Purification of tellurium using ionic liquid extraction
Ionic liquid extractionPurificationRecycling and metallurgy
Luleå tekniska universitet
Purpose and goal
The goal with this Project was to find the optimal parameters to be able to purify Te by liquid liquid extractions. Very promissing results were found when using a 10% trioctylamine as a extractant in an aqueous phase comprising a 4M HCl. With the work done in this project the next step would be to develope the process on our pilot plant facility.
Expected results and effects
An evaluation of three different extractants for the purification of Te has been carried out. Optimum conditions for an excellent separation of Te from other impurities were achieved when using 10 % TOA from a 4M HCl solution. Separation of ionic liquid from water was also analysed and achieved at room temperature in a centrifugal extractor.
Planned approach and implementation
Batch liquid liquid extractions to separate Te from other impurities were performed. Metal analysis was done on aqueous phase by means of ICP-OES.