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US 6,673,329 B2Granted
Process for preparing fluorosulfonic acid having low contents of low-boiling compounds
AssigneeBayer Aktiengesellschaft
InventorsAndreas Bulan, Michael Batz, Dieter Heinz, Kasper Hallenberger
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Abstract
The invention relates to a novel process for preparing fluorosulfonic acid having low contents of low-boiling compounds in which hydrogen fluoride and sulfur trioxide are combined in stoichiometric amounts in a reaction vessel or by means of a reaction nozzle, the hot, gaseous fluorosulfonic acid that is formed is fed directly into a distillation column, and the fluorosulfonic acid is taken off at the bottom of the column or in the stripping section of the distillation column.
Claims7
A process for preparing fluorosulfonic acid comprising
- (a) combining hydrogen fluoride and sulfur trioxide in stoichiometric amounts in a reaction vessel or by means of a reaction nozzle to form hot, gaseous fluorosulfonic acid,
- (b) feeding the hot, gaseous fluorosulfonic acid directly into a distillation column, and
- (c) taking off the fluorosulfonic acid at the bottom of the column or in the stripping section of the distillation column.
Dependencies are inferred from the claim text.