Preparation method of silica gel carrier
A carrier, silica gel technology, applied in the direction of silicon oxide, can solve the problems of many silica gel components and complicated preparation process, and achieve the effect of avoiding re-agglomeration, simple preparation method and short process flow
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Embodiment 1
[0017] Put 200ml of deionized water into the reactor equipped with stirrer, temperature controller and pH meter, start the temperature controller and stirrer, make the temperature of the reactor temperature 85°C, and stir the speed at 3000 revolutions / min. To prepare solution A, first prepare a sodium silicate solution with a concentration of 0.3 mol / L, and then add the surfactant sodium dodecylbenzene sulfonate to this solution to make the concentration of sodium dodecyl benzene sulfonate 0.01 mol / l; Prepare sulfuric acid solution B, the concentration of B solution is 0.5mol / L. Solution A was added dropwise at a rate of 3 ml / min, while solution B was added dropwise, so that the pH value of the solution in the reactor was always maintained at 8.0, while maintaining the temperature and stirring speed of the reactor. Immediately stop adding solution B after dripping solution A, aging at a constant temperature for 1 hour under stirring, and let it stand overnight.
[0018] Add ammon...
Embodiment 2
[0020] The preparation process is the same as in Example 1. When the concentration of sodium silicate in solution A is 0.2 mol / L, the concentration of sodium lauryl sulfate is 0.01 mol / l, and the pH of the mixed solution is 8.5 when the solution is added in parallel, the temperature of the solution is At 80℃, the surface area of the obtained silica gel carrier is 226m 2 / g, the most probable pore size distribution is 7.4803nm, the bulk density is 0.4847g / ml, and the particle size is 30nm.
Embodiment 3
[0022] The preparation process is the same as in Example 1. The concentration of sodium silicate in solution A is 0.5 mol / L, the concentration of surfactant Tween-80 is 0.015 mol / L, and the temperature of the mixed solution is maintained at 80°C and the pH value is maintained at 8.0. , The specific surface area of the obtained silica gel is 255m 2 / g, the most probable distribution is 9.1850nm. The bulk density is 0.4389g / ml, and the particle size is 30nm.
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