Preparation and use of polysilicate granular material
A granular material, polyaluminosilicate technology, applied in fibrous fillers, textiles and papermaking, inorganic pigment treatment, etc., to achieve the effect of improving physical stability, good physical stability, and avoiding gelation
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Embodiment 1
[0045] In this particular example, aluminum doped silicic acid was prepared by adding 88.6 g of aluminum chlorohydrate to 1160 g of the 7% silicic acid sol prepared above.
[0046] 1000 ml of deionized water was added to the reaction flask and heated to 90°C. The aluminum-doped acid sol was fed via a peristaltic pump at a rate of 4.6 ml / min for two hours with pumping paused for 15 minutes. After 15 minutes, 50 mL of concentrated ammonium hydroxide was added to raise the pH of the reaction mixture to approximately pH9. The addition of the aluminum-doped silicic acid was continued until 130 g of the added aluminum-doped silicic acid were fed into the system. During this time, the pH was monitored periodically and an additional amount of 20% ammonium hydroxide was added to maintain the pH of the material above 9.5. The total addition time was approximately 3 hours.
[0047] After completion of the feed of aluminum-doped silicic acid, the reaction was heated at 90°C for an addi...
Embodiment 2
[0053] The experiment of Example 1 was repeated, wherein the polyaluminosilicate was prepared in a manner analogous to Example 1, but containing 34% by weight of Al, based on the silica present 2 o 3 , SiO 2 :Al 2 o 3 The molar ratio is 4.99.
[0054] In this embodiment, tests similar to Example 1 showed a surface area of 238 m 2 / g, the pore volume is 0.95cc / gm, and the pore diameter is 160 angstroms.
[0055] Comparative Example 3
[0056] The experiment of Example 1 was repeated to prepare an aluminum doped acid sol by adding 100.28 g of aluminum chlorohydrate to 1,286 g of a 4.9% acid sol prepared as previously described. A "mother liquor" was prepared by adding 750 ml of deionized water to the reaction flask and heating to 90°C. The aluminum doped acid sol was added via a peristaltic pump at a rate of 5.0 ml per minute until the full amount of acid sol was fed. No pH adjustment was made during the reaction in order to keep the conditions slightly acidic. The re...
Embodiment 4
[0060] Another experiment similar to Example 1 was performed, except Al 2 o 3 10% on the percentage of silicate present and SiO 2 :Al 2 o 3 The molar ratio is 16.97.
[0061] The resulting particulate material was measured to have 537.7M 2 / g surface area, 0.84cc / gm pore volume and 62.6 angstrom pore diameter.
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Abstract
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