Removal of dissolved Tri n-butyl phosphate from aqueous streams of reprocessing origin: Engineering scale studies

Manohar, S. Β.; Kutty, K. Narayan; Shah, Bharat; Wattal, P.K.; Bajoria, Shaila Lalkuwar; Kolhe, Nitin S.; Rathod, Virendra K.

doi:10.5004/dwt.2012.2738

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“…This information along with its hydrodynamic properties has to be determined as part of engineering research for designing the column. 24 It is observed that only one attempt has been made so far, by Manohar et al, 25 for the separation of TBP aqueous stream from the reprocessing origin and that was using a combined airlift based mixer−settler unit (CAL-MSU). However, there are no reports of mass transfer studies for the removal of the TBP in PSPEC.…”

Section: Introductionmentioning

confidence: 99%

“…However, there are no reports of mass transfer studies for the removal of the TBP in PSPEC. Therefore, the present study has been undertaken to carry out the mass transfer studies for the removal of TBP in PSPEC using the original industrial system, i.e., nitric acid–TBP–NPH system, where an attempt has been made to find out the effects of operating parameters such as pulse velocity and superficial velocities of dispersed and continuous phases on the volumetric mass transfer coefficient. The transient axial holdup and concentration behavior plays an important role in relating complete dynamic mass transfer equations .…”

Section: Introductionmentioning

confidence: 99%

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Mass Transfer Studies in Pulsed Sieve Plate Extraction Column for the Removal of Tributyl Phosphate from Aqueous Nitric Acid

Lade

Pakhare

Rathod

2014

Ind. Eng. Chem. Res.

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Removal of a saturated amount of tributyl phosphate (TBP) from a nuclear reprocessing aqueous waste stream is very important as far as economy of process as well as waste disposal is concerned. The present research work describes the detailed mass transfer studies for the removal of TBP from aqueous stream in a geometrically optimized pulsed sieve plate extraction column (PSPEC). The original industrial system, viz., 0.3 M nitric acid–TBP–normal paraffinic hydrocarbon (NPH), was used for the mass transfer studies. The effect of operating parameters such as continuous to dispersed phase velocity ratio and pulsed velocity on the volumetric mass transfer coefficient was investigated. The effect of operating parameters on the variation in axial concentration and holdup profile is also studied to evaluate the dynamic operation of the column for the attainment of steady state. The experimental results indicate that pulse velocity has a strong effect on the volumetric mass transfer coefficient, while the effect of the continuous phase flow rate is greater than the effect of the dispersed phase flow rate.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%