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Topic: Acetone Synthesis  (Read 30520 times)

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Offline constant thinker

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Acetone Synthesis
« on: December 01, 2005, 08:47:12 PM »
This stems off of
http://www.chemicalforums.com/index.php?board=9;action=display;threadid=5979

So you can make acetone from isopropyl alcohol. This would liberate water. I'm going to try this.

Basically from this post it's:
C3H8O1 + H2O2 -> 2 H2O + C3H6O1

Correct anything if it's wrong please. :)
I'm going to try this as soon as I get a chance to go to the store. How will I able to detect acetone. Isopropanol is flammable also. Smelling isn't a prefered option.


Would this be considered a Dehydration Reaction?
« Last Edit: December 01, 2005, 08:49:05 PM by constant thinker »
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Offline limpet chicken

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Re:Acetone Synthesis
« Reply #1 on: December 01, 2005, 09:52:49 PM »
I would use much stronger peroxide, although STRICTLY avoid adding any peroxide with acid in it (OTC stuff has phosphoric acid mixed in with it over here)

Acid would catalyse formation of dimeric or trimeric acetone peroxide, which is unstable in the extreme and likely to explode with great violence.

You can detect acetone by its smell, which is quite different to that of propanol or isopropanol.
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Offline Mitch

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Re:Acetone Synthesis
« Reply #2 on: December 02, 2005, 12:40:19 AM »
You can buy acetone. Why synthesize it?
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Offline constant thinker

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Re:Acetone Synthesis
« Reply #3 on: December 02, 2005, 05:11:48 PM »
It's more fun to synthesise. I already have acetone in my house. It goes by the name of Nail Polish remover. Not pure I know.
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Offline Borek

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Re:Acetone Synthesis
« Reply #4 on: December 02, 2005, 06:10:38 PM »
Quote from: constant thinker on December 02, 2005, 05:11:48 PM
I already have acetone in my house. It goes by the name of Nail Polish remover.
It could be acetone, it could be not - depends. There are polish nail removers acetone free.
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Offline constant thinker

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Re:Acetone Synthesis
« Reply #5 on: December 02, 2005, 10:01:46 PM »
Yes I know. I already checked the bottle on multiple occasions.
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Re:Acetone Synthesis
« Reply #6 on: December 03, 2005, 04:52:49 AM »
I Could be wrong here, but I see to remember reading somewhere that electrolysis of citric acid soln will create acetone also, although how you extract it afterwards wasn`t mentioned.
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Offline limpet chicken

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Re:Acetone Synthesis
« Reply #7 on: December 03, 2005, 07:47:45 PM »
Never trust OTC solvents, ALWAYS make sure to do an evaporation test before use, and distill over a drying agent into a storage container.

OTC solvents are so often full of s#*$, I was recently sold a bottle of "pure acetone" OTC from the  local pharmacy, and it, on sitting with anhydrous MgSO4, lost around 10% of its weight, which was f&#^$*@ water >:(
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Offline Alberto_Kravina

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Re:Acetone Synthesis
« Reply #8 on: December 04, 2005, 04:05:13 AM »
You are completely right limpet chicken!
Some months ago I bought "pure" ethanol to make the reaction of metallic sodium with ethanol, and it lost about 4% of it's weight with anhydrous Sodium sulfate (commercial concentrated ethanol has a concentration of about 96%, but the label on the bottle said 100%!), mabye the guys in the pharmacy confused it .  >:( >:(Fortunately I made this water test BEFORE I made the reaction with sodium.
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Offline billnotgatez

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Re:Acetone Synthesis
« Reply #9 on: December 04, 2005, 05:21:43 AM »
Alberto_Kravina –
How did you remove the water so as to continue with your experiments?
Regards,
Bill
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Offline limpet chicken

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Re:Acetone Synthesis
« Reply #10 on: December 04, 2005, 02:00:27 PM »
Alberto, that could have been really nasty, (and really expensive to boot!), if you were trying to make alkoxides via Na metal and EtOH, but jesus christ, throwing a lump of sodium into hydrous alcohol, thats a recipe for a crispy fried face :o


I have read, however, that is is perfectly practical to prepare group I alkoxides through adding the anhydrous hydroxide of the metal to the relevant anhydrous alcohol, the alkoxide layer being able to be siphoned off, it works, I use that method to prepare NaOMe, which I use to clean out my glass hash pipe, it burns the resin right off, no matter how baked on, from months of use that it may be ;D

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Offline Alberto_Kravina

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Re:Acetone Synthesis
« Reply #11 on: December 04, 2005, 02:05:02 PM »
I didn't make the reaction with sodium with the ethanol with the 96% EtOH, I bought a new bottle of "pure" ethanol
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Re:Acetone Synthesis
« Reply #12 on: December 04, 2005, 02:06:36 PM »
Is it possible to create acetone in oxidizing 2-propanol with KMnO4?
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Offline Alberto_Kravina

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Re:Acetone Synthesis
« Reply #13 on: December 04, 2005, 02:07:57 PM »
Yes I think this is possible because potassium permanganate is a strong oxidizing agent.  :)
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Offline billnotgatez

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Re:Acetone Synthesis
« Reply #14 on: December 04, 2005, 02:28:05 PM »
 Alberto_Kravina –
How did you pure ethanol or was it denatured?
Regards,
Bill
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