For example here is an article in a Spanish newspaper.
The article smells very strongly, no, not for biased, but absolutely about the Russian. The result of the article - well, where are you without Russia!? Would they lie if the truth was reprinted in Russian media
https://inosmi.ru/20220531/resursy-254354103.html
By the way, there is not a word about the fact that Russian resources are the main raw material for all neon production in Ukraine. It only says that 1 out of 2 plants supplied products from the Russian steel industry. "Ukraine did not produce neon itself, but purified Russian - your words"? Maybe you didn't understand the question? Ok, I repeat once again - indicate a trustworthy source containing verified information that everything, as you indicated, Ukrainian production works on Russian raw materials, and without it it cannot produce neon? Did you mean that in your original post? If not, then there is no particular problem, only part of the raw materials for 1 plant "fell off", which can be compensated by supplies from other countries - Germany, Slovenia, Italy ... Or are there steel mills only in Russia?
I can only add, I stand by the truth in any situation, that Ukrainian companies, in some cases, partially used Russian raw materials, both for part of their needs, and on a contract basis, for Russian producers, performing post-treatment of primary raw materials (a by-product of metallurgy) . But Russian raw materials were not of any critical importance. By the way, you forgot to mention that the article says "Ukraine provides half of the world's neon supplies." Half is 50%, or do you think differently?
The plant located in Odessa will be launched. The plant in Mariupol, after being freed from terrorists, will also be put into operation - the country and business need money.
I am not ready to say how much the Neon plant suffered from terrorists, but if it cannot quickly enter into operation, it is possible that production will be increased in Odessa. Yes, there will be a noticeable decrease in supplies, but the world market will now perfectly understand that dealing with such terrorist suppliers as Russia should never be done again.
I also cannot say that I am the chief engineer of the neon production workshop, but there is a quite accessible procedure for obtaining neon from the by-products of metallurgical production. In fact, neon is not mined, it is one of the by-products that is formed as a result of the liquefaction and separation of ... simple air, in the metallurgical industry. The primary raw material is a neon-hel mixture, which is a by-product of the above process.
But the separation of helium and neon is carried out due to adsorption and condensation. The adsorption method is based on the ability of neon, unlike helium, to be adsorbed by activated carbon cooled with liquid nitrogen. The condensation method is based on neon freezing when the mixture is cooled.
It doesn't look like any toxic inhibitors or additives are used here, it's just that the production is very specific and the equipment is not cheap.