Cargill Inc.

Urtek, LLC

Colin Weyrauch

Xiangsheng Meng

Karin Helene Soldenhoff

Jessica Mary Page

James Andrew Davidson

Marcus Worsley Richardson

Bryn Llywelyn Jones

Paul Robert Kucera

Mark S Chalmers

Peter Douglas Macintosh

Don M Clark

Nicholas Warwick Bristow

Nick Lynn

Thomas Charles Pool

Kelvin John Taylor

Paris Tsobanakis

Alan Peacock

A process for the extraction of uranium compounds from wet-process phosphoric acid includes lowering the iron concentration of the wet-process phosphoric acid and reducing the valency of any remaining ferric iron in the wet-process phosphoric acid to ferrous iron, and then extracting uranium compounds from the wet-process phosphoric acid. The process can include separating a side stream from a feed stream of wet-process phosphoric acid, wherein the side stream has a greater concentration of the uranium compounds than the feed stream by filtration. Extracting uranium compounds from the wet-process phosphoric acid can be by ion exchange process or by solvent extraction.

Extraction of uranium from wet-process phosphoric acid

Phosphate rock is reacted with phosphoric acid to produce monobasic calcium phosphate. Monobasic calcium phosphate is reacted with ammonium carbonate to produce ammonium phosphate. Dibasic calcium phosphate is also produced as a by-product when monobasic calcium phosphate reacting with ammonium carbonate. The dibasic calcium phosphate is reacted with sulfuric acid to produce phosphoric acid. The phosphoric acid is used to react with phosphate rock. Ammonium sulfate or ammonium hydroxide may be used instead of ammonium carbonate. Phosphate other than ammonium phosphate can be produced if calcium phosphate is reacted with x-y to produce x-phosphate, where x is lithium, sodium, ammonium or potassium and y is carbonate, bicarbonate hydroxide or sulfate.

Process for producing high purity phosphates

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Brandon, FL, United States of America

Colin Weyrauch