Oxidation von n-Butan zu Maleinsaeureanhydrid in der Wirbelschicht. Teilprojekt: Reaktor- und Verfahrensentwicklung Abschlussbericht

This present research project is part of a development of an oxidation process for maleic anhydride (MA) conducted together with the Institute fuer Chemische Technik (director: Prof. Emig) of the university of Karlsruhe. In this part the application of fluidized-bed technology for oxidation of n-butane to maleic anhydride was examined. On the basis of our knowledge on catalytic fluidized beds a mathematical model of the process has been developed which takes into consideration the reactions in the freeboard. The simulation runs with the reaction kinetics supplied by the Karlsruhe-working-group demonstrated that the SiO_2-capsulated VPO-catalyst has a sufficient activity and selectivity to MA for operation of a commercial plant. An estimation of the production costs amounted to a value which lay close beneath the proceeds of that time. A simple model for the attrition rate of catalysts which is proposed here gives a good representation of the influences of jet-orifice diameter, jet velocity and jet-gas density. It allows the estimation of attrition rate of technical gas distributors on the basis of bench-scale attrition tests. (orig.)SIGLEAvailable from TIB Hannover: F95B558+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekAkzo International Research GmbH, Obernburg (Germany); Bundesministerium fuer Forschung und Technologie (BMFT), Bonn (Germany)DEGerman