Patents by Inventor Nicholas S. Rollman
Nicholas S. Rollman 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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Patent number: 11236027Abstract: Disclosed are processes for conversion of a feedstock comprising C8+ aromatic hydrocarbons to lighter aromatic products in which the feedstock and optionally hydrogen are contacted in the presence of the catalyst composition under conversion conditions effective to dealkylate and transalkylate said C8+ aromatic hydrocarbons to produce said lighter aromatic products comprising benzene, toluene and xylene. The catalyst composition comprises a zeolite, a first metal, and a second metal, and is treated with a source of sulfur and/or a source of steam.Type: GrantFiled: March 15, 2021Date of Patent: February 1, 2022Assignee: ExxonMobil Chemical Patents Inc.Inventors: Christine N. Elia, Wenyih F. Lai, Hari Nair, Joshua I. Cutler, Chuansheng Bai, Nicholas S. Rollman
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Publication number: 20210198165Abstract: Disclosed are processes for conversion of a feedstock comprising C8+ aromatic hydrocarbons to lighter aromatic products in which the feedstock and optionally hydrogen are contacted in the presence of the catalyst composition under conversion conditions effective to dealkylate and transalkylate said C8+ aromatic hydrocarbons to produce said lighter aromatic products comprising benzene, toluene and xylene. The catalyst composition comprises a zeolite, a first metal, and a second metal, and is treated with a source of sulfur and/or a source of steam.Type: ApplicationFiled: March 15, 2021Publication date: July 1, 2021Inventors: Christine N. Elia, Wenyih F. Lai, Hari Nair, Joshua I. Cutler, Chuansheng Bai, Nicholas S. Rollman
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Patent number: 10981845Abstract: Disclosed are processes for conversion of a feedstock comprising C8+ aromatic hydrocarbons to lighter aromatic products in which the feedstock and optionally hydrogen are contacted in the presence of the catalyst composition under conversion conditions effective to dealkylate and transalkylate said C8+ aromatic hydrocarbons to produce said lighter aromatic products comprising benzene, toluene and xylene. The catalyst composition comprises a zeolite, a first metal, and a second metal, and is treated with a source of sulfur and/or a source of steam.Type: GrantFiled: September 28, 2017Date of Patent: April 20, 2021Assignee: ExxonMobil Chemical Patents Inc.Inventors: Christine N. Elia, Wenyih F. Lai, Hari Nair, Joshua I. Cutler, Chuansheng Bai, Nicholas S. Rollman
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Patent number: 10745285Abstract: A process for converting a feedstock comprising an organic compound to a conversion product by contacting said feedstock at organic compound conversion conditions with a catalyst comprising a mordenite zeolite having a mesoporous surface area of greater than 30 m2/g and an average primary crystal size as measured by TEM of less than 80 nm.Type: GrantFiled: May 21, 2018Date of Patent: August 18, 2020Assignee: ExxonMobil Chemical Patents Inc.Inventors: Wenyih F. Lai, Nicholas S. Rollman, Guang Cao
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Publication number: 20200215521Abstract: A method for making catalyst materials is disclosed in which active metal ingredients of the final catalyst are added to a mixture for extruding the catalyst material that includes a binder, one or more precursors of one or more base metals and/or one or more noble metals, and a crystal of a zeolite. The extruded catalyst material is then pre-calcined and ion-exchanged and then a final calcining step is applied. The catalyst materials made by such a method are also disclosed as is a method for treating a hydrocarbon stream using the catalysts.Type: ApplicationFiled: August 30, 2018Publication date: July 9, 2020Inventors: Wenyih Frank Lai, Paul Podsiadlo, Chuansheng Bai, William W. Lonergan, Louis F. Burns, Stephen J. McCarthy, Nicholas S. Rollman
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Publication number: 20200031740Abstract: Disclosed are processes for conversion of a feedstock comprising C8+ aromatic hydrocarbons to lighter aromatic products in which the feedstock and optionally hydrogen are contacted in the presence of a first and a second catalyst composition under conversion conditions effective to produce said lighter aromatic products comprising benzene, toluene and xylene. In the process, the C8+ aromatic hydrocarbons are dealkylated to form C6-C7 aromatic hydrocarbon and the C2+ olefins formed are saturated. The remaining C8+ aromatic hydrocarbons are transalkylated with the C6-C7 aromatic hydrocarbon. The first and second catalyst compositions each comprise a zeolite, a first metal, and optionally a second metal, and are treated with a source of sulfur and/or a source of steam.Type: ApplicationFiled: September 28, 2017Publication date: January 30, 2020Inventors: Christine N. Elias, Wenyih F. Lai, Hari Nair, Joshua I. Cutler, Chuansheng Bai, Nicholas S. Rollman
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Publication number: 20200031737Abstract: Disclosed are processes for conversion of a feedstock comprising C8+ aromatic hydrocarbons to lighter aromatic products in which the feedstock and optionally hydrogen are contacted in the presence of the catalyst composition under conversion conditions effective to dealkylate and transalkylate said C8+ aromatic hydrocarbons to produce said lighter aromatic products comprising benzene, toluene and xylene. The catalyst composition comprises a zeolite, a first metal, and a second metal, and is treated with a source of sulfur and/or a source of steam.Type: ApplicationFiled: September 28, 2017Publication date: January 30, 2020Inventors: Christine N. Elias, Wenyih F. Lai, Hari Nair, Joshua I. Cutler, Chuansheng Bai, Nicholas S. Rollman
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Patent number: 10155665Abstract: Methods are provided for synthesis of various types of zeolites using synthesis mixtures that contain a dominant structure directing agent and one or more secondary structure directing agents. Advantageously, the secondary structure directing agents may substantially not alter the crystal structure and/or morphology of the crystals generated by a synthesis mixture in the presence of the dominant structure directing agent.Type: GrantFiled: October 20, 2015Date of Patent: December 18, 2018Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Wenyih Frank Lai, Nicholas S. Rollman, Jenna L. Walp, William W. Lonergan
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Publication number: 20180265369Abstract: The present invention provides a mordenite zeolite having a mesopore surface area of greater than 30 m2/g and an average primary crystal size as measured by TEM of less than 80 nm, and methods of making the mordenite zeolite.Type: ApplicationFiled: May 21, 2018Publication date: September 20, 2018Inventors: Wenyih F. Lai, Nicholas S. Rollman, Guang Cao
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Patent number: 10053403Abstract: Disclosed are catalyst compositions and their use in a process for the conversion of a feedstock containing C8+ aromatic hydrocarbons to produce light aromatic products, comprising benzene, toluene and xylene. The catalyst composition comprises a zeolite which comprises a MOR framework structure and a MFI and/or MEL framework structure, (b) at least one first metal of Group 10 of the IUPAC Periodic Table, and (c) optionally at least one second metal of Group 11 to 15 of the IUPAC Periodic Table. In one or more embodiments, the MOR framework structure comprises mordenite, preferably a mordenite zeolite having small particle size. The MFI framework structure preferably comprises ZSM-5, and the MEL framework structure preferably comprises ZSM-11.Type: GrantFiled: October 20, 2017Date of Patent: August 21, 2018Assignee: ExxonMobil Chemical Patents Inc.Inventors: Wenyih Frank Lai, Christine N. Elia, Nicholas S. Rollman, Joshua I. Cutler
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Patent number: 10017394Abstract: The present invention provides a mordenite zeolite having a mesopore surface area of greater than 30 m2/g and an average primary crystal size as measured by TEM of less than 80 nm, and methods of making the mordenite zeolite.Type: GrantFiled: January 21, 2016Date of Patent: July 10, 2018Assignee: ExxonMobil Chemical Patents Inc.Inventors: Wenyih F. Lai, Nicholas S. Rollman, Guang Cao
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Publication number: 20180134637Abstract: Disclosed are catalyst compositions and their use in a process for the conversion of a feedstock containing C8+ aromatic hydrocarbons to produce light aromatic products, comprising benzene, toluene and xylene. The catalyst composition comprises a zeolite which comprises a MOR framework structure and a MFI and/or MEL framework structure, (b) at least one first metal of Group 10 of the IUPAC Periodic Table, and (c) optionally at least one second metal of Group 11 to 15 of the IUPAC Periodic Table. In one or more embodiments, the MOR framework structure comprises mordenite, preferably a mordenite zeolite having small particle size. The MFI framework structure preferably comprises ZSM-5, and the MEL framework structure preferably comprises ZSM-11.Type: ApplicationFiled: October 20, 2017Publication date: May 17, 2018Inventors: Wenyih Frank Lai, Christine N. Elia, Nicholas S. Rollman, Joshua I. Cutler
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Patent number: 9724680Abstract: The invention relates to a method of making a reinforced catalytic microporous and/or mesoporous bound composition comprising the steps of: providing a pre-formed catalytic crystalline material; mixing the catalytic crystalline material with water, a metal oxide binder, and a reinforcing glass fiber to form an extrudable composition; extruding the extrudable slurry under conditions sufficient to form the reinforced catalytic bound extrudate; and calcining the reinforced catalytic bound extrudate at a temperature and for a time sufficient to form a calcined reinforced catalytic bound catalyst. Advantageously, the reinforcing glass fiber can have a diameter from 5-100 microns and a length-to-diameter ratio from 300:1-3000:1 and can be present in an amount from about 1-50 parts, based on about 1000 parts combined of catalytic crystalline material and metal oxide binder.Type: GrantFiled: November 8, 2013Date of Patent: August 8, 2017Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Wenyih Frank Lai, Nicholas S. Rollman
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Publication number: 20160221832Abstract: The present invention provides a mordenite zeolite having a mesopore surface area of greater than 30 m2/g and an average primary crystal size as measured by TEM of less than 80 nm, and methods of making the mordenite zeolite.Type: ApplicationFiled: January 21, 2016Publication date: August 4, 2016Inventors: Wenyih F. Lai, Nicholas S. Rollman, Guang Cao
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Publication number: 20160122193Abstract: Methods are provided for synthesis of various types of zeolites using synthesis mixtures that contain a dominant structure directing agent and one or more secondary structure directing agents. Advantageously, the secondary structure directing agents may substantially not alter the crystal structure and/or morphology of the crystals generated by a synthesis mixture in the presence of the dominant structure directing agent.Type: ApplicationFiled: October 20, 2015Publication date: May 5, 2016Applicant: ExxonMobil Research and Engineering CompanyInventors: Wenyih Frank Lai, Nicholas S. Rollman, Jenna L. Walp, William W. Lonergan
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Patent number: 9289755Abstract: Methods are provided for synthesizing crystals having a ZSM-5 framework structure from synthesis mixtures suitable for synthesis of ZSM-12 framework structure crystals in the absence of seed crystals with a ZSM-5 framework structure, such as in the absence of any seed crystals. For synthesis mixtures with a sufficiently high XO2:Y2O3 ratio, seeding a synthesis mixture with ZSM-5 seed crystals can result in production of pure phase ZSM-5 crystals with a new morphology. The morphology can include rod-like primary crystallites with a length of about 0.5 ?m or less that are organized/aggregated into larger secondary crystal structures. The aggregation of the primary crystallites into a secondary crystal structure can allow for an unexpectedly large mesoporous surface area for the ZSM-5 crystals.Type: GrantFiled: October 25, 2013Date of Patent: March 22, 2016Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Wenyih Frank Lai, Nicholas S. Rollman
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Publication number: 20140162866Abstract: The invention relates to a method of making a reinforced catalytic microporous and/or mesoporous bound composition comprising the steps of: providing a pre-formed catalytic crystalline material; mixing the catalytic crystalline material with water, a metal oxide binder, and a reinforcing glass fiber to form an extrudable composition; extruding the extrudable slurry under conditions sufficient to form the reinforced catalytic bound extrudate; and calcining the reinforced catalytic bound extrudate at a temperature and for a time sufficient to form a calcined reinforced catalytic bound catalyst. Advantageously, the reinforcing glass fiber can have a diameter from 5-100 microns and a length-to-diameter ratio from 300:1-3000:1 and can be present in an amount from about 1-50 parts, based on about 1000 parts combined of catalytic crystalline material and metal oxide binder.Type: ApplicationFiled: November 8, 2013Publication date: June 12, 2014Applicant: ExxonMobil Research and Engineering CompanyInventors: Wenyih Frank Lai, Nicholas S. Rollman
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Publication number: 20140162867Abstract: Methods are provided for synthesizing crystals having a ZSM-5 framework structure from synthesis mixtures suitable for synthesis of ZSM-12 framework structure crystals in the absence of seed crystals with a ZSM-5 framework structure, such as in the absence of any seed crystals. For synthesis mixtures with a sufficiently high XO2:Y2O3 ratio, seeding a synthesis mixture with ZSM-5 seed crystals can result in production of pure phase ZSM-5 crystals with a new morphology. The morphology can include rod-like primary crystallites with a length of about 0.5 ?m or less that are organized/aggregated into larger secondary crystal structures. The aggregation of the primary crystallites into a secondary crystal structure can allow for an unexpectedly large mesoporous surface area for the ZSM-5 crystals.Type: ApplicationFiled: October 25, 2013Publication date: June 12, 2014Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Wenyih Frank Lai, Nicholas S. Rollman