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Author: Subject: Synthesis of dichloromethane- question mark.
teodor
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[*] posted on 23-12-2021 at 12:37


Chemplayer has a video about the preparation of chloroform from trichloroacetic acid. So, I am wondering, could a similar method be used to make DCM from dichloroacetic acid. And yes, this is only a theoretical question. I also see no point to synthesise DCM yet.
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macckone
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[*] posted on 24-12-2021 at 14:00


Haloform reactions generally require the alpha carbon be fully chlorinated.
But if you can make chloroform, you can use it to make DCM.
Yes it is tedious but it is a documented method.
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Triflic Acid
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[*] posted on 25-12-2021 at 16:26


@Texium, I also should have been more clear. When I said on-tap, I was referring to an easy to set up a system that could produce chlorinate solvents slowly over time, not an in-flow system. Using TCCA+H2O as a slow-release chlorine generator, this would produce a slow-release chlorine system, not as rapid as HCl + TCCA. I also should have specified that my reactor would not be nearly big enough for this, but that the OP could try to get a larger vessel to produce more industrial quantities. While a flow based system might be more effective, something like this https://pubs.rsc.org/en/content/articlepdf/2017/re/c6re00186... is much harder for an amateur to set up. Overall, I don't blame you for getting annoyed at me, as, looking back, I've honestly posted a bunch of un-specific shit.



Hope is not a reagent
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Neal
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[*] posted on 26-12-2021 at 08:57


Yo some years ago I was asking chemistry professors what are some chemicals to remove oil from keyboards? I tried all the stuff from the stores they didn't work, until I heard from a biochemistry professor that the oil from our finger tips is likely a fatty acid, then an organic professor said try dichloromethane.

Now I wanna know to try to buy it. I think in higher concentrations, DCM is like a syrupy liquid, but at lower concentrations, more fluid like water? Does Home Depot still sell something with them in the U.S.?
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karolus28
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[*] posted on 26-12-2021 at 09:35


Quote: Originally posted by Neel  
I think in higher concentrations, DCM is like a syrupy liquid


no, it's kinda like alcohol




Hi, please read about exif data.
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Metallophile
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[*] posted on 26-12-2021 at 10:35


DCM doesn't have a concentration. It's a pure solvent, and it boils at 40C. I got 1 liter on Amazon for about $60, but I'm sure there are better deals out there.

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Neal
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[*] posted on 26-12-2021 at 12:27


Quote: Originally posted by karolus28  
Quote: Originally posted by Neal  
I think in higher concentrations, DCM is like a syrupy liquid


no, it's kinda like alcohol

Ah you're right, I was looking at this video, the syrupy part is DCM mixed with something else. https://www.youtube.com/watch?v=QdgpehUX3wU
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macckone
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[*] posted on 30-12-2021 at 16:42


DCM is no longer available in 'consumer products' in the USA.
You can buy it from places like

https://www.sciencecompany.com/Dichloromethane-4L-Reagent-AC...

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