Distillation, absorption and extraction belong to the oldest and most mature separationtechnologies. They require often big columns and are energy intensive. In the chemicalprocessing industry these separations are applied usually for the purification of theproducts, recycling of solvents or catalysts, etc. And are placed as a last step of aproduction process, after the chemical reactor(s). The integration of separation andreaction in one single unit operation offer high potentials for process optimisation andhas been recognized as an important method for process intensification. Despite of thatpotential, reactive separation processes, like reactive distillation, reactive extractionand reactive absorption are sometimes recognize by industry as niche solutions only.One of the reasons for that situation is a lack of validated modelling methods ofcolumns for reactive separations or limited knowledge of the model parameters. Thispaper shows the modelling approaches of different complexity for some reactiveseparations, gives the recommendations for the most suitable simulation methods andillustrates the necessity for the harmony between the accuracy of the experimental
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