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Topic: sodium hydroxide elimination  (Read 2260 times)

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Offline gkasparis

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sodium hydroxide elimination
« on: April 20, 2016, 01:35:13 PM »
Hi all

How could I eliminate sodium hydroxide from a solution of sodium decanoate and sodium hydroxide. You see i am trying to synthesise a series of fatty acid salts from their parent acids and sodium hydroxide.

Thank you
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Offline kriggy

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Re: sodium hydroxide elimination
« Reply #1 on: April 20, 2016, 03:27:45 PM »
I think your salt will have rather low solubility in water compared to hydroxide so you could possibly extract it away
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Offline Dan

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Re: sodium hydroxide elimination
« Reply #2 on: April 22, 2016, 02:47:02 AM »
It would be easier to remove an excess of the carboxylic acid than an excess of NaOH; if you use NaOH as the limiting reagent, the excess carboxylic acid is easily removed by washing.
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Offline gkasparis

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Re: sodium hydroxide elimination
« Reply #3 on: April 23, 2016, 08:00:19 PM »
The salt is water dispersible, it forms micelles. An excess of acid would indeed solve most of the problems.

Thanks for your replies
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Offline orgopete

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Re: sodium hydroxide elimination
« Reply #4 on: April 24, 2016, 12:23:28 AM »
Adjust the pH after hydrolysis?
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