Mineral oils: processes and products – Chemical conversion of hydrocarbons – Solids contacting and mixing
Reexamination Certificate
2008-06-24
2008-06-24
Caldarola, Glenn (Department: 1797)
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Solids contacting and mixing
C208S146000, C222S129000, C222S135000, C222S142000, C422S145000
Reexamination Certificate
active
07390396
ABSTRACT:
The invention is a catalyst injection system and method for injecting catalyst. In one embodiment, a fluid catalytic injection system includes vessel configured to store one or more catalysts, a pressure transmitter, a pressure control valve, a discharge valve, and a controller. The pressure control valve is coupled to the vessel and regulates the gas pressure therein. The discharge valve is coupled to the vessel and controls a discharge of catalyst from the vessel. The pressure transmitter provides a metric of pressure to the controller as an input. The controller contains instructions, that when executed, prevents the simultaneous opening of the pressure control valve and the discharge valve. In another embodiment, a method for injecting catalyst into a fluid catalytic cracking unit is provided. The method includes regulating pressure within a catalyst storage vessel, changing an amount of catalyst in the storage vessel, and preventing a simultaneous occurrence of the regulating and changing steps.
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“IMS to Control Room”, Dwg S-29, Sheet 1, Intercat, Savannah, Georgia, Nov. 26, 2001.
Elliott Eric
Evans Martin
Boyer Randy
Caldarola Glenn
Chowdhury Tanzina
Intercat Equipment, Inc.
Patterson & Sheridan LLP
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