Water → Sodium orthosilicate

Participants

Reaction Steps

400 g of sodium hydroxide (manufactured by Nacalai Tesque Co., Ltd.) of a guaranteed reagent was dissolved into 1 liter of ion-exchanged water. 300 g of silicon dioxide (#200, manufactured by Aerosil Co. Ltd) which is commercially available was added to the dissolution and was stirred. Sodium silicate (NaSiO3) was obtained by calcining the dispersion for 5 hours at 700° C. 0.5 mol of said sodium silicate and 0.5 mol of stearyl-trimethylammonium chloride were added to 1 liter of ion-exchanged water and were dissolved at 50° C. The pH value on this occasion was 11.8. Further, 2N-HCl was gradually added to the dissolution and the pH value was adjusted to 8.5. The dissolution was then filtrated and washed with water 5 times repeatedly and a powder which holds stearyl-trimethylammonium chloride was obtained by drying this at room temperature by washing with acetone.

Provenance & Evidence