קיים תהליך נוסף להפקת אורניום מעפרת האורניום בצורת UO2 (NO3) 2 על ידי המסת עפרות האורניום בחומצה חנקתית ותמצית אורניום באמצעות תמיסת 20% של טריבוטיל פוספט / דודקאן. TBP יוצר קומפלקס חזק עם חנקת אורניום וכך תוכלו להסיר אורניום בקלות מזיהומים אחרים. ניתן להמיר UO2 (NO3) 2 שהושג בקלות ל- (NH4) 2U2O7 על ידי תגובה עם אמוניה ולבסוף הפחתה עם מימן נתנה לך UO2. אינך יכול להשיג אורניום טהור מכיוון שהוא רגיש לחמצון בקלות.

From theoretical perspective:

For a long time elemental uranium wasn't known. Scientists tried to heat the ore with carbon, but the result was uranium carbide, not uranium. Eventually it was obtained by first into UO$_2$(NO$_3$)$_2$ and then to UO2 and then reduction with hydrogen gas.

From practical perspective (I would assume you want to make a nuke):

Uranium ore is a strategic resource and is well guarded. Mines always belong to someone and guards are dead serious there. If they catch you - you are in trouble. Uranium ore is dangerous. Not even because of decay of U (it lives billions of years), but because of the product of it's decay. You will get a dose of radiation if you are not well equipped.

Even if you succeed, you will blow yourself up when trying to reduce it in the flow of hydrogen at 500C. This will be a simple chemical explosion, you will be cut by shattered glass and cleaning of the place from radioactive contamination is expensive. In US they will take away your house because loan contract says that you promise not to do it at home. Seriously.

Finally, if you magically get pure uranium it is quite useless. You now need to extract $^{235}$U, or, better, turn some into Pu$^{239}$. There is zero chance to succeed in it. It took US 3 years, an army o0f engineers and 1 billion dollars (back then it was a lot more than now) to get the first nuke.