Whats the purpose of the argon fill? just to ward off attack from free radicals etc. formed via photolytic processes, or some specific thermal properties?
I really wish it were practical for me to get myself a full-sized tank or two (plus tanks of chlorine gas, anhydrous ammonia, hydrogen bromide, HCl gas, and hydrogen, those are probably what would be the other first couple on my wish-list), but unfortunately the companies rent the tanks out, and my usage pattern is 'as and when'. so it'd mean a massive amount of downtime when the tanks aren't being used. As a result I tend to go via welding stores and go for 'takeout' size cylinders. Although they don't do the likes of chlorine, ammonia, and at least the local ones don't do H2, although I was somewhat hoping originally that they'd have hydrogen, for use in oxyhydrogen cutting torches etc. (I've a far different range of uses mind you, catalytic reduction via hydrogenation over various high surface area platinum-group metals or nickel catalysts is very, very clean as a reduction method, but it does need high pressure for many catalysts and processes, not all but a lot of them you really do need both a compressed cylinder of H2, and a pressure vessell commonly referred to as a 'parr bottle' or 'pressure bomb' (bearing no relations to actual bombs, of the sort that fr.ex a bomber aircraft would drop on a target, barring maybe facetiousness regarding critical failures of equipment, the likes of a highly flammable gas and potentially pyrophoric catalyst [some of the Raney nickels, and the Rieke metals are fine enough to bust into flames pretty easily, especially Rieke metals] being stuffed in a bottle together)
The equipment is expensive as hell to buy, out of my price range, so I'd have to do some custom work and make my own, likely using disposable bottles (like my ever growing collection of empty argon cylinders) due to hydrogen embrittlement risk, and structural failure. H2 penetrates many metals and renders them more brittle), otherwise the bare bones of such a DIY job, are means to replace the tank, if it isn't given a glass liner (which I can manage easily enough), pressure gauges, a stand for it, and mechanical rocking arms that swirl the reaction mixture around in a way that ensures maximum contact with the hydrogen, plus of course means to access the inside of the thing to insert and remove contents. If building one though I'll personally add in as a safety precaution, a goodly thickness of welded metal mesh, like a sleeve to go over it that can be removed for access, to restrain fragmentation in case of a critical failure.
Good news so far-got some excellent and most interesting information regarding a certain synthetic opioid I have interests in, including a report of a human voluntarily selfadministering the compound and reporting on things such as dosage, route of administration, duration of action, secondary effects and more besides.
