Removal of Actinides from Selected Nuclear Fuel Reprocessing Wastes

Navratil, J.D.; Thompson, Gary M.

doi:10.13182/nt79-a16305

Cited by 22 publications

(11 citation statements)

References 4 publications

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“…Extractants diluted with Isopar H provided low-dispersion aqueous phases that required no subsequent scrub step. 7. Americium(III) Kd values were significantly higher for extractants diluted with Isopar under all conditions tested.…”

Section: The Extraction Of Am (Iii)mentioning

confidence: 83%

Comparative evaluation of DHDECMP (dihexyl-N,N-diethylcarbamoyl-methylphosphonate) and CMPO (octylphenyl-N,N,-diisobutylcarbamoylmethylphosphine oxide) as extractants for recovering actinides from nitric acid waste streams

Marsh¹,

Yarbro²

1988

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Certain neutral, bifunctional organophosphorus compounds are of special value to the nuclear industry. Dihexyl-N,N-diethylcarbamoylmethylphosphonate (DHDECMP) and octylphenyl-N,N-diisobutylcarbamoylmethylphosphine oxide (CMPO) are highly selective extractants for removing actinide and lanthanide elements from nitric acid. We obtained these two extractants from newly available commercial sources and evaluated them for recovering Am(III), Pu(IV), and U(VI) from nitric acid waste streams of plutonium processing operations. Variables included the extractant (DHDECMP or CMPO), extractant/tributylphosphate ratio, diluent, nitrate concentration, nitrate salt/nitric acid ratio, fluoride concentration, and contact time. Based on these experimental data, we selected DHDECMP as the preferred extractant for this application. structures are shown in Fig. 1, were determined over a wide range of variables that encompass the composition of typical process feed streams. REAGENTS AND APPARATUS DHDECMP, obtained from Occidental Chemical Corporation, Specialty Products Division, Niagara Falls, New York, was used without additional purification. CMPO, obtained from M&T Chemicals, Inc., Rahway, New Jersey, was purified by contact with cation exchange resin, anion exchange resin, and carbonate washing, the MIX procedure of Horwitz and Gatrone. 17 Tetrachloroethylene (TCE), obtained from J. T. Baker Chemical Co., Phillipsburg, New Jersey, was used as received. Isopar H, a highly purified mixture of Cg to C12 isoalkanes, was used as received from the manufacturer. Exxon Chemical Company, Houston, Texas. Reagent-grade nitric acid, sodium nitrate, and hydrofluoric acid were used as received. Extraction bottles, 1-ounce, high-density polyethylene with 18-millimeter caps (catalog number 16054-010, were obtained from VWR Scientific, San Francisco. California. Dispensing spouts (catalog number F12638-0018) to fit the 1-ounce bottles with 18-millimeter caps were obtained from Bel-Art Products, Pequannock, New Jersey. A Burreli model 75 wrist-action shaker (catalog number 57040-049) was obtained from VWR Scientific,

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Section: The Extraction Of Am (Iii)mentioning

confidence: 83%

Comparative evaluation of DHDECMP (dihexyl-N,N-diethylcarbamoyl-methylphosphonate) and CMPO (octylphenyl-N,N,-diisobutylcarbamoylmethylphosphine oxide) as extractants for recovering actinides from nitric acid waste streams

Marsh¹,

Yarbro²

1988

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“…A band (Rf 0.31) was eluted to afford 258 mg (72%) of 7f: IR (TF) 2.92, 6.20, 6.73, 7.97 µ (Si-CH); NMR (CDClg) 0.14 (s, 9, Si(CHg)3), 2.64 (s, 1, OH), 2.94 (t, J = 7 Hz, 2, allylic H), 3.78 (s, 3, OCHg), 4.79 (t, J = 7 Hz, 1, CHOH), 6.68 (t, J = 7 Hz, 1, vinylic H), 6.84-7.29 (m, 9, aromatic H): mass spectrum (70 eV), m/e (relative intensity) 358 (M+, 3.6), 340 (2), 222 (48), 137 (100), 94 (11), 91 (7). Anal.…”

Section: Methodsmentioning

confidence: 99%

“…After assembly of the carbon skeleton of cholesterol via the route shown in Scheme VII, it was necessary only to introduce the C-22 hydroxyl group and to adjust the oxidation level in the side chain in order to achieve a partial Scheme VIIa (9) Huppi, G.; Siddall, J. B. J.…”

mentioning

confidence: 99%

Partial synthesis of (20R,22R)-20,22-dihydroxycholesterol

Kyler¹,

Watt²

1981

J. Org. Chem.

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“…Malonamides were designed to compete with carbamoyl-phosphine oxide compounds, such as CMPO (Fig. 11.8), developed in the 1980s at the Argonne National Laboratory (ANL, USA) to decontaminate transuranic waste (Navratil and Thomson, 1979, Horwitz et al, 1981 arising from the production of military grade plutonium. Although of lower effi ciency than CMPO when extracting An(III) from nitric acid solutions, lipophilic malonamides (containing a suitable number of carbon atoms) present several advantages over CMPO:…”

Section: Co-extraction Of Ln(iii) and An(iii) From Purex Raffi Nates mentioning

confidence: 99%

Development of highly selective compounds for solvent extraction processes: partitioning and transmutation of long-lived radionuclides from spent nuclear fuels

Hill¹

2011

Advanced Separation Techniques for Nuclear Fuel Reprocessing and Radioactive Waste Treatment

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Removal of Actinides from Selected Nuclear Fuel Reprocessing Wastes

Cited by 22 publications

References 4 publications

Comparative evaluation of DHDECMP (dihexyl-N,N-diethylcarbamoyl-methylphosphonate) and CMPO (octylphenyl-N,N,-diisobutylcarbamoylmethylphosphine oxide) as extractants for recovering actinides from nitric acid waste streams

Comparative evaluation of DHDECMP (dihexyl-N,N-diethylcarbamoyl-methylphosphonate) and CMPO (octylphenyl-N,N,-diisobutylcarbamoylmethylphosphine oxide) as extractants for recovering actinides from nitric acid waste streams

Partial synthesis of (20R,22R)-20,22-dihydroxycholesterol

Development of highly selective compounds for solvent extraction processes: partitioning and transmutation of long-lived radionuclides from spent nuclear fuels

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