Exxonmobil Research and Engineering Company

Exxonmobil Chemical Patents Inc.

Catalytic Distillation Technologies

Robert C Lemon

Kun Wang

James C Vartuli

Jihad Mohammed Dakka

Wilfried Jozef Mortier

Wenyih Frank Lai

John Scott Buchanan

Wieslaw J Roth

Kirk D Schmitt

Ramzi Yanni Saleh

Jean Willem Beeckman

Mitchell E Loescher

Christine Esther Kliewer

Robert Ellis Kay

Michael Charles Kerby

Michael J Keenan

Christopher C Boyer

Jason Wu

Gordon Kennedy

Jean W Beeckman

Ramzi Y Saleh

This invention relates to stabilized aggregates of small primary crystallites of zeolite Y that are clustered into larger secondary particles. At least 80% of the secondary particles may comprise at least 5 primary crystallites. The size of the primary crystallites may be at most about 0.5 micron, or at most about 0.3 micron, and the size of the secondary particles may be at least about 0.8 micron, or at least about 1.0 &#x3bc;m. The silica to alumina ratio of the resulting stabilized aggregated Y zeolite may be 4:1 or more.

Stabilized aggregates of small crystallites of zeolite Y

This invention relates to aggregates of small particles of synthetic faujasite zeolite. Small primary particles of zeolite are clustered into larger secondary particles. The observable average width of the primary particles may be 0.3 micron or less and the observable average width of the secondary particles may be 0.8 micron or more. The silica to alumina ratio of the zeolite may be less than 4:1.

Aggregates of small particles of synthetic faujasite zeolite

A mesoporous oxide composition includes, other than oxygen, a major amount of aluminum and lesser amounts of phosphorus and at least one rare earth element. The compositions have high surface area and excellent thermal and hydrothermal stability, with a relatively narrow pore size distribution in the mesoporous range. These compositions may be prepared by a hydrothermal co-precipitation method using an organic templating agent. These mesoporous oxide compositions may be used as catalysts or as supports for catalysts, for example, in a fluid catalytic cracking process.

Mesoporous aluminas stabilized with rare earth and phosphorous

A porous material comprises oxides of silicon and aluminum and is substantially free of X-ray diffraction peaks in its calcined form. The material is characterized by the following properties:

Amorphous acidic materials, their synthesis and use

In a process for producing hydroperoxides, an alkylaromatic compound of general formula (I): in which Rand Reach independently represents an alkyl group having from 1 to 4 carbon atoms, provided that Rand Rmay be joined to form a cyclic group having from 4 to 10 carbon atoms, said cyclic group being optionally substituted, and Rrepresents hydrogen, one or more alkyl groups having from 1 to 4 carbon atoms or a cyclohexyl group, with oxygen in the presence of a catalyst comprising a manganese oxide molecular sieve to produce a hydroperoxide of general formula (II): in which R, Rand Rhave the same meaning as in formula (I).The hydroperoxide of formula (II) may then be converted to a phenol and an aldehyde or a ketone of the general formula RCOCHR(III), in which Rand Rhave the same meaning as in formula (I). In the case where the ketone is cyclohexanone, this may then be dehydrogenated to produce further phenol.

Process for oxidizing alkylaromatic compounds

A catalyst for the oxidation of an alkane, alkene or mixtures thereof. The catalyst includes a mixed-metal oxide having the formula MoVNbTeSbOwherein, when a=1, b=0.01 to 1.0, c=0.01 to 1.0, d=0.01 to 1.0, e=0.01 to 1.0, and f is dependent upon the oxidation state of the other elements, the catalyst further characterized by having at least two crystal phases, the first crystal phase being an orthorhombic M1 phase and the second crystal phase being a pseudo-hexagonal M2 phase, the orthorhombic M1 phase present in an amount between greater than 60 weight percent to less than 90 weight percent. The catalysts disclosed herein exhibit a chemisorption of NHof less than about 0.2 mmole per gram of metal oxide.

Mixed metal oxide catalysts and processes for their preparation and use

A process for the oligomerization of propylene is disclosed wherein a tungstated zirconia catalyst prepared as a distillation structure is used in a reaction distillation zone under conditions of temperature and pressure to concurrently react the propylene to produce oligomers thereof and separate the oligomer products from unreacted propylene by fractional distillation in a distillation column reactor. Compared to the prior art tubular or plug flow reactors, lower temperatures and pressures are used to produce higher conversions and selectivities to preferred isomeric forms useful for preparing neo acids.

Propylene oligomerization process

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Easton, PA, United States of America

Robert C Lemon