Method of separating acid

Details Method of separating acid Method of separating acid

2002-05-30

2008-09-09

Eyler, Yvonne (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic halides

C562S840000, C562S849000, C562S856000

Reexamination Certificate

active

07423174

ABSTRACT:
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):in-line-formulae description="In-line Formulae" end="lead"?RCOF  (I)in-line-formulae description="In-line Formulae" end="tail"?wherein R is a fluorine atom; a C1-20linear, branched or cyclic alkyl or halogenated alkyl group that may contain a heteroatom; or a C6-20aryl 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.

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