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A kind of preparation method of sodium alginate-polymethacryloyloxyethyltrimethylammonium chloride organic flocculant

A technology of polymethacryloyloxyethyltrimethylammonium chloride and methacryloyloxyethyltrimethylammonium chloride, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/ Sludge/sewage treatment and other directions can solve the problems of complex modification steps, low molecular weight, poor water solubility, etc., and achieve good flocculation effect, high charge density, and obvious effect.

Active Publication Date: 2021-09-21
SHANDONG UNIV
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Problems solved by technology

The chemically modified sodium alginate introduces nitrogen and sulfur elements, which greatly improves the adsorption capacity and removal rate of heavy metal ions in sewage by sodium alginate flocculant, but because of its low molecular weight, the amount of use is too large and the cost is high , the modification steps are complicated; although some modified flocculants have large molecular weight and strong flocculation ability, their water solubility is not good, and their application range is small

Method used

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  • A kind of preparation method of sodium alginate-polymethacryloyloxyethyltrimethylammonium chloride organic flocculant
  • A kind of preparation method of sodium alginate-polymethacryloyloxyethyltrimethylammonium chloride organic flocculant
  • A kind of preparation method of sodium alginate-polymethacryloyloxyethyltrimethylammonium chloride organic flocculant

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preparation example Construction

[0028] The preparation of simulated surface water in the embodiment:

[0029] (1) Weigh 1.0 g of humic acid and 0.4 g of sodium hydroxide, dissolve with about 800 mL of deionized water and stir for 1 hour, and finally set the volume to 1 L to obtain humic acid stock solution;

[0030] (2) Weigh 5 g of kaolin, add 1 L of deionized water to dissolve and stir for 1 h, pour into a graduated cylinder to settle for 20 min, take 800 mL of the upper layer, and obtain a kaolin stock solution;

[0031] (3) Prepare water samples with tap water and humic acid stock solution at a volume ratio of 100:1, and adjust the turbidity to 14.5-15.5 with kaolin stock solution.

[0032] The water quality index of the simulated surface water is shown in Table 1 below, and the final treatment effect is represented by UV 254 The removal rate (%) is indicated.

[0033] Table 1 Water quality indicators of simulated water samples

[0034] pH UV 254

Embodiment 1

[0036] A kind of preparation method of sodium alginate-polymethacryloyloxyethyltrimethylammonium chloride organic flocculant, the steps are as follows:

[0037] (1) Take 1g of sodium alginate, add 100mL of deionized water, heat and dissolve to obtain sodium alginate solution;

[0038] (2) Heat the sodium alginate solution to 70°C, continuously feed high-flow nitrogen gas, and continue to stir for 30 minutes to make the sodium alginate solution full of bubbles to obtain a bubble-filled sodium alginate solution. The flow rate of high-flow nitrogen gas is: 200mL / min;

[0039] (3) Add 0.5g potassium peroxodisulfate to the sodium alginate solution full of bubbles to activate and react for 20min, then add 75wt% methacryloxyethyl trimethyl chloride dropwise in batches for three times Ammonium solution 20mL, continue to react at 70°C for 1h; the whole step is carried out under the protection of nitrogen;

[0040] (4) After the reaction, cool to room temperature, purify with acetone ...

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Abstract

The invention relates to a preparation method of sodium alginate-polymethacryloyloxyethyltrimethylammonium chloride organic flocculant. The invention uses an activator to activate sodium alginate, and the sodium alginate molecule contains a large number of hydroxyl groups (‑OH), after activation, a large amount of ‑O· will be produced, which will be polymerized with methacryloyloxyethyltrimethylammonium chloride to form an organic flocculant with large molecular weight, high charge density and good water solubility, with a charge density as high as 4600ueq / L, the organic flocculant of the present invention not only greatly improves the charge density, but also has a substantial increase in molecular weight, so it improves the adsorption neutralization effect in sewage treatment, and can provide adsorption bridging and net capture The sweeping effect has a good flocculation effect.

Description

technical field [0001] The invention relates to a preparation method of a sodium alginate-polymethacryloyloxyethyltrimethylammonium chloride organic flocculant, belonging to the technical field of environmental chemical water treatment. Background technique [0002] The total amount of water resources in my country is abundant, but the per capita occupancy is insufficient. With the rapid development of industry and agriculture, a large amount of toxic and harmful substances are discharged arbitrarily, and the problem of water pollution is serious, which has exacerbated the current situation of water shortage in our country. Therefore, adopting appropriate methods to treat and reuse water and wastewater has important practical significance and application value for reducing water pollution and changing the current situation of water shortage. [0003] Commonly used wastewater treatment methods include chemical precipitation, ion exchange, membrane separation, adsorption, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F251/00C02F1/52C02F1/56
CPCC02F1/5263C02F1/56
Inventor 高宝玉刘彩玉郭康鹰岳钦艳
Owner SHANDONG UNIV
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