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Sodium Carbonate (Na2CO3) Popularly known as washing soda or soda ash, sodium carbonate is a commercially important compound. In earlier days, it was obtained from the ash of plants and from natural deposits in India and Egypt.   Manufacture of Sodium Carbonate Raw Materials Sodium chloride – NaCl (brine solution) Ammonia – NH3 Limestone – CaCO3 (for carbon dioxide supply)   Principal Reactions Process The first step in the manufacture of sodium carbonate is to generate carbon dioxide. This can be got by heating limestone. The Plant Used in the Solvay Process Saturation of Brine With Ammonia Brine solution is pumped into the ammonia absorber. From the ammonia recovery tower, ammonia mixed with a little carbon dioxide enters the absorber and saturates brine. Impurities of calcium and magnesium present in brine are precipitated as carbonates. These impurities can be removed by pumping the liquid through the filter press and then passed… Read More »SODIUM HYDROGEN CARBONATE AND SODIUM CARBONATE

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