Functionalized solvents for efficient olefin separation based on Ag‐based competitive coordination complexation

Abstract Liquid α ‐olefins are important basic chemical raw materials, and the solvent extraction is one of the effective methods for their separation. In this paper, Ag + is used as the coordinating metal, and , which has a weak interaction with it, is selected as the anion. Based on the interaction between the carbonyl oxygen and −NH 2 , propionamide is selected as the organic ligand. Thus, a deep eutectic solvent of [AgNTf 2 :2propionamide], with a competitive coordination mechanism for the efficient separation of olefins, was proposed. For the 1‐hexene/hexane, the selectivity is up to 215.24, and the olefin removal rate of single‐stage extraction is up to 90.55%. Using ESI‐MS and XAFS, combined with experimental and calculations, the mechanism of competitive coordination and the coordination structure of C 2 ‐Ag‐O 2 were revealed. This solvent can be used to effectively separate olefins from simulated oil, as well as effectively extract and separate unsaturated hydrocarbons such as aromatics/alkanes.