Honeywell International Inc.
INTEGRATED PROCESSES FOR PRODUCING BIS(FLUOROSULFONYL) IMIDE

Abstract:

A process for producing bis(fluorosulfonyl) imide includes providing a solution comprising fluorosulfonic acid and urea, the solution maintained at a solution temperature from about 0.degree. C. to about 70.degree. C.; reacting the solution in the presence of a reaction medium at a reaction temperature from 80.degree. C. to about 170.degree. C. to produce a product stream including bis(fluorosulfonyl) imide, ammonium fluorosulfate and the reaction medium; separating the ammonium fluorosulfate from the product stream to produce an intermediate product stream; and separating the intermediate product stream into a concentrated product stream and a first recycle stream, the concentrated product stream including a higher concentration of bis(fluorosulfonyl) imide than the first recycle stream.