Patents by Inventor Mark D. Ibsen
Mark D. Ibsen 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: 20130109765Abstract: A method of producing synthesis gas by introducing a feed material to be gasified into a gasification apparatus comprising at least one fluidized component operable as a fluidized bed, wherein the gasification apparatus is configured to convert at least a portion of the feed material into a gasifier product gas comprising synthesis gas; and maintaining fluidization of the at least one fluidized component by introducing a fluidization gas thereto, wherein the fluidization gas comprises at least one component other than steam. A system for producing synthesis gas is also provided.Type: ApplicationFiled: October 15, 2012Publication date: May 2, 2013Applicant: Rentech, Inc.Inventors: Weibin JIANG, Bruce E. McComish, Bryan C. Borum, Benjamin H. Carryer, Mark D. Ibsen, Mark K. Robertson, Eric R. Elrod, Sim Weeks, Harold A. Wright
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Publication number: 20130105008Abstract: An apparatus including at least one seal pot having at least one penetration through a surface other than the top of the seal pot, each of the at least one penetrations being configured for introduction, into the at least one seal pot, of solids from a separator upstream of the at least one seal pot; a substantially non-circular cross section; or both at least one penetration through a surface other than the top of the seal pot and a substantially non-circular cross section.Type: ApplicationFiled: October 15, 2012Publication date: May 2, 2013Applicant: Rentech, Inc.Inventors: Weibin JIANG, Bruce E. McComish, Bryan C. Borum, Benjamin H. Carryer, Mark D. Ibsen, Mark K. Robertson, Eric R. Elrod, Sim Weeks, Harold A. Wright
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Patent number: 8431081Abstract: Solvent extraction is used to remove wax and contaminants from an iron-based Fischer-Tropsch catalyst in a natural circulation continuous-flow system. The wax-free catalyst is then subjected to controlled oxidation to convert the iron to its initial oxidized state, Fe2O3. Reactivation of the oxide catalyst precursor is carried out by addition of synthesis gas.Type: GrantFiled: May 10, 2011Date of Patent: April 30, 2013Assignee: Rentech, Inc.Inventors: Belma Demirel, Mark S. Bohn, Charles B. Benham, James E. Siebarth, Mark D. Ibsen
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Publication number: 20130028802Abstract: A system configured for the production of at least one product selected from the group consisting of syngas, Fischer-Tropsch synthesis products, power, and chemicals, the system comprising a dual fluidized bed gasification apparatus and at least one apparatus selected from power production apparatus configured to produce power from the gasification product gas, partial oxidation reactors configured for oxidation of at least a portion of the product gas, tar removal apparatus configured to reduce the amount of tar in the product gas, Fischer-Tropsch synthesis apparatus configured to produce Fischer-Tropsch synthesis products from at least a portion of the product gas, chemical production apparatus configured for the production of at least one non-Fischer-Tropsch product from at least a portion of the product gas, and dual fluidized bed gasification units configured to alter the composition of the product gas. Methods of operating the system are also provided.Type: ApplicationFiled: July 23, 2012Publication date: January 31, 2013Applicant: RENTECH, INC.Inventors: Weibin Jiang, Bruce E. McComish, Bryan C. Borum, Benjamin H. Carryer, Mark D. Ibsen, Mark Robertson, Eric Elrod, Sim Weeks, Harold A. Wright
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Publication number: 20130030062Abstract: A system configured for the production of at least one product selected from the group consisting of syngas, Fischer-Tropsch synthesis products, power, and chemicals, the system comprising a dual fluidized bed gasification apparatus and at least one apparatus selected from power production apparatus configured to produce power from the gasification product gas, partial oxidation reactors configured for oxidation of at least a portion of the product gas, tar removal apparatus configured to reduce the amount of tar in the product gas, Fischer-Tropsch synthesis apparatus configured to produce Fischer-Tropsch synthesis products from at least a portion of the product gas, chemical production apparatus configured for the production of at least one non-Fischer-Tropsch product from at least a portion of the product gas, and dual fluidized bed gasification units configured to alter the composition of the product gas. Methods of operating the system are also provided.Type: ApplicationFiled: July 23, 2012Publication date: January 31, 2013Applicant: RENTECH, INC.Inventors: Weibin Jiang, Bruce E. McComish, Bryan C. Borum, Benjamin H. Carryer, Mark D. Ibsen, Mark Robertson, Eric Elrod, Sim Weeks, Harold A. Wright
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Publication number: 20130030064Abstract: A system configured for the production of at least one product selected from the group consisting of syngas, Fischer-Tropsch synthesis products, power, and chemicals, the system comprising a dual fluidized bed gasification apparatus and at least one apparatus selected from power production apparatus configured to produce power from the gasification product gas, partial oxidation reactors configured for oxidation of at least a portion of the product gas, tar removal apparatus configured to reduce the amount of tar in the product gas, Fischer-Tropsch synthesis apparatus configured to produce Fischer-Tropsch synthesis products from at least a portion of the product gas, chemical production apparatus configured for the production of at least one non-Fischer-Tropsch product from at least a portion of the product gas, and dual fluidized bed gasification units configured to alter the composition of the product gas. Methods of operating the system are also provided.Type: ApplicationFiled: July 23, 2012Publication date: January 31, 2013Applicant: RENTECH, INC.Inventors: Weibin Jiang, Bruce E. McComish, Bryan C. Borum, Benjamin H. Carryer, Mark D. Ibsen, Mark Robertson, Eric Elrod, Sim Weeks, Harold A. Wright
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Publication number: 20130025281Abstract: A system configured for the production of at least one product selected from the group consisting of syngas, Fischer-Tropsch synthesis products, power, and chemicals, the system comprising a dual fluidized bed gasification apparatus and at least one apparatus selected from power production apparatus configured to produce power from the gasification product gas, partial oxidation reactors configured for oxidation of at least a portion of the product gas, tar removal apparatus configured to reduce the amount of tar in the product gas, Fischer-Tropsch synthesis apparatus configured to produce Fischer-Tropsch synthesis products from at least a portion of the product gas, chemical production apparatus configured for the production of at least one non-Fischer-Tropsch product from at least a portion of the product gas, and dual fluidized bed gasification units configured to alter the composition of the product gas. Methods of operating the system are also provided.Type: ApplicationFiled: July 23, 2012Publication date: January 31, 2013Applicant: RENTECH, INC.Inventors: Weibin Jiang, Bruce E. McComish, Bryan C. Borum, Benjamin H. Carryer, Mark D. Ibsen, Mark Robertson, Eric Elrod, Sim Weeks, Harold A. Wright
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Publication number: 20130028801Abstract: A system configured for the production of at least one product selected from the group consisting of syngas, Fischer-Tropsch synthesis products, power, and chemicals, the system comprising a dual fluidized bed gasification apparatus and at least one apparatus selected from power production apparatus configured to produce power from the gasification product gas, partial oxidation reactors configured for oxidation of at least a portion of the product gas, tar removal apparatus configured to reduce the amount of tar in the product gas, Fischer-Tropsch synthesis apparatus configured to produce Fischer-Tropsch synthesis products from at least a portion of the product gas, chemical production apparatus configured for the production of at least one non-Fischer-Tropsch product from at least a portion of the product gas, and dual fluidized bed gasification units configured to alter the composition of the product gas. Methods of operating the system are also provided.Type: ApplicationFiled: July 23, 2012Publication date: January 31, 2013Applicant: RENTECH, INC.Inventors: Weibin Jiang, Bruce E. McComish, Bryan C. Borum, Benjamin H. Carryer, Mark D. Ibsen, Mark Robertson, Eric Elrod, Sim Weeks, Harold A. Wright
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Publication number: 20110211996Abstract: Solvent extraction is used to remove wax and contaminants from an iron-based Fischer-Tropsch catalyst in a natural circulation continuous-flow system. The wax-free catalyst is then subjected to controlled oxidation to convert the iron to its initial oxidized state, Fe2O3. Reactivation of the oxide catalyst precursor is carried out by addition of synthesis gas.Type: ApplicationFiled: May 10, 2011Publication date: September 1, 2011Inventors: Belma Demirel, Mark S. Bohn, Charles B. Benham, James E. Siebarth, Mark D. Ibsen
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Patent number: 7964156Abstract: Solvent extraction is used to remove wax and contaminants from an iron-based Fischer-Tropsch catalyst in a natural circulation continuous-flow system. The wax-free catalyst is then subjected to controlled oxidation to convert the iron to its initial oxidized state, Fe203. Reactivation of the oxide catalyst precursor is carried out by addition of synthesis gas.Type: GrantFiled: October 18, 2007Date of Patent: June 21, 2011Assignee: Rentech, Inc.Inventors: Belma Demirel, Mark S. Bohn, Charles B. Benham, James E. Siebarth, Mark D. Ibsen
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Publication number: 20100256246Abstract: A thermal conversion process comprising: pyrolizing or gasifying a carbonaceous feedstock to produce a first synthesis gas having a first H2:CO ratio of less than a minimum value or greater than a maximum value; providing enriched oxygen; and subjecting the first synthesis gas to partial oxidation in the presence of at least a portion of the enriched oxygen to produce a conditioned synthesis gas having a desired ratio of H2:CO in the range of from the minimum value to the maximum value. A method of producing FT product liquids by providing a conditioned synthesis gas according to the process and producing FT product liquids by subjecting the conditioned synthesis gas to FT reaction under FT operating conditions. A system for carrying out the methods is also provided.Type: ApplicationFiled: April 6, 2010Publication date: October 7, 2010Applicant: RENTECH, INC.Inventors: Benjamin H. CARRYER, Eric R. ELROD, Mark D. IBSEN, Brian K. JOHNSON, Harold A. WRIGHT
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Patent number: 7303731Abstract: Solvent extraction is used to remove wax and contaminants from an iron-based Fischer-Tropsch catalyst in a natural circulation continuous-flow system. The wax-free catalyst is then subjected to controlled oxidation to convert the iron to its initial oxidized state, Fe2O3. Reactivation of the oxide catalyst precursor is carried out by addition of synthesis gas.Type: GrantFiled: December 7, 2004Date of Patent: December 4, 2007Assignee: Rentech, Inc.Inventors: Belma Demirel, Mark S. Bohn, Charles B. Benham, James E. Siebarth, Mark D. Ibsen
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Patent number: 7108835Abstract: An arrangement of cooling tubes within a Fischer-Tropsch slurry reactor simplifies removal and reinstallation of cooling tubes for reactor maintenance.Type: GrantFiled: October 8, 2003Date of Patent: September 19, 2006Assignee: Rentech, Inc.Inventors: William H. Hawthorne, Mark D. Ibsen, Peter S. Pedersen, Mark S. Bohn
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Patent number: 6838487Abstract: Solvent extraction is used to remove wax and contaminants from an iron-based Fischer-Tropsch catalyst in a natural circulation continuous-flow system. The wax-free catalyst is then subjected to controlled oxidation to convert the iron to its initial oxidized state, Fe2O3. Reactivation of the oxide catalyst precursor is carried out by addition of synthesis gas.Type: GrantFiled: December 4, 2003Date of Patent: January 4, 2005Assignee: Rentech, Inc.Inventors: Belma Demirel, Mark S. Bohn, Charles B. Benham, James E. Siebarth, Mark D. Ibsen