Lithium extraction from Dieng geothermal brine using solvent extraction – A preliminary study

This preliminary study aims to obtain the lithium compounds from a geothermal brine through solvent extraction. The samples were collected PT Geodipa Energi Geothermal Power Plant in Dieng, Central Java, Indonesia. ICP analysis was conducted measure chemical composition. Brine’s content 62.73 ppm with dominant impurities silica (Si), calcium (Ca), potassium (K), sodium (Na), and boron (B). Silica removal by centrifugation technic addition of flocculants, while achieved adding carbonate. CYANEX® 936P used for extraction process diluted kerosene (1:1 O/A ratio). pH adjusted 10% H2SO4 solution (acid condition) NH4OH (alkaline condition). optimum condition observed at = 11, highest recovery 90%. eluate stripping then precipitated Na2CO3 produce carbonate powder.