Abstract:
Foaming products are produced through a saponification reaction between lauric acid and potassium hydroxide. To obtain potassium laurate crystalline product, by reacting at 90ºC for 60 min and collecting samples at 0, 10, 20, 30, 40, 50 and 60 min, it was found that the conversion value increased rapidly at 60 min. The conversion value was at 94.77% with no effect on the reaction time. For the study of the effect of cooling rate on the crystallization of potassium laurate, it was found that the cooling rate of 1-2 ºC/min was the suitable cooling rate for cleansing foam production. The texture of the product is shiny and beautifully arranged crystals. It is the optimum controlled rate of product cooling and complete crystallization. Study on changes in potassium hydroxide content to observe the change of product texture and pearlescent effect in the product texture. It was found that KOH 7%, KOH 15% had a hard, crumbly texture, opaque gel, and clear pearlescent effect in the product. Therefore, reducing the amount of potassium hydroxide may increase the amount of reactants used in the reaction. Increasing the amount of lauric acid to observe the change in product texture. By studying the phase transition by Differential Scanning Calorimetry (DSC), it was found that the crystallization temperature was similar and consistent with the pearlescent texture of the product. The crystals formed immediately after the temperature was lowered.