The TIROS project has TiO2 by the way. So whilst they are using PH4 like the rest but needing to do that at temp, what is the value of the TiO2 if you are then going to crap on about higher capex - including gravity separation - and opex costs due to heating?? It is all a balancing act now wouldn't you say - that table you posted is therefore very misleading. All are using PH4 by the way, so the temperature for TIROS (instead of room temperature) relates to the extraction method for the REEs and TiO2 as temperature is need to ensure you can produce the different streams and TiO2. If you don't separate via temperature then you don't have a product to sell.
To be frank, having two products - TiO2 and REEs - might put that project ahead of the pack in terms of economic development assuming their claims of resource size and homogenuity are met. So I wouldn't be crapping on TIROS as much as you are doing at this stage. I will leave it at that.
* had a few articles on this project as well - just type the article below in
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