The financial benefit comes from selling {HEAD ~ the soda commodity chemicals} as {TAIL ~ byproduct} of the combined processes 
as
The financial benefit comes from selling { HEAD ~ the soda commodity chemicals } as { TAIL ~ byproduct } of the combined processes
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH