US 7,078,364 B2Granted

Ship-in-a-bottle catalysts

AssigneeUniversity of Southern California

InventorsJames F. Haw, Weiguo Song

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Abstract

In accordance with the present invention there is provided a novel catalyst system in which the catalytic structure is tailormade at the nanometer scale using the invention's novel ship-in-a-bottle synthesis techniques. The invention describes modified forms of solid catalysts for use in heterogeneous catalysis that have a microporous structure defined by nanocages. Examples include zeolites, SAPOs, and analogous materials that have the controlled pore dimensions and hydrothermal stability required for many industrial processes. The invention provides for modification of these catalysts using reagents that are small enough to pass through the windows used to access the cages. The small reagents are then reacted to form larger molecules in the cages.

Claims12

Dependent claims

A solid catalyst comprising:

a microporous framework comprising a silicoaluminophosphate molecular sieve having an average pore size of from about 3.5 to 5 angstroms and defined by nanocages, each such nanocage being accessible through a window that is smaller than the size of the nanocage;
and
an inorganic compound in at least one of the nanocages,
wherein said inorganic compound is a product formed within said nanocages by a reaction of an inorganic molecule that has a kinetic diameter smaller than the kinetic diameter of the inorganic compound;
and wherein the kinetic diameter of the inorganic molecule is less than the largest linear dimension of windows for accessing said nanocages but the kinetic diameter of the inorganic compound is greater than the largest linear dimension of said windows;
said catalyst being effective to promote catalytic conversion of from about 50% to 98% of oxygenates in a feedstock to olefins.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/127,346Filed 22 Apr 2002 · us provisional application
Priority: 20 Apr 2001
Published: US 2002/0183577 A15 Dec 2002
Granted: 18 Jul 2006
Term ends: Not estimatedThe source records don’t support an estimate.

Classification17 codes

C10G 3/49
Further characterised by the catalyst support: containing crystalline aluminosilicates, e.g. molecular sieves
B01J 29/84
Phosphates: aluminophosphates containing other elements, e.g. metals, boron
B01J 29/85
Aluminophosphates containing other elements, e.g. metals, boron: silicoaluminophosphates [SAPO compounds]
B01J 31/0268
Phosphines or phosphonium compounds, i.e. phosphorus bonded to at least one carbon atom, including e.g. sp2-hybridised phosphorus compounds such…:…

Family

Application60/285,463Us provisional application · filed 20 Apr 2001
Application60/311,324Us provisional application · filed 10 Aug 2001
US 2002/0183577 A1Pre-grant publication · published 5 Dec 2002
US 7,078,364 B2This patent

From the US filing history. Foreign family members aren’t listed.

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