Processes carried out in the presence of a solid contacting agent which is either a physical mixture of several solids or a complex chemical combination of such solids.
(Processes; carried out; L:in the presence of a solid contacting agent) (a solid contacting agent; is; either a physical mixture of several solids or a complex chemical combination of such solids)
Processes a solid contacting agent
carried out is
L:in the presence of a solid contacting agent
either a physical mixture of several solids or a complex chemical combination of such solids