Author Topic: chloral hydrate  (Read 1220 times)

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stratosphere

  • Guest
chloral hydrate
« on: October 10, 2003, 02:55:00 PM »
i was wondering about making chloral hydrate in the following manor:

first prep and isolate ethanal by distillation off a ethnol/H20/HOCl soltn. ethanal boils at just a little over room temp.

then add the ethanal to a soltn of H20/NaOH about 3mols of NaOH/mol of ethanal.
then add to this a solutin of chlorine water with abit more then 3mols of Cl2 for every mol of ethanal.

some chloroform/formic acid would proboly be made as a byprouct, but these should be seperable by distllation.

finally the trichlroethanal would have to be hydrated, i don't know how this would best done.

adroit_synth

  • Guest
alternate OTC synth
« Reply #1 on: October 24, 2003, 10:57:00 AM »
Have you checked out this synth on Rhodium's site?

https://www.thevespiary.org/rhodium/Rhodium/chemistry/chloralhydrate.html


Might help.

stratosphere

  • Guest
i did see that, but it wasn't really what i...
« Reply #2 on: October 25, 2003, 01:03:00 PM »
i did see that, but it wasn't really what i wanted, it was brand specific as opposed to chemical specific, and it really didn't give much indication of the chemistry going on.

adroit_synth

  • Guest
my thoughts exactly
« Reply #3 on: October 26, 2003, 09:19:00 PM »
I was trying to convert the brand specific proportions to an exact mole ingredient and fell short without further knowledge of the products involved, and little enthusiasm to reasearch.

Rhodium

  • Guest
Chloral from ethanol or ethanal
« Reply #4 on: October 28, 2003, 08:26:00 AM »
Ethanol + Chlorine -> Chloral

Patent US2443183


Patent US2478152



Ethanal + Chlorine -> Chloral

Patent GB644914


Patent DE874303



Chlorine gas is prepared by acidification of sodium or calcium hypochlorite or KMnO4 oxidation of HCl, see my page for details.