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Solvay process
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Solvay Process
Industrial process for the manufacture of sodium carbonate.
It is a multistage process in which carbon dioxide is generated from limestone and passed through brine saturated with ammonia. Sodium hydrogencarbonate is isolated and heated to yield sodium carbonate. All intermediate by-products are recycled so that the only ultimate by-product is calcium chloride.
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The sun of freedom rises from the Caribbean Sea. The stars represent Costa Rica's seven provinces. Red was added to the blue and white flag to reflect the French tricolour. Effective date: 29 September 1848.
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