I want to synthesize 9,10-diphenylanthracene. It uses phenyllithium and must be conducted under an inert atmosphere. I don’t have nitrogen or pure
argon but I have a tank of welding argon that is 15% CO2 according to the MSDS. I want to try scrubbing out the CO2 with several sodium hydroxide
washes and then drying it over sodium hydroxide. I was wondering if anyone has any experience with this or has tried it before?
[Edited on 17-7-2012 by Mercedesbenzene]DoctorOfPhilosophy - 17-7-2012 at 10:06
I don't know about other places, but at my local welding store they'll exchange Ar/CO2 for 99% Ar. Of course if you really need very pure Ar it's a
moot point. Scrubbing is going to be messy and contaminate your mix with water vapor, have you considered a cold trap?Pyro - 17-7-2012 at 10:19
is CO2 not inert enough for you?
it doesn't react with muchmr.crow - 17-7-2012 at 10:30
is CO2 not inert enough for you?
it doesn't react with much
Phenyllithium will
Also CO2 will react with NaOH to make Na2CO3 for example (in solution it forms carbonic acid)Pyro - 17-7-2012 at 10:50
oh,
I suggest trading in the bottle for pure argon, over here they have both pure and Ar/CO2 in many different sizes.
do you know of a welding shop in your area?Mercedesbenzene - 18-7-2012 at 10:42
For the sake of science I am going to try it on a very small scale. If it does not work then I will trade in my tank for a tank of 99% argon.Gibberator - 23-7-2012 at 22:57
Run it through an aqueous solution of CaNO3 or some other Alkaline Earth nitrate? Wouldn't it precipitate out as the Alkaline Earth carbonate?
