Chemistry of hydrocarbon compounds – Aromatic compound synthesis – By alkyl or aryl transfer between molecules – e.g.,...
Reexamination Certificate
2008-10-10
2010-02-16
Dang, Thuan Dinh (Department: 1797)
Chemistry of hydrocarbon compounds
Aromatic compound synthesis
By alkyl or aryl transfer between molecules, e.g.,...
C585S470000
Reexamination Certificate
active
07663010
ABSTRACT:
This disclosure relates to a catalyst system adapted for transalkylation a C9+ aromatic feedstock with a C6-C7aromatic feedstock, comprising: (a) a first catalyst comprising a first molecular sieve having a Constraint Index in the range of 3-12 and 0.01 to 5 wt. % of at least one source of a first metal element of Groups 6-10; and (b) a second catalyst comprising a second molecular sieve having a Constraint Index less than 3 and 0 to 5 wt. % of at least one source of a second metal element of Groups 6-10, wherein the weight ratio of the first catalyst over the second catalyst is in the range of 5:95 to 75:25 and wherein the first catalyst is located in front of the second catalyst when they are brought into contacting with the C9+ aromatic feedstock and the C6-C7aromatic feedstock in the present of hydrogen.
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Dang Thuan Dinh
ExxonMobil Chemical Patents Inc.
Griffis Andrew B.
LandOfFree
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