Film-coating problems encountered during

Microreaction technology allows for better temperature control, and a safer provision and handling of H P both within and outside the range of explosive mixtures with propene and PO. To minimize the decomposition of H P during the evaporation phase, a microstructured falling-film evaporator is used, placed below the mixing device and reaction zone. The reaction is carried out with an excess of propene, at temperatures below 160 °C and a pressure below 1.5 atm. Por a propene conversion of 5-20%, the selectivity for PO obtained is around 90%, but the selectivity with respect to HP is 25%. The catalyst is coated onto the reactor module, forming a layer several hundred micrometers thick. One problem encountered was the slow accumulation of deposits on the catalysts, which were derived from the formation of by-products. 

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