Water → Sodium Behenate

関与物質

反応条件

反応手順

In an amount of 87.6 kg of behenic acid (Edenor C22-85R, produced by Henkel Co.), 423 L of distilled water, 49.2 L of 5 mol/L aqueous solution of NaOH and 120 L of tert-butanol were mixed and allowed to react with stirring at 75° C. for one hour to obtain a solution of sodium behenate. Separately, 206.2 L of an aqueous solution containing 40.4 kg of silver nitrate was prepared and kept at 10° C. A mixture of 635 L of distilled water and 30 L of tert-butanol contained in a reaction vessel kept at 30° C. was added with the whole volume of the aforementioned sodium behenate solution and the whole volume of the aqueous silver nitrate solution with stirring at constant flow rates over the periods of 62 minutes and 10 seconds, and 60 minutes, respectively. In this operation, the aqueous silver nitrate solution was added in such a manner that only the aqueous silver nitrate solution should be added for 7 minutes and 20 seconds after starting the addition of the aqueous silver nitrate solution, and then the addition of the aqueous solution of sodium behenate was started and added in such a manner that only the aqueous solution of sodium behenate should be added for 9 minutes and 30 seconds after finishing the addition of the aqueous silver nitrate solution. During the addition, the temperature was controlled so that the temperature in the reaction vessel should be 30° C. and the liquid temperature should not be raised. The piping of the addition system for the sodium behenate solution was warmed by steam trace and the steam amount was controlled so that the liquid temperature at the outlet orifice of the addition nozzle should be 75° C. Further, the piping of the addition system for the aqueous silver nitrate solution was maintained by circulating cold water outside a double pipe. The addition position of the sodium behenate solution and the addition position of the aqueous silver nitrate solution were arranged symmetrically with respect to the stirring axis as the center, and the positions were controlled to be at heights for not contacting with the reaction mixture.

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