Pearlhill Technologies has unique specialized capability for fluorine extraction from depleted uranium tetrafluoride (DUF4, a “green salt”). DUF4 is obtainable from chemical processing of depleted hexafluoride (DUF6) that is a product of uranium isotopic enrichment plants (UIEPs). Pearlhill employs new, environmentally and economically sound processes in our patents for the production of nonmetallic inorganic fluorides from uranium tetrafluoride (NIFUT), including sulfur tetrafluoride (SF4), sulfur hexafluoride (SF6), and nitrogen trifluoride (NF3) gases.