<P> The Solvay process or ammonia - soda process is the major industrial process for the production of sodium carbonate ( soda ash , Na CO ) . The ammonia - soda process was developed into its modern form by Ernest Solvay during the 1860s . The ingredients for this are readily available and inexpensive : salt brine ( from inland sources or from the sea ) and limestone ( from quarries ) . The worldwide production of soda ash in 2005 has been estimated at 42 million metric tons , which is more than six kilograms ( 13 lb ) per year for each person on Earth . Solvay - based chemical plants now produce roughly three - quarters of this supply , with the remainder being mined from natural deposits . The method superseded Leblanc process . </P>
<P> The Solvay process or ammonia - soda process is the major industrial process for the production of sodium carbonate ( soda ash , Na CO ) . The ammonia - soda process was developed into its modern form by Ernest Solvay during the 1860s . The ingredients for this are readily available and inexpensive : salt brine ( from inland sources or from the sea ) and limestone ( from quarries ) . The worldwide production of soda ash in 2005 has been estimated at 42 million metric tons , which is more than six kilograms ( 13 lb ) per year for each person on Earth . Solvay - based chemical plants now produce roughly three - quarters of this supply , with the remainder being mined from natural deposits . The method superseded Leblanc process . </P>
name the raw material used in the manufacture of sodium carbonate by solvay process
name the raw material used in the manufacture of sodium carbonate by solvay process
salt brine limestone
salt brine limestone