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High-efficiency water reducing agent and preparation method thereof

A high-efficiency water-reducing agent and water-reducing agent technology, applied in the field of water-reducing agents, can solve the problems of low production efficiency and easy mildew

Inactive Publication Date: 2018-05-29
萧县沃德化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the prepared water reducing agent provided by the existing technology has the advantages of high water reducing rate and good fluidity, which can obviously improve the fluidity and workability of concrete, etc., it still has the defects of easy mildew and low production efficiency.

Method used

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  • High-efficiency water reducing agent and preparation method thereof
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A high-efficiency water reducer, which is made of the following raw materials in parts by weight: 10 parts of naphthalene oil, 4 parts of liquid caustic soda, 15 parts of acetone, 5 parts of formaldehyde, 7 parts of potassium permanganate, 4 parts of sodium nitrite, Concentrated sulfuric acid 13 parts, appropriate amount of water.

[0021] The preparation method of this water reducer comprises the following steps:

[0022] (1) Add naphthalene oil and potassium permanganate into the reaction pot, heat and melt to 130°C, add concentrated sulfuric acid dropwise under the condition of mechanical stirring speed of 100r / min, and sulfonate for 2h;

[0023] (2) Cool the product obtained in step (1) to 120° C., add water equal in quality to naphthalene oil, and stir for 30 minutes to obtain a hydrolyzate;

[0024] (3) Add the hydrolyzed solution into the reactor, lower the temperature to 80° C., adjust the pressure to 2 MPa, add formaldehyde and acetone dropwise under the condi...

Embodiment 2

[0027] A high-efficiency water reducer, which is made of the following raw materials in parts by weight: 15 parts of naphthalene oil, 9 parts of liquid caustic soda, 20 parts of acetone, 11 parts of formaldehyde, 12 parts of potassium permanganate, 9 parts of sodium nitrite, Concentrated sulfuric acid 21 parts, appropriate amount of water.

[0028] The preparation method of this water reducer comprises the following steps:

[0029] (1) Add naphthalene oil and potassium permanganate into the reaction pot, heat and melt to 140°C, add concentrated sulfuric acid dropwise under the condition of mechanical stirring speed of 200r / min, and sulfonate for 2h;

[0030] (2) Cool the product obtained in step (1) to 125° C., add water equal in quality to naphthalene oil, and stir for 30 minutes to obtain a hydrolyzate;

[0031] (3) Add the hydrolyzed solution into the reactor, lower the temperature to 90° C., adjust the pressure to 2.5 MPa, add formaldehyde and acetone dropwise under the c...

Embodiment 3

[0034] A high-efficiency water reducer, which is made of the following raw materials in parts by weight: 11 parts of naphthalene oil, 5 parts of liquid caustic soda, 16 parts of acetone, 7 parts of formaldehyde, 8 parts of potassium permanganate, 6 parts of sodium nitrite, Concentrated sulfuric acid 10 parts, appropriate amount of water.

[0035] The preparation method of this water reducer comprises the following steps:

[0036] (1) Add naphthalene oil and potassium permanganate into the reaction pot, heat and melt to 135°C, add concentrated sulfuric acid dropwise under the condition of mechanical stirring speed of 120r / min, and sulfonate for 2h;

[0037] (2) Cool the product obtained in step (1) to 120° C., add water equal in quality to naphthalene oil, and stir for 30 minutes to obtain a hydrolyzate;

[0038] (3) Add the hydrolyzed solution into the reaction kettle, lower the temperature to 85° C., adjust the pressure to 2 MPa, add formaldehyde and acetone dropwise under t...

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Abstract

The invention relates to the field of water reducing agents, in particular to a high-efficiency water reducing agent and a preparation method thereof. The water reducing agent is prepared from, by weight, 10-15 parts of naphthalene oil, 4-9 parts of caustic soda liquid, 15-20 parts of acetone, 5-11 parts of formaldehyde, 7-12 parts of potassium permanganate, 4-9 parts of sodium nitrite, 13-21 parts of concentrated sulfuric acid and an appropriate amount of water; the water reducing agent effectively makes up for the defects to a certain degree that existing water reducing agents easily mildewand are low in production efficiency.

Description

technical field [0001] The invention relates to the field of water reducers, in particular to a high-efficiency water reducer and a preparation method thereof. Background technique [0002] Water reducer is a concrete admixture that can reduce the amount of mixing water while maintaining the slump of concrete. Most of them are anionic surfactants, such as lignosulfonate, naphthalenesulfonate formaldehyde polymer, etc. After being added to the concrete mixture, it can disperse the cement particles, improve its workability, reduce the unit water consumption, improve the fluidity of the concrete mixture; or reduce the unit cement consumption and save cement. [0003] In the patent application CN104119021B published in China, a high-efficiency water reducer is obtained by mixing the following raw materials in parts by weight: β-naphthalene sulfonate formaldehyde condensate 50-60, polyethylene glycol monomethyl ether methyl Acrylate 20-30, calcium lignosulfonate 15-25, ethylene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G16/02C04B24/22C04B103/30
Inventor 马丽涛崔岩王硕
Owner 萧县沃德化工科技有限公司
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