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Preparation and application method of dispersing agent

An application method and technology of dispersant, applied in the preparation and application of dispersant, can solve the problems of not paying attention to the production of silica fume, and silica fume slurry can only be prepared and used immediately, so as to achieve prolonged coagulation time and good particle suspension stability , the effect of reducing emissions

Active Publication Date: 2022-08-09
SINOHYDRO BUREAU 7 CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The technologies used only disperse the finished silica fume, and do not pay attention to the carbon dioxide produced by the production of silica fume; the dispersants only play a role in solving the agglomeration, but the dispersion system can only achieve short-term stability, and the silica fume slurry can only be prepared on-site use

Method used

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  • Preparation and application method of dispersing agent
  • Preparation and application method of dispersing agent

Examples

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Effect test

example 1

[0033] A preparation method of a dispersant for preparing a highly dispersible paste-like concrete admixture by recovering carbon dioxide, comprising the following steps:

[0034] S1. Pre-melt 72 parts of isobutenol polyoxyethylene ether, 3 parts of maleic anhydride and 1 part of hydrogen peroxide, 0.01 part of azodiisobutyl cyanide and 60 parts of deionized water into the bottom of the reaction kettle, stir evenly, and heat up to 45°C ;

[0035] S2, add 2 parts of styrene, add A material (11 parts of acrylic acid and 4 parts of methyl acrylate and 20 parts of deionized water, while stirring) and B material (0.12 part of L-ascorbic acid, 0.5 parts of thioglycolic acid and 20 parts of deionized water, while adding and stirring), A material was added dropwise for 3 hours to complete, and B material was added dropwise for 3.5 hours to complete;

[0036] S3, heat preservation reaction for 1.5 hours, add deionized water and dilute to 40% solid content to obtain dispersant-1.

[0...

example 2

[0039] A preparation method of a dispersant for preparing a highly dispersible paste-like concrete admixture by recovering carbon dioxide, comprising the following steps:

[0040] S1. Pre-melt 76 parts of isobutenol polyoxyethylene ether, 4 parts of maleic anhydride and 1.5 parts of hydrogen peroxide, 0.1 part of azodiisobutyl cyanide and 60 parts of deionized water into the bottom of the reaction kettle, stir evenly, and heat up to 45°C ;

[0041] S2, add 2 parts of styrene, add A material (11 parts of acrylic acid and 4 parts of methyl acrylate and 20 parts of deionized water, while stirring) and B material (0.12 part of L-ascorbic acid, 0.5 parts of thioglycolic acid and 20 parts of deionized water, while adding and stirring), A material was added dropwise for 3 hours to complete, and B material was added dropwise for 3.5 hours to complete;

[0042] S3, heat preservation reaction for 1.5 hours, add deionized water and dilute to 40% solid content to obtain dispersant-2.

...

Embodiment 3

[0045] A preparation method of a dispersant for preparing a highly dispersible paste-like concrete admixture by recovering carbon dioxide, comprising the following steps:

[0046] S1. Pre-melt 74 parts of isobutenol polyoxyethylene ether, 3 parts of maleic anhydride and 1.2 parts of hydrogen peroxide, 0.05 parts of azodiisobutyl cyanide and 50 parts of deionized water into the bottom of the reaction kettle, stir evenly, and heat up to 30°C ;

[0047]S2, add 0.5 part of sodium styrene sulfonate, and dropwise add material A (5 parts of acrylic acid and 1 part of methyl acrylate and 18 parts of deionized water, while adding and stirring simultaneously) and material B (0.08 part of L- Ascorbic acid, 0.3 parts of thioglycolic acid and 18 parts of deionized water, while adding and stirring), A material was added dropwise for 2.5 hours, and B material was added dropwise for 3 hours;

[0048] S3, heat preservation reaction for 1 hour, add deionized water and dilute to 40% solid conte...

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Abstract

The invention discloses a preparation and application method of a dispersing agent, carbon dioxide and silica fume discharged by a silicon iron plant are collected and form slurry to be used as a cement admixture, closed-loop treatment of waste at a production end is completed, meanwhile, the use amount of cement in building materials can be reduced, and the strength and durability of concrete or mortar can be improved.

Description

technical field [0001] The invention relates to the technical field of concrete materials, in particular to a preparation and application method of a dispersant. Background technique [0002] As human beings pay more and more attention to the environment, reducing carbon dioxide emissions has become a goal that all sectors of society strive to accomplish. From the greening point of view of the building materials industry, reducing the amount of cement used and realizing the high performance of concrete are powerful means to realize the greening of building materials. Silica fume collected from ferrosilicon plants can reduce cement consumption and improve concrete strength and durability (refer to References 1 and 2). The traditional method is to directly collect silica fume particles by dry method, and carbon dioxide is finally discharged into the atmosphere, even if it is collected, it will not produce economic benefits. At the same time, the particle size (D50=5μm) of si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/32C04B103/40
CPCC04B40/0039C04B2103/408C04B24/32C04B24/12C04B24/04C04B24/00C04B22/068C04B24/045Y02W30/91
Inventor 雷英强龚英周继中吴伟李凤玉李晓华
Owner SINOHYDRO BUREAU 7 CO LTD
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