FOERFARANDE FOER GLOBAL UTVINNING AV URAN, YTTRIUM, TORIUM OCH SAELLSYNTA JORDARTSMETALLER UR FOSFATMALM INNEHAOLLANDE DESSA I SAMBAND MED FRAMSTAELLNING AV FOSFORSYRA ENLIGT DEN VAOTA METODEN.

摘要

The uranium, yttrium, thorium and rare earth values contained in a phosphate rock are essentially totally recovered therefrom by, during the wet-process preparation of phosphoric acid from said phosphate rock, acidulating same in the presence of aluminum and/or iron, and optionally silica, and thence recovering said values from the phosphoric acid thus produced.