Docosanoic Acid → Sodium Behenate

Participants

Reaction Steps

In an amount of 87.6 g of behenic acid (Edenor C22-85R, trade name, produced by Henkel Co.), 49.2 mL of 5 mol/L NaOH aqueous solution and 120 mL of tert-butyl alcohol were mixed and allowed to react at 75° C. to obtain a solution of sodium behenate. This sodium behenate solution and an aqueous silver nitrate solution were added to a reaction vessel containing 635 mL of distilled water and 30 mL of tert-butyl alcohol with stirring. At this time, the internal temperature of the reaction vessel was kept at 30° C. and controlled so that the temperature of the solution should not be raised. After finishing the addition, the solid content was recovered by suction filtration and the solid content was washed with water. Wet cake corresponding to 100 g of the dry solid content of the obtained silver behenate was added with 7.4 g of polyvinyl alcohol (PVA-217, trade name, average polymerization degree: about 1700) and water, pre-dispersed by a homomixer and then dispersed in a dispersing machine (Microfluidizer-M-110S-EH; trade name, produced by Microfluidex International Corporation, using G10Z interaction chamber) to obtain Silver behenate dispersion A.

Provenance & Evidence