Method of separating acid

摘要

The present invention provides a process for selectively separating HF and like acids present along with water-unstable organic acid fluorides. In particular, the invention provides a process for separating an acid from a system in which the acid and an organic acid fluoride are present, the organic acid fluoride being represented by formula (I): RCOF (I) wherein R is a fluorine atom; a C1-20 linear, branched or cyclic alkyl or halogenated alkyl group that may contain a heteroatom; or a C6-20 aryl or halogenated aryl group that may contain a heteroatom; the process comprising using as a deacidifying agent an aromatic heterocyclic compound having a boiling point of at least 50° C. and having one or more nitrogen atoms as heteroatom.