Ernest Gaston Joseph Solvay (French: [s?lv?]; 16 April 1838 – 26 May 1922) was a Belgian chemist, industrialist and philanthropist.
Born at Rebecq, he was prevented by acute pleurisy from going to university.
He worked in his uncle's chemical factory from the age of 21.
In 1861, he developed the ammonia-soda process for the manufacturing of soda ash (anhydrous sodium carbonate) from brine (as a source of sodium chloride) and limestone (as a source of calcium carbonate).
The process was an improvement over the earlier Leblanc process.
He founded the company Solvay & Cie and established his first factory at Couillet (now merged into Charleroi, Belgium) in 1863 and further perfected the process until 1872, when he patented it.
Soon, Solvay process plants were established in the United Kingdom, the United States, Germany and Austria.
A later conference would include Niels Bohr, Werner Heisenberg, Max Born, and Erwin Schrödinger.
He was twice elected to the Belgian Senate for the Liberal Party and granted honorary title of Minister of State at the end of his life.
Solvay, New York and Rosignano Solvay, the locations of the first Solvay process plants in the United States and in Italy, are also named after him.
Solvay died at Ixelles at the age of 84 and is interred there in the Ixelles Cemetery.