V. A. Bassili, A. Baiker
1991
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0
Influential Citations
3
Citations
Journal
Applied Catalysis
Abstract
Abstract The kinetics of the dehydroamination of 1-methoxypropan-2-ol (MPOL) with ammonia to 1-methoxy-2-aminopropane (MPIN) over nickel-on-silica have been described by a four-parameter Langmuir-Hinshelwood model based on the reaction pathway earlier proposed for the amination of alkoxyalkylalcohols. This pathway includes the following steps: (i) dehydrogenation of MPOL to a ketone type intermediate, (ii) ammonolysis of the ketone type intermediate, and (iii) hydrogenation of the imine/enamine type intermediate. The dehydrogenation of MPOL is considered to be the rate-limiting step of the overall amination reaction. Side reactions are not taken into account since high selectivities (87.5%) are achieved over a wide parameter range (temperature, 140-180°C; space time, 2000-16000 s kg/kmol; ammonia-to-MPOL ratio, 1-16; and hydrogen-to-MPOL ratio, 0.5-8). Temperature, space time and ammonia-to-MPOL ratio are shown to be most decisive for the yield of MPIN.