Lowig


Lowig :

Also called Ferrite. A causticization process-the conversion of sodium carbonate to sodium hydroxide. The sodium carbonate is mixed with iron oxide and heated for several hours in a rotating kiln. Carbon dioxide is evolved and sodium ferrite remains: Na2CO3 + Fe2O3 = 2NaFeO2 + CO2. The product is agitated with water, producing sodium hydroxide and ferric oxide for re-use: 2NaFeO2 + H2O = 2NaOH + Fe2O3. (Check source for accuracy of chemical formula)

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