The paper deals with the integration of shared resources in the formulation of process industry scheduling problems, with reference to the optimal operation of those processes that are composed by continuous and batch units tightly integrated by means of mass or energy flows. It uses as a reference a benchmark developed in the EU project HYCON2: a simplified crystallization section of a sugar factory. The aim is to present a novel formulation that allows the coordination of the continuous and discrete processes with shared resources generating feasible schedules that can be easily integrated in a wider optimization scheme. The approach uses formal scheduling methods, mixing three different time frames: one in continuous time for scheduling, another to describe the time evolution of the shared resources and a discrete one for synchronization of the shared resources and the integration with the continuous dynamics. (C) 2019 Elsevier Ltd. All rights reserved.