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Chemistry Forums for Students => Organic Chemistry Forum => Organic Chemistry Forum for Graduate Students and Professionals => Topic started by: Discarnate on August 08, 2014, 09:51:56 AM

Title: Anhydride Dialkoxyamine Quench
Post by: Discarnate on August 08, 2014, 09:51:56 AM

I'm looking to run an experiment with an acid anhydride and diethanolamine. I understand that this will produce an exotherm and wanted to know if there is anything that I can drop in to quench the reaction if it gets out of hand! Not too bothered if I can't recover the RM's...

Cheers

Title: Re: Anhydride Dialkoxyamine Quench
Post by: baum0372 on August 08, 2014, 10:36:39 AM

Conceptually, anything that will quench the amine should slow/quench the reaction.  I'm not sure if adding a salt that can complex ethanolamine will do the trick?  Are you looking to stop the reaction just in case it gets too hot or for some analytical procedure?  If it's just in case, I'd suggest just diluting it in solvent.

Title: Re: Anhydride Dialkoxyamine Quench
Post by: Discarnate on August 08, 2014, 10:47:55 AM

Just something to kill the reaction, safety first! Thanks

Title: Re: Anhydride Dialkoxyamine Quench
Post by: discodermolide on August 08, 2014, 12:37:56 PM

Just keep control of the reaction temperature and the addition rate of the diethanolamine and you will be ok. Adjust the rate of addition so that you can maintain a temperature, say 10°C. Make sure it does not get too cold or the reaction may stop, and when you warm it it will suddenly restart.

Title: Re: Anhydride Dialkoxyamine Quench
Post by: Discarnate on August 11, 2014, 03:50:16 AM

Thanks, good to know