Solvay process

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Solvay process

[for Ernest SolvaySolvay, Ernest
, 1838–1922, Belgian industrial chemist and philanthropist. He originated the Solvay process and established (1863) near Charleroi, Belgium, the first plant for making soda by this process; later, plants were set up in many countries.
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], commercial process for the manufacture of sodium carbonate (washing soda). Ammonia and carbon dioxide are passed into a saturated sodium chloride solution to form soluble ammonium hydrogen carbonate, which reacts with the sodium chloride to form soluble ammonium chloride and a precipitate of sodium hydrogen carbonate (sodium bicarbonate) if the temperature is maintained below 15°C;. The sodium hydrogen carbonate is filtered off and heated to produce sodium carbonate.

Solvay process

[′säl‚vā ‚prä·səs]
(chemical engineering)
The process to make sodium carbonate and calcium chloride by treating sodium chloride with ammonia and carbon dioxide.