Trolamine Salicylate

The present study investigated the development of two Protic Ionic Liquids (PILs) for the selective extraction and recovery of zinc (Zn) from Jarosite.The synthesis of two hydrophilic (PILs), namely Tri(2-hydroxyethyl) ammonium Salicylate Ionic Liquid (TSIL) and Tri(2-hydroxyethyl) ammonium Lactate Ionic Liquid (TLIL), involves the reaction of triethanolamine with salicylic acid and lactic acid, resp.Hence, due to their hydrophilic nature, these PILs do not require any organic solvent for dilutionSolid-liquid extraction experiments carried out in batch process with various parameters such as stirring time, ammonium solution molarity, liquid-to-solid ratio, and temperature have been examinedBut before extraction, the jarosite sample was roasted in a muffle furnace at 600 °C for 60 min.The fresh and roasted jarosite was characterized by XRF, XRD, SEM, and FTIR techniques.This anal. is to understand the transformation of jarosite during roasting and its impact on physicochem. properties.The synthesis PILs were used to extract selectively Zn from roasted jarosite.The maximum selective extraction of Zn (68.57 % for TSIL and 77.21 % for TLIL) and min. extraction of Fe (0.36 % for TSIL and 0.52 % for TLIL) and Pb (2.25 % for TSIL and 15.34 % for TLIL) at optimum conditions of TSIL (1 Mol/L NH₃, 60 min time, 50 °C temperature and 20 mL/g L/S ratio) and TLIL (0.5 Mol/L NH₃, 90 min time, 40 °C temperature and 15 mL/g L/S ratio).The results show that the TSIL is more suitable for selective Zn extraction than TLIL.The residual concentration of Zn in PILs was recovered by electrochem. depositing it on the copper cathode.After Zn electrodeposition, the remaining PILs were reused with fresh PILs.Therefore, the PILs are effectively used for selective extraction of Zn from jarosite due to lower synthesis costs and being hydrophilic, indicating that the process is cost-effective and sustainable.