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A kind of preparation method and application of hyperbranched polysiloxane modified fly ash

A technology of polysiloxane and polysiloxane monomer, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve the problem of low adsorption capacity of fly ash and achieve recycling Easy, wide application range, easy activation effect

Active Publication Date: 2021-02-02
四川科尔瑞环保科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adsorption capacity of pure fly ash is low
Moreover, modification methods such as acid modification, alkali modification, salt modification, and surfactant modification have limited the improvement of the adsorption capacity of fly ash.

Method used

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  • A kind of preparation method and application of hyperbranched polysiloxane modified fly ash
  • A kind of preparation method and application of hyperbranched polysiloxane modified fly ash

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0028] The present embodiment relates to a kind of preparation method of hyperbranched polysiloxane modified fly ash, and its specific steps are as follows:

[0029] Step 1, add 1 part of fly ash, 0.8 parts of distilled water and 70 parts of absolute ethanol in a three-necked flask, and disperse with ultrasonic waves for 30 minutes to obtain a mixed system;

[0030] Step 2: Stir the mixed system at 25°C-40°C, then gradually add dropwise 20-30 parts of a mixed solution of 3-aminopropyltriethoxysilane and ethanol (among them, 3-aminopropyltriethoxysilane The mass ratio of base silane to ethanol is 8:15), and react at a constant temperature of 60°C for 6-8h, after the reaction is completed, the gray powder is obtained by suction filtration;

[0031] Step 3: wash with ethanol and dilute sodium hydroxide solution to remove unreacted aminosiloxane, and obtain hyperbranched polysiloxane modified fly ash after vacuum drying.

Embodiment 2

[0033] The present embodiment relates to a kind of preparation method of hyperbranched polysiloxane modified fly ash, and its specific steps are as follows:

[0034] Step 1, add 1 part of fly ash, 1 part of distilled water and 80 parts of absolute ethanol into a three-necked flask, and disperse with ultrasonic waves for 30 minutes to obtain a mixed system;

[0035] Step 2: Stir the mixed system at 25°C-40°C, and then gradually add dropwise 30 parts of a mixed solution of 3-aminopropyltriethoxysilane and ethanol (wherein, 3-aminopropyltriethoxysilane and The mass ratio of ethanol is 20:40), react at a constant temperature at 76°C for 5-7h, and obtain a gray powder by suction filtration after the reaction is completed;

[0036] Step 3: wash with ethanol and dilute sodium hydroxide solution to remove unreacted aminosiloxane, and obtain hyperbranched polysiloxane modified fly ash after vacuum drying.

Embodiment 3

[0038] The present embodiment relates to a kind of preparation method of hyperbranched polysiloxane modified fly ash, and its specific steps are as follows:

[0039] Step 1, add 1 part of fly ash, 1.2 parts of distilled water and 75 parts of absolute ethanol into a three-necked flask, and disperse with ultrasonic waves for 30 minutes to obtain a mixed system;

[0040] Step 2, place the obtained mixed system at 25°C-40°C and stir, then gradually add dropwise 40 parts of a mixed solution of 3-aminopropyltriethoxysilane and ethanol (wherein, 3-aminopropyltriethoxysilane The mass ratio of silane to ethanol is 15:20), and react at a constant temperature of 80°C for 6-8h, after the reaction is completed, the gray powder is obtained by suction filtration;

[0041] Step 3: wash with ethanol and dilute sodium hydroxide solution to remove unreacted aminosiloxane, and obtain hyperbranched polysiloxane modified fly ash after vacuum drying.

[0042] The hyperbranched polysiloxane modified...

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Abstract

The invention provides a preparation method and application of hyperbranched polysiloxane modified fly ash; the method: add fly ash, distilled water and absolute ethanol into a three-necked flask, and disperse with ultrasonic waves to obtain a mixed system; step by step Add a mixed solution of 3-aminopropyltriethoxysilane and ethanol dropwise, react at constant temperature, and filter with suction to obtain a gray powder; wash with ethanol and dilute sodium hydroxide solution, and dry in vacuum. The present invention also relates to the application of modified fly ash; the preparation method of the present invention uses a wide range of sources of materials, simple preparation process, no violent chemical reaction in the preparation process, no release of harmful substances, no pollution to the environment, easy recovery, and simple activation treatment. It can be used repeatedly and is beneficial to industrial production; the modification method of the invention can increase the adsorption capacity of the fly ash more than 10 times, has a wide application range and has the value of popularization and application.

Description

technical field [0001] The invention belongs to the technical field of water pollution purification, and in particular relates to a preparation method and application of hyperbranched polysiloxane modified fly ash. Background technique [0002] With the continuous development of my country's dye, textile, leather, paper and other industries, the discharge of various dye wastewater is also increasing. A small amount of dyes will cause serious pollution to the environment, which will not only cause harm to aquatic organisms and humans, such as causing acute poisoning, inducing various diseases, and causing gene mutations. Moreover, dyes with a very low concentration in the water body will also show obvious colors, which will hinder the photosynthesis of aquatic organisms, thereby causing serious damage to the ecological environment. Therefore, dye wastewater must be purified before it is discharged into natural water bodies. So far, many methods such as membrane separation, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28
CPCB01J20/02B01J20/264C02F1/288C02F2101/308
Inventor 张梦萌陈碧波钱勇
Owner 四川科尔瑞环保科技有限责任公司