THE KINETICS OF THERMAL DEHYDRATION OF CALCIUM COPPER-ACETATE HEXAHYDRATE

The kinetics of the thermal dehydration of crushed crystals of CaCu(CH 3CO2)(4) . 6H(2)O in a flowing nitrogen atmosphere have been studied b y means of isothermal gravimetry. At higher temperatures than 85 degre es C the dehydration seemed to be described by three-dimensional phase boundary reactions, R(3)(alpha). At temperatures lower than 80 degree s C, the initial part of the dehydration could be described by phase b oundary reactions, R(3)(alpha), that of the middle part follows the Av rami-Erofeev type reaction, A(2.5)(alpha), and then the kinetics of th e final part followed diffusion-controlled models. These transitions o f the dehydration mechanisms have been discussed on the basis of the d iffusion process of dissociated water molecules.