Preparation method of white carbon black with high structure and high oil absorption value
A technology of high oil absorption and white carbon black, applied in the direction of silica, silicon oxide, fibrous fillers, etc., can solve the problem that the oil absorption value is difficult to meet the performance requirements
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Embodiment 1
[0018] 1. Sodium silicate for preparation reaction: the modulus is 3.4, and the concentration is 1.015mol / L; acid for preparation reaction: sulfuric acid with mass ratio concentration of 30%.
[0019] 2. In a 50L glass reactor with stirring, add 15L water and 6L sodium silicate solution with a concentration of 1.015mol / L, add sodium dodecylbenzenesulfonate according to 0.1% of the mass of sodium silicate, start stirring and heating To 75°C, add sulfuric acid dropwise to the reactor until it becomes a gel, stop adding acid, complete the primary reaction, form a gel within 30 minutes, and continue stirring for 20 minutes.
[0020] 3. Keep the temperature at 75°C, add sulfuric acid for primary reaction and stir until a uniform suspension, the reaction time is 20 minutes, and stop adding acid after adjusting the pH to 4.5, add 3 -Glycidyl etheroxypropyltrimethoxysilane, aged for 30 minutes; stirred and kept at a constant temperature of 75°C, continued to add sodium silicate soluti...
Embodiment 2
[0025] 1. Sodium silicate for preparation reaction: the modulus is 3.4, and the concentration is 1.015mol / L; acid for preparation reaction: sulfuric acid with mass ratio concentration of 45%.
[0026] 2. In a 50L stirred glass reactor, add 15L water and 6L sodium silicate solution with a concentration of 1.015mol / L, add sodium dodecylbenzenesulfonate (SDBS) according to 0.1% of the mass of sodium silicate, Start stirring and heat to 75°C, then add sulfuric acid dropwise to the reaction kettle until it becomes a gel, stop adding acid, complete the primary reaction, form a gel within 25 minutes, and continue stirring for 20 minutes.
[0027] 3. Keep the temperature at 75°C, add sulfuric acid for primary reaction and stir until a uniform suspension, the reaction time is 20 minutes, and stop adding acid after adjusting the pH to 4.5, add 3 -Glycidyl etheroxypropyltrimethoxysilane, aged for 30 minutes; stirred and kept at a constant temperature of 75°C, continued to add sodium sili...
Embodiment 3
[0032] The difference from Example 1 is that the reaction process temperature is set at 85° C., and other conditions are the same as in Example 1.
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