Patent ID: 7569738
Filing Date: 2009-08-04
Classification: B01J,C07C,Y02P

Abstract:
1. A method comprising providing a reaction vessel loaded with a dehydrogenation catalyst with a feedstream via a first conduit in operable communication with the reaction vessel, the feedstream comprising an alkyl aromatic hydrocarbon and the dehydrogenation catalyst adapted to convert the alkyl aromatic hydrocarbon to a vinyl aromatic hydrocarbon, and contacting the feedstream with an aqueous catalyst life extender comprising potassium acetate in the first conduit, wherein the aqueous catalyst life extender enters the first conduit via a second conduit having a diameter of less than about ¼ inches at a linear velocity sufficient to prevent vaporization of the catalyst life extender in the first conduit prior to contact with the feedstream, wherein the feedstream is passing through the first conduit at a velocity of greater than about 20 ft/s.