deionize
deionise BrE

Mercury ions deionize slowly, limiting the switching speed of mercury-filled thyratrons.

"If you could slice through that envelope with a laser, I'll bet you could deionize them pretty good-besides, that envelope has to hold their life support, whatever it is they metabolize."

Health fanatics in San Francisco would show you the device they had to deionize the air, they'd drink nothing but water melted from subterranean ice caverns, they'd serve you a meal consisting solely of steamed desert-grown kale, and finish off with this really superior cocaine studded with little yellow dots.