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Solvent Extraction

Description: Report discussing methods and theories of solvent extraction. Factors that influence solvent extraction, such as the distribution coefficient, relative solubility, and physical properties of the solvent, are discussed as well.
Date: July 18, 1947
Creator: Smellie, Robert H., Jr. & Krause, D. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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SOLVENT EXTRACTION FOR URANIUM MOLYBDENUM ALLOY DISSOLUTION FLOWSHEET

Description: H-Canyon Engineering requested the Savannah River National Laboratory (SRNL) to perform two solvent extraction experiments using dissolved Super Kukla (SK) material. The SK material is an uranium (U)-molybdenum (Mo) alloy material of 90% U/10% Mo by weight with 20% 235U enrichment. The first series of solvent extraction tests involved a series of batch distribution coefficient measurements with 7.5 vol % tributylphosphate (TBP)/n-paraffin for extraction from 4-5 M nitric acid (HNO{sub 3}), usin… more
Date: June 7, 2007
Creator: Visser, A & Robert Pierce, R
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Centrifugal contractors for laboratory-scale solvent extraction tests

Description: A 2-cm contactor (minicontactor) was developed and used at Argonne National Laboratory for laboratory-scale testing of solvent extraction flowsheets. This new contactor requires only 1 L of simulated waste feed, which is significantly less than the 10 L required for the 4-cm unit that had previously been used. In addition, the volume requirements for the other aqueous and organic feeds are reduced correspondingly. This paper (1) discusses the design of the minicontactor, (2) describes results f… more
Date: December 31, 1995
Creator: Leonard, R. A.; Chamberlain, D. B. & Conner, C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Recent developments in feed preparation and solvent extraction

Description: For presentation at the 5th Nuclear Congress, Clevelands Apr. 7, 1959. Increasing emphasis has been placed recently on the application of solvent extraction to the recovery of uranium and plutonium from spent power reactor fuels. Zircaloy-2 jackets were removed from PWR blankettype fuels by dissolution with the Zirflex Process, and the UO/sub 2/ cores were dissolved in 10 M HNO/sub 3/. Zirflex treatment of prototype samples irradiated to 2500 Mwd/ ton resulted in satisfactory dissolution rates … more
Date: March 20, 1959
Creator: Bruce, F. R.; Blanco, R. E. & Bresee, J. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of a novel solvent for the simultaneous separation of strontium and cesium from dissolved Spent Nuclear Fuel solutions

Description: The recovery of Cs and Sr from acidic solutions by solvent extraction has been investigated. The goal of this project was to develop an extraction process to remove Cs and Sr from high-level waste in an effort to reduce the heat loading in storage. Solvents for the extraction of Cs and Sr separately have been used on both caustic and acidic spent nuclear fuel waste in the past. The objective of this research was to find a suitable solvent for the extraction of both Cs and Sr simultaneously from… more
Date: October 1, 2004
Creator: Riddle, Catherine L.; Baker, John D.; Law, Jack D.; McGrath, Christopher A.; Meikrantz, David H.; Mincher, Bruce J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Interfacial chemistry in solvent extraction systems

Description: Research last year emphasized the nature of microscopic interfaces, i. e., reversed micelles and other association microstructures, which form in both practical and simplified acidic organophosphorus extraction systems associated with Ni, Co and Na in order to improve on a recently proposed model for aggregation of metal-extractant complexes. Also, the macroscopic interfacial behavior of extractant molecules and their interactions with metal ions which occur in hydrometallurgical solvent extrac… more
Date: January 1, 1992
Creator: Neuman, R.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The SX Solver: A New Computer Program for Analyzing Solvent-Extraction Equilibria

Description: A new computer program, the SX Solver, has been developed to analyze solvent-extraction equilibria. The program operates out of Microsoft Excel{reg_sign} and uses the built-in ''Solver'' function to minimize the sum of the square of the residuals between measured and calculated distribution coefficients. The extraction of nitric acid by tributylphosphate has been modeled to illustrate the program's use.
Date: February 9, 1999
Creator: McNamara, B.K.; Rapko, B.M. & Lumetta, G.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A new model for solvent extraction in columns

Description: A new model was developed for analyzing solvent extraction processes carried out in columns. Each column is treated as a series of well-defined equilibrium stages where the backmixing (other-phase carryover) between stages can be large. By including all mass transfer effects in the backmixing value, the same number of stages can be used for all extracted components no matter what their distribution coefficients. This greatly simplifies the calculations required when modeling multicomponent solv… more
Date: December 8, 1989
Creator: Leonard, R. A.; Regalbuto, M. C.; Chamberlain, D. B. & Vandegrift, G. F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Solvent extraction of phenols from water

Description: Methyl isobutyl ketone (MIBK) and diisopropyl ether (DIPE) have been evaluated as solvents for extraction of phenols, at high dilution, from water. Equilibrium distribution coefficients (K/sub D/) have been measured for phenol, dihydroxybenzenes and trihydroxybenzenes in both solvents as a function of pH. Particularly for the multihydric phenols, MIBK gives substantially higher values of K/sub D/ than does DIPE. The effect of pH can be described quantitatively through a simple ionization model,… more
Date: February 1, 1980
Creator: Greminger, D. C.; Burns, G. P.; Lynn, S.; Hanson, D. H. & King, C. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Treatment of waste lubricating oil using BERC/ERDA solvent

Description: From data generated in the laboratory and pilot plant studies a quality rerefined oil can be produced via BERC/ERDA solvent extraction and clay treatment. Some of the important processing variables that determine the quality of the finished product are temperature of solvent extraction, type of clay used, temperature and time of clay treatment, and the atmosphere under which the oil is treated with clay. Yields of 75 percent based on water-distillate-free oil can be expected at the conditions u… more
Date: June 25, 1976
Creator: Corlew, J. S. & Sluski, R. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Evaluation of the Hydraulic Capacity and Mass Transfer Efficiency of the CSSX Process with the Optimized Solvent in a Single Stage of 5.5-cm-Diameter Centrifugal Contactor

Description: The Caustic-Side Solvent Extraction (CSSX) process has been selected for the separation of cesium from Savannah River Site high-level waste. The solvent composition used in the CSSX process was recently optimized so that the solvent is no longer supersaturated with respect to the calixarene crown ether extractant. Hydraulic performance and mass transfer efficiency testing of a single stage of 5.5-cm ORNL-designed centrifugal contactor has been performed for the CSSX process with the optimized s… more
Date: September 1, 2002
Creator: Law, Jack Douglas; Tillotson, Richard Dean & Todd, Terry Allen
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Laboratory Development of a Tributyl Phosphate Solvent Extraction Process for Processing 20% Enriched Uranium Alloy Fuel

Description: Report containing a preliminary chemical flowsheet "for the preparation of feed and two solvent extraction cycles for the processing of silicon-containing aluminum-uranium alloy, 20% enriched, fuel elements" (p. 2).
Date: 1961
Creator: Goode, J. H. & Flanary, J. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Mass Transfer And Hydraulic Testing Of The V-05 And V-10 Contactors With The Next Generation Solvent

Description: The Modular Caustic Side Solvent Extraction (CSSX) Unit (MCU) facility is actively pursuing the transition from the current BOBCalixC6 based solvent to the Next Generation Solvent (NGS)-MCU solvent. To support this integration of NGS into the MCU facilities, Savannah River Remediation (SRR) requested that Savannah River National Laboratory (SRNL) perform testing of a blend of the NGS (MaxCalix based solvent) with the current solvent (BOBCalixC6 based solvent) for the removal of cesium (Cs) from… more
Date: July 31, 2013
Creator: Herman, D. T.; Duignan, M. R.; Williams, M. R.; Peters, T. B.; Poirier, M. R. & Fondeur, F. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Solvent Extraction Batch Distribution Coefficients with Savannah River Site Dissolved Salt Cake

Description: Researchers characterized high-level waste derived from dissolved salt cake from the Savannah River Site (SRS) tank farm and measured the cesium distribution coefficients (DCs) for extraction, scrub, and stripping steps of the caustic-side solvent extraction (CSSX) flowsheet. The measurements used two SRS high-level waste samples derived entirely or in part from salt cake. The chemical compositions of both samples are reported. Dissolved salt cake waste contained less Cs-137 and more dianions t… more
Date: May 22, 2002
Creator: Walker, D. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Interfacial chemistry in solvent extraction systems. Progress report, June 1, 1991--May 31, 1992

Description: Research last year emphasized the nature of microscopic interfaces, i. e., reversed micelles and other association microstructures, which form in both practical and simplified acidic organophosphorus extraction systems associated with Ni, Co and Na in order to improve on a recently proposed model for aggregation of metal-extractant complexes. Also, the macroscopic interfacial behavior of extractant molecules and their interactions with metal ions which occur in hydrometallurgical solvent extrac… more
Date: January 1, 1992
Creator: Neuman, R. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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V5 AND V10 CONTACTOR TESTING WITH THE NEXT GENERATION (CSSX) SOLVENT FOR THE SAVANNAH RIVER SITE INTEGRATED SALT DISPOSITION PROCESS

Description: A solvent extraction system for removal of cesium (Cs) from alkaline solutions was developed utilizing a novel solvent invented at the Oak Ridge National Laboratory (ORNL). This solvent consists of a calix[4]arene-crown-6 extractant dissolved in an inert hydrocarbon matrix. A Modifier is added to the solvent to enhance the extraction power of the calixarene and to prevent the formation of a third phase. An additional additive, called a suppressor, is used to improve stripping performance. The p… more
Date: January 17, 2012
Creator: Restivo, M.; Peters, T.; Pierce, R.; Fondeur, F.; Steeper, T.; Williams, M. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Solvent Extraction of Uranium From Carbonate Solutions

Description: A process for recovering uranium from carbonate leach liquors by extraction with quaternary ammonium compounds was developed and evaluated in bench-scale continuous equipment with synthetic liquors. Uranium was recovered from the solvent by direct precipitation with sodium hydroxide --sodium carbonate solution. Results with relatively pure synthetic carbonate liquors were favorable, but attempts to treat a highly contaminated leach liquor from a western mill were relatively unsuccessful owing t… more
Date: August 30, 1961
Creator: Seeley, F. G.; Hurst, F. J. & Crouse, D. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of Continuous Solvent Extraction Processes for Coal Derived Carbon Products

Description: This DOE NETL-sponsored effort seeks to develop continuous processes for producing carbon products from solvent-extracted coal. A key process step is removal of solids from liquefied coal. Three different processes were compared: gravity separation, centrifugation using a decanter-type Sharples Pennwalt centrifuge, and a Spinner-II centrifuge. The data suggest that extracts can be cleaned to as low as 0.5% ash level and probably lower using a combination of these techniques.
Date: December 31, 2006
Creator: Kennel, Elliot B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Pilot Plant Development Studies of a Continuous Process for Recovering Uranium From Nichrome Fuels

Description: Pilot plant studies were conducted to develop a continuous process for recovering uranium from nichrome fuels (HTRE). The process consisted of dissolution of fuel in mixed HCl--HNO/sub 3/ solution, removal of the chloride ion by stripping with HNO/sub 3/ in a packed column, and then recovery of the uranium by TBP solvent extraction. Recovery of uranium from nichrome fuels at satisfactory rates and efficiencies can be obtained by this process. Reactor fuels containing large amounts of silica may… more
Date: June 20, 1962
Creator: Chamberlain, H. V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Use of the TRUEX process for the pretreatment of neutralized cladding removal waste (NCRW) sludge: Results of a design basis experiment

Description: This report presents the results of an experiment designed to demonstrate the feasibility of a sludge dissolution/solvent extraction process to separate transuranic elements from the bulk components of Hanford neutralized cladding removal waste (NCRW) sludge. Such a separation would allow the bulk of the waste to be disposed of as low-level waste, which is much less costly than geologic disposal as would be required for the waste in its current form. The results indicate that the proposed proce… more
Date: July 1, 1991
Creator: Swanson, J L
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A Hydraulic Power Unit for Solvent Extraction Column Pulse Generators

Description: A power unit comprised of a reciprocating hydraulic cylinder controlled by hydraulic, mechanical, and electrical elements was developed to drive pulse generators for solvent extraction columns in the Purex Hot Semiworks. Design bases included remote control of continuouslyvariable pulse amplitudes between 1/ 2 and 1/2 inches, and pulse frequency up to 120 cycles/min. Each of nine power units operated 30 to 60 million cycles without serious difficulty, although minor modifications and correction… more
Date: August 23, 1957
Creator: Kelly, V. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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