Title: Recovery of fluorine, uranium and rare earth metal values from phosphoric acid by-product brine raffinate

Abstract: A method for recovering substantially all of the fluorine and uranium values and at least 90 percent of the rare earth metal values from brine raffinate obtained as by-product in the production of phosphoric acid by the hydrochloric acid decomposition of tricalcium phosphate minerals. A basically reacting compound is added to the brine raffinate to effect a pH of at least about 9, whereby fluorine, uranium and rare earth metal values are simultaneously precipitated therefrom. These values may then be separately recovered from the precipitate by known processes.

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Inventors: Wamser, Christian A. (Camillus, NY, US)
Bruen, Charles P. (Bernardsville, NJ, US)

Application Number: 444211
Filing Date: 1974-02-21
Publication_date: 1976-02-10
Assignee: Allied Chemical Corporation (New York, NY)
Primary Class(es): 423/8 423/11, 423/18, 423/21.1, 423/157.3, 423/319, 423/321.2
Other Classes:
US Patent Ref:

2797143	Jun, 1957	Arendale et al.	423/18.
2859092	Nov, 1958	Bailes et al.	423/7.
2869979	Jan, 1959	Grinstead	423/7.
2926992	Jul, 1960	Stedman	423/18.
3338674	Aug, 1967	Daniel et al.	423/167.
3790658	Feb, 1974	Fox et al.	423/18.
3842155	Oct, 1974	Muller et al.	423/18.

Other Refs:
Primary Examiner: Padgett, Benjamin R.
Assistant Examiner: Miller, E. A.
Attorney: Fuchs; Gerhard H., Murray, Jr.; Jack B.