|Solvay process (ˈsɒlveɪ)|
|an industrial process for manufacturing sodium carbonate. Carbon dioxide is passed into a solution of sodium chloride saturated with ammonia. Sodium bicarbonate is precipitated and heated to form the carbonate|
|[C19: named after Ernest Solvay (1838--1922), Belgian chemist who invented a process using salt, limestone, and ammonia]|
|Solvay process (sŏl'vā, sôl-vā') Pronunciation Key
A process used to produce large quantities of sodium carbonate. In the Solvay process, salt (sodium chloride) is treated with ammonia and then carbon dioxide, producing sodium bicarbonate and ammonium chloride. The ammonium chloride is usually combined with lime to produce ammonia (recycled for reuse) and calcium chloride.