First question ever asked, so apologies if I've done this incorrectly!
My current predicament: characters in 1931 Las Vegas are looking to get their hands on some neon/argon (for use in neon signs). I'm wondering where, realistically, they might be able to obtain some. Is it conceivable that they would be able to create some themselves via fractional distillation if they had adequate equipment? Or would a whole air separation plant be required to create enough neon? One character is a chemist with experience redistilling industrial alcohol to make it potable during the Prohibition period; would any of this experience translate at all to distilling gasses?
This is also happening while the construction of Hoover Dam is going on -- would there be any equipment or resources at the construction site that might be of use?
I've looked into Georges Claude and his air liquefaction business, plus the history of neon and the construction process of Hoover dam, and while I've learned a lot more than I first knew, I'm still lacking the specifics of exactly how this process was performed with 1931 technology. Grateful for any resources you can point me towards, huge thanks for helping me out with this!