Solvay process: Difference between revisions

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The Solvay Process is a chemical process which uses [[ammonia]] to convert [[salt]] and [[calcium carbonate]]  into [[sodium carbonate]] and [[calcium chloride]].
The Solvay Process is a chemical process which uses [[ammonia]] to convert [[salt]] and [[calcium carbonate]]  into [[sodium carbonate]] and [[calcium chloride]].
# Roast[[lcalcium carbonate]] ([[Limestone]]) to give [[calcium oxide]] and [[carbon dioxide]]:
# Roast [[calcium carbonate]] ([[Limestone]]) to give [[calcium oxide]] and [[carbon dioxide]]:
#:{{#Chem:CaCO3 = CaO + CO2 //roast}}
#:{{#Chem:CaCO3 = CaO + CO2 //roast}}
# Bubble [[carbon dioxide]] through a mixture of aqueous [[ammonia]] and [[salt]] in [[water]], giving [[ammonium chloride]] and [[sodium bicarbonate]]
# Bubble [[carbon dioxide]] through a mixture of aqueous [[ammonia]] and [[salt]] in [[water]], giving [[ammonium chloride]] and [[sodium bicarbonate]]
#:{{#Chem: NaCl + NH3 + H2O + CO2 = NaHCO3↓(s) + NH4Cl(aq)}}
#:{{#Chem: NaCl + NH3 + H2O + CO2 = NaHCO3↓(s) + NH4Cl(aq)}}
# Filter off the [[sodium bicarbonate]]
# Filter off the [[sodium bicarbonate]]
$ Recombine the [[calcium oxide]] with the aqueous [[ammonium chloride]] giving [[ammonia]] and [[calcium chloride]].
# Recombine the [[calcium oxide]] with the aqueous [[ammonium chloride]] giving [[ammonia]] and [[calcium chloride]].
#: {{#Chem: 2NH4Cl(aq) + CaO = 2NH3 + CaCl2 +H2O}}
#: {{#Chem: 2NH4Cl(aq) + CaO = 2NH3 + CaCl2 +H2O}}
[[Category:Processes]]
[[Category:Processes]]

Latest revision as of 23:07, 14 October 2023

The Solvay Process is a chemical process which uses ammonia to convert salt and calcium carbonate into sodium carbonate and calcium chloride.

  1. Roast calcium carbonate (Limestone) to give calcium oxide and carbon dioxide:
    CaCO3 CaO + CO2 // roast
  2. Bubble carbon dioxide through a mixture of aqueous ammonia and salt in water, giving ammonium chloride and sodium bicarbonate
    NaCl + NH3 + H2O + CO2 NaHCO3(s) + NH4Cl(aq)
  3. Filter off the sodium bicarbonate
  4. Recombine the calcium oxide with the aqueous ammonium chloride giving ammonia and calcium chloride.
    2 NH4Cl(aq) + CaO 2 NH3 + CaCl2 + H2O