Sodium percarbonate is a white powder that is used as bleach in detergent industries. Because of its sensitivity to environment and tendency to maintain the strength of bleaching action, it needs to be coated. Therefore, the drying of the coated sodium percarbonate particles is the main stage of their production process. In this study, the kinetics of the drying process of coated sodium percarboanate particles is investigated using a particle fluidization method and a conical fluidized bed dryer on,a laboratory scale. The experiments are conducted at the inlet air temperature of 60, 70, and 80 degrees C and the air flow rate of 90,100, and 120 m(3)/h. Then, some of the widely used drying models are fitted to the experimental data of the moisture ratio. The fit quality of the models is determined using the coefficient of determination (R-2), root mean square error (RMSE), and reduced chi - square (chi(2)). Among the Considered models, the 'Modified Henderson & Pabis' model with average R-2 = 0.988204 and the 'two term' model with average R-2 = 0.985082, under almost all operating conditions, and the model developed by Verma et al. with average R-2 = 0.971698 at high flow rate and high temperature are selected as the best models. In the drying process of coated sodium percarbonate particles, the effective diffusivity varies from 2.2337 x 10(-10) to 22.0648 x 10(-1) m(2)/s. (C) 2014 Elsevier B.V. All rights reserved.