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
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[0012] Example 1
[0013] Weigh 142 grams of methyl naphthalene into a 500 ml four-necked flask equipped with a stirrer, a thermometer, and a condenser, start stirring, and heat in a heating furnace. When the temperature reached 110°C, 98 grams of 98% sulfuric acid was added dropwise. After the dripping is completed, when the temperature is raised to 150°C and the vacuum starts to reach 0.06Mpa., and keep warm, water and oil will flow out. After 3 hours of holding, the reaction is over. Stop the vacuum, cool to 120°C, add water to hydrolyze the acidity. Collect and separate the outflow water layer and oil layer. The oil layer can be reused next time after sulfonation. When the sulfonated material is cooled to 80°C, 60 grams of 37% formaldehyde is added dropwise, and the temperature is controlled not to exceed 90°C. After dropping, the temperature is raised to 100-105°C for condensation reaction. Keep it at the end of 6 hours. Add 32% liquid caustic soda to neutralize. The...
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[0014] Example 2
[0015] Weigh 128 grams of naphthalene into a 500 ml four-necked flask equipped with a stirrer, thermometer, and condenser, start stirring, and heat in a heating furnace. When the temperature reached 110°C, 90 grams of 98% sulfuric acid was added dropwise. After the dripping is completed, when the temperature is raised to 160°C and the vacuum starts to reach 0.06Mpa., and keep warm, water and oil flow out. After 3 hours of holding, the reaction is over. Stop the vacuum, cool to 120°C, add water to hydrolyze the acidity. Collect and separate the outflow water layer and oil layer. The oil layer can be reused next time after sulfonation. When the sulfonated material is cooled to 80°C, 60 grams of 37% formaldehyde is added dropwise, and the temperature is controlled not to exceed 90°C. After dropping, the temperature is raised to 100-105°C for condensation reaction. Keep it at the end of 6 hours. Add 32% liquid caustic soda to neutralize. The neutralized mat...
Example Embodiment
[0016] Example 3
[0017] Weigh 166 grams of fluorene into a 500 ml four-necked flask equipped with a stirrer, a thermometer, and a condenser, start stirring, and heat in a heating furnace. When the temperature reached 110°C, 90 grams of 98% sulfuric acid was added dropwise. After the dripping is completed, when the temperature is raised to 140°C and the vacuum starts to reach 0.085Mpa., and keep warm, water and oil will flow out. After 3 hours of holding, the reaction is over. Stop the vacuum, cool to 120°C, add water to hydrolyze the acidity. Collect and separate the outflow water layer and oil layer. The oil layer can be reused next time after sulfonation. When the sulfonated material is cooled to 80°C, 60 grams of 37% formaldehyde is added dropwise, and the temperature is controlled not to exceed 90°C. After dropping, the temperature is raised to 100-105°C for condensation reaction. Keep it at the end of 6 hours. Add 32% liquid caustic soda to neutralize. The neutrali...
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