Water → Sodium Behenate

Participants

Reaction Steps

Dispersion “F” was prepared using the small-sized crystallization equipment as shown in FIG. 2. While stirring in the tank 12 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 5N aqueous NaOH solution over 5 minutes, and was then allowed to react for 60 minutes to obtain 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 11 at 10° C. The tank 20 was pre-charged with 6,000 ml of pure water, which was circulated at a flow rate of 1,000 ml/minute via the pump 17. While rotating a mixing blade of a closed mixing apparatus 18 (Pipeline Mixer Model LR-I, product of Mizuho Kogyo K.K.) at 10,000 rpm, the above aqueous silver nitrate solution was fed at a constant flow rate of29 ml/minute, 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 19 to a tank 20 and stocked. An average temperature of the content of the tank 20 was 30° C., when a cooling water of 10° C. was supplied both to a jacket of the tank 20 and the heat exchanger 19 at 20 L/minute. 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 filtered 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