The Frasch process is used to extract what chemical element from underground deposits?
Frasch process this method, the United States produced 3.89 million tons of sulfur in 1989, and Mexico produced 1.02 million tons of sulfur in 1991. The Frasch process can be used for deposits 50–800 meters deep. 3-38 cubic meters of superheated water are required to produce every tonne of sulfur, and the associated energy cost is significant. A working demonstration model of the Frasch process suitable for the classroom has been described. Frasch process The Frasch process is a method to extract sulphur from underground deposits. It is the only industrial method of recovering sulphur from elemental deposits. Most of the world's
Regolith-hosted rare earth element deposits to decompose and extract REEs. Chemical leaching is used to extract REEs in regolith-hosted REE deposits. By injecting leaching solution (lixiviant) to an orebody, REEs adhered to clay minerals are displaced by the ions of the leaching solution and dissolve into the leaching solution, which flows downward along the orebody. The equation below shows an example of ion-exchange reaction between REE-adhered clay mineral and lixiviant (metal sulphate). <chem>2 Clay-REE + 3 M2SO4 -> 2 Clay-M3 + REE2(SO4)3</chem> Since the discovery of this type of deposits in 1960s, leaching procedure has experienced three successive generations of technology, evolution in the use