The easiest way is probably to just heat them under dry nitrogen or (even better) vacuum.

Assuming it's not soluble, you could dump in some solvent with a water azeotrope and distill it off.

[removed]

[removed]

I'm concerned that it would be irresponsible to answer your question because you might attempt some of these methods. A few days ago you were asking whether it was a good idea to dry your pantry by pouring sodium hydroxide into a corner. (Just to be clear, the answer is NO.)

These substances can be safely dried by people with appropriate equipment, knowledge, common sense, and oversight. You have demonstrated none of these. If you attempt to dry sodium hydroxide at home, by any method, you will create a damaging chemical accident. If you are interested in chemistry, and you enjoy having an intact home, two functional eyes, and a clean criminal record, please stop asking these questions on Reddit and go take a class at your local community college, or anywhere else that you can receive the education you need in a safe and supervised environment.

[removed]

Ouch. I wasn't aware of OP's prior question.

I absolutely agree. Don't be messing around with sodium hydroxide if you don't know what you're doing...and your question demonstrates that you don't.

Contact with NaOH will eat through your skin, or blind your eyes. It'll chew through many things you might use to hold it.

Buy some silica gel packs if you want to dry an area. They're cheap and safe.

I didn't ask this for sodium hydroxide. Anyway, thx