Method for removing thallium from a zinc-containing solution

Details Method for removing thallium from a zinc-containing solution Method for removing thallium from a zinc-containing solution

C - Chemistry, Metallurgy

22

B

C22B 3/24 (2006.01) C22B 61/00 (2006.01)

Patent

CA 2518250

This invention relates to a method for removing thallium from a zinc- containing solution. In particular, the method relates to the purification with metallic zinc powder of a solution going to the electrolytic production of zinc. In this method, thallium is removed by means of a lead compound in the solution purification stage, either during the final purification stage or in a purification stage in which cadmium is precipitated.

Cette invention concerne un procédé permettant d'extraire du thallium d'une solution contenant du zinc. Plus particulièrement, le procédé décrit dans cette invention concerne la purification, au moyen d'une poudre de zinc métallique, d'une solution utilisée dans la production électrolytique de zinc. Dans ce mode de réalisation, le thallium est extrait au moyen d'un composé de plomb lors de l'étape de purification de la solution, soit pendant l'étape de purification finale, soit pendant une étape de purification durant laquelle du cadmium est précipité.

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