Question

What are different steps of solvay's procesz for manufacturing of washing soda?

Answer 1

The Solvay process is extensively used for industrial preparation of sodium carbonate (soda ash). The process is named after Ernest Solvay who developed the process during the 1860s.

Carbon dioxide reacts with the dissolved ammonia to form ammonium carbonate followed by ammonium hydrogen carbonate.

2NH3 +H2O + CO2 ---> (NH4)2CO3

(Ammonia) (Ammonium Carbonate)

(NH4)2CO3 + H2O + CO2 --> NH4HCO3

(Ammonium Carbonate) (Ammonium hydrogen carbonate)

NH4HCO3 + NaCl --> NH4Cl + NaHCO3

Sodium hydrogen carbonate crystal separates. These are heated to give sodium carbonate.

2 NaHCO3 --> Na2CO3 + CO2 + H2O

But this process cannot be used to prepare potassium due to the high solubility of potassium bicarbonate and hence difficult to be precipitated by adding ammonium bicarbonate to a saturated solution of potassium

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Answer 2

The Solvay process or ammonia-soda process is the major industrial process for the production of sodium carbonate. The ammonia-soda process was developed into its modern form by the Belgian chemist Ernest Solvay during the 1860s. The ingredients for this are readily available and inexpensive: salt brine and limestone.

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