High-Quality Sodium Bicarbonate Manufacturer in India

Sodium Bicarbonate Manufacturing Process Overview

Sodium bicarbonate (NaHCO₃), commonly known as baking soda, is primarily manufactured through the Solvay Process, which also produces soda ash (sodium carbonate). Here's a step-by-step overview of the process:

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1. Raw Materials

• Sodium chloride (NaCl)—Common salt
• Ammonia (NH₃)
• Carbon dioxide (CO₂)
• Water (H₂O) These are the primary raw materials used in the Solvay process.

2. Formation of Ammonium Bicarbonate

• Ammonia is dissolved in water to form an ammonia solution.
• Carbon dioxide is bubbled through this solution, forming ammonium bicarbonate (NH₄HCO₃). NH₃+CO₂+H₂O→NH₄HCO₃

3. Reaction with Sodium Chloride

• The ammonium bicarbonate solution is then reacted with sodium chloride (brine), forming sodium bicarbonate (NaHCO₃) as a precipitate and ammonium chloride (NH₄Cl) in solution. NH₄HCO₃+NaCl→NaHCO₃↓+NH₄Cl

4. Precipitation and Filtration

• Sodium bicarbonate is only slightly soluble in water and precipitates out.
• The solid NaHCO₃ is then separated from the solution by filtration.

5. Washing and Drying

• The filtered sodium bicarbonate is washed to remove impurities (like ammonium chloride).
• It is then dried at controlled temperatures to produce the final white crystalline powder.

6. Recycling of Ammonia

• The leftover ammonium chloride is treated with lime (CaO) to regenerate ammonia gas, which is reused in the process, making the Solvay process economical and sustainable. 2NH₄Cl+Ca(OH)₂→2NH₃+CaCl₂+2H₂O

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