyrene resin swells into a spherical shape, and then raise the temperature of the above system to 78°C, Add 0.1g catalyst zinc chloride;

[0031] Step B. Weigh 0.036mol of 1,4-naphthoquinone and dissolve it with 15mL of dichloroethane. After 10 minutes, use a dropper to drop it into the system of step A three times, react at 78°C for 3h, and then cool ...

Embodiment 2~ Embodiment 6

[0061] With reference to the steps of Example 1, the synthesis and purification reactions of the copolymer were carried out according to the parameters in the following table. Other reaction parameters are adjusted accordingly by those skilled in the art.

[0062] Table 1 Reaction parameters and speed-up effects of Embodiment 1 to Embodiment 6

[0063]

[0064] In each embodiment, the degradation of azo dyes and the degradation of nitrate nitrogen have been subjected to cycle tests, and the results show that as the number of cycles increases, the decolorization rate of azo dyes and the removal rate of nitrate nitrogen do not change significantly.

Embodiment 7

[0066] The difference from Example 1 is that in this example, the experimental reaction temperatures are set at 70°C, 73°C, 78°C, 80°C, and 83°C, respectively. In the present invention, chloromethylated polystyrene resin 1% DVB cross-linked skeleton reacts with 1,4-naphthoquinone to generate hydrogen chloride gas, hydrogen chloride is insoluble in organic reaction system, hydrogen chloride gas is collected and dissolved in 100mL distilled water, and measured by The pH value of the distilled water can calculate the concentration of hydrogen ions produced when the reaction system reaches a stable state, and then reflect the degree of substitution and the relationship between the reaction temperature and the degree of substitution.

[0067] The results show that: when the reaction temperature is 70°C, the pH value of the system does not change after the reaction is carried out for 1 hour, that is to say, the chloromethylated polystyrene resin 1% DVB cross-linked skeleton and 1,4-n...

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Abstract

The invention discloses synthesis and an application of copolymer of 1% of DVB crosslinking skeleton of chloromethylate polystyrene resin and 1,4-naphthoquinone. A 1,4-naphthoquinone substituted chloromethylate polystyrene copolymer is synthetized from 1% of DVB crosslinking chloromethylate polystyrene resin and 1,4-naphthoquinone as initial materials. The synthesis is low in reaction temperature, and short in reaction time (2-4 hours); the degree of substitution can be up to over 52%; the improvement of catalytic action of the polymer is facilitated; and the copolymer disclosed by the invention is applied to the degradation of waste water containing nitrogen. The results show that the microbial denitrification process and the microbial degradation azo-dye process are accelerated.

Description

technical field [0001] The invention relates to a method for synthesizing and purifying a copolymer and its application in the microbial denitrification process and the microbial degradation process of azo dyes, in particular to chloromethylated polystyrene resin 1% DVB cross-linked skeleton and 1,4 -Synthesis and application of naphthoquinone copolymer. Background technique [0002] With the rapid development of social economy, the annual discharge of azo dye wastewater and nitrate wastewater into the water environment is increasing significantly. Because of its serious harm to the ecological environment and human health, it has become a topic of widespread concern. At present, the treatment methods for the above-mentioned wastewater at home and abroad can be divided into two categories: physical and chemical methods and biological methods. Compared with the physical and chemical method, the biological method has the characteristics of simple process, low cost, and easy p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G61/10B01J31/06C02F3/28
Inventor 郭建博陈延明廉静牛春梅李绍英张华雨许晴杨景亮岳琳
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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