Purification of tellurium by ionic liquid-liquid extraction

Reference number 2017-05471
Coordinator Luleå tekniska universitet - Avdelningen för kemiteknik
Funding from Vinnova SEK 500 000
Project duration June 2018 - December 2018
Status Completed
Venture The strategic innovation programme for mining and metal recovery – STRIM
Call STRIM - gruv och metallutvinning

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.

The project description has been provided by the project members themselves and the text has not been examined by our editors.