Patents by Inventor Alkis S. Rappas
Alkis S. Rappas has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20150299588Abstract: Particulate compositions are described comprising an intimate mixture of a petroleum coke, coal and a gasification catalyst, where the gasification catalyst is loaded onto at least the coal for gasification in the presence of steam to yield a plurality of gases including methane and at least one or more of hydrogen, carbon monoxide, and other higher hydrocarbons are formed. Processes are also provided for the preparation of the particulate compositions and converting the particulate composition into a plurality of gaseous products.Type: ApplicationFiled: June 30, 2015Publication date: October 22, 2015Inventors: Robert A. Spitz, Alkis S. Rappas
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Patent number: 8734548Abstract: Processes are provided for preparing a substantially free-flowing alkali metal gasification catalyst-loaded coal particulate suitable for use as a feedstock for the production of gaseous products, and in particular methane, via the catalytic gasification of the catalyst-loaded coal particulate in the presence of steam.Type: GrantFiled: December 29, 2009Date of Patent: May 27, 2014Assignee: Greatpoint Energy, Inc.Inventors: Alkis S. Rappas, Robert A. Spitz, George Frederick Salem
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Patent number: 8734547Abstract: Processes are provided for preparing a substantially free-flowing alkali metal gasification catalyst-loaded carbonaceous particulate suitable for use as a feedstock for the production of gaseous products, and in particular methane, via the catalytic gasification of the catalyst-loaded carbonaceous particulate in the presence of steam.Type: GrantFiled: December 29, 2009Date of Patent: May 27, 2014Assignee: Greatpoint Energy, Inc.Inventors: Alkis S. Rappas, Robert A. Spitz
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Patent number: 8648121Abstract: The present invention relates to processes for hydromethanating a nickel-containing (and optionally vanadium-containing) carbonaceous feedstock while recovering at least a portion of the nickel content (and optionally vanadium content) originally present in the carbonaceous feedstock.Type: GrantFiled: February 22, 2012Date of Patent: February 11, 2014Assignee: Greatpoint Energy, Inc.Inventors: Alkis S. Rappas, Robert A. Spitz
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Patent number: 8557878Abstract: The present invention relates to processes and apparatuses for hydromethanating a vanadium-containing carbonaceous feedstock while recovering at least a portion of the vanadium content originally present in the carbonaceous feedstock.Type: GrantFiled: April 26, 2011Date of Patent: October 15, 2013Assignee: Greatpoint Energy, Inc.Inventors: Alkis S. Rappas, Robert A. Spitz
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Patent number: 8297542Abstract: Particulate compositions are described comprising an intimate mixture of a coal and a gasification catalyst in the presence of steam to yield a plurality of gases including methane and at least one or more of hydrogen, carbon monoxide, carbon dioxide, hydrogen sulfide, ammonia and other higher hydrocarbons are formed. Processes are also provided for the preparation of the particulate compositions and converting the particulate composition into a plurality of gaseous products.Type: GrantFiled: February 27, 2009Date of Patent: October 30, 2012Assignee: Greatpoint Energy, Inc.Inventors: Alkis S. Rappas, George Frederick Salem
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Publication number: 20120271072Abstract: The present invention relates to processes for hydromethanating a carbonaceous feedstock to a methane-enriched synthesis gas and a char by-product, with catalyst recovery from the by-product char to generate a spent char, and with treatment of the spent char to generate a carbon rich portion which is ultimately recycled to the hydromethanation reactor to increase overall carbon utilization and increase yields of product gas (per unit of feedstock).Type: ApplicationFiled: April 19, 2012Publication date: October 25, 2012Applicant: GREATPOINT ENERGY, INC.Inventors: Earl T. Robinson, Alkis S. Rappas
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Patent number: 8286901Abstract: Particulate compositions are described comprising an intimate mixture of a coal and a gasification catalyst. The particulate compositions are gasified in the presence of steam to yield a plurality of gases including methane and at least one or more of hydrogen, carbon monoxide, carbon dioxide, hydrogen sulfide, ammonia and other higher hydrocarbons. Processes are also provided for the preparation of the particulate compositions and converting the particulate composition into a plurality of gaseous products.Type: GrantFiled: February 27, 2009Date of Patent: October 16, 2012Assignee: Greatpoint Energy, Inc.Inventors: Alkis S. Rappas, George Frederick Salem
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Publication number: 20120213680Abstract: The present invention relates to processes for hydromethanating a nickel-containing (and optionally vanadium-containing) carbonaceous feedstock while recovering at least a portion of the nickel content (and optionally vanadium content) originally present in the carbonaceous feedstock.Type: ApplicationFiled: February 22, 2012Publication date: August 23, 2012Applicant: GREATPOINT ENERGY, INC.Inventors: Alkis S. Rappas, Robert A. Spitz
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Patent number: 8163048Abstract: The present invention relates to catalyst-loaded coal compositions having a moisture content of less than about 6 wt %, a process for the preparation of catalyst-loaded coal compositions, and an integrated process for the gasification of the catalyst-loaded coal compositions. The catalyst-loaded coal compositions can be prepared by a diffusive catalyst loading process that provides for a highly dispersed catalyst that is predominantly associated with the coal matrix, such as by ion-exchange.Type: GrantFiled: July 23, 2008Date of Patent: April 24, 2012Assignee: Greatpoint Energy, Inc.Inventors: Alkis S. Rappas, George Frederick Salem, Edwin J. Hippo
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Publication number: 20110262323Abstract: The present invention relates to processes and apparatuses for hydromethanating a vanadium-containing carbonaceous feedstock while recovering at least a portion of the vanadium content originally present in the carbonaceous feedstock.Type: ApplicationFiled: April 26, 2011Publication date: October 27, 2011Applicant: GREATPOINT ENERGY, INC.Inventors: Alkis S. Rappas, Robert A. Spitz
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Patent number: 7901644Abstract: Processes are described for the extraction and recovery of alkali metal from the char that results from catalytic gasification of a carbonaceous material. Among other steps, the processes of the invention include a hydrothermal leaching step in which a slurry of insoluble particulate comprising insoluble alkali metal compounds is treated with carbon dioxide and steam at elevated temperatures and pressures to effect the conversion of insoluble alkali metal compounds to soluble alkali metal compounds. Further, processes are described for the catalytic gasification of a carbonaceous material where a substantial portion of alkali metal is extracted and recovered from the char that results from the catalytic gasification process.Type: GrantFiled: December 23, 2008Date of Patent: March 8, 2011Assignee: GreatPoint Energy, Inc.Inventors: Alkis S. Rappas, Robert A. Spitz
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Patent number: 7897126Abstract: Processes are described for the extraction and recovery of alkali metal from the char that results from catalytic gasification of a carbonaceous material. Among other steps, the processes of the invention include a hydrothermal leaching step in which a slurry of insoluble particulate comprising insoluble alkali metal compounds is treated with carbon dioxide and steam at elevated temperatures and pressures to effect the conversion of insoluble alkali metal compounds to soluble alkali metal compounds. Further, processes are described for the catalytic gasification of a carbonaceous material where a substantial portion of alkali metal is extracted and recovered from the char that results from the catalytic gasification process.Type: GrantFiled: December 23, 2008Date of Patent: March 1, 2011Assignee: Greatpoint Energy, Inc.Inventors: Alkis S. Rappas, Robert A. Spitz
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Publication number: 20100168495Abstract: Processes are provided for preparing a substantially free-flowing alkali metal gasification catalyst-loaded carbonaceous particulate suitable for use as a feedstock for the production of gaseous products, and in particular methane, via the catalytic gasification of the catalyst-loaded carbonaceous particulate in the presence of steam.Type: ApplicationFiled: December 29, 2009Publication date: July 1, 2010Applicant: GREATPOINT ENERGY, INC.Inventors: Alkis S. Rappas, Robert A. Spitz
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Publication number: 20100168494Abstract: Processes are provided for preparing a substantially free-flowing alkali metal gasification catalyst-loaded coal particulate suitable for use as a feedstock for the production of gaseous products, and in particular methane, via the catalytic gasification of the catalyst-loaded coal particulate in the presence of steam.Type: ApplicationFiled: December 29, 2009Publication date: July 1, 2010Applicant: GREATPOINT ENERGY, INC.Inventors: Alkis S. Rappas, Robert A. Spitz, George Frederick Salem
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Publication number: 20090217590Abstract: Particulate compositions are described comprising an intimate mixture of a coal and a gasification catalyst in the presence of steam to yield a plurality of gases including methane and at least one or more of hydrogen, carbon monoxide, carbon dioxide, hydrogen sulfide, ammonia and other higher hydrocarbons are formed. Processes are also provided for the preparation of the particulate compositions and converting the particulate composition into a plurality of gaseous products.Type: ApplicationFiled: February 27, 2009Publication date: September 3, 2009Applicant: GREATPOINT ENERGY, INC.Inventors: Alkis S. Rappas, George Frederick Salem
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Publication number: 20090217586Abstract: Particulate compositions are described comprising an intimate mixture of a coal and a gasification catalyst. The particulate compositions are gasified in the presence of steam to yield a plurality of gases including methane and at least one or more of hydrogen, carbon monoxide, carbon dioxide, hydrogen sulfide, ammonia and other higher hydrocarbons. Processes are also provided for the preparation of the particulate compositions and converting the particulate composition into a plurality of gaseous products.Type: ApplicationFiled: February 27, 2009Publication date: September 3, 2009Applicant: GREATPOINT ENERGY, INC.Inventors: Alkis S. Rappas, George Frederick Salem
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Publication number: 20090169449Abstract: Processes are described for the extraction and recovery of alkali metal from the char that results from catalytic gasification of a carbonaceous material. Among other steps, the processes of the invention include a hydrothermal leaching step in which a slurry of insoluble particulate comprising insoluble alkali metal compounds is treated with carbon dioxide and steam at elevated temperatures and pressures to effect the conversion of insoluble alkali metal compounds to soluble alkali metal compounds. Further, processes are described for the catalytic gasification of a carbonaceous material where a substantial portion of alkali metal is extracted and recovered from the char that results from the catalytic gasification process.Type: ApplicationFiled: December 23, 2008Publication date: July 2, 2009Applicant: GreatPoint Energy, Inc.Inventors: Alkis S. Rappas, Robert A. Spitz
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Publication number: 20090166588Abstract: Particulate compositions are described comprising an intimate mixture of a petroleum coke, coal and a gasification catalyst, where the gasification catalyst is loaded onto at least the coal for gasification in the presence of steam to yield a plurality of gases including methane and at least one or more of hydrogen, carbon monoxide, and other higher hydrocarbons are formed. Processes are also provided for the preparation of the particulate compositions and converting the particulate composition into a plurality of gaseous products.Type: ApplicationFiled: December 23, 2008Publication date: July 2, 2009Applicant: GreatPoint Energy, Inc.Inventors: Robert A. Spitz, Alkis S. Rappas
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Publication number: 20090165383Abstract: Processes are described for the extraction and recovery of alkali metal from the char that results from catalytic gasification of a carbonaceous material. Among other steps, the processes of the invention include a hydrothermal leaching step in which a slurry of insoluble particulate comprising insoluble alkali metal compounds is treated with carbon dioxide and steam at elevated temperatures and pressures to effect the conversion of insoluble alkali metal compounds to soluble alkali metal compounds. Further, processes are described for the catalytic gasification of a carbonaceous material where a substantial portion of alkali metal is extracted and recovered from the char that results from the catalytic gasification process.Type: ApplicationFiled: December 23, 2008Publication date: July 2, 2009Applicant: GreatPoint Energy, Inc.Inventors: Alkis S. Rappas, Robert A. Spitz