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Method for producing polycyclic aromatic hydrocarbon sulfonate polymer concrete water reducing agent

The technology of polycyclic aromatic hydrocarbon sulfonate and concrete water reducing agent is applied in the field of production technology of chemical products, and can solve the problems of affecting the reaction yield, product purity, high production cost, easy coking of anthracene, etc., so as to improve the utilization rate. Value, easy process control, the effect of improving product yield

Inactive Publication Date: 2007-08-01
JIANGDU RUNHUA CHEM
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AI Technical Summary

Problems solved by technology

[0002] The production process steps of the current concrete water reducer are sulfonation, hydrolysis, condensation, and neutralization, but the sulfonation raw materials used are anthracene oil and concentrated sulfuric acid. Since a large amount of anthracene oil is anthracene, the sulfonation temperature condition is 130°C. The production process not only requires a large amount of heat energy consumption, but also, due to the high temperature reaction, anthracene is prone to coking, which affects the reaction yield and the purity of the product
In addition, the high price of anthracene oil directly leads to the high production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0009] 1. Preparation:

[0010] Prepare 1000kg of anthracene slag, 1400-1800kg of 98% concentrated sulfuric acid, 400-500kg of water, 200-350kg of formaldehyde, and liquid caustic soda.

[0011] Second, the process steps:

[0012] 1. Sulfonation

[0013] Put the anthracene slag into the sulfonation reaction kettle, add 98% concentrated sulfuric acid, react at 70-120°C for 2-3 hours, then cool naturally to 100±10°C.

[0014] 2. Hydrolysis

[0015] Add cold water into the above reaction kettle and stir evenly.

[0016] 3. Condensation

[0017] Add formaldehyde into the reaction kettle, after condensation reaction for 3 to 5 hours, add water to dilute, and press into each reaction kettle.

[0018] 4. Neutralization

[0019] Add liquid caustic soda into the neutralization reactor to neutralize the reactants, and adjust the pH value to 7-10. Made of polycyclic aromatic hydrocarbon sulfonate formaldehyde polymer, that is, concrete water reducing agent.

[0020] 5. Drying

...

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Abstract

The invention discloses a manufacturing method of polycyclic aromatic sulfonate polymer concrete dehydragent in the chemical manufacturing technique, which is characterized by the following: adopting anthracene slag and condensed sulfuric acid as raw material; sulfonating under 70-120 deg.c; hydrolyzing; condensing; neutralizing; improving receiving rate effectively.

Description

technical field [0001] The invention relates to a production process of chemical products, in particular to a production process of concrete water reducer. Background technique [0002] The production process steps of the current concrete water reducer are sulfonation, hydrolysis, condensation, and neutralization, but the sulfonation raw materials used are anthracene oil and concentrated sulfuric acid. Since a large amount of anthracene oil is anthracene, the sulfonation temperature condition is 130°C. The production process not only requires a large amount of heat energy consumption, but also, due to the high-temperature reaction, anthracene is prone to coking, which affects the reaction yield and product purity. In addition, the high price of anthracene oil directly leads to the high production cost. [0003] Anthracene slag is the residue of refined anthracene purified from crude anthracene, which is currently only used as a raw material for firing carbon black or as a f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/20C04B103/30
CPCC04B2103/302C04B24/22
Inventor 顾本庭朱莲华
Owner JIANGDU RUNHUA CHEM
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