Determination of Temperature Profile within Continuous Micromixer-Tube ReactorUsed for the Exothermic Addition of Dimethyl Amine to Acrylonitrile and anExothermic Ionic Liquid Synthesis

摘要

Continuous micromixer-tube reactors are versatile and widely used tools to explorethe benefits of microreactor processing for organic synthesis. Due to enhanced mass andheat transfer capabilities and mechanical stability with regard to temperature and pressuretheir use can lead for given chemical protocols to process intensification and as importantadditional aspect enable process chemistry with novel features not feasible so far becauseof limits of conventional equipment. Naturally, the heat transfer capabilities of the tubesection within continuous micromixer-tube reactors are - albeit enhanced - limited especiallysince they are often rather meso- than microstructed. In this context the temperatureprofiles within the tube section of a continuous micromixer-tube reactor was determined fortwo exothermic reactions, the addition of dimethly amine to acrylonitrile and an ionic liquidsynthesis, in order to determine the occurrence and extent of hot spot formation for differentprocess conditions and to gain thereby also a deeper understanding of the processes.Seven temperature sensing elements were therefore integrated into the tube section.Furthermore, it is outlined how these experiments can contribute to the targeted adaptationof the reactors.