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Sulfonation process for producing dye dispersant and concrete water reducing agent

A technology of concrete water reducer and dye dispersant, applied in the direction of organic chemistry, organic chemical methods, chemical instruments and methods, etc., can solve problems such as loss and environmental impact, and achieve the effect of improving production efficiency and shortening production process

Inactive Publication Date: 2010-12-01
浙江五龙新材股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method requires a large amount of inert solvent. Although it can be recycled and reused, it still has a certain loss and has a certain impact on the environment.

Method used

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  • Sulfonation process for producing dye dispersant and concrete water reducing agent
  • Sulfonation process for producing dye dispersant and concrete water reducing agent
  • Sulfonation process for producing dye dispersant and concrete water reducing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Take by weighing methylnaphthalene 142 grams and put into the 500 milliliters of four-neck flasks that agitator, thermometer, condenser tube are housed, start stirring, heating furnace heating. When temperature rises to 110 ℃, start to drop 98 grams of 98% sulfuric acid. After the dropwise addition was completed, when the temperature was raised to 150°C and the vacuum was started to reach 0.06Mpa, and the temperature was kept, water and oil flowed out. After 3 hours of incubation, the reaction ended. Stop the vacuum, cool to 120°C, add water and hydrolyze to measure the acidity. Collect and separate the effluent water and oil layers. The next sulfonation of the oil layer can be reused. When the sulfonated material was cooled to 80°C, 60 grams of 37% formaldehyde was added dropwise, and the temperature was controlled not to exceed 90°C. After dropping, heat up to 100-105°C for condensation reaction. Leave on for 6 hours to finish. Add 32% liquid caustic soda to neu...

Embodiment 2

[0015] Take by weighing 128 grams of naphthalene and put into the 500 milliliter four-neck flask that stirrer, thermometer, condenser tube are housed, start stirring, heating furnace heating. When temperature rises to 110 ℃, start to drop 90 grams of 98% sulfuric acid. After the dropwise addition was completed, when the temperature was raised to 160°C and the vacuum was started to reach 0.06Mpa, and the temperature was kept, water and oil flowed out. After 3 hours of incubation, the reaction ended. Stop the vacuum, cool to 120°C, add water and hydrolyze to measure the acidity. Collect and separate the effluent water and oil layers. The next sulfonation of the oil layer can be reused. When the sulfonated material was cooled to 80°C, 60 grams of 37% formaldehyde was added dropwise, and the temperature was controlled not to exceed 90°C. After dropping, heat up to 100-105°C for condensation reaction. Leave on for 6 hours to finish. Add 32% liquid caustic soda to neutralize. ...

Embodiment 3

[0017] Weigh 166 grams of fluorene and put it into a 500-milliliter four-neck flask equipped with a stirrer, a thermometer, and a condenser tube, start stirring, and heat in a heating furnace. When temperature rises to 110 ℃, start to drop 90 grams of 98% sulfuric acid. After the dropwise addition was completed, when the temperature was raised to 140°C and the vacuum was started to reach 0.085Mpa, and kept warm, water and oil flowed out. After 3 hours of incubation, the reaction ended. Stop the vacuum, cool to 120°C, add water and hydrolyze to measure the acidity. Collect and separate the effluent water and oil layers. The next sulfonation of the oil layer can be reused. When the sulfonated material was cooled to 80°C, 60 grams of 37% formaldehyde was added dropwise, and the temperature was controlled not to exceed 90°C. After dropping, heat up to 100-105°C for condensation reaction. Leave on for 6 hours to finish. Add 32% liquid caustic soda to neutralize. The neutrali...

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Abstract

The invention relates to a method for producing a dye dispersant and a concrete water-reducing agent by using aromatic hydrocarbon and / or heterocyclic compounds. A sulfonation process for producing the dye dispersant and the concrete water reducing agent comprises the following steps: mixing the aromatic hydrocarbon and / or heterocyclic compounds with concentrated sulfuric acid to conduct a sulfonation reaction; vasuumizing in a process of the sulfonation reaction to remove water generated by the reaction; and carrying out a condensation reaction on sulfonation materials and formaldehyde, and then carrying out a neutralization reaction to synthesizing the dye dispersant and the concrete water-reducing agent. In the sulfonation process for producing the dye dispersant and the concrete water reducing agent of the invention, sulfonation is carried out under a vacuum state, and the water generated in the sulfonation process is discharged out from a system so as to carry out the complete sulfonation reaction. The invention has the advantages that excess sulfuric acid dose not need to be added, the usage ratio of basic sulfuric acid to aromatic compounds and / or heterocyclic compounds is 1:1-0.7:1, and only sodium hydroxide is added for neutralization. The dispersant and the water-reducing agent contain sodium sulfate being less than 7%, hardly contain calcium and magnesium ions, and reach requirements in various performance indexes.

Description

technical field [0001] The invention relates to a method for producing a dye dispersant and a concrete water reducer for aromatic hydrocarbons and / or heterocyclic compounds. Background technique [0002] Domestically, since 1973, aromatic compounds and (or) heterocyclic compounds have been used to manufacture dye dispersants and concrete water reducers. The process is to sulfonate, hydrolyze, condense, neutralize and Blending, filtering, drying and other processes to obtain dye dispersant and concrete water reducer. Among them, the sulfonation reaction is the reaction of aromatic and (or) heterocyclic compounds and concentrated sulfuric acid to generate sulfonated compounds and water. According to the sulfonation mechanism, when the sulfonated water reaches the H value, the sulfonation reaction stops. In order to make the sulfonation sufficient, excessive sulfuric acid is often required for sulfonation, and at the same time, more sulfur dioxide waste gas is produced during ...

Claims

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Application Information

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IPC IPC(8): C07B45/00C04B24/16C04B103/30
Inventor 杨慧芬张勇丁继英邱学妹王家丰宋永良
Owner 浙江五龙新材股份有限公司
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