Chemistry of hydrocarbon compounds – Aromatic compound synthesis – By ring formation from nonring moiety – e.g. – aromatization,...
Reexamination Certificate
2006-12-20
2010-06-29
Dang, Thuan D (Department: 1797)
Chemistry of hydrocarbon compounds
Aromatic compound synthesis
By ring formation from nonring moiety, e.g., aromatization,...
C585S419000, C585S904000, C502S035000, C502S037000, C502S038000, C502S053000, C502S055000
Reexamination Certificate
active
07745675
ABSTRACT:
This invention relates to a process for regeneration of a zeolite catalyst, specifically an aluminosilicate zeolite with germanium substituted in the framework for silicon and with platinum deposited on the zeolite. The catalyst may be used in a process for aromatization of alkanes, specifically C2-C8alkanes. The regeneration process 1) removes coke and sulfur from the catalyst via oxidation, 2) redisperses platinum on the surface of the catalyst via chlorine gas, 3) removes chlorine and bind Pt to the surface of the zeolite by steaming, 4) reduces the catalyst in hydrogen, and 5) optionally, resulfides the catalyst. The zeolite may be a MFI zeolite. The catalyst may be bound with an inert material which does not act as a binding site for platinum during the regeneration process, for example, silica.
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Ellis Paul E.
Juttu Gopalakrishnan G.
Khanmamedova Alla K.
Mitchell Scott F.
Stevenson Scott A.
Dang Thuan D
Saudi Basic Industries Corporation
Wheelington Jim
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