Method for separating uranium (VI) from actinides(IV) and/or...

Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Radioactive metal

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C423S002000, C423S003000, C423S009000, C423S010000, C423S011000, C423S012000, C423S015000, C423S249000, C423S250000, C423S251000, C423S254000, C423S306000, C423S314000, C423S326000, C423S606000, C423S617000, C423S635000, C423S641000, C252S643000, C204S157150, C588S018000

Reexamination Certificate

active

07622090

ABSTRACT:
The invention relates to a method for separating uranium(VI) from one or more actinides selected from actinides(IV) and actinides(VI) other than uranium(VI), characterized in that it comprises the following steps:a) bringing an organic phase, which is immiscible with water and contains the said uranium and the said actinide or actinides, in contact with an aqueous acidic solution containing at least one lacunary heteropolyanion and, if the said actinide or at least one of the said actinides is an actinide(VI), a reducing agent capable of selectively reducing this actinide(VI); andb) separating the said organic phase from the said aqueous solution.Applications: reprocessing irradiated nuclear fuels, processing rare-earth, thorium and/or uranium ores.

REFERENCES:
patent: 3890224 (1975-06-01), Weiss et al.
patent: 4196136 (1980-04-01), Knoth, Jr.
patent: 4659551 (1987-04-01), Kolarik et al.
patent: 4787979 (1988-11-01), Kolarik et al.
patent: 5364568 (1994-11-01), Pope et al.
patent: 5609745 (1997-03-01), Adnet et al.
patent: 6413482 (2002-07-01), Baranov et al.
patent: 2 731 717 (1996-09-01), None
Pochon et al. (Physical Chemistry Chemical Physics; vol. 2, pp. 3813-3818; 2000).
Andrew J. Gaunt et al (The Structural and Spectroscopic Characterization of a Neptunyl Polyoxometalate Complex, Journal American Chemical Society, vol. 124 pp. 13350-13351, 2002).
Zhou et al (Kinetic Studies on the oxidation of Uranium(IV) in Nitric Acid Solution, Journal Radioanalytic Nuclear Chemistry, Lettters 188 (3) pp. 177-187, 194).
Taylor et al (The Oxidation of Neptunium(IV) by nitric acid in 100% TBP and diluted TBP
-dodecane solutions, Journal of Alloys and Compounds, 271-273, pp. 817-820, 1998).
The Merck Index, Merck & Co., Inc., Whitehouse Station, NewJersey, USA, 2006, Reference Page for Nitric Acid.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method for separating uranium (VI) from actinides(IV) and/or... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for separating uranium (VI) from actinides(IV) and/or..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for separating uranium (VI) from actinides(IV) and/or... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-4134882

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.