Ann: Andromeda signs HPA MoU with AEM Technologies, page-176

A worth while read, link to a recent paper on HPA market published 6th June 2021, titled "High Purity Alumina – Current and Future Production"

https://doi.org/10.1080/08827508.2021.1937150

ABSTRACT
This paper provides and overview of current and emerging processes to produce high purity alumina, HPA. Strong demand for HPA is projected to continue for the coming decade at least, driven by its critical role in the manufacture of LEDs and Li-Ion battery separators which require 4N (99.99% Al2O3) purity. The current selling price of 4N HPA is over $20,000/t. Most HPA is currently produced from high purity aluminum, a very expensive feedstock. Under these conditions there is considerable interest in new production from lower cost starting materials, including SGA, Bayer process ‘hydrate’, alumino-silicate clays, and other aluminous minerals.

Of particular interest is table 4 in the conclusion which identifies AEM (through Orbite Quebec, Canada) as the leader of the emerging producers using the most promising route to HPA from Bayer hydrate (ATH) or clay is the ACH process. ADN also appears on the list at the bottom but with the recent MOU announcement we can now move ADN to the top of the list with AEM. Exciting times ahead