J.r. Simplot Company

Gary Long

Klaas Jan Hutter

David K Johnson

Gene Kawakami

An apparatus for removing vanadium from phosphoric acid includes a precipitator that receives vanadium-containing process-feed phosphoric acid and adds an oxidant to the process-feed phosphoric acid, whereupon precipitates containing phosphorus and vanadium are formed in a phosphoric acid filter feed slurry. The solid precipitate is removed by a filter. The filtrate, after optional further oxidation, is contacted to an ion exchange resin to remove additional vanadium from the filtrate to produce a phosphoric acid product of reduced vanadium content. A first portion of the phosphoric acid product is removed from the apparatus for further use. A reducing agent is added to a second portion of the phosphoric acid product, and the reduced acid is used to strip vanadium from the loaded ion exchange resin. The vanadium-loaded second portion of the phosphoric acid is mixed with fresh phosphoric acid and fed to the precipitator. The phosphoric acid in the precipitator has a phosphate content of from about 40-45 percent, and at least a portion of the phosphoric acid in the precipitator is produced by diluting more concentrated phosphoric acid to the 40-45 percent phosphate range.

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Inkom, ID, United States of America

Gary Long