Tri-n-butyl tin acetate and tri-n-propyl tin oxide were to have similar toxic effects on Australorbis glabratus, with the LC-% values ranging from 0.033 to 0.054 ppm for newly hatched snails to 0.1 to 0.13 ppm for 13-15 mm snails. Tri-n-propyl tin oxide w...
National Technical Information Service (NTIS)
We have used a simple process for the production of highly tritiated water and characterized the product species by {sup 1}H and {sup 3}H NMR spectroscopy. The water is readily manipulated and used in subsequent reactions either as T{sub 2}O, CH{sub 3}COOT or CF{sub 3}COOT. Development of tritiated diimide has progressed to the point where cis-hydrogenated products at 1-20 Ci/mmole S.A. are ...
DOE Information Bridge
... III. Dosage Form, Route of Administration, and Recommended Dosage. ... method; Tri-n-Butyl Phosphate by ----- Moisture by ----- method; Zinc ...
Center for Biologics Evaluation and Research (CBER)
... tri-n-butyl phosphate (TBP) as ... Descriptors : *SEPARATION, *URANIUM, *FISSION PRODUCTS ... ACID, KEROSENE, PHOSPHATES, SULFAMATES. ...
DTIC Science & Technology
... In addition, the six month report will include the final container tri-n-butyl phosphate level for each lot that is taken to final container. ...
The properties of a series of liquid scintillators containg tri-n-butyl phosphate and dissolved metallic ions were investigated for possible use in counters. The findings are summarized. (C.H.)
Energy Citations Database
Bench scale studies were conducted to develop techniques for stripping tetravalent cerium from tri-n-butyl phosphate solutions. Experiments were conducted in a constant temperature bath using beakers and mechanical stirring. Ninety-five percent of the cer...
Absorption of thorium, uranium, plutonium and some fission products by macrorecticular ion exchange resins from tri-n-butyl phosphate solutions is investigated for the first time. Thorium, plutonium and the fission products are found to be preferentially ...
Tri-n-butyl phosphate associated with an inert hydrocarbon, is the principal solvent used in reprocessing of nuclear irradiated fuel arising from pressurized water reactors nowdays. The combined action of radiation and nitric acid cause severe damage to t...
Data are presented for the rates of formation of din-butyl phosphate (DBP) from tri-n-butyl phosphate. The effects of DBP on the extraction of zirconium from nitric acid and uranyl nitrate are reported. (auth)
Tri-n-butyl phosphate (TBP) diluted with a suitable diluent is commonly used for solvent extraction in Purex process for the recovery of uranium and plutonium from irradiated nuclear fuels. This solvent gets degraded due to various factors, the main degra...
A general procedure for the preparation of nitramines from tertamines was developed. The best procedure calls for an initial transformation of the tertiary amine into a nitrosamine followed by oxidation to the nitramine. From tri-n-butyl amine and nitric ...
In initial operation of a new flowsheet for recovery of highly irradiated enriched uranium by solvent extraction with 7.5 vol percent tri-n-butyl phosphate, valence adjustment of plutonium and neptunium with ferrous sulfamate was ineffective; plutonium wa...
Tests were conducted to determine whether the reverse osmosis (RO) units at the F/H Effluent Treatment Facility (ETF) at the Savannah River could be made to process solutions containing tri-n-butyl phosphate (TBP). It was desired to test whether operation at a feed pH other than neutral would improve performance. Test results are discussed in this report and indicate that ...
The interaction between tri-n-butyl phosphate and mono(2-ethylhexyl)- phosphonic acid was investigated. The method of continuous variations utilizing changes in infra red absorption and changes in the freezing point depression of the mixtures was used. Isopiestic measurements also were made. Results gave evidence that an association product had resulted at a ratio of ...
The need for a method for the rapid determination of microgram amounts of uranium in the presence of milligram amounts of contaminants led to the development of a spectrophotometric method. Uranyl ritrate is extracted into tri- n-butyl phosphates where, after-buffering with tris (hydroxymethyl)-amino methane and adding ethyl alcohols the yellow ...
An investigation of the mechanism of the samarium diiodide mediated Barbier reaction was conducted. Through a series of alkyl halide-carbonyl coupling and deuterium labelling experiments, evidence supportive of an organometallic addition mechanism was collected. Further probing led to an expansion of the utility of SmI[sub 2] in synthesis. The author has shown that radical cyclization of aryl and ...
The extraction of zirconium from nitric acid media with alkyl phosphates, phosphonate, phosphinate, and phosphine oxide was studied. The extraction ability is affected by alkyl substituents attached to the phosphoryl group as well as by the solvent structure, the order of efficiency being: tri-n- butyl phosphinate > ...
The presence of up to 1% of aromatic or olefinic hydrocarbon in 20% tri- n-butyl phosphate in kerosene containing icdine does not significantly affect the efficiency of radiation-induced iodine fixation. Fixation yields are greatest with pure n-dodecane and cyclohexane. With kerosene, yields are lower, presumably as a result of a protective effect ...
In a review of the safety basis for solvent extraction processes at the Department of Energy's Savannah River Site, a question was raised concerning the safety margin associated with a postulated accident involving a runaway tri-n-butyl phosphate (TBP)/nitric acid reaction due to the inadvertent heating of a tank. The safety margin was based on studies which showed ...
