Recovery from Te

Recovery from Elemental Te(169). The tellurium was dissolved in a mixture of chromium(VI) oxide and concentrated sulfuric acid or in one of potassium dichromate and the acid. The periodate formed was reduced to elemental iodine by oxalic acid and the iodine distilled into a solution containing sulfite or thiosulfate. The iodide in solution was oxidized with permanganate and then reduced to the free condition with oxalic acid. The element was again distilled into a reducing solution. Yields up to 90% were obtained. 

Alternatively, the oxidizing medium in the first step of the procedure can be a mixture of 30% hydrogen peroxide and concentrated sulfuric acid. In this case, iodine is converted directly to the free element. 

Recovery from Te02 (169). (a) The dioxide was dissolved in aqueous sodium hy- 

Recovery from Mg TeOg (360). The Irradiated tellurate was dissolved in dilute 

Because of the medical applications of the isotope, the development of I generators is of considerable interest and such generators are discussed below. 

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