Re: Prep of N,N-diethylarylamines?
- From: "Ron Jones" <ron@xxxxxxxxxxxxxxx>
- Date: Mon, 2 Jun 2008 19:56:34 +0100
BAJJERFAN wrote:
On May 30, 5:32 pm, nico...@xxxxxxxxxxxx wrote:
On May 29, 2:52 pm, BAJJERFAN <BAJJER...@xxxxxxx>
I assume there is little danger of a reaction getting out of
hand but just want to be sure.
If your reaction is not sufficiently exothermic to necessitate
cooling at some scale of reaction then your reaction is not likely
to proceed spontaneously. The only endothermic reaction that proceed
spontaneously are entropically driven by some sort of phase change.
Do you have much experience with chemical reactions to warrant a
chemical engineering pint of view? Start with small reaction size
first and learn from your mistakes
Thanks for the info. It sounds from the procedure that one just mixes
and heats. Prolly ok on a lab scale. If it works of course scaleup is
a consideration along with price. Just trying to anticipate problems
in advance. There is also a procedure that might work which involves
heating the anhydrous arylamine hydrochloride with ethanol at elevated
temperatures, but this might limit your choice of an outside source
since not very may places have the equipment to do this on a large
scale.
If I had a pound for every prep I have seen that said "add all the
ingredients and cook", then I could retire now. I've seen mole preps on a
lab scale that look OK, but would cause a huge excursion on plant.
--
Ron Jones
Process Safety & Development Specialist
Don't repeat history, unreported chemical lab/plant near misses at
http://www.crhf.org.uk Only two things are certain: The universe and
human stupidity; and I'm not certain about the universe. ~ Albert
Einstein
.
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