Claims
- 1. A process for the preparation of a bis(fluoroalkylsulfonyl)imide salt comprising the step of reacting at least two equivalents of a fluoroalkylsulfonyl halide (wherein the fluoroalkyl is substantially fluorinated) with one equivalent of ammonia and at least three equivalents of a non-nucleophilic base at a temperature and for a time sufficient to yield the imide salt, provided that if the fluoroalkylsulfonyl halide is a perfluoroalkylsulfonyl halide, the alkyl group has at least 2 carbon atoms.
- 2. The process of claim 1 where the ammonia is generated in situ by the reaction of an ammonium salt with a non-nucleophilic base.
- 3. The process of claim 1 characterized by the reaction scheme
- 2Z--R.sub.f SO.sub.2 X+NH.sub.3 +3B(Z--R.sub.f SO.sub.2).sub.2 N.sup.-.BH.sup.+ +2B.HX,
- where R.sub.f is a fluoroalkylene group optionally containing catenary oxygen or nitrogen, X is a halogen atom, B is a non-nucleophilic base, and Z is a fluorine atom or a polymerizable organic functional group.
- 4. The process of claim 3 further comprising contacting the bis(fluoroalkylsulfonyl)imide salt with an inorganic base having an alkali metal cation M.sup.+, volatilizing the non-nucleophilic base B, and isolating the resulting bis(fluoroalkylsulfonyl)imide salt of the formula (Z--R.sub.f SO.sub.2).sub.2 N.sup.-.M.sup.+ by filtration, evaporating volatile components from the residue, followed by solvent extraction of the filtrate and removal of the solvent.
- 5. A process for preparing a bis(fluoroalkylsulfonyl)imide which comprises contacting a sulfonamidofluoroalkylenesulfonyl halide of the formula X--SO.sub.2 --R.sub.f --SO.sub.2 NH.sub.2 with a non-nucleophilic base at a temperature and for a time sufficient to produce a polymeric fluoroalkylsulfonimide having the repeat unit .paren open-st.SO.sub.2 --R.sub.f --SO.sub.2 N.sup.- .paren close-st..sub.n, wherein n is an integer greater than 1 and X is a halogen atom.
- 6. A process for preparing a polymeric fluoroalkylsulfonimide comprising a reaction step characterized by the reaction scheme:
- H.sub.2 NSO.sub.2 --R.sub.f --SO.sub.2 NH.sub.2 +X--SO.sub.2 --R'.sub.f --SO.sub.2 --X+4B.paren open-st.SO.sub.2 --R.sub.f --SO.sub.2 N.sup.- --SO.sub.2 --R'.sub.f N.sup.-).sub.n 2BH.sup.+ +2B.HX,
- wherein n is an integer greater than 1 and X is a halogen atom.
- 7. A process for preparing a polymeric fluoroalkylsulfonimide comprising a reaction step characterized by the reaction scheme:
- X--SO.sub.2 --R.sub.f --SO.sub.2 --X+NH.sub.3 +3B.paren open-st.SO.sub.2 --R.sub.f --SO.sub.2 --N.sup.- .paren close-st..sub.n +2B.HX,
- wherein n is an integer greater than 1, R.sub.f is a fluoroalkylene group, B is a non-nucleophilic base and X is a halogen atom.
- 8. The process of claim 7 wherein the ammonia is generated in-situ by the reaction of an ammonium salt with a non-nucleophilic base.
Parent Case Info
This application is a continuation-in-part of application Ser. No. 08/398,859 filed Mar. 6, 1995, now U.S. Pat. No. 5,514,493.
US Referenced Citations (18)
Foreign Referenced Citations (5)
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Continuation in Parts (1)
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Number |
Date |
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Parent |
398859 |
Mar 1995 |
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