Patent ID: 6656342
Filing Date: 2003-12-02
Classification: B01J,C10G

Abstract:
A method of producing liquid fuels from a Fischer-Tropsch derived hydrocarbon stream, the method comprising:a) providing a hydroprocessing reactor having at least one catalyst bed for relatively severe hydroprocessing and at least one catalyst bed for relatively mild hydroprocessing; b) isolating a heavy fraction and a light fraction from the Fischer-Tropsch derived hydrocarbon stream; c) subjecting the heavy fraction to relatively severe hydroprocessing; d) combining the effluent from the relatively severe hydroprocessing step with the light fraction to form a combined stream; and e) subjecting the combined stream to relatively mild hydroprocessing; wherein at least one of the catalyst beds of the hydroprocessing reactor employs a graded catalyst scheme to remove particulate contaminants from the Fischer-Tropsch derived hydrocarbon stream.