Multi-phase countercurrent reactor process and apparatus

TLDR: In this article, a countercurrent continuous catalytic reactor and process for treating a liquid phase, such as oil, with a gaseous reactant is described, where a level detector 30 is disposed in a froth zone above the catalyst bed 12 for detecting level of a mixed gas-liquid froth.

Abstract: A countercurrent continuous catalytic reactor and process for treating a liquid phase, such as oil, with a gaseous reactant. An enclosed reactor shell 10 contains a fixed porous bed 12 of solid catalyst, an upper liquid inlet 14 for introducing a stream of liquid substantially above the catalyst bed 12 for downward gravity flow through the bed, and a lower liquid outlet 16 for withdrawing treated liquid from the reactor shell 10. A gaseous reactant is dispersed through the liquid phase in intimate contact with the solid catalyst, and withdrawn above the catalyst bed 12. A level detector 30 is disposed in a froth zone above the catalyst bed 12 for detecting level of a mixed gas-liquid froth. Fluid handling control 32 responsive to a level signal controls fluid stream flow for regulating froth level above the catalyst bed 12.