In a Solvay process CO2 has to be pure and released from {HEAD ~ CaCO3 kilns} in {TAIL ~ order} to react it with ammonia gas and brine solution under precise conditions of the Solvay column 
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In a Solvay process CO2 has to be pure and released from { HEAD ~ CaCO3 kilns } in { TAIL ~ order } to react it with ammonia gas and brine solution under precise conditions of the Solvay column
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH