This invention is particularly useful in gas/liquid contacting processes where the packed tower or column is prone to undergo {HEAD ~ plugging} due to {TAIL ~ the presence} or formation of solid reactant or reaction product material within the tower 
This invention is particularly useful in gas / liquid contacting processes where the packed tower or column is prone to undergo { HEAD ~ plugging } due to { TAIL ~ the presence } or formation of solid reactant or reaction product material within the tower
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH