Hydrocracking process utilizing aqueous ammonia
AssigneeUop LLC
InventorVernon L. Mallett
Life of this patent
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Abstract
A process for controlling hydrocracking reactions in a hydrocracking reactor by passing aqueous ammonia to the hydrocracking reactor. The aqueous ammonia is injected into the process at various locations at a low pressure, typically between approximately 0.17 to approximately 2.07 MPa (25 to 300 psi). A wash fluid can be used to lower the concentration of ammonia in the hydrocracking reactor, and thus, increase the catalytic activity of the hydrocracking catalyst.
Claims18
A process for controlling an activity of a hydrocracking catalyst in a hydrocracking reaction zone, the process comprising:
- passing an aqueous ammonia stream into a hydrocracking reaction zone having an acidic hydrocracking catalyst, wherein a pressure of the aqueous ammonia stream when injected is between approximately 0.17 to approximately 2.07 MPa (25 to 300 psi) and reducing an ammonia concentration in the hydrocracking reaction zone with a wash fluid.
A process for maintaining a temperature of a hydrocracking reaction zone, the process comprising:
- hydrocracking hydrocarbons in the presence of hydrogen and an acidic hydrocracking catalyst in a hydrocracking reaction zone;
- inhibiting the hydrocracking of the hydrocracking reaction zone by inhibiting acid sites on the acidic hydrocracking catalyst with ammonia,
- wherein the ammonia is an aqueous ammonia having an initial pressure of between approximately 0.17 to approximately 2.07 MPa (25 to 300 psi);
- and
- reducing an ammonia concentration in the hydrocracking reaction zone with a wash fluid.
A process for hydrocracking hydrocarbons, the process comprising:
- hydrocracking a portion of hydrocarbons in a feed stream in the presence of hydrogen and an acidic hydrocracking catalyst in a hydrocracking reaction zone;
- passing a stream of aqueous ammonia having an initial pressure between approximately 0.17 to approximately 2.07 MPa (25 to 300 psi) to the hydrocracking reaction zone;
- and decreasing an amount of aqueous ammonia passed to the hydrocracking reaction zone to increase the hydrocracking reactions by reducing an ammonia concentration to the hydrocracking reaction zone with a wash fluid.
Dependencies are inferred from the claim text.