Preparation method for papermaking sludge based amphoteric polymer flocculent

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 , It is conducive to large-scale production and has a wide range of applications

Active Publication Date: 2015-10-28
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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  • Preparation method for papermaking sludge based amphoteric polymer flocculent
  • Preparation method for papermaking sludge based amphoteric polymer flocculent
  • Preparation method for papermaking sludge based amphoteric polymer flocculent

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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 present invention relates to a preparation method for a papermaking sludge based amphoteric polymer flocculent, comprising: dissolving a raw material of papermaking sludge directly with lye and crude extracting lignin; separating a supernatant fluid and adjusting pH of the supernatant fluid; cooling the supernatant fluid and adding an anhydrous sodium sulfite; then adding an initiator and dimethyl diallyl ammonium chloride; stirring the mixture for reaction; adding acetone and stirring the mixture; precipitating a reaction product; and vacuum filtering and drying the reaction product so as to obtain an amphoteric polymer flocculent product. When the obtained flocculant is used for treating a simulated water sample of colorant, a chroma removing rate of a dispersed yellow water sample can reach 66%, and a chroma removing rate of a methylene blue water sample can reach 35%; and combination with a conventional coagulant can significantly increase the coagulating treatment effect thereof. The preparation method in the present invention is simple to process and favorable for industrial production and application, realizing waste recycling, and the prepared flocculant has high coagulation efficiency and a wide application scope, and has a certain treatment effect on both anionic contaminants and cationic contaminants.

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 Applications(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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