I have seen HCl, H2SO4 even HNO3 used, even acetic acid with...

I have seen HCl, H2SO4 even HNO3 used, even acetic acid with eudialyte so what ,the point you don't seam to want to understand is that tanbreez will not be using acid in greenland. One of many reason for that was the problems that MP had with freezing pipes, they found even a door left open could freeze a pipe that had heating , the result was up to 3 months down production as they had multiple sx cells and precipitate blocking etc
secondly as i have said before any REE cons produced in greenland is liable to a 100% import duty to china
again it is time to concentrate on etm rather than continual untruths about a success next door as it appears none of these problems have been looked at