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Topic: Separate mixture of benzoic acid and methanol  (Read 1553 times)

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Offline dolphinsea14

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Separate mixture of benzoic acid and methanol
« on: January 27, 2020, 08:04:17 AM »
How can I separate mixture of Benzoic Acid and Methanol?

Offline chenbeier

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Re: Separate mixture of benzoic acid and methanol
« Reply #1 on: January 27, 2020, 09:48:32 AM »
Neutralization, then destillation,

Offline dolphinsea14

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Re: Separate mixture of benzoic acid and methanol
« Reply #2 on: January 27, 2020, 11:56:42 AM »
By neutrallization benzoic acid will turn into salt and remain in water, and distillation will help to recover the methanol since it has lower boiling point?

Offline hollytara

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Re: Separate mixture of benzoic acid and methanol
« Reply #3 on: January 27, 2020, 12:02:24 PM »
You can probably just distill off the methanol - or use a rotovap.

The benzoic acid BP is much higher.

Offline dolphinsea14

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Re: Separate mixture of benzoic acid and methanol
« Reply #4 on: January 27, 2020, 12:22:10 PM »
Ok, thank you both hollytara and chenbeier, very much. I really appreciate your help.

Offline chenbeier

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Re: Separate mixture of benzoic acid and methanol
« Reply #5 on: January 27, 2020, 02:05:26 PM »
If not converted to the Salt, then probably you get benzoeic acid methyl ester, if try to distille.

Offline rolnor

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Re: Separate mixture of benzoic acid and methanol
« Reply #6 on: January 27, 2020, 03:51:24 PM »
If not converted to the Salt, then probably you get benzoeic acid methyl ester, if try to distille.

No, you need strong acid catalyst to make ester, benzoic avid is week acid.

Offline jeffmoonchop

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Re: Separate mixture of benzoic acid and methanol
« Reply #7 on: January 27, 2020, 05:11:24 PM »
Just evaporate off the methanol.

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