New data to the origin of rate enhancement on the Pt-cinchona catalyzed enantioselective hydrogenation of activated ketones using continuous-flow fixed-bed reactor system

2008 ◽  
Vol 260 (2) ◽  
pp. 245-253 ◽  
Author(s):  
György Szöllősi ◽  
Szabolcs Cserényi ◽  
Ferenc Fülöp ◽  
Mihály Bartók
2010 ◽  
Vol 12 (1) ◽  
pp. 14-19 ◽  
Author(s):  
Szabolcs Cserényi ◽  
György Szőllősi ◽  
Kornél Szőri ◽  
Ferenc Fülöp ◽  
Mihály Bartók

1985 ◽  
Vol 50 (10) ◽  
pp. 2122-2133 ◽  
Author(s):  
Jindřich Zahradník ◽  
Marie Fialová ◽  
Jan Škoda ◽  
Helena Škodová

An experimental study was carried out aimed at establishing a data base for an optimum design of a continuous flow fixed-bed reactor for biotransformation of ammonium fumarate to L-aspartic acid catalyzed by immobilized cells of the strain Escherichia alcalescens dispar group. The experimental program included studies of the effect of reactor geometry, catalytic particle size, and packed bed arrangement on reactor hydrodynamics and on the rate of substrate conversion. An expression for the effective reaction rate was derived including the effect of mass transfer and conditions of the safe conversion-data scale-up were defined. Suggestions for the design of a pilot plant reactor (100 t/year) were formulated and decisive design parameters of such reactor were estimated for several variants of problem formulation.


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