Chemistry of hydrocarbon compounds – Aromatic compound synthesis – Having alkenyl moiety – e.g. – styrene – etc.
Reexamination Certificate
2008-09-26
2009-08-04
Dang, Thuan Dinh (Department: 1797)
Chemistry of hydrocarbon compounds
Aromatic compound synthesis
Having alkenyl moiety, e.g., styrene, etc.
C585S440000
Reexamination Certificate
active
07569738
ABSTRACT:
Methods and systems for extending the life of a dehydrogenation catalyst are described herein. For example, one embodiment includes providing a reaction vessel loaded with a dehydrogenation catalyst with a feedstream via a conduit in operable communication with the reaction vessel. The feedstream may include an alkyl aromatic hydrocarbon and the dehydrogenation catalyst may be adapted to convert the alkyl aromatic hydrocarbon to a vinyl aromatic hydrocarbon. The feedstream may be contacted with an aqueous catalyst life extender, wherein the aqueous catalyst life extender enters the conduit at a linear velocity sufficient to prevent vaporization of the catalyst life extender in the conduit prior to contact with the feedstream.
REFERENCES:
patent: 5739071 (1998-04-01), Chen et al.
Butler Jim
Ledoux Marcus
Merrill Jim
Persick Clint
Rabalais Ashley
Dang Thuan Dinh
Fina Technology, Inc.
Krueger Tenley R.
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