Abstract
Countercurrent chromatography column was used as a chemical reactor for a reaction catalyzed by a liquid catalyst. The countercurrent chromatography machine was used as a continuous reactor and as an injected-plug reactor. The reduction of benzaldehyde by sodium formate is possible at room temperature in an aqueous phase when a ruthenium–triphenylphosphine–trisulfonate complex liquid catalyst is used. Benzyl alcohol is formed. Benzaldehyde is located in a cyclohexane phase. The cyclohexane–water partition coefficients of benzaldehyde and benzyl alcohol were determined by countercurrent chromatography. The plug-flow character of the continuous countercurrent chromatography reactor is demonstrated. The chemical characteristic time is in the order of 1 h at 2 ml/min when the average benzaldehyde mass-transfer time is about 30 s in the countercurrent chromatography reactor. The chemistry kinetics is the limiting process. Using the countercurrent chromatography reactor with an injected plug of a reagent, it is shown that the profile of the band of the product obtained can be related to the kinetic characteristics of the liquid catalyst.
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