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Topic: Why doesn't exist 2-butanone, anhydrous?  (Read 3451 times)

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Offline beapkman

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Why doesn't exist 2-butanone, anhydrous?
« on: February 04, 2013, 08:09:21 AM »
Hi, I'm finding 2-butanone, anhydrous solvent.

It is important to use the anhydrous solvent which doesn't contain the water molecules.

However, I have never seen the anhydrous solvent of 2-butanone.

Can't it exist?

Offline Dan

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Re: Why doesn't exist 2-butanone, anhydrous?
« Reply #1 on: February 04, 2013, 08:25:59 AM »
You can get it <0.1% water - HPLC grade is pretty dry. Example.

What are you using it for? Does it need to be drier than that?
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Offline OC pro

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Re: Why doesn't exist 2-butanone, anhydrous?
« Reply #2 on: February 04, 2013, 10:10:40 AM »
@beapkman: Distill it by yourself lazy fellow. For research purpose and small scale I always would recommend tom purify/dry the things on your own to be on the safe side. A well-trained chemist should know how to do this.

Offline beapkman

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Re: Why doesn't exist 2-butanone, anhydrous?
« Reply #3 on: February 05, 2013, 11:08:26 PM »
Thank you for your cooperation.

Is there any way to purify the solvent?

All I know is just to boil the solvent until the water vapor is evaporated.

However, the b.p of 2-butanone is just about 80.

Offline discodermolide

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Re: Why doesn't exist 2-butanone, anhydrous?
« Reply #4 on: February 06, 2013, 01:17:15 AM »
You can purify it by distillation, see http://en.wikipedia.org/wiki/Distillation
There is a picture of the apparatus you can use.
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Offline curiouscat

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Re: Why doesn't exist 2-butanone, anhydrous?
« Reply #5 on: February 06, 2013, 04:09:38 AM »
Thank you for your cooperation.

Is there any way to purify the solvent?

All I know is just to boil the solvent until the water vapor is evaporated.

However, the b.p of 2-butanone is just about 80.

80 = 100 - 20

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