Method of purifying methyl fluoride by removing dimethyl ether

Abstract

A method and system for purifying methyl fluoride (MeF) by removing dimethyl ether (Me2O) using a lithium salt sorbent, such as LiFSI or LiTFSI, are disclosed. Contaminated MeF is contacted with the sorbent, which preferentially adsorbs Me2O due to strong Lewis acid-base interactions, yielding purified MeF. The process may involve flowing through a sorbent bed, cryogenic collection, temperature differentials, or pumping, with optional multiple cycles for enhanced purity. This approach provides superior efficiency and purity compared to conventional methods, with experimental reductions up to 80% in Me2O content. Alternative salts and porous supports are also provided.

Dependencies are inferred from the claim text.