Sodium Hydroxide → Tetraaluminum;trisilicate

Temperature

98 °C

A sodium orthosilicate aqueous solution in the amount of 5000 ml diluted with purified water was prepared so that the Si concentration became 525 mmol/L. Aside from this, aluminum chloride was dissolved in purified water, and 5000 ml of aqueous solution having an Al concentration of 625 mmol/L was prepared. Subsequently, the sodium orthosilicate aqueous solution was mixed with the aluminum chloride aqueous solution, and stirred with a magnetic stirrer. The silicon/aluminum ratio in this case was 0.84. Moreover, 335 ml of 1N sodium hydroxide aqueous solution was dripped into the mixed solution to obtain a pH of 6.5. This solution was evenly separated in three 4 L containers, and heated in a constant temperature bath for seven days at 98° C. Thus, an aqueous solution containing amorphous aluminum silicate substance having a peak in the vicinity of −78 ppm and −87 ppm in a 29Si solid NMR spectrum was obtained. After cooling, the aqueous solution was cleaned three times with centrifugation, and thereafter dried at 60° C.

1. customwas prepared
2. customto obtain a pH of 6.5
3. customThis solution was evenly separated in three 4 L containers
4. additionThus, an aqueous solution containing amorphous aluminum silicate substance
5. customwas obtained
6. temperatureAfter cooling
7. customdried at 60° C.

ORD record

ord-3fa06de567a24efebf0c959a74606fb1

Source dataset

uspto-grants-2012_07

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08227377B2