Solvay Appoints New Head for Soda Ash January 6, 2021 Solvay SA of Belgium has appointed Philippe Kehren, currently head of soda ash Europe, as president of its global business unit Soda Ash & Derivatives. He was previously head of Soda Ash Europe. Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window)