Method of separation and recovery of elements from...

Details Method of separation and recovery of elements from... Method of separation and recovery of elements from...

2005-01-18

2005-01-18

Barry, Chester T. (Department: 1724)

Liquid purification or separation

Processes

Ion exchange or selective sorption

Reexamination Certificate

active

06843921

ABSTRACT:
A method of separation and recovery of elements from radioactive liquid wastes, includes a step of bringing into contact a high-level radioactive liquid waste containing separation target elements including Americium, Curium, Zirconium, Molybdenum, Palladium and rare earth elements with solid absorbent containing organophosphorus compounds so that the separation target elements are absorbed in the solid absorbent, a step of bringing into contact the solid absorbent with an acidic solution containing diethylenetriaminepentaacetic acid so that Americium, Curium, Zirconium, Molybdenum, Palladium and heavy rare earth elements are eluted from the solid absorbent, and a step of bringing into contact the solid absorbent underwent the first elution step with water or dilute nitric acid so that light rare earth elements are eluted from the solid absorbent. With the method, elements, which include Americium, Curium, Zirconium, Molybdenum, Palladium and rare earth elements, are efficiently and economically separated and recovered from the radioactive liquid waste.

REFERENCES:
patent: 5863439 (1999-01-01), Dietz et al.
patent: 6270737 (2001-08-01), Zaitsev et al.
patent: 1 455 095 (1976-11-01), None
patent: 09-80194 (1997-03-01), None
patent: 9-113689 (1997-05-01), None

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