Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)We analyze a fully discrete finite element scheme based on the backward Euler method for a system consisting of a Cahn-Hilliard and several Allen-Cahn type equations closely related to that proposed by Fan et al. for modeling Ostwald ripening in a two-phase system. As a consequence of the analysis, we prove the existence and uniqueness of solutions of the discrete problems, as well as their convergence to the solution of the original system. Error estimates are also presented.2941858883904Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)FAPESP [98/15946-5]