Ok, I guess I have to drop this idea.
Reason why I want to try this is, I have probably +20 liters left of 97% IPA from a 30 liters container, bought from an industrial surplus material shop many years ago, maybe its near a decade.
I've been using it all this time for years, transferred to smaller bottles or containers, most to bigger glass bottles as buffer stock rather than have to pour from that big heavy container, and most frequent used is in my plastic squeeze bottle for cleaning flux or washing/spraying pcb. I've emphasized this at 1st post, its not for human consumption or anything else,
only for electronics.
I remembered that when it was new, when accidentally spilled over my glass table, it evaporated quite fast like dried almost instantly and without any wet residue, nowadays, the spill dried much slowly, and pretty sure, it left some wet residues which I assumed its water, it will dry eventually exactly like water, but took sometimes.
At some cases, when washing my PCBs, I had to use hair dryer to dry it completely, which was not needed in the past when the IPA was fresh.
I can afford to buy new batch of 30 liters of IPA, its just don't like the idea to dispose that +20 liters, and have been thinking if there is an "easy & cheap" way to improve it's dryness, thats all.
Please don't suggest those unsual or maybe expensive "molecular sieve" and etc .. its not my intention.
Btw, my silica is in bead form, not powder form, exactly like this below, and I live in tropical high humidity area, exposed silica gel like below in open air, will turned into pink in just few hours.
Random image from Google
Thanks for replying.