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A kind of preparation method of papermaking sludge-based amphoteric polymer flocculant

A technology of amphoteric polymers and papermaking sludge, applied in sludge treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve problems such as poor flocculation effect and limited application range of flocculants, and reduce emissions , Conducive to large-scale production, the effect of simple process

Active Publication Date: 2018-01-02
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent document CN102583684A discloses a practical application process of preparing flocculation by using papermaking sludge. Due to the limited application range of this flocculant, the flocculation effect is relatively poor. If a better flocculation effect is achieved, other substances need to be added for compounding
After retrieval, there is no report on the related technology of synthesizing amphoteric polymer flocculant with papermaking sludge as raw material

Method used

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  • A kind of preparation method of papermaking sludge-based amphoteric polymer flocculant
  • A kind of preparation method of papermaking sludge-based amphoteric polymer flocculant
  • A kind of preparation method of papermaking sludge-based amphoteric polymer flocculant

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Embodiment 1

[0036] Embodiment 1. Preparation of papermaking sludge-based amphoteric polymer flocculant (LBF) with different sodium sulfite additions

[0037] (1) Take 2.0g of papermaking sludge and add it to 50ml of deionized water, add dropwise 1mol / L NaOH solution under stirring, adjust the pH to 11.0, stir for 10min until the mixture is uniform, then centrifuge at 8000rpm for 15min, and take the supernatant , adjust the pH to 7.5;

[0038](2) Heat the supernatant after pH adjustment to 90°C, stir for 5min, add anhydrous sodium sulfite 0.5g, 1.5g, 2.5g, 3.5g respectively, and continue stirring for 2h; lower the reaction temperature to 60°C in a water bath, Add 50 mg of disodium edetate, and the reaction time is 10 min; add 6 ml of dimethyl diallyl ammonium chloride, continue to stir and react for 2 h, and the reaction temperature is 60°C;

[0039] (3) After the reaction, cool to room temperature, add 500ml of acetone, stir to precipitate the reaction product, vacuum filter, take the fi...

Embodiment 2

[0040] Embodiment 2. Preparation of papermaking sludge-based amphoteric polymer flocculant (LBF) with different additions of dimethyl diallyl ammonium chloride

[0041] (1) Take 2.0g of papermaking sludge and add it to 50ml of deionized water, add dropwise 1mol / L NaOH solution under stirring, adjust the pH to 11.0, stir for 10min until the mixture is uniform, then centrifuge at 8000rpm for 15min, and take the supernatant , adjust the pH to 7.5;

[0042] (2) Heat the supernatant after pH adjustment to 90°C, stir for 5 minutes, add 2.5 g of anhydrous sodium sulfite, and continue stirring for 2 hours; lower the reaction temperature to 60°C in a water bath, add 50 mg of disodium edetate, The reaction time is 10 minutes; add 4ml, 6ml, 8ml, 10ml of dimethyl diallyl ammonium chloride respectively, continue to stir and react for 2h, and the reaction temperature is 60°C;

[0043] (3) After the reaction is finished, cool to room temperature, add 500ml of acetone, stir to precipitate th...

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Abstract

The invention relates to a preparation method of a paper-making sludge-based amphoteric polymer flocculant, which comprises directly dissolving the raw material of the paper-making sludge with lye to extract lignin, separating the supernatant, adjusting the pH of the supernatant, cooling down, and adding water sodium sulfite, then add initiator and dimethyl diallyl ammonium chloride, stir to react, add acetone to the mixture and stir to precipitate the reaction product, vacuum filter and dry to obtain the amphoteric polymer flocculant product. When the obtained flocculant is used to treat simulated dye water samples, the chromaticity removal rate of dispersed yellow water samples can reach 66%, and the chromaticity of methylene blue water samples can reach 35%. Compounding traditional coagulants can significantly increase its coagulation treatment Effect. The invention has a simple process, is beneficial to industrialized production and application, not only realizes the reuse of waste, but also has high flocculation efficiency and wide application range, and has a certain treatment effect on both anionic and cationic pollutants.

Description

technical field [0001] The invention relates to a preparation method of a paper-making sludge-based amphoteric polymer flocculant, which is applied to various water treatment or sewage treatment, and belongs to the technical field of waste resource utilization and water treatment flocculants. Background technique [0002] With the development of our country's economy and the rapid increase of population, the water resources that human beings depend on are increasingly scarce, and the universal water resource crisis has become an important factor restricting the sustainable development of economy and society. In today's water treatment industry, coagulants are widely used in engineering technology fields such as water industry, water pollution control and wastewater purification and reuse. Coagulant is a high-tech high-value-added product, which largely determines the innovation of water treatment technology, the simplification of process flow, the cost of water treatment and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F289/00C08F226/02C02F1/56C02F11/00C02F103/28
Inventor 高宝玉李瑞华孙建璋卜凡王芳岳钦艳王燕
Owner SHANDONG UNIV
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