Selective hydrogenation reactions are of big importance for organic chemical industry. The selective hydrogenation of 1.3-Butadiene to Butene is an very important example for this type of reactions. This thesis gives a bibliographic survey on the basis of heterogeneous catalysis in a three-phase system, focused on the economic importance of heterogeneous-catalytic processes. Apart from the different types of reactors, which are being used in large-scale units, pilot designs of catalytic three stage reactions are summarized. An Abstract is given which covers the level of knowledge on the mechanism of selective hydrogenation of C4-hydrocarbon mixtures. In compliance with analogies to the processes in two-stage systems, kinetic equations for C4-selective hydrogenation which have been developed by different authors are given. the differential cycle reactor unit allows to set up a new-style measuring method which provides the opportunity to investigate heterogeneous-catalytic three-stage processes and serves for the characterization of kinetic correlations. furthermore the, this method, which is based upon the use of catalysts in their original shape, is suitable for the comparative investigation of the characterization of catalysts. The general suitability of the minimum space reactor for the investigation of three-stage systems has been investigated using the example of selective hydrogenation of a butadiene-containing technical C4-raw fraction in the course of a comprehensive test series. Special importance has been allocated to the investigation of the overall stage conditions as well as proof of stable three-stage-ratios in the defined scope of parameters in the pilot reactor. In order to analyze the influence of selected catalyst characterization on conversion and selectivity, test catalysts with different characteristics are investigated. The individual catalysts are characterized by different penetration depths of the active component, textures of support materials, Palladium contents and metal dispersities. The results of the investigations allows a characterization and an evaluation of the influence of the material transport on the surface reaction. On the basis of the investigations performed with standard catalyst, a simple kinetic model is selected. Since the reaction paths cannot be quantified in a sufficient and conclusive way, model equations are formed as equipotential approaches. The model considers for the occurring oligomere formation.