A kind of inorganic-organic covalent hybrid flocculant and preparation method thereof

A flocculant and organic technology, applied in the field of inorganic-organic covalent hybrid flocculants and their preparation, can solve the problems of the flocculant's electrical neutralization ability and poor stability, and achieve good flocculation effect, high molecular weight and fast precipitation Effect

Inactive Publication Date: 2016-09-07
HAINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the existing flocculants have poor electrical neutralization ability and stability

Method used

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  • A kind of inorganic-organic covalent hybrid flocculant and preparation method thereof
  • A kind of inorganic-organic covalent hybrid flocculant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1 Preparation of inorganic-organic covalent hybrid flocculant

[0030] In the first step, mix 36mL of absolute ethanol with 4mL of water, adjust the pH to 4 with 5% hydrochloric acid, add 2mL of KH-570 (that is, γ-methacryloxypropyltrimethoxysilane) to the mixed solution, Hydrolysis for 12h. Take 3.6mL from the above solution and mix it with 100mL20g / L complete polyaluminum chloride solution, place it in a three-necked flask, and then adjust the pH to 10 with sodium hydroxide solution;

[0031] In the second step, add 0.6 g of acrylamide monomer to the above solution, stir evenly, pass high-purity nitrogen into the solution to remove oxygen, and slowly add 3.6 mL of ammonium persulfate solution with a concentration of 1 g / L dropwise under nitrogen protection. Stir evenly and seal;

[0032] The third step is to react the above-mentioned sealing solution at 65°C for 3 hours, and the product is precipitated with ethanol, filtered with filter paper, washed with ac...

Embodiment 2

[0033] Example 2 Preparation of inorganic-organic covalent hybrid flocculant

[0034] In the first step, mix 36 mL of absolute ethanol with 4 mL of water, adjust the pH to 4 with 5% hydrochloric acid, add 2 mL of KH-570 to the mixed solution, and hydrolyze for 12 hours. Take 3.6mL from the above solution and mix it with 100mL20g / L complete polyaluminum chloride solution, place it in a three-necked flask, and then adjust the pH to 10 with sodium hydroxide solution;

[0035] In the second step, add 0.4 g of acrylamide monomer to the above solution, stir evenly, pass high-purity nitrogen into the solution to remove oxygen, and slowly add 2 mL of ammonium persulfate solution with a concentration of 1 g / L dropwise under the protection of nitrogen, and stir Uniform, sealed;

[0036] The third step is to react the above sealing solution at 70°C for 2 hours, and the product is precipitated with ethanol, filtered with filter paper, washed with acetone, dried and ground to obtain an in...

Embodiment 3

[0037] Example 3 Preparation of inorganic-organic covalent hybrid flocculant

[0038] In the first step, mix 36 mL of absolute ethanol with 4 mL of water, adjust the pH to 4 with 5% hydrochloric acid, add 2 mL of KH-570 to the mixed solution, and hydrolyze for 12 hours. Take 3.6mL from the above solution and mix it with 100mL20g / L complete polyaluminum chloride solution, place it in a three-necked flask, and then adjust the pH to 10 with sodium hydroxide solution;

[0039] In the second step, add 0.8 g of acrylamide monomer to the above solution, stir evenly, pass high-purity nitrogen into the solution to remove oxygen, and slowly add 5.6 mL of ammonium persulfate solution with a concentration of 1 g / L dropwise under nitrogen protection. Stir evenly and seal;

[0040] The third step is to react the above sealing solution at 50°C for 4 hours, and the product is precipitated with ethanol, filtered with filter paper, washed with acetone, dried and ground to obtain an inorganic-o...

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Abstract

The present invention belongs to the field of polymer flocculant for water treatment, and particularly relates to an inorganic-organic covalent hybrid flocculant and a preparation method thereof. The invention mainly solves the technical problem of weak charge neutralization capability and stability. The invention discloses an inorganic-organic covalent hybrid flocculant, which comprises the following raw materials by weight: 60%-75% of inorganic particles, and a monomer in the weight ratio to inorganic particles of 20%-40%, an initiator in the weight ratio to monomer of 0.5%-0.7%, and a modifier in the weight ratio to inorganic particles of 9%. The invention also discloses the preparation method of the flocculant. The flocculant provided by the invention has the advantages of good flocculation effect, complete precipitation, few aids for synthesis, low usage amount, little residues in the product, high product purity and product safety, and is applicable to drinking water treatment.

Description

technical field [0001] The invention belongs to the field of polymer flocculants for water treatment, and in particular relates to an inorganic-organic covalent hybrid flocculant and a preparation method thereof. Background technique [0002] At present, water treatment flocculants mainly include inorganic flocculants and organic polymer flocculants. Inorganic flocculants have the characteristics of strong electrical neutralization ability, large floc density, fast growth of flocs, and low cost of use. Organic polymer flocculants have the advantages of less dosage, strong adsorption and bridging ability, fast flocculation speed, and stable products. , but its raw materials are expensive and the cost is high. Usually, the organic and inorganic flocculants are mechanically mixed to make a composite flocculant, which combines the high charge density of the inorganic flocculant with the bridging effect of the organic polymer flocculant to give full play to the flocculation adva...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52
Inventor 冯欣蕊
Owner HAINAN UNIVERSITY
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