http://www.essentialchemicalindustry.org
This example link is to an article on Sodium Carbonate:
http://www.essentialchemicalindustry.org/chemicals/sodium-carbonate.html
Here's their schematic of the Solvay Process for producing Sodium Carbonate from limestone and brine:
(Original image NOT clipped at right-hand margin... Shows Sodium Carbonate(s) and Calcium Chloride(aq) as products)
Dave Z