Regeneration of ionic liquid catalyst using a metal in the absence of added hydrogen
AssigneeChevron U.S.A. Inc.
InventorsSaleh Elomari, Thomas V. Harris, Hye Kyung C. Timken, Steven E. Trumbull
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Abstract
A process for regenerating a used acidic ionic liquid catalyst comprising contacting the used ionic liquid catalyst with at least one metal in a regeneration zone in the absence of added hydrogen under regeneration conditions for a time sufficient to increase the activity of the ionic liquid catalyst is described. In one embodiment, regeneration is conducted in the presence of a hydrocarbon solvent.
Claims24
A process for regenerating a used acidic ionic liquid catalyst, comprising:
- a. removing the used acidic ionic liquid catalyst from a reaction zone in which said catalyst was used;
- and
- b. contacting at least a portion of the used acidic ionic liquid catalyst with at least one metal in a regeneration zone in the absence of added hydrogen under regeneration conditions for a time sufficient to increase the activity of the used acidic ionic liquid catalyst for alkylation.
A process for regenerating a used acidic ionic liquid catalyst which has been deactivated by conjunct polymers, comprising:
- removing the used acidic ionic liquid catalyst from a reaction zone and contacting the removed used acidic ionic liquid catalyst with at least one metal in a regeneration zone in the absence of added hydrogen under regeneration conditions in the presence of an inert hydrocarbon in which conjunct polymers are soluble for a time sufficient to increase the activity of the used acidic ionic liquid catalyst.
Dependencies are inferred from the claim text.