Abstract
A new electrochemical reactor involving a mercury cathode and a two-phase (gas-liquid) flow has been studied with a view to continuously manufacturing hexaphenyl and hexabutyldistannane b'y reduction of triorganotin chloride R3SnCl. In each case the interpretation of the determining step of the process is discussed after a study of the electrochemical kinetics. In the reactor an efficient renewal of the cathodic surface is obtained by passing the electrolysis solution together with nitrogen gas through the mercury pool. Results of mass transfer rate studies with the cell working either as a plug-flow reactor or as a continuously stirred reactor are compared for different gas and electrolyte flows. The experiments show that gas and electrolyte flows through a mercury pool offer attractive possibilities of application for large-scale preparative electrolysis, by solving simultaneously the problems of mass transport and electrode surface renewal.
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