PROCESS FOR RECOVERING IONIC LIQUIDS SPENT BY EXTRACTIVE DESULFURIZATION OF NAPHTHAS.

摘要

The present invention is related to the application of a process for recovering spent ionic liquids containing organic cations of the following types: alkyl-pyridinium, di-alkyl imidazolium, tri-alkyl imidazolium; whereas the anion A- is represented by FeCI4]-, [FeBrCl3]-, Br- [AICI4]-, [AIBrCI3]-, Cl-. This process is applied in continuous cycles of desulphurization-recovery (from 1 to 5) with ionic liquids containing metalate anions, and the recovery of ionic liquids with chloride and bromide anions. The efficiency in recovering precursor ionic liquids is higher than 85%.