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Fly ash chelating improver and preparation method thereof

A technology of improving agent and fly ash, applied in the direction of protection device against harmful chemical agents, etc., can solve the problems of weak chelating ability, poor thermal stability, complicated preparation method, etc. simple effect

Inactive Publication Date: 2018-10-26
安徽安江环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a kind of fly ash chelation improving agent and preparation method thereof, by dimethyl dithiocarbamate, sodium sulfide, sodium phosphate, sodium hydroxide, acrylamide, pure water with certain The weight ratio is mixed to obtain a chelating agent to solve the problems of weak chelating ability, poor thermal stability and complicated preparation methods in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Zinc dimethyl dithiocarbamate: 60 parts;

[0025] Sodium sulfide: 20 parts;

[0026] Sodium phosphate: 15 parts;

[0027] Sodium hydroxide: 100 parts;

[0028] Acrylamide: 50 parts;

[0029] Pure water: 90 parts.

[0030] Step S1: Put 60 parts of dimethyl dithiocarbamate, 20 parts of sodium sulfide, 15 parts of sodium phosphate, and 90 parts of pure water into the reactor at room temperature and stir for 5 minutes;

[0031] Step S2: Add 50 parts of acrylamide into step S1, and stir at room temperature for 20 minutes;

[0032] Step S3: Add 100 parts of sodium hydroxide into step S2, and stir for 5 minutes to obtain a fly ash chelation modifier for later use. The amount of the fly ash chelating modifier used is 2.3% of the total amount of fly ash.

Embodiment 2

[0034] Zinc dimethyl dithiocarbamate: 80 parts;

[0035] Sodium sulfide: 25 parts;

[0036] Sodium phosphate: 20 parts;

[0037] Sodium hydroxide: 150 parts;

[0038] Acrylamide: 55 parts;

[0039] Pure water: 110 parts.

[0040] Step S1: Put 80 parts of dimethyl dithiocarbamate, 25 parts of sodium sulfide, 20 parts of sodium phosphate, and 110 parts of pure water into the reactor at room temperature and stir for 8 minutes;

[0041] Step S2: Add 55 parts of acrylamide into step S1, and stir at room temperature for 20 minutes;

[0042] Step S3: Add 150 parts of sodium hydroxide into step S2, and stir for 7 minutes to obtain a fly ash chelation modifier for later use. When in use, the usage amount of the fly ash chelating modifier is 2.1% of the total amount of fly ash.

Embodiment 3

[0044] Zinc dimethyl dithiocarbamate: 90 parts;

[0045] Sodium sulfide: 30 parts;

[0046] Sodium phosphate: 30 parts;

[0047] Sodium hydroxide: 200 parts;

[0048] Acrylamide: 60 parts;

[0049] Pure water: 150 parts.

[0050] Step S1: Put 90 parts of dimethyl dithiocarbamate, 30 parts of sodium sulfide, 30 parts of sodium phosphate, and 150 parts of pure water into the reactor at room temperature and stir for 10 minutes;

[0051] Step S2: Add 60 parts of acrylamide into step S1, and stir at room temperature for 30 minutes;

[0052] Step S3: Add 200 parts of sodium hydroxide into step S2, and stir for 8 minutes to obtain a fly ash chelation modifier for later use. When in use, the usage amount of the fly ash chelating modifier is 1.9% of the total amount of fly ash.

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PUM

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Abstract

The invention discloses a fly ash chelating improver and a preparation method thereof, and relates to the technical field of chelating agent preparation. The fly ash chelating improver is prepared from the following components in parts by weight: 60 to 90 parts of dimethyl dithiocarbanate, 20 to 30 parts of sodium sulphide, 15 to 30 parts of sodium phosphate, 100 to 200 parts of sodium hydroxide,50 to 60 parts of acrylamide, and 90 to 150 parts of pure water. The preparation method comprises the steps of S1, placing the 60 to 90 parts of dimethyl dithiocarbanate, the 20 to 30 parts of sodiumsulphide, the 15 to 30 parts of sodium phosphate and the 90 to 150 parts of pure water into a reactor, and stirring for 5 to 10 minutes at normal temperature; S2, adding the 50 to 60 parts of acrylamide into the step S1, and stirring for 20 to 30 minutes at normal temperature; and S3, adding the 100 to 200 parts of sodium hydroxide into the step S2, and stirring for 5 to 8 minutes to obtain the fly ash chelating improver. The fly ash chelating improver prepared through the above components and the steps has high chelating efficiency, more chelating species and fast rate.

Description

technical field [0001] The invention belongs to the technical field of chelating agent preparation, in particular to a fly ash chelating modifier and a preparation method thereof. Background technique [0002] Incineration is to oxidize organic waste into inert gaseous substances and inorganic non-combustible substances under the conditions of high temperature and sufficient oxygen supply, forming stable and easy-to-handle solid residues, and the heat energy released during the incineration process can be recycled and used to generate electricity, etc., but Incineration produces a large amount of fly ash containing heavy metals. Fly ash, also known as fly ash or soot, is a kind of environmentally hazardous waste. In severe cases, it will cause air pollution. If it enters the water, it will silt up the river, and the chemical substances contained in it will cause harm to the human body. The reagents used in the world for heavy metal pollution in fly ash of waste incineration...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62D3/33A62D101/08A62D101/43
CPCA62D3/33A62D2101/08A62D2101/43
Inventor 张期凯
Owner 安徽安江环保科技有限公司
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