Hydrochloric acid stripping process for ionic liquid regeneration process
AssigneeUop LLC
InventorsMichael Brendel, Avram M. Buchbinder, Paul Olson, Susie C. Martins, Kaitlin M. DeSalvo, Douglas A. Nafis
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Abstract
A method for regenerating deactivated acidic ionic liquid is described. The method involves reducing a level of free hydrochloric acid in the deactivated acidic ionic liquid in a removal zone using at least one of heat, a stripping fluid, reduced pressure, and liquid-liquid extraction to form a deactivated acidic ionic liquid having a reduced level of free hydrochloric acid; and regenerating the deactivated acidic ionic liquid having the reduced level of free hydrochloric acid.
Claims20
A method for regenerating deactivated acidic ionic liquid catalyst from an ionic liquid catalyzed process, comprising the steps of:
- (a) withdrawing an effluent comprising hydrocarbon product and deactivated acidic ionic liquid catalyst from a reaction zone;
- (b) separating the effluent from step (a) into at least a hydrocarbon phase and an ionic liquid phase comprising at least a portion of the deactivated acidic ionic liquid catalyst;
- (c) directing at least a portion of the ionic liquid phase from step (b) to a hydrochloric acid removal zone;
- (d) reducing a level of free hydrochloric acid in the ionic liquid phase from step (b) in the hydrochloric acid removal zone using at least one of heat, a stripping fluid, reduced pressure, and liquid-liquid extraction to form a deacidified ionic liquid phase, wherein the deacidified ionic liquid phase has a reduced level of free hydrochloric acid compared to the free hydrochloric acid in the ionic liquid phase of step (b);
- (e) directing the deacidified ionic liquid phase from step (d) to an ionic liquid regeneration zone to produce a regenerated ionic liquid catalyst;
- (f) returning the regenerated ionic liquid catalyst to the reaction zone.
A method for regenerating deactivated acidic ionic liquid catalyst from an ionic liquid catalyzed process, comprising the steps of:
- (a) withdrawing an effluent comprising hydrocarbon product and deactivated acidic ionic liquid catalyst from a reaction zone;
- (b) separating the effluent from step (a) into at least a hydrocarbon phase and an ionic liquid phase comprising at least a portion of the deactivated acidic ionic liquid catalyst;
- (c) directing at least a portion of the ionic liquid phase from step (b) to a hydrochloric acid removal zone;
- (d) reducing a level of free hydrochloric acid in the ionic liquid phase from step (b) in the hydrochloric acid removal zone using at least one of heat, a stripping fluid, reduced pressure, and liquid-liquid extraction to form a deacidfied ionic liquid phase, wherein the deacidified ionic liquid phase has a reduced level of free hydrochloric acid compared to the free hydrochloric acid in the ionic liquid phase of step (b);
- (e) withdrawing a stream comprising removed hydrochloric acid from the hydrochloric acid removal zone in step (d);
- (f) contacting the deacidified ionic liquid phase from step (d) with at least one silane or borane compound, the conjunct polymer reacting with the at least one silane or borane compound resulting in a catalyst phase comprising ionic liquid catalyst and an organic phase containing the conjunct polymer and at least one silyl or boryl compound;
- and
- (g) separating the catalyst phase from the organic phase.
Dependencies are inferred from the claim text.