Men'shchikov V.A.,OOO Tekhnologii VNIIOS |
Semenov I.P.,Lomonosov Moscow University of Fine Chemical Technology
Catalysis in Industry | Year: 2013
This work is devoted to developing a domestic process for the catalytic dehydrogenation of ethanol into ethylacetate, a product that is widely used as a solvent in the production of paint-and-lacquer materials, medicinal substances, and printing ink dyes for the food industry. The process is an alternative to the conventional method for producing of ethylacetate via the esterification of acetic acid with ethanol. In our process, ethanol (bioethanol) is the only raw material. Compared to the traditional technique, our process is nearly wasteless with respect to the raw material despite its reversibility and produces no harsh media or waste water. Ethanol is dehydrogenated into ethylacetate on NTK industrial catalysts (OOO Dorogobuzh, Russia) with different chemical composition. The catalysts are tested in a flow unit within a range of temperatures of 230-300 °C and pressures of 0.1-2.0 MPa. The NTK-4 catalyst yields the best results: it allows the single-pass conversion of ethanol from 40 to 63% at a process selectivity of 86-94%. The NTK-4 catalyst exhibits stable operation and reproducibility of results under the conditions of laboratory tests, and the process is intended for tests in a pilot unit. The process could be of interest to low-capacity enterprises that are not equipped to operate with sulfuric acid using the conventional method and are engaged in the fields of solvents, the paint and lacquer industry, and packing materials. © 2013 Pleiades Publishing, Ltd.
Men'Shchikov V.A.,OOO Tekhnologii VNIIOS |
Gol'Dshtein L.Kh.,OOO Tekhnologii VNIIOS |
Semenov I.P.,OOO Tekhnologii VNIIOS
Kinetics and Catalysis | Year: 2014
The kinetics of gas-phase dehydrogenation of ethanol into ethyl acetate over a copper-zinc-chromium catalyst has been investigated in a flow reactor at pressures of 10-20 atm and temperatures of 230-290 C. For the process occurring under kinetic control, the rate constants of two reactions and the adsorption constants of five components have been determined using the Langmuir-Hinshelwood model. A kinetic model has been developed for the process. This model provides means to design a reactor for dehydrogenation of ethanol into ethyl acetate in different regimes. © 2014 Pleiades Publishing, Ltd.