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.
References in periodicals archive ?
Sodium bicarbonate is precipitated, and then filtered, dried and calcined to soda ash as in Solvay process discussed above.
Simultaneously, the present obsolete technology shall also be replaced with the Standard Solvay Process which is in vogue the world over.