Production technology of ultra-large-pore adsorptive silica gels

[0016] Implementation example 1:

[0017] First add 10 liters of 15% sulfuric acid solution into the experimental reaction tower, and then add 6 liters of prepared SiO 2 Sodium silicate solution with a content of 30% was sprayed into the experimental reaction tower. The temperature in the tower was 105℃. After aging for 16 hours in an acidic solution with a pH value of 1-3, it entered the experimental water-washing tank. Wash in water at ℃, and after washing for 70 hours, carry out ammonia soaking for 7 hours, and then the temperature of the oven in the filter press drying stage is 100 ℃, and the drying time is 50 hours. The experimental data are shown in Table 1.

[0018] Table 1 Experimental data table

[0019]

[0020] Implementation example 2:

[0021] First add 10 liters of 18% sulfuric acid solution to the experimental reaction tower, and then add 6 liters of prepared SiO 2 Sodium silicate solution with a content of 35% was sprayed into the experimental reaction tower at a temperature of 107°C. After aging for 17 hours in an acidic solution with a pH value of 1-3, it enters the experimental water-washing tank. Wash in water at ℃, and after 72 hours of washing, carry out ammonia soaking for 7 hours, and then the temperature of the oven in the filter drying stage is 130℃, and the drying time is 52 hours. The experimental data are shown in Table 2.

[0022] Table 2 Experimental data table

[0023]

[0024] Implementation example 3:

[0025] First add 10 liters of 20% sulfuric acid solution to the experimental reaction tower, and then add 6 liters of prepared SiO 2 The sodium silicate solution with a content of 38% was sprayed into the experimental reaction tower. The temperature in the tower was 109℃. After aging for 15 hours in an acidic solution with a pH value of 1-3, it entered the experimental water-washing tank. Wash in water at ℃, and after washing for 73 hours, carry out ammonia soaking for 7 hours. Then, the temperature of the oven in the filter drying stage is 140℃, and the drying time is 50 hours. The experimental data are shown in Table 3.

[0026] Table 3 Experimental data table

[0027]