Global Patent Index - EP 0228940 A1

EP 0228940 A1 19870715 - Process for extracting uranium and/or plutonium IV from an aqueous solution by means of N,N-dialkylamides.

Title (en)

Process for extracting uranium and/or plutonium IV from an aqueous solution by means of N,N-dialkylamides.

Title (de)

Verfahren zum Extrahieren von Uran und/oder Plutonium IV aus einer wässrigen Lösung mittels N,N-Dialkylamiden.

Title (fr)

Procédé d'extraction de l'uranium VI et/ou de plutonium IV presents dans une solution aqueuse au moyen de N,N-dialkylamides.

Publication

EP 0228940 A1 19870715 (FR)

Application

EP 86402671 A 19861202

Priority

FR 8518015 A 19851205

Abstract (en)

[origin: US4772429A] The invention relates to a process for the extraction of uranium (VI) and/or plutonium (IV) present in an aqueous solution by means of N,N-dialkylamides. These N,N-dialkylamides are in accordance with formula: <IMAGE> (I) in which R1 is a straight or branched alkyl radical with 2 to 12 carbon atoms, R2 and R4, which can be the same or different, are straight or branched alkyl radicals with 2 to 6 carbon atoms, R3 and R5, which can be the same or different, are straight or branched alkyl radicals with 1 to 6 carbon atoms and a and b, which can be the same or different, are integers between 1 and 6. For example, it is possible to use N,N-di-(2-ethyl hexyl)-2,2-dimethyl butyramide, N,N-di-(2-ethyl hexyl)-hexanamide or N,N-di-(2-ethyl hexyl)-dodecanamide for simultaneously extracting uranium and plutonium, or for separating the uranium from the plutonium without reducing the latter.

Abstract (fr)

L'invention a pour objet un procédé d'extraction de l'uranium (VI) et/ou du plutonium (IV) présents dans une solution aqueuse au moyen de N,N-dialkylamides. Ces N,N-dialkylamides répondent à la formule : <IMAGE> dans laquelle R¹ est un radical alkyle linéaire ou ramifié de 2 à 12 atomes de carbone, R² et R<4> qui peuvent être identiques ou différents sont des radicaux alkyle linéaires ou ramifiés de 2 à 6 atomes de carbone, R³ et R<5> qui peuvent être identiques ou différents sont des radicaux alkyle linéaires ou ramifiés de 1 à 6 atomes de carbone, et a et b qui peuvent être identiques ou différents sont des nombres entiers allant de 1 à 6. A titre d'exemples, on peut utiliser le N,N-di(éthyl-2 hexyl) diméthyl-2,2 butyramide, le N,N-di(éthyl-2 hexyl) hexanamide ou le N,N-di(éthyl-2 hexyl) dodécanamide, pour extraire simultanément l'uranium et le plutonium ou pour séparer l'uranium du plutonium sans réduire ce dernier.

IPC 1-7

C22B 60/02; C22B 60/04; C01G 43/00; C01G 56/00

IPC 8 full level

G21C 19/46 (2006.01); C01G 43/00 (2006.01); C01G 56/00 (2006.01); C22B 60/02 (2006.01)

CPC (source: EP US)

C22B 60/026 (2013.01 - EP US)

Citation (search report)

  • [A] CHEMICAL ABSTRACTS, vol. 66, 1967, page 5166, résumé no. 54883w, Columbus, Ohio, US; T.H. SIDDALL, III et al.: "Proton magnetic resonance studies and extraction properties of some simple diamides", J. INORG. NUCL. CHEM. 29(1), 149-58(1967)
  • [A] CHEMICAL ABSTRACTS, vol. 101, 1984, page 650, résumé no. 151013m, Columbus, Ohio, US; H.N. AL-JALLO et al.: "Synthesis and properties of some N,N-dialkylamides as new extractants", & J. CHEM. ENG. DATA 1984, 29(4), 479-81
  • [A] CHEMICAL ABSTRACTS, vol. 91, no. 20, 12 novembre 1979, page 398, résumé no. 163698b, Columbus, Ohio, US; C. POHLANDT et al.: "Extraction of metal ions from chloride solution with N,N-dioctylacetamide", & TALANTA 1979, 26(5), 395-9
  • [AD] CHEMICAL ABSTRACTS, vol. 94, 1981, page 419, résumé no. 21894a, Columbus, Ohio, US; G.M. GASPARINI et al.: "Application of N,N-dialkyl aliphatic amides in the separation of some actinides", & SEP. SCI. TECHNOL. 1980, 15(4), 825-44
  • [A] CHEMICAL ABSTRACTS, vol. 72, 1970, page 385, résumé no. 36404k, Columbus, Ohio, US; V.S. SHMIDT et al.: "Extraction of various actinide elements from nitric acid solutions by N,N-dialkyacetamides", & RADIOKHIMIYA 1969, 11(5), 593-5
  • [A] HYDROMETALLURGY, vol. 8, no. 4, juillet 1982, pages 379-388, Elsevier Scientific Publishing Co., Amsterdam, NL; ZHOU TAILI et al.: "The amide type extractant A101 and its application to the separation of niobium and tantalum, and molybdenum and rhenium
  • [A] CHEMICAL ABSTRACTS, vol. 94, 1981, page 422, résumé no. 145962r, Columbus, Ohio, US; V. JEDINAKOVA et al.: "The extraction of lanthanides and americium by benzyldialkyl amides and benzyltrialkylammonium nitrates from the nitrate solutions; structure and aggregation of their salts", & INT. SOLVENT EXTR. CONF., [PROC.] 1980, 1, PAPER 80-185, 8 PP
  • [A] CHEMICAL ABSTRACTS, vol. 94, 1981, page 421, résumé no. 21916j, Columbus, Ohio, US; G.M. GASPARINI et al.: "N,N-dialkyl substituted aliphatic amides as extractants for actinides and fission products: preparation and extractive properties of N,N-di-n-butyl-2-ethylhexanamides and N,N-di-n-hexylocatanamides", & COM- NAZ. ENERG. NUCL., [RAPP. TEC.] CNEN-RT/CHI (ITALY) 1980, CNEN-RT/CHI(80)6, 113 PP.
  • [A] CHEMICAL ABSTRACTS, vol. 89, 1978, page 454, résumé no. 136514r, Columbus, Ohio, US; B.N. LASKORIN et al.: "Extraction of uranium and transuranium elements by carboxylic acid amides", & RADIOKHIMIYA 1978, 20(4), 511-18
  • [A] CHEMICAL ABSTRACTS, vol. 83, 1975, page 553, résumé no. 172086n, Columbus, Ohio, US; J.S. FRITZ et al.: "Extraction of metal ions with N,N-disubstituted amides", & ANAL. CHEM. 1975, 47(12), 2043-5

Designated contracting state (EPC)

DE GB IT

DOCDB simple family (publication)

EP 0228940 A1 19870715; EP 0228940 B1 19900808; DE 3673370 D1 19900913; FR 2591213 A1 19870612; FR 2591213 B1 19880205; JP H06104573 B2 19941221; JP S62143827 A 19870627; US 4772429 A 19880920

DOCDB simple family (application)

EP 86402671 A 19861202; DE 3673370 T 19861202; FR 8518015 A 19851205; JP 28974586 A 19861204; US 93711386 A 19861202