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Chemistry Forums for Students => Inorganic Chemistry Forum => Topic started by: acid_man on December 27, 2009, 09:48:32 AM

Title: Can you get NaOH by this
Post by: acid_man on December 27, 2009, 09:48:32 AM

CaO + H2O = Ca(OH)2
Ca(OH)2 + Na2CO3 = NaOH + CaCO3

Title: Re: Can you get NaOH by this
Post by: AWK on December 28, 2009, 02:01:09 AM

THis is a method uses in Solvay plants
see: http://fr.wikipedia.org/wiki/Hydroxyde_de_sodium
under: À partir de carbonate de sodium
Unfortunately the english Wikipedia omitted this process

Title: Re: Can you get NaOH by this
Post by: Fleaker on December 29, 2009, 03:38:26 PM

Yes, that is a well-known process.

I think it's second most used after chlor-alkali.

Title: Re: Can you get NaOH by this
Post by: aieeee on January 13, 2010, 01:36:45 AM

won't there be a problem separating the products as Na2CO3 is also soluble in aqueous medium ?

Title: Re: Can you get NaOH by this
Post by: AWK on January 13, 2010, 03:51:30 AM

Quote from: aieeee on January 13, 2010, 01:36:45 AM

won't there be a problem separating the products as Na2CO3 is also soluble in aqueous medium ?

You should add just a stoichiometric amount of sodium carbonate and you question is irrelevant.