PUREX Solvent Extraction Cascade

PUREX Cascade

Cascade stages 4

Cascade status

Feed loaded — press Start extraction.

Stage

0 / 4

U → organic

Pu → organic

FP in raffinate

100%

Legend

● UO₂²⁺ (uranyl) ● Pu⁴⁺ ● fission products
▬ organic: TBP/kerosene ▬ aqueous: HNO₃ feed
Each stage mixes the two phases, lets them settle, then the raffinate (aqueous) advances to the next stage. U/Pu partition into the organic phase by forming neutral nitrate–TBP complexes; fission products stay ionic and aqueous.

Organic phase (TBP/kerosene) Aqueous phase (HNO₃) Uranium (UO₂²⁺) Plutonium (Pu⁴⁺) Fission products

aqueous feed →
← fresh organic

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