Water → Sodium Behenate

Participants

Reaction Steps

The dispersion “C” was prepared using the small-sized crystallization equipment as shown in FIG. 3. While stirring in the tank 32 a mixture of 876 g of behenic acid (Edenor C22-85R, product of Henkel Corporation), 4,230 ml of distilled water and 1,200 ml of tert-butanol at 75° C., added thereto was 492 ml of a 5 mol/L aqueous NaOH solution over 5 minutes, and was then allowed to react for 60 minutes to obtain a sodium behenate solution. Independently, 2,062 ml of aqueous solution containing 404 g of silver nitrate (pH 4.0) was prepared and kept in a tank 31 at 10° C., and 6,000 ml of pure water was stored in a tank 41 at 10° C. While rotating rotating blades of a mixing apparatus 38 (Pipeline Mixer Model LR-I, product of Mizuho Kogyo K.K.) at 10,000 rpm, the above aqueous silver nitrate solution and pure water were fed at constant flow rates of 29 ml/minute and 98 ml/minute, respectively, and 5 seconds after, the sodium behenate solution was fed at a constant flow rate of 98 ml/minute, which were then sent via an heat exchanger 39 to a tank 40 and stocked. An average temperature of the content of the tank 40 was 30° C., when a cooling water of 10° C. was supplied to a jacket of the tank 40 at 20 L/minute while ceasing supply of cooling water to the heat exchanger 39. The mixture was allowed to stand for 20 minutes under stirring, and then cooled to 25° C. The solid content was separated by suction filtration, and then washed with water until electric conductivity of the wash water decreased as low as 30 μS/cm. The obtained solid content was stored in a form of a wet cake without drying.

Provenance & Evidence