Ames Laboratory

The Rare Earth Information Center (RIC), Ames Laboratory of the U.S. Dept, of Energy, Ames, Iowa, maintains an up-to-date file on the new rare-earth developments and pubUshes quarterly RIC news. 

L. Burkhart, A. Survey of Simulated Methods for Modeling Pulsed Sieve-Plate Extraction Columns, UCRL-15101, Ames Laboratory, Iowa State University, Ames, Iowa, 1979. 

Solvent Extraction. The industrial separation of tantalum from niobium was carried out historicahy by the Marignac process of fractional crystallization of potassium heptafluorotantalate and potassium heptafluoroniobate (15,16) or the long-estabhshed Fansteel process (17), which involved the decomposition of the ore by a caustic fusion procedure. Processors have replaced these expensive processes by procedures based on solvent extraction. This technique was developed in the United States at Ames Laboratory and the U.S. Bureau of Mines (18). Figure 2 shows the flow sheet of an industrial instahation for the hydrometahurgical processing of tantalum—niobium raw materials. 

Reduction of uranium tetrafluoride by magnesium metal has been described in detail (40,53). It is often referred to as the Ames process, since it was demonstrated at the Ames Laboratory in early 1942. The reaction is very exothermic and the reduction process is carried out in a sealed bomb due to... 

In the tributyl phosphate extraction process developed at the Ames Laboratory, Iowa State University (46—48), a solution of tributyl phosphate (TBP) in heptane is used to extract zirconium preferentially from an acid solution (mixed hydrochloric—nitric or nitric acid) of zirconium and hafnium (45). Most other impurity elements remain with the hafnium in the aqueous acid layer. Zirconium recovered from the organic phase can be precipitated by neutralization without need for further purification. 

The amine, under the name N,N,N, N -tetramethyl-methylenediamine, may be purchased from Ames Laboratories, South Norwalk, Connecticut. The checkers prepared it by the following procedure. A solution of 60.7 g. (0.75 mole) of 37% aqueous formaldehyde solution is placed in an 800-ml. beaker equipped with a mechanical stirrer and thermometer, and cooled in an ice bath. Two hundred seventy-one grams (1.50 moles) of a 25% aqueous solution of dimethylamine is added to this solution at a rate such that the reaction temperature is kept below 15°. The solution is stirred for 30 minutes after the addition is complete, and potassium hydroxide pellets (approximately 150 g.) are added in portions until the reaction mixture separates into two layers. The upper layer is separated, dried over potassium hydroxide pellets overnight, and distilled to give 59 -64 g. (77-83%) of bis(dimcthylamin())mclliane, b.p. 83 84°. ... 

US Atomic Energy Commission Publication No. ISC-1 118, Semi-annual Summary, Research Report in Engineering for July-December, Ames Laboratory, Ames, Iowa (I958)t... 

US Atomic Energy Commission Pub. No. lSC-607, Quarterly Summary Research Report in Metallurgy for Jan. to March, Ames Laboratory, Ames, Iowa (1955)... 

Analysed at Materials Preparation Center, Ames Laboratory, Ames, IA, USA... 

This book is about passion. A passion for chemistry. A passion for John D. Corbett, Distinguished Professor of Science and Humanities at Iowa State University of Science and Technology and Senior Chemist at the Ames Laboratory. A passion and admiration for John s way of conducting research in solid state chemistry and for the way he passes on his vast amount of accumulated knowledge to his students, postdoctoral associates and the community as a whole. John Corbett is a truly outstanding solid state inorganic chemist, an individual of immense and different talents, who has influenced not only his discipline but, in many ways, has led the renaissance in solid state chemistry over the past several decades. 

After graduating from Mikunigaoka High School, Osaka, he studied chemistry at the University of Tokyo from 1968 to 1972 and continued research on hydrido complexes and transition metal hydrides to earn the Dr. sc. degree under the supervision of Professor Yukiyoshi Sasaki in 1977. As a postdoctoral fellow, he worked with Professor John D. Corbett at the Ames Laboratory from 1977 to 1979, and with Professor Arndt Simon at Max-Planck-Institut fur Festkorperforschung, Stuttgart, Germany from 1979 to 1981. In... 

Ames Laboratory (Iowa State University, USA) investigating new solid state phases based on reduced rare earth halides. Since 1993, she has held a position at the University Jaume 1 of Castello (Spain) and became Associate Professor of Physical Chemistry in 1995. During the second semester of 2005, she held a visiting professor position at the Laboratory of Chemistry, Molecular Engineering and Materials of the CNRS-Universtity of Angers (France). Her research has been focussed on the chemistry of transition metal clusters with special interest in multifunctional molecular materials and the relationship between the molecular and electronic structures of these systems with their properties. She is currently coauthor of around 80 research papers on this and related topics. 

At the Ames Laboratory this research was supported by the Department of Energy, Basic Energy Sciences, under Contract No. DE-AC02-07CH11358. The support of ExxonMobil Research and Engineering Co. is also gratefully acknowledged. 

Acknowledgement The research described herein was supported by the US National Science Foundation, Solid State Chemistry, via grant DMR-0444657 and earlier grants. The writing of this article was supported by Basic Energy Sciences, US Department of Energy (DOE), and all of this was carried out in the facilities of the Ames Laboratory, US-DOE. 

Iowa State University, Ames Laboratory and Department of Chemistry, Ames, IA 50011... 

Ames (2) A wet oxidation process for desulfurizing coal in which the oxidant is oxygen and the sulfur dioxide is absorbed by aqueous sodium carbonate. Developed in the 1970s by the Ames Laboratory of Iowa State University, with funding from the U.S. Department of... 

Hichlor A family of processes for making aluminum trichloride and other volatile metal chlorides by chlorinating fly ash and other coal wastes in fixed and fluidized beds. Developed by Ames Laboratory and Iowa State University from the mid-1970s to the mid-1980s. Not commercialized. 

Work performed in the Ames Laboratory of the U.S. Atomic Energy Commission, Contribution No. 2816. 

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