We report an application of the formalism of Laguerre-Volterra to model the temperature of a batch reactor in a chemical plant. To reduce substantially costs during the preparation of melamine resin, this study focuses on the initial phase where an efficient controllability of the heat provided to reactor is needed. This analysis have shown an acceptable agreement between model and data supporting the idea that the batch reactor presents interesting prospects to be automated by using mathematical models containing orthogonal polynomials. ©2010 IEEE.