LABORATORY DEVELOPMENT OF THE THOREX PROCESS. Progress Report for February 1, 1953 to July 31, 1953

TL;DRAbstract

Laboratory-scale studies on the Thorex process, February 1 -July 31, 1953, have led to the recommendation that excess acid be removed from the organic stream in a slightly longer B-column with very dilute nitric acid rather than in a separate column with "acid-deficient" aluminum nitrate as formerly.A head-end evaporation-reflux treatment of the feed is recommended to prevent loss of thorium, to coagulate colloidal siliceous material and thus minimize emulsions in later steps, and to 233 decrease the ruthenium in the product stream.Pa adsorption by silica gel was inhibited by niobium, ferric, or chromic ions.

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