Optimization of the process for obtaining ethyl acetate by dehydrogenation of ethanol by achieving the stage of selective hydrogenation of acetaldehyde and feedstock replacing

The paper presents the results of real implementation of the acetaldehyde hydrogenation stage into the industrial process for ethyl acetate production by ethanol dehydrogenation. It has been shown for the first time with the selection of optimal conditions in parallel with acetaldehyde hydrogenation it is possible to obtain an increase in ethyl acetate, which is confirmed by the data from the pilot plant data and kinetic modeling data. The studies were carried out on a pilot plant with a production rate of 200 l/h, analytical control was carried out by the chromatographic method. The results obtained show that, in comparison with similar works, it is possible to simultaneously achieve acetaldehyde hydrogenation and an increase in ethyl acetate. The implementation of the selective hydrogenation stage of by-products will facilitate the isolation of commercial-quality ethyl acetate from the reaction mass, as well as increase the product yield due to the return of ethanol formed at the selective hydrogenation stage back into the reactor. Also, this paper provides practical recommendations on the operating modes of the catalyst.