Solvent recovery from aqueous effluent using process diluent in the caustic-side solvent extraction (CSSX) process.

Arafat, H. A. ; Falkenberg, J. R. ; Leonard, R. A.

Argonne National Laboratory

关键词: Materials Recovery;    Radioactive Waste Processing;    Extraction Apparatuses;    Solvents;    Cost Estimation;   

DOI  :  10.2172/801657
RP-ID  :  ANL-02/31
RP-ID  :  W-31-109-ENG-38
RP-ID  :  801657

美国|英语

来源: UNT Digital Library

【 摘 要 】

In this work, solvent recovery from aqueous CSSX process raffinate effluent was tested using the process diluent (Isopar{reg_sign}L). A model was developed to obtain stage efficiency for the diluent contact stages. The model was used to fit experimental data from a 19.8-hr solvent recovery test. Diluent-in-aqueous entrainment was measured during the test. Vacuum distillation was used to concentrate the solvent components, BOBCalixC6 and modifier, in the diluent used in solvent recovery. Using the results, a feasibility study was performed to compare the annual cost of lost solvent under each of four solvent recovery options. These options were decanter tank, centrifuge, two-stage diluent contact using centrifugal contactor, and no solvent recovery action.