The cluster Reaction and Process Intensification consists of seven full time and part-time chairs and integrates world-class research on and understanding of multi-scale multi-phase flow, transport phenomena, thermodynamics, design and synthesis of new (reactive) affinity solvents/solids, use of renewable feed stock and (polymer) chemistry into the design, intensification, development and construction of new reactor, separator and process concepts from micro- to meter-scale. The chairs collaborate with chemical industry to make their processes more sustainable by increasing their energy and feed stock efficiency, by the development of novel chemical/physical operating windows, and by the use of renewable feed stock. The chairs implement their novel process and equipment concepts in close collaboration with the chemical industry and engineering firms and equipment manufacturers. Valorisation of research takes also place through spin-off companies.