stratosphere (Stranger)
10-10-03 14:55
No 463850
      chloral hydrate     

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
(Stranger)
10-24-03 10:57
No 466552
      alternate OTC synth     

Have you checked out this synth on Rhodium's site?
../rhodium /chloralhydrate.html
Might help.
 
 
 
 
    stratosphere
(Hive Bee)
10-25-03 13:03
No 466721
      i did see that, but it wasn't really what i...     

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
(Stranger)
10-26-03 21:19
No 466963
      my thoughts exactly     

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
(Chief Bee)
10-28-03 08:26
No 467296
      Chloral from ethanol or ethanal
(Rated as: good read)
    

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.