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PURIFICATION OF PROMETHIUM BY LIQUID-LIQUID EXTRACTION

Description: A process was developed for separating promethium from raixed fisBion product rare earths by continuous multistage conntercurrent extraction with 100% tri-nbutylphosphste from nitric acid of 12 N or higher concentration. Distribution coefficients at 12 N acidity for aecdamium. promethium. and samarium are 0.43. 0.82, and 1.55, respectively. Single-stage separation factors of 1.9 between successive elements can be maintained throughout the system to give separations dependent only on the number … more
Date: February 12, 1960
Creator: Weaver, B. & Kappelmann, F.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Chemical Technology Division, Chemical Development Section C Progress Report for April-May 1960

Description: An economical process was successfully demonstrated in bench-scale continuous equipment for stripping U from amines with ammonium carbonate solution. A continuous countercurrent mixer-settler extraction system was set up for further testing of the process for recovery of Te, Np, and U by tertiary amine extraction from UF/sub 6/ transfer cylinder was solutions. The effect of Purex aqueous feed adjustment procedures on Pu extraction by 1 M di-secbutyl phenylphosphonate (DSBPP) was studied. Work w… more
Date: July 12, 1960
Creator: Brown, K B
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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COMPARISONS OF ORGANIC EXTRACTANTS FOR IRRADIATED URANIUM: TRIBUTYLPHOSPHATE VS DI-SEC-BUTYL PHENYLPHOSPHONATE, DI-N-BUTYL PHENYLPHOSPHONATE, TRI-CAPRYL-PHOSPHATE AND TRI-SEC-BUTYLPHOSPHATE

Description: Batch extraction scouting tests were performed to establish comparisons of distribution coefficients for uranium, thorium, fission product, and/or plutonium in systems involving several classes of organic phosphorus compounds (diluted in Amsco 125-82 and/or xylene) and aqueous nitrate or nitric acid solutions. Results have substantiated previous conclusions which suggested (1) that the branched secondary alkylphosphates and alkylphenylphosphonates would generally afford uranium separation facto… more
Date: June 1, 1959
Creator: Gresky, A.T. & Mansfield, R.G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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CHEMICAL TECHNOLOGY DIVISION, CHEMICAL DEVELOPMENT SECTION C, PROGRESS REPORT ON SEPARATIONS CHEMISTRY AND SEPARATIONS PROGRESS RESEARCH FOR JANUARY-JUNE 1963

Description: Cesium Recovery from Ores. Adaptation of the phenol extraction (Phenex) process to the recovery of cesium from ore leach liquors continued to show promise. In roast-leach tests, 98 to 99% of the cesium was dissolved from pollucite ore by roasting the ore at 800 deg C with 1.8 parts of Na/sub 2/CO/sub 3/ plus 1.2 parts of NaCl and leaching with water. More than 99% of the cesium was recovered from the leach liquor and separated from other alkali metals by extracting with 4-sec-butyl-2-( alpha -m… more
Date: October 25, 1963
Creator: Brown, K.B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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CHEMICAL EQUILIBRIA AND REACTION RATES FOR HYDROFLUORINATION OF UO$sub 2$ FROM "AMMONIUM DIURANATE" AND FROM UO$sub 3$

Description: Reaction rates for the hydrofluorination of UO/sub 2/ derived from two widely different source materials (sulfated pot-denitrated UO/sub 3/ and "ammonium diuranate," (ADU)) were determined in a thermobalance over a wide range of temperatures (460 deg F to 1150 deg F) and with several HF--H/sub 2/O gas phase mixtures varying from 20 to 100 per cent HF. These data were then organized to yield single plots for each type of feed material. From these plots, maximum instantaneous reaction rates may b… more
Date: March 12, 1958
Creator: Briggs, G.G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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STRESS ANALYSIS OF SCTI MIXING TEES

Description: A specially designed tee, which is verified by stress analysis to be operable under the design conditions of the SCTl test installation, is shown. The main line sodium flow is changed from primary sodium flow at 1300 deg F to secondary sodium flow at 700 deg F. This is done at such a rate as to cause the downstream temperature to change 35 deg F/sec. There are 25 of these cycles. Startup causes a temperature change from ambient to 350 deg F on both lines at a rate of 100 deg F/hr. There are 5 o… more
Date: June 22, 1962
Creator: Logan, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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MGCR HEAT EXCHANGER TEST PROGRAM. Final Report

Description: The Maritime Gas-cooled Reactor (MGCR) project has conipleted the study and design of a closed-cycle gasturbine propulsion plant utilizing a helium- cooled nuclear reactor as the heat source. The cycle employs a counterflow shell- and-tube regenerator to attain a high thermodynamic cycle efficiency. A heat exchanger test program was conducted to compile and correlate sufficient experimental data for the aerodynamic and thermal design of the prototype regenerator. The model heat exchanger was si… more
Date: April 1, 1961
Creator: Paulson, H.C. II
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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HEAT TRANSFER ANALYSIS AND DESIGN OF A PLUGGING INDICATOR SYSTEM FOR SRE

Description: The analysis was performed on a system comprising a counterflow, concentric-pipe economizer, heat exchanger, flowmeter, plug, and connecting pipe. The system was assumed to be at some initial temperature equal to the inlet sodium temperature and suddenly loses heat to a medium in the heat exchanger. Design and operating data are presented. A cooling rate curve is given where the nitrogen flow rate is decreased when the plug temperature reaches 400 deg F. The time variation of minimum temperatur… more
Date: April 1, 1955
Creator: Sletten, H. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Chemical Technology Division, Chemical Development, Section C, Monthly Progress Report, August 1959

Description: The solvent extraction of U from carbonate solutions was studied. The prevention of silica staabilized emulsions in the Amex and Dapex processes by solventcontinuous mixing is reported. The recovery of U and Pu from H/sub 2/SO/ sub 4/ decladding solutions by continuous countercurrent extraction with primary amines, HNO/sub 3/ stripping from primary amine, U/sup 6+/ extraction by primary amine, and U extraction by dialkylphosphoric acid is being studied. Plutonium was effectively freed from Am c… more
Date: September 1, 1959
Creator: Brown, K. B.; Allen, K. A.; Coleman, C. F.; Crouse, D. J. & Ryon, A. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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ANALYSIS OF SNAP REACTOR COOLANT CROSS-FLOW IN THE SNAP-2 REACTOR EXCLUDING THE PERIPHERAL $sub 4$UNFED$sub 4$ CHANNEL

Description: The deviation from the expected coolant flow distribution within the SNAP 2 reactor is due to the filling and draining of the unfed'' peripheral flow channels. An analysis of the cross-flow in a simulated SNAP 2 model omitting the unfed'' peripheral channels was made. The results of this investigation are presented herein. (auth)
Date: February 20, 1964
Creator: Montgomery, L.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Separations of yttrium and some rare earths by liquid-liquid extraction

Description: The use of liquid-liquid extraction for the separation of some inorganic compounds was demonstrated. The yttrium-- rare earth concentrates were obtained from Fergusonite ore, Gadolinite ore, and a by-product from an ion-exchange resin separation process. In each case the mixture in terms of oxide was composed of from 50 to 60% yttrium and 5 to 15% heavy rare earths with the light rare earth fraction constituting the remaining material. Tributyl phosphate was generally employed for exracting nit… more
Date: July 1, 1954
Creator: Foos, R. A. & Wilhelm, H. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Continuous chemical reaction chromatography. Progress report, January 1989--January 1992

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: July 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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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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Strictly hyperbolic models of co-current three-phase flow withgravity

Description: We study the character of the equations in the traditional formulation of one-dimensional immiscible three-phase flow with gravity, in the limit of negligible capillarity. We restrict our analysis to co-current flow required for a displacement process; in cases of mixed co-current and counter-current flow, capillarity effects cannot be dropped from the formulation. The model makes use of the classical multiphase extension of Darcy's equation. It is well known that, if relative permeabilities ar… more
Date: November 18, 2002
Creator: Juanes, Ruben & Patzek, Tadeusz W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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FRACTURED PETROLEUM RESERVOIRS

Description: The four chapters that are described in this report cover a variety of subjects that not only give insight into the understanding of multiphase flow in fractured porous media, but they provide also major contribution towards the understanding of flow processes with in-situ phase formation. In the following, a summary of all the chapters will be provided. Chapter I addresses issues related to water injection in water-wet fractured porous media. There are two parts in this chapter. Part I covers … more
Date: June 11, 1999
Creator: Firoozabadi, Abbas
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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DEGRADED TBP SOLVENT REGENERATION TECHNOLOGY USING BUTYLAMINE AS A SOLVENT WASHING TO REDUCE SOLID SALT WASTE

Description: Normal butylamine compounds are studied as salt-free wash reagents for degraded solvent used in PUREX process in spent fuel reprocessing. The solvent wash tests were carried out with two types of butylamine compounds, n-butylamine oxalate and n-butylamine bicarbonate, by counter-current mode using a small size mixer-settler composed of two 4-stage wash steps. Di-n-butyl phosphoric acid (HDBP), the main degradation product from TBP, was removed from real degraded solvent with decontamination fac… more
Date: February 27, 2003
Creator: Asakura, T.; Itoh, Y.; Hotoku, S.; Morita, Y. & Uchiyama, G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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COUNTERCURRENT MUTUAL SEPARATION OF Y$sup 91$ AND Pm$sup 147$ BY SOLVENT EXTRACTION USING PULSE COLUMN

Description: The use of continuous solvent extraction was proved quite satisfactory in separating Y/sup 91/ from Pm/sup 147/, using synthetic mixtures of the nuclide pair on a tracer level. The separation was conducted in a compound perforated plate pulse column using a solvent containing 10% HDEHP, di(2 ethylhexyl) phosphoric acid, in toluene. Flow rates to the extraction column were maintained around 1 ml/min of feed, 3 ml/min scrub and 12 ml/min solvent giving one volume change per hour. Pulse frequency … more
Date: February 1, 1962
Creator: Mandil, M. A.; Mason, G. W. & Peppard, D. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Development of Equipment for the Continuous Burning and Leaching of Ground Carbon

Description: Equipment was developed for the continuous burning and leaching of ground carbon in order to recover uranium for the proposed Closed Cycle Beta Process. The burning apparatus consisted of a vertical tube with a grate to support the carbon. An uppdraft of air was used to support combustion. The burning rate of the apparatus was 500 grams of carbon per hour; combustion averaged over 98% complete. The leacher consisted of a heated nitric acid bath divided in four compartments through which ground … more
Date: April 14, 1949
Creator: Petretzky, P. B.; Twichell, L. P.; Williams, R. D. & Waldrop, F. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Method and Apparatus for separation of heavy and tritiated water

Description: An object of the present invention is to provide a method for separating and recovering hydrogen isotopes that avoids the disadvantages of the prior art, is more simple, and allows for continuous hydrogen isotope separation and recovery. The disclosed invention does not require the use of isotope exchange reaction catalysts and/or hydrogen sulfide gas. The present invention achieves the advantages of the thermal diffusion and the chemical exchange processes. The disclosed invention provides a m… more
Date: February 28, 2000
Creator: Lee, Myung, W.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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Pilot-Scale Test of Counter-Current Ion Exchange (CCIX) Using UOP IONSIV IE-911

Description: A pilot-scale test of a moving-bed configuration of a UOP IONSIV? IE-911 ion-exchange column was performed over 17 days at Severn Trent Services facilities. The objectives of the test, in order of priority, were to determine if aluminosilicate precipitation caused clumping of IE-911 particles in the column, to observe the effect on aluminum-hydroxide precipitation of water added to a simulant-filled column, to evaluate the extent of particle attrition, and to measure the expansion of the mass-t… more
Date: September 24, 2001
Creator: Wester, Dennis W.; Leugemors, Robert K. & Taylor, Paul W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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