Corning Incorporated

Tinghong Tao

Kishor Purushottam Gadkaree

Gregory A Merkel

Jianguo Wang

Willard A Cutler

Isabelle Marie Melscoet-Chauvel

Douglas Munroe Beall

Steven Bolaji Ogunwumi

David L Hickman

David John Thompson

Y Lisa Peng

Jennifer M Torns

Steven Bruce Dawes

Raja Rao Wusirika

Wei Liu

Ronald Leroy Stewart

Weiguo Miao

James Edward Dickinson, Jr

Margaret Kathleen Faber

Odessa Natalie Petzold

Charles Mitchel Sorensen, Jr

G Scott Glaesemann

Donald J Wissuchek, Jr

James Alan Snipes

Brian Paul Usiak

Yuxin Tang

Bin Wen

Isabelle M Melscoet-Chauvel

Odessa N Petzold

Substantially non-microcracked, porous, cordierite ceramic honeycomb bodies are provided. Although exhibiting moderately high thermal expansion (CTE) between 7&#xd7;10to 16&#xd7;10/&#xb0; C. (25-800&#xb0; C.), the honeycomb bodies exhibit relatively high thermal shock parameter (TSP), such as TSR&#x2267;525&#xb0; C. by virtue of a high MOR/E ratio, and/or low E=E/E. and well interconnected porosity, as witnessed by a relatively high pore connectivity factor (PCF). A method of manufacturing the honeycomb ceramic structure is also provided.

Low-microcracked, porous ceramic honeycombs and methods of manufacturing same

Cordierite ceramic articles with high volume percent porosities of at least 64% but less than 80% have controlled median pore sizes and mean coefficients of thermal expansion that impart substantially improved modulus of rupture strengths (MOR) and thermal shock resistance (TSR) to the ceramic articles.

High porosity filters for 4-way exhaust gas treatment

Porous ceramic catalyst supports or filters to be provided with catalyst coatings via oxide washcoating processes are pre-coated with cross-linked polymer barrier layers to prevent washcoat nanoparticle intrusion into the microcracked and/or microporous surfaces of the ceramics, the barrier coatings being formed by thermally cross-linking hydrocarbon polymers that are vaporizable at moderate washcoat stabilization or catalyst activation temperatures and that preferentially block the micropore/microchannel pore volume of the article.

Porous ceramic filters with catalyst coatings

Substantially non-microcracked, porous, cordierite ceramic honeycomb bodies are provided. Although exhibiting moderately high thermal expansion (CTE) between 7&#xd7;10to 16&#xd7;10/&#xb0; C. (25-800&#xb0; C.), the honeycomb bodies exhibit relatively high thermal shock parameter (TSP), such as TSR&#x2267;525&#xb0; C. by virtue of a high MOR/E ratio, and/or low E=E/Eand well interconnected porosity, as witnessed by a relatively high pore connectivity factor (PCF). A method of manufacturing the honeycomb ceramic structure is also provided.

Porous, non-microcracked cordierite ceramic bodies having high strength, high strain tolerance, and high thermal shock resistance are produced from cordierite powder batch mixtures of controlled powder particle size fired according to a schedule that prevents objectionable cordierite grain growth, maintaining a small cordierite crystalline domain size in order to minimize or prevent microcracking in the product.

High strength substantially non-microcracked cordierite honeycomb body and manufacturing method

Ceramic structures such as catalyst supports or combustion exhaust filters that incorporate combinations of high temperature phase change materials, and methods for determining the thermal history of such ceramic structures, by disposing the phase change materials on or within the structures and subsequently detecting the presence or absence of phase changes in the materials after exposure to high temperatures.

In-situ temperature detection in high temperature ceramic structures

A diesel particulate filter comprising a plugged, wall-flow honeycomb filter body composed of cordierite and having a plurality of parallel end-plugged cell channels traversing the body from a frontal inlet end to an outlet end thereof, wherein the filter exhibits a CTE (25-800&#xb0; C.) of less than 13&#xd7;10/&#xb0; C., a bulk filter density of less than 0.60 g/cm, a median pore diameter, d, of less than 25 micrometers, a porosity and pore size distribution that satisfy the relationship P&#x2266;3.75, wherein Pis equal to 10.2474{1/[(d)(%porosity/100)]}+0.0366183(d)&#x2212;0.00040119(d)+0.468815(100/%porosity)+0.0297715(d)+1.61639(d&#x2212;d)/d, wherein d, and dare pore diameters at 10% and 90% of the pore size distribution on a volumetric basis, and d&#x3c;d&#x3c;d. A method of making the same is also provided.

Method of manufacturing a cordierite structure

A diesel particulate filter having a honeycomb body composed of cordierite and exhibiting a CTE (25-800&#xb0; C.) of less than 13&#xd7;10/&#xb0; C.; a median pore diameter, d, of less than 25 &#x3bc;m; % porosity not less than 53%; and a narrow pore size distribution wherein a value of dd)/dis not greater than 0.6; and a value of dless than 40 &#x3bc;m wherein d, and dare pore diameters at 10% and 90% of the pore size distribution on a volumetric basis, and d&#x3c;d&#x3c;d. The particulate filter preferably exhibits a plugged, wall-flow honeycomb filter body composed of cordierite and having a plurality of parallel end-plugged cell channels traversing the body from a frontal inlet end to an outlet end thereof.

Narrow pore size distribution cordierite filters with reduced pressure drop

A diesel particulate filter comprising a plugged, wall-flow honeycomb filter body composed of cordierite and having a plurality of parallel end-plugged cell channels traversing the body from a frontal inlet end to an outlet end thereof, wherein the filter exhibits a CTE (25&#x2013;800&#xb0; C.) of less than 13&#xd7;10/&#xb0; C., a bulk filter density of less than 0.60 g/cm, a median pore diameter, d, of less than 25 micrometers, a porosity and pore size distribution that satisfy the relationship P&#x2266;3.75, wherein Pis equal to 10.2474{1/[(d)(% porosity/100)]}+0.0366183(d)&#x2212;0.00040119(d)+0.468815(100/% porosity)+0.0297715(d)+1.61639(d&#x2212;d)/d, wherein d, and dare pore diameters at 10% and 90% of the pore size distribution on a volumetric basis, and d&#x3c;d&#x3c;d. A method of making the same is also provided.

Cordierite filters with reduced pressure drop

Porous ceramic catalyst supports or filters to be provided with catalyst coatings via oxide washcoating processes are pre-coated with polymer barrier layers to prevent washcoat nanoparticle intrusion into the microcracked and/or microporous surfaces of the ceramics, the barrier coatings being formed of hydrocarbon polymers that are soluble or dispersible in polar media, capable of forming neutral or hydrophilic surfaces on porous ceramic supports, and completely vaporizable at moderate washcoat stabilization or catalyst activation temperatures.

Porous ceramic catalyst supports or filters to be provided with catalyst coatings via oxide washcoating processes are pre-coated with cross-linked polymer barrier layers to prevent washcoat nanoparticle intrusion into the microcracked and/or microporous surfaces of the ceramics, the barrier coatings being formed by thermally cross-linking hydrocarbon polymers that are vaporizable at moderate washcoat stabilization or catalyst activation temperatures and being preferentially.

The invention provides a monolithic catalyst support for hydrogenation and hydrotreating and in particular for selective hydrogenation of pyrolysis gasoline. The monolithic catalyst includes (i) a multicellular monolith body, preferably having a honeycomb structure, most preferably a honeycomb structure made of cordierite, the honeycomb structure having an inlet end, an outlet end, and a multiplicity of mutually adjoining cells extending along the length of the body from the inlet end to the outlet end, the cells being separated from one another by porous walls, and, (ii) a coating consisting of theta alumina synthesized in situ on the multicellular monolith body. The in situ theta alumina is strongly bonded with the multicellular monolith body and comprises at least 50% by weight of the washcoat layer, and preferably greater than 90% by weight.

In situ theta alumina coated monolithic catalyst supports

A method of increasing the selective desulfurization of naphtha feed streams that includes: combining a naphtha feed stream with a hydrogen containing gas to form a combined feed stream and reacting the combined feed stream over a monolithic honeycomb catalyst bed containing hydrodesulfurization catalyst components to give a desulfurized naphtha. In conducting such an illustrative embodiment, the percent desulfurization of the naphtha is preferably greater than about 50% and the percent olefin hydrogenation of the naphtha is preferably less than about 50%. The monolithic honeycomb catalyst bed of one alternative and illustrative embodiment preferably has a channel density of about 25 to 1600 cells per square inch; a channel size from about 0.1 to 10 mm; and a channel wall thickness of about 0.01 to about 2.0 mm. The illustrative method should be carried out such that the octane number (R&plus;M/2) of the naphtha feed stream is reduced by no more than 3.0 at 95% desulfurization and preferably no more than 1.5. The hydrodesulfurization catalyst components include a powdered refractory oxide and transition metal catalyst compounds. Alternatively the hydrodesulfurization catalyst components may be impregnated into the monolithic honeycomb catalyst bed itself. Preferable hydrodesulfurization catalyst components include a Group VIII metal containing compound and a Group VIB metal containing compound. Alternatively the hydrodesulfurization catalyst components may further include a phosphorous promoter.

High performance monolith treater for gasoline upgrade

Carbon monolith-supported catalysts with high leach resistance used in catalytic applications involving strong acidic and basic conditions in a pH range of from 0 to 6.5 and from 7.5 to 14, are respectively described. The leach resistance of the catalyst system originates from strong interaction between the catalyst and the unsaturated valence of the carbon surface. In addition to surprisingly high resistance to leach out, the catalysts also have substantial differential advantages in catalyst performance: catalyst activity, selectivity, and stability.

Metallic catalysts for non-neutral liquid media

In connection with drawing a fiber in a drawing portion of a drawing device having a refractory, oxide component, a method and apparatus provide an environment in the drawing portion that causes active oxidation of a refractory contaminant on a blank. The active oxidation of the refractory contaminant causes it to corrode away during drawing.

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Big Flats, NY, United States of America

Tinghong Tao