Method of separating acid

Details Method of separating acid Method of separating acid

2008-09-09

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

10477198

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.

REFERENCES:
patent: 2645649 (1953-07-01), Hoffman
patent: 2836622 (1958-05-01), Tullock
patent: 4629610 (1986-12-01), Friese et al.
patent: 4640831 (1987-02-01), DeVries
patent: 5360928 (1994-11-01), Carpino et al.
patent: 5942536 (1999-08-01), Fritz et al.
patent: 5980753 (1999-11-01), Itano et al.
patent: 1007288 (1963-09-01), None
patent: 49-96996 (1974-09-01), None
patent: 54-158396 (1979-12-01), None
patent: 57-164991 (1982-10-01), None
patent: 58-192852 (1983-11-01), None
patent: 59-39705 (1984-03-01), None
patent: 04-227706 (1992-08-01), None
patent: 4-227706 (1992-08-01), None
patent: 5-213812 (1993-08-01), None
patent: 8-231462 (1996-09-01), None
patent: 11-116216 (1999-04-01), None
patent: 2000-301006 (2000-10-01), None
patent: WO 96/19425 (1966-06-01), None
patent: WO 02/098792 (2002-12-01), None
Cao et al. Applied and environmental microbiology 1996, vol. 62, No. 8, pp. 2926-2931.
Olah et al; “Poly-4-yinylpyridinium Poly (Hydrogen Fluoride): A Solid Hydrogen Fluoride Equivalent Reagent”;Synthesis, 1993; pp. 693-699.
International Search Report dated Sep. 3, 2002.
European Office Action dated May 15, 2008.

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