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Solvent anode for plutonium purification

Description: The purpose of this study is to develop a technique to allow complete oxidation of plutonium from the anode during plutonium electrorefining. This will eliminate the generation of a ''spent'' anode heel which requires further treatment for recovery. Our approach is to employ a solvent metal in the anode to provide a liquid anode pool throughout electrorefining. We use molten salts and metals in ceramic crucibles at 700/sup 0/C. Our goal is to produce plutonium metal at 99.9% purity with oxidati… more
Date: January 1, 1986
Creator: Bowersox, D. F.; Fife, K. W. & Christensen, D. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Recovery of plutonium from carbon analysis residues

Description: A method was developed for the recovery of plutonium from residues resulting from analyses of plutonium metal for carbon. The residue from each carbon analysis contains about 0.5 g of plutonium as high-fired PuO/sub 2/. By use of 2/sup P/ factorial experimental designs, recovery methods utilizing a variety of acids and conditions were investigated. The optimum recovery procedure was determined to be leaching of the crushed crucible and contents with a hot solution of 7M HNO/sub 3/ - 0.2M HF for… more
Date: April 1, 1978
Creator: Gray, L.W. & McGahee, N.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Developing empirical correlations from basic GPC data and deriving of fundamental GPC parameters for a given system

Description: The Bartlesville Energy Research Center, in cooperation with American Petroleum Institute Research Project 60, used gel permeation chromatography (GPC) in the separation and characterization of the heavy ends of petroleum. The correlations are now being used to characterize oils from other fossil fuel sources such as coal, shale, and tar sands. By the use of retention-volume data for a few compounds, several fundamental parameters were developed and correlated. The parameters involved are expre… more
Date: August 1, 1977
Creator: Hirsch, D. E.; Coleman, H. J.; Dooley, J. E. & Thompson, C. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Continuous chemical reaction chromatography

Description: The past three years have been devoted to investigating simulated countercurrent chomatographic moving bed separators (SCMCS) and simulated countercurrent moving bed reactors (SCMCR). These are novel separators and reactors used for separation, or for carrying out a chemical reaction and separation continuously and simultaneously in fixed bed. In the SCMCR and the SCMCS the process aspects of a countercurrent moving bed, in which a stream of solids flows countercurrent to an inert fluid and pas… more
Date: January 1, 1992
Creator: Aris, R. & Carr, R.W.
Item Type: Refine your search to only Report
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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Preparation of radioactive ''mixed'' waste samples for measurement of RCRA (Resource Conservation and Recovery Act) organic compounds. [Mixed waste containing alpha-, beta-, or gamma-emitting radionuclides]

Description: A radioactive ''mixed'' waste typically contains alpha-, beta-, or gamma-emitting radionuclides and varying quantities of semivolatile or volatile organic species, some or all of which may be named specifically by the Resource Conservation and Recovery Act (RCRA). Because there are no acceptable means available currently for disposing of these mixed wastes, they are presently stored above-ground in sealed drums. For this reason, analytical procedures which can determine RCRA organics in radioac… more
Date: January 1, 1987
Creator: Tomkins, Bruce A. & Caton, John E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Status of /sup 241/Am recovery and purification at Los Alamos Scientific Laboratory

Description: Americium recovery was initiated at Los Alamos Scientific Laboratory (LASL) in the late 1940's. The early procedures separated gram quantities of americium from large amounts of impurities including plutonium and the rare earths. Ion exchange procedures were developed for further purification. Until recently, no routine processing of americium has been done at LASL for several years. The increasing demand for americium in oil-well logging instruments and other uses led LASL to develop and insta… more
Date: January 1, 1980
Creator: Ramsey, H. D.; Clifton, D. G.; Hayter, S. W.; Penneman, R. A. & Christensen, E. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Perforated monolayers

Description: Goal of this research program is to create ultrathin organic membranes that possess uniform and adjustable pores ( < 7[angstrom] diameter). Such membranes are expected to possess high permeation selectivity (permselectivity) and high permeability, and to provide the basis for energy-efficient methods of molecular separation. Work carried out has demonstrated feasibility of using perforated monolayer''-based composites as molecular sieve membranes. Specifically, composite membranes derived from … more
Date: December 1, 1992
Creator: Regen, S. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Solvent extraction equipment evaluation study. Part 2. Workshop proceedings

Description: A summary is presented of a workshop held on the subject of solvent extraction equipment. The participants had considerable experience in the use of solvent extraction contactors in reprocessing plants. Among the topics discussed were contactor types, solids handling, feed clarification, solvent damage and washing, development work for plant operation, instrumentation and comparisons among contactor types. Recommendations were also made for additional research and development. (JSR)
Date: January 1, 1977
Creator: Watts, C. (ed.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Anion exchange of 58 elements in hydrobromic acid and in hydriodic acid

Description: Anion exchange distributions of 58 elements have been measured from 0.1-8.7M HBr and from 0.1-7.4M HI onto three strong-base resins, 8 and 4% cross-linked and macroporous. Data were obtained by 16- to 18-h dynamic batch contacts. Anion exchange in these media is compared to that in HCl. The effect of resin cross-linkage is considerably greater in HI media than in HBr and HCl media. Examples are presented of potentially useful separations using HBr and HI media alone and in combination with HCl.
Date: February 1, 1978
Creator: Marsh, S. F.; Alarid, J. E.; Hammond, C. F.; McLeod, M. J.; Roensch, F. R. & Rein, J. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Design requirements for uranium ion exchange from acidic solutions in a fluidized system

Description: A fluidized, countercurrent ion-exchange system was developed, operated, and evaluated by the Bureau of Mines in support of its objective to help assure an adequate uranium supply for future national needs. The system consisted of integrated multiple-compartment absorption and elution columns in which the solution flows are continuous, except for short periods when resin increments are withdrawn. The exchange of uranyl sulfate between a simulated acid-leach-uranium solution and a strong-base, i… more
Date: January 1, 1974
Creator: Traut, D.E.; Nichols, I.L. & Seidel, D.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Synthesis and characterization of an N-(2-hydroxyethyl)-ethylenediaminetriacetic acid resin

Description: A chelating ion-exchange resin with N-(2-hydroxyethyl)ethylene-diaminetriacetic acid (HEDTA) used as the ligand chemically bonded to XAD-4 by an ester linkage, HEDTA-4, was synthesized. It is stable under normal experimental conditions with the liquid chromatograph. The structure of the resin was confirmed by an infrared spectrum, and by potentiometric titrations. The capacity of the resin was also obtained by potentiometric titration and by a nitrogen analysis. The resin was used to pack a col… more
Date: October 1, 1977
Creator: Lai, Y. F.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
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Study of polynuclear aromatic hydrocarbons on an amino bonded phase liquid chromatographic column in the normal and reversed phase

Description: Experiments were run using an n-propyl amine polar bonded phase (Chromosorb LC-9) liquid chromatographic column in both the normal and reversed phase mode. Results confirm that the mechanism of separation in the normal phase is due mainly to a charge transfer interaction between the lone pair electrons on the stationary phase nitrogen and the ..pi.. electron cloud of the solute PNAs. Elution order seems to depend upon a combination of ..pi.. energy, and type of ring condensation of the solute. … more
Date: 1980~
Creator: Karlesky, Dori; Shelly, Dennis C. & Warner, Isiah M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Operation with three liquid phases in a staged liquid-liquid contactor

Description: Operation with three liquid phases was demonstrated in a staged liquid-liquid contactor. The possibility that three liquid phases could be handled in a liquid-liquid contactor normally used with two liquid phases was initially established using a laboratory batch test. Tht three liquid phases were obtained using a thorium flow sheet having high concentrations of both acid and thorium. To analyze the batch test, the concept of a dimensionless dispersion number for use with two liquid phases was … more
Date: March 1, 1983
Creator: Leonard, R. A.; Ziegler, A. A.; Wigeland, R. A.; Bane, R. W. & Steindler, M. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Synthesis and analysis of novel polymers with high permselectivity and permeability in gas separation applications

Description: We have synthesized and completed characterization of permeability and selectivity properties of a group of polysulfones and polyether ketones with the potential for higher use temperatures, as well as members of a series of polyesters derived from spirobiindane bisphenol monomer in conjunction with meta and para substituted diacid chlorides. We have also synthesized and characterized the gas transport and thermal properties of diphenyl substituted polyphenylene oxide. The diphenyl substituted … more
Date: November 15, 1991
Creator: Koros, W. J. & Paul, D. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analysis of backmixing and mass transfer in solvent extraction columns

Description: A critical survey of the published literature concerning modelling of liquid-liquid extraction columns, mass transfer studies in extraction towers and the influence of backmixing on concentration profiles, extraction efficiency and the number of transfer units has been made to determine the most accurate correlations for computing the true number of transfer units or the true overall mass transfer coefficients in backmixed solvent extraction columns. These parameters are of great significance a… more
Date: January 1, 1979
Creator: Nazem, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Anion exchange flow sheets and equipment for recovery of Task I filtrates

Description: The filtrate stream from the precipitation--filtration step of the Button Line process must be recycled to recovery operations to reclaim residual plutonium. Present practice is to transfer the filtrates to Recuplex, concentrate by a factor of 6 to 10, and blend into the feed stream for solvent extraction purification. Limited tankage is available for solution storage. Interruption of Recuplex operations necessitates termination of operations in the precipitation-filtration steps and other Butt… more
Date: April 23, 1962
Creator: Crocker, H. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development and validation of a cleanup method for hydrocarbon containing samples for the analysis of semivolatile organic compounds

Description: Samples obtained from the Hanford single shell tanks (SSTs) are contaminated with normal paraffin hydrocarbon (NPH) as hydrostatic fluid from the sampling process or can be native to the tank waste. The contamination is usually high enough that a dilution of up to several orders of magnitude may be required before the sample can be analyzed by the conventional gas chromatography/mass spectrometry methodology. This can prevent detection and measurement of organic constituents that are present at… more
Date: April 1, 1992
Creator: Hoppe, E. W.; Stromatt, R. W.; Campbell, J. A.; Steele, M. J. & Jones, J. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The effect of porous support composition and operating parameters on the performance of supported liquid membranes

Description: Factors, such as porous support composition and operating parameters, that influence the performance of supported liquid membranes (SLMs) were investigated. SLMs of varying porous support compositions and structures were studied for the transport of metal ions. A microporous polybenzimidazole support was synthesized and prepared in the form of an SLM. This SLM containing the selective extractant di-(2-ethylhexyl)phosphoric acid was evaluated for the transport of copper and neodymium. Dramatical… more
Date: February 1, 1991
Creator: Takigawa, D.Y.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Bile Salt Surfactants in Micellar Electrokinetic Capillary Chromatography: Application to Hydrophobic Molecule Separations

Description: Bile Salt surfactants are used in the micellar electrokinetic capillary chromatography (MECC) separation of various hydrophobic compounds. The use of methanol in the mobile phase allows the separation of previously intractable compounds including polyaromatic hydrocarbons. The effects of methanol on critical micelle concentration is investigated for sodium dodecyl sulfate (SDS) and the bile salt sodium cholate. It is determined that the unique structure of the bile salt micelle is much more tol… more
Date: January 1, 1990
Creator: Cole, Roderic O.; Sepaniak, Michael J.; Hinze, Willie L.; Gorse, Joseph & Oldiges, Kimberly
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The use of a centrifugal contactor for component concentration by solvent extraction

Description: Theoretical and experimental work was undertaken to explore the use of the Argonne design centrifugal contactor as a concentrating device for metal ions in solutions such as transuranic-containing waste streams and contaminated groundwater. First, the theoretical basis for operating the contactor as a concentrator was developed. Then, the ability of the contactor to act as a concentrating device was experimentally demonstrated with neodymium over a wide range of organic-to-aqueous (O/A) flow ra… more
Date: July 1, 1992
Creator: Leonard, R. A.; Wygmans, D. G.; McElwee, M. J.; Wasserman, M. O. & Vandegrift, G. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Removal of sulfamic acid from plutonium sulfamate--sulfamic acid solution

Description: Plutonium metal can be readily dissolved in aqueous solutions of sulfamic acid. When the plutonium sulfamate--sulfamic acid solutions are added to normal purex process streams, the sulfamate ion is oxidized by addition of sodium nitrite. This generates sodium sulfate which must be stored as radioactive waste. When recovery of ingrown /sup 241/Am or storage of the dissolved plutonium must be considered, the sulfamate ion poses major and undesirable precipitation problems in the process streams. … more
Date: October 1, 1978
Creator: Gray, L.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Removal of iron from impure graphites

Description: Iron-impregnated and ash-rich graphites have been purified by leaching with gaseous I/sub 2/ at 900/sup 0/C. With addition of H/sub 2/, the rate of removal of impurity iron can be markedly increased and becomes comparable to that obtained with Cl/sub 2/. I/sub 2/ has an advantage in that it can also volatilize Ca and perhaps Ba and Sr.
Date: January 1, 1979
Creator: Growcock, F. B. & Heiser, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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