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Method for preparing high efficiency concrete water reducing agent by using industrial acenaphthylene

The technology of a concrete water-reducing agent and industrial acenaphthene is applied in the field of preparation of new concrete water-reducing agents, which can solve the problem of high manufacturing cost of high-quality water-reducing agents, and achieve the effects of reducing production costs and improving flexural strength and compressive strength.

Inactive Publication Date: 2008-04-23
HANGZHOU HUAGUAN BUILDING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preparing high-efficiency concrete water reducer by using industrial acenaphthene, so as to solve the problem of high manufacturing cost of high quality water reducer in the current concrete water reducer manufacturing industry

Method used

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  • Method for preparing high efficiency concrete water reducing agent by using industrial acenaphthylene
  • Method for preparing high efficiency concrete water reducing agent by using industrial acenaphthylene
  • Method for preparing high efficiency concrete water reducing agent by using industrial acenaphthylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] (1), sulfonation reaction: drop into 154g industrial acenaphthene in a 500ml three-necked flask, and heat to 110°C; add 93g of 98% concentrated sulfuric acid dropwise, and finish adding dropwise in 1 hour, and keep warm at 80°C for 4 hours to carry out sulfonation reaction, Generate 2-sulfonic acid acenaphthylene and 1-sulfonic acid acenaphthylene. The sulfonation reaction formula is as follows:

[0013]

[0014] (2), hydrolysis reaction: then lower the temperature, add water, the acidity is 7.1%, hydrolyze for half an hour, 1-acenaphthylene sulfonate is converted into 2-acenaphthylene sulfonate. The hydrolysis reaction formula is as follows:

[0015]

[0016] (3), condensation reaction: keep temperature 70 ℃, dropwise add 37% formaldehyde 60g, dropwise finish in 1~1.5 hours, and keep warm for 2.5 hours, generate sulfonic acid acenaphthylene formaldehyde condensate. The condensation reaction formula is as follows:

[0017]

[0018] (4) Neutralization reactio...

Embodiment 2

[0022] (1), sulfonation reaction: drop into 154g industrial acenaphthene in a 500ml three-necked flask, and heat to 85°C; add 198g 98% concentrated sulfuric acid dropwise, finish dropping in 1 hour, and keep warm at 90°C for 2 hours;

[0023] (2), hydrolysis reaction: then cool down to 85°C and add water to make the acidity at 19.2%, and hydrolyze for half an hour;

[0024] (3), condensation reaction: maintain temperature at 55 ℃ and drop 110g of 37% formaldehyde, dropwise finish in 1.5 hours, and keep warm for 5 hours;

[0025] (4), neutralization reaction: finally add 30% sodium hydroxide solution 100g, then adjust the pH value to 7.4 with calcium hydroxide solution, filter with a filter screen, remove sediment, and obtain powder after dehydration, drying and pulverization of the liquid High-efficiency concrete superplasticizer.

[0026] The powdery high-efficiency concrete water reducer prepared according to the above method is dissolved in water and the specific gravity i...

Embodiment 3

[0028] (1), sulfonation reaction: drop into 154g industrial acenaphthene in a 500ml three-necked flask, heat to 80°C; add 163g98% concentrated sulfuric acid dropwise, dropwise in 1 to 1.5 hours, and keep warm at 150°C for 5 hours;

[0029] (2), hydrolysis reaction: then cool down to 130 ℃ and add water, the acidity is 13.6%, hydrolysis for 40 minutes;

[0030] (3), condensation reaction: maintain the temperature at 105 ℃ and drop 100 g of 37% formaldehyde, drop it in 2 hours, and keep it warm for 4 hours;

[0031] (4) Neutralization reaction: Finally, add potassium hydroxide solution to adjust the pH value to 8, and finally cool to obtain a liquid high-efficiency concrete superplasticizer.

[0032] According to the liquid high-efficiency concrete water reducer prepared by the above method, the specific gravity is adjusted to 1.200, and when the dosage is 1.6%, the fluidity of the cement slurry reaches 241mm. When the dosage in the mortar is 1.8%, the water reducing rate can r...

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Abstract

This invention discloses a method for preparing high efficiency water-reducing agent for concrete by utilizing the industrial acenaphthene as raw material. The raw material is subjected by the following steps: sulfonating reaction, hydrolyzation, condensation reaction, neutralization reaction to obtain this inventive product. This invention has advantages of: the water reducing rate being up to 20-25%, high antiflex strength and high compression strength, the pure sludge fluidity being up to 230-250mm, the production cost of this product being lower than those of poly-carboxylic acid series water-reducing agent or fatty compounds water-reducing agent greatly.

Description

technical field [0001] The invention relates to a preparation method of a novel concrete water reducer, in particular to a method for preparing a high-efficiency concrete water reducer by using industrial acenaphthene. Background technique [0002] Concrete water reducing agent, also known as supershrinking agent, is an anionic surfactant, which does not chemically react with cement itself, but improves the performance of concrete through the action of surfactant, and has a large water reduction and strengthening effect on concrete. role. The existing concrete water reducers mainly include lignosulfonate, naphthalene sulfonate, polycarboxylic acid and aliphatic water reducers. Due to the high price of raw materials, the manufacturing cost of these high-quality concrete water reducers is very high, which is not conducive to application and promotion. Contents of the invention [0003] The purpose of the present invention is to provide a method for preparing high-efficienc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/16C04B103/30
CPCC04B28/02C04B2111/27C04B24/22
Inventor 徐成安王茂林王彪周建陈
Owner HANGZHOU HUAGUAN BUILDING MATERIAL
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