The possibility of processing the spent extractant of the PUREX-process by thermochemical decomposition of tributyl phosphate (TBP) to hydrocarbons and phosphoric acid was investigated. It was shown that the main condition for the intensive and complete decomposition of TBP is the presence of free phosphoric acid in the system, which ensures the course of the process in an autocatalytic mode. This is observed at a molar ratio of H₃PO₄: TBP > 2: 1 and can be achieved in the technological process using recycled phosphoric acid. Under these conditions, at a temperature of 190–200 °C, the decomposition of TBP proceeds quantitatively within 5–10 min. It was found that the process proceeds with the formation of butene and a large amount of alkanes and alkenes of various molecular weights, which is caused by secondary processes of polymerization and cyclization of decomposition products catalyzed by excess phosphoric acid. During the decomposition of TBP, radioactive impurities pass into the phosphoric acid phase, which creates the possibility of their neutralization and disposal in the form of phosphate glasses.

研究了通过将磷酸三丁酯 (TBP) 热化学分解为碳氢化合物和磷酸来处理 PUREX 工艺的废萃取剂的可能性。结果表明，TBP 充分和完全分解的主要条件是系统中存在游离磷酸，这确保了该过程以自催化模式进行。_{这在 H 3} PO ₄的摩尔比下观察到: TBP > 2: 1 并且可以在使用回收磷酸的工艺过程中实现。在这些条件下，在 190-200°C 的温度下，TBP 的分解在 5-10 分钟内定量进行。研究发现，该过程继续生成丁烯和大量不同分子量的烷烃和烯烃，这是由过量磷酸催化的分解产物的聚合和环化的二次过程引起的。在 TBP 分解过程中，放射性杂质进入磷酸相，从而产生中和并以磷酸盐玻璃形式处置的可能性。