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The extraction of thorium from nitric acid solutions into xylene solutions of a quaternary ammonium salt (Aliquat-336) has been investigated. Aliquat-336 presenta a high affinity for thorium with a maximum of extraction in the range 3-4 M HNO 3 .

The Extraction of Thorium from Nitric Acid Solutions by a Quaternary Ammonium Nitrate (Aliquat-336)