Thallium extraction process
AssigneeMetaleurop S.A.
InventorsLuc Albert, Herve Masson
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Abstract
The invention relates to a process for extracting thallium present especially in aqueous wastes of industrial origin. The process, which makes it possible to extract and recover thallium from a solution which contains it in the form of a salt of a strong inorganic acid, comprises a stage of bringing the said solution into contact with an ion exchange resin containing a thiol group. This process exhibits good selectivity in relation to salts of metals or metalloids which are usually present in industrial aqueous wastes.
Claims8
A process for extracting and recovering thallium from a solution which contains said thallium in the form of salts of strong inorganic acids and salts selected from the group consisting of zinc, cadmium, nickel, cobalt, lead, bismuth and arsenic salts, wherein wherein said solution has a redox potential which is maintained at a reducing level, which process comprises a step of bringing the said solution into contact with an ion exchange resin containing a thiol group.
Dependencies are inferred from the claim text.