The field of process integration has gained special importance in the design of chemical processes for its impact in the reduction of energy and fresh water consumption, and in the amount of wastewater generated. Several streams in a given process involve mixtures, and their treatment in integration methods typically assume constant values for their thermodynamic properties, and available mass integration techniques use property operators based on properties of pure compounds and linear mixing rules. Furthermore, the changes of properties in a given unit are typically carried out on an individual basis, neglecting the interactions that may exist with other properties. In this work we report models for the prediction of two properties, kinematic viscosity and thermal conductivity. Kinematic viscosity was chosen because it can be used to follow the interaction between two properties, namely density and dynamic viscosity, and five different models were tested. The model for thermal conductivity included the effect of temperature and composition, for which six different models were tried. Reported experimental data were used to test the models. Based on the resulting models, new functionalities were developed for the implementation of property operators suitable for their application in the design of integration networks. (C) 2014 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.