تفاعل #465950

معادلة التفاعل

behenic acid

water

NaOH

→

sodium behenate

المذيبات

tert-butanol

ظروف التفاعل

المعالجة

1. 1
   workup.ADDITIONMixed
2. 2
   أخرىto react at 75° C. for one hour

الإجراء التجريبي

Mixed were 87.6 g of behenic acid (Edenor C22-85R, product of Henkel Corporation), 423 ml of distilled water, 49.2 ml of a 5N aqueous NaOH solution and 120 ml of tert-butanol, and the mixture was allowed to react at 75° C. for one hour under stirring to obtain sodium behenate solution. Independently, 206.2 ml of aqueous solution containing 40.4 g of silver nitrate (pH 4.0) was prepared and kept at 10° C. A reaction vessel containing 635 ml of distilled water and 30 ml of tert-butanol was kept at 30° C., and an entire volume of the sodium behenate solution and an entire volume of the silver nitrate aqueous solution were added at constant flow rates and over 62 minutes and 10 second, and over 60 minutes, respectively. Herein only the silver nitrate aqueous solution was added in a first 7-minute-and-20-second period after the start of the addition, then sodium behenate solution was concomitantly added, and only sodium behenate solution was added in a last 9-minute-and-30-second period after the end of addition of the aqueous silver nitrate solution. The temperature in the reaction vessel is kept at 30° C., and was controlled externally so as to keep the liquid temperature constant. A piping in a feeding system of the sodium behenate solution was heated using a steam trace, where a steam aperture being adjusted so as to control the outlet liquid temperature at the end of the feed nozzle at 75° C. A piping in a feeding system of the silver nitrate aqueous solution was heated by circulating cold water in an outer portion of the double pipe. Points of addition of the sodium behenate solution and silver nitrate aqueous solution were symmetrically arranged centered around a stirring axis, the heights of which being adjusted so as to avoid contact to the reaction solution.

المصدر