Treatment process for removing radioactive thorium from...

Details Treatment process for removing radioactive thorium from... Treatment process for removing radioactive thorium from...

2006-01-31

2006-01-31

Cintins, Ivars C. (Department: 1724)

Liquid purification or separation

Processes

Ion exchange or selective sorption

C210S682000, C210S694000

Reexamination Certificate

active

06991731

ABSTRACT:
The liquid effluent from solvent extraction contains radioactive thorium Th-231 and Th-234. This invention uses an ion exchange process to remove and concentrate the thorium. The process is designed so that the thorium remains on the ion exchange column until it decays to uranium and protactinium. These decay products are subsequently replaced by additional thorium. Therefore, the thorium never reaches break-through and the column can be used continuously without regeneration.

REFERENCES:
patent: 2894827 (1959-07-01), Hyde et al.
patent: 2898185 (1959-08-01), Boyd et al.
patent: 4196081 (1980-04-01), Pavia
patent: 4320093 (1982-03-01), Volesky et al.
patent: 4501691 (1985-02-01), Tanaka et al.
patent: 4765909 (1988-08-01), Rourke et al.
patent: 4943318 (1990-07-01), Rushton
patent: 5854968 (1998-12-01), Horwitz et al.
patent: 0 527 096 (1993-02-01), None
patent: 0 527 096 (1993-02-01), None
patent: 2 144 111 (1995-02-01), None
Alhassanieh, O., et al., “Separation of Th, U, Pa, Ra and Ac from Natural Uranium and Thorium Series”, Applied Radiation and Isotopes, 51 (1999) 493-498.
Crespi, Caramella V., et al, “Separation of Traces of Thorium from Lage Amounts of Uranium, by Adsorption on Lanthanum-Ammonium Oxalate”, Applied Radiation and Isotopes, 51 (1999) 353-357.

Affiliated with

Also associated with

Rating

Treatment process for removing radioactive thorium from... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Treatment process for removing radioactive thorium from..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Treatment process for removing radioactive thorium from... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3532503