Haze Formation and Behavior in Liquid-Liquid Extraction Processes

Book · Mon Jul 31 00:00:00 EDT 2006

OSTI ID:894848

Arm, Stuart T; Jenkins, J A

Aqueous haze formation and behavior was studied in the liquid-liquid system tri-n-butyl phosphate in odorless kerosene and 3M nitric acid with uranyl nitrate and cesium nitrate representing the major solute and an impurity, respectively. A pulsed column, mixer-settler and centrifugal contactor were chosen to investigate the effect of different turbulence characteristics on the manifestation of haze since these contactors exhibit distinct mixing phenomena. The dispersive processes of drop coalescence and breakage, and water precipitation in the organic phase were observed to lead to the formation of haze drops of {approx}1 um in diameter. The interaction between the haze and primary drops of the dispersion was critical to the separation efficiency of the liquid-liquid extraction equipment. Conditions of high power input and spatially homogeneous mixing enabled the haze drops to become rapidly assimilated within the dispersion to maximize the scrub performance and separation efficiency of the equipment.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 894848
• Report Number(s): PNWD-SA-6586; TRN: US0700323
• Resource Relation: Related Information: Separations for the Nuclear Fuel Cycle in the 21st Century, ACS Symposium Series, 933:103-118
• Country of Publication: United States
• Language: English

Related Subjects

12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
TBP
CESIUM NITRATES
COALESCENCE
EXTRACTION APPARATUSES
KEROSENE
MIXER-SETTLERS
NITRIC ACID
PRECIPITATION
SOLVENT EXTRACTION
TURBULENCE
URANYL NITRATES
RADIOACTIVE WASTE PROCESSING