Synthesis of tetrabutylammonium bis(fluorosulfonyl)imide and related salts
AssigneeTrinapco, Inc.
InventorMartin Reid Johnson
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Abstract
The present invention is directed to methods comprising adding ammonia, either as an ammonium salt or as a gas at pressures below 0.01 MPa, to a sulfuryl fluoride solution to form the anion of bis(fluorosulfonyl)amine under conditions well suited for large-scale production. The bis(fluorosulfonyl)amine so produced can be isolated by methods described in the prior art, or isolated as an organic ion pair, such as an alkylammonium solid salt, or as an ionic liquid.
Claims20
A process for producing a salt of bis(fluorosulfonyl) imide anion (Mx+m[(FSO2)2N−]n, wherein M+ is an inorganic or organic cation and x, n and m are integers from 1-4, comprising:
- adding sulfuryl fluoride (SO2F2) to solid ammonium fluoride in a solvent in a reactor, in the presence of an aprotic base;
- and
- isolating said salt.
A process for producing a salt of bis(fluorosulfonyl) imide anion (Mx+m[(FSO2)2N−]n, wherein M+ is an inorganic or organic cation and x, n and m are integers from 1-4, comprising:
- mixing sulfuryl fluoride (SO2F2), solid ammonium fluoride, a solvent and an aprotic base in a sealed reactor;
- and
- isolating said salt.
Dependencies are inferred from the claim text.