The group contribution method to predict diffusivities in binary liquid systems is compared with other well-known semi-empirical correlations, such as Wilke-Chang, Hayduk-Minhas and Tyn-Calus, by means of literature data including also systems of commercial interest, e.g. sulfolane-aromatics systems. This comparison indicates that the group contribution method is superior to the other correlations investigated. Furthermore, the prediction of diffusivities with the group contribution method is explained step-by-step by means of several examples.