The value of Zeolite's has been discussed in company presentations many times.
As for your other questions....my understanding is any plants would be on-site at Lithium miners processing facilities....I doubt ZEO would be doing deals where they pay for them.
More likely that they get fees...ongoing payments, licensing, fee per tonne processed etc.
ZEO Price at posting:
5.0¢ Sentiment: Buy Disclosure: Held
A personalised tool to help users track selected stocks. Delivering real-time notifications on price updates, announcements, and performance stats on each to help make informed investment decisions.
(20min delay)