In soda ash manufacturing via the Solvay procedure, the secondary product is____________________?
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Answer: A. CaCl2
Explanation
Calcium chloride is produced as a major secondary byproduct during the regeneration of ammonia in the Solvay soda ash process. The Solvay procedure reacts sodium chloride, ammonia, and carbon dioxide to precipitate sodium bicarbonate. Ammonia recovery requires reacting ammonium chloride with lime, generating calcium chloride as a waste byproduct. Soda ash is the common industrial name for sodium carbonate, a vital raw material for glass manufacturing. The Solvay process is celebrated for recycling its ammonia reagent efficiently within closed industrial loops. Chemical byproduct management remains an important economic and environmental factor in soda ash production.
Option B suggests ammonium chloride, which is an intermediate reagent recycled rather than a final byproduct. Option C names ammonia, which is recovered and reused internally within the continuous Solvay chemical loop. Option D proposes sodium hydroxide, which is produced via chlor-alkali electrolysis rather than the Solvay method.
- Subject
- Engineering
- Category
- Chemical Engineering
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- —
- Difficulty
- medium
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