Patents by Inventor Mark H. Li
Mark H. Li 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: 20240287225Abstract: In at least one embodiment, a process to produce a poly alpha-olefin (PAO) includes introducing a first alpha-olefin to a first catalyst system comprising activator and a metallocene compound into a continuous stirred tank reactor or a continuous tubular reactor under first reactor conditions to form a first reactor effluent. The first alpha-olefin is introduced to the reactor at a flow rate of about 100 g/hr or more. The first reactor effluent includes at least 60 wt % of PAO dimer and 40 wt % or less of higher oligomers, where the higher oligomers are oligomers that have a degree of polymerization of 3 or more. The process includes introducing the first reactor effluent and a second alpha-olefin to a second catalyst composition including an acid catalyst in a second reactor to form a second reactor effluent comprising PAO trimer.Type: ApplicationFiled: April 26, 2024Publication date: August 29, 2024Inventors: Patrick C. Chen, Mark H. Li, Jennifer L. Rapp, Pramod J. Nandapurkar, Brian H. Wahn, Babak Lotfizadehdehkordi, Craig J. Emett, Najeeb M. Kuzhiyil, Jian Yang
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Publication number: 20230383022Abstract: Processes for making saturated isomerized polyalphaolefm by concurrently isomerizing and hydrogenating unsaturated polyalphaolefm in the presence of a high activity catalyst. Such processes can include contacting at least one unsaturated polyalphaolefm with a catalyst capable of both isomerizing and hydrogenating the polyalphaolefm, wherein the catalyst includes a zeolite or mesoporous material, the zeolite having a silica to alumina mole ratio of from about 5 to about 100 and an alpha value of from about 10 to about 1,000, and the mesoporous material having a collidine uptake of from about 100 ??moles/g to about 500 ?moles/g, wherein a Group VIB to VIIIB metal is incorporated in the catalyst at a concentration of from about 0.01 wt % to about 60.00 wt %, and wherein the zeolite is selected from the group consisting of ZSM-48, ZSM-23, ZSM-12, ZSM-35, ZSM-11, ZSM-57, Beta zeolite, Mordenite zeolite, USY zeolite, zeolite having a MWW framework, and combinations thereof.Type: ApplicationFiled: November 8, 2021Publication date: November 30, 2023Inventors: Mark H. Li, Renyuan Yu, Patrick C. Chen, Anatoly I. Kramer, Wenyih F. Lai
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Publication number: 20230167207Abstract: The present disclosure relates to processes to produce a poly alpha-olefin (PAO) composition. In some embodiments, a process includes introducing a first C6-C32 alpha-olefin, a second C6-C32 alpha-olefin different than the first C6-C32 alpha-olefin, and a first catalyst system comprising an activator and a metallocene compound into a first reactor, wherein a molar ratio of the first C6-C32 alpha-olefin to the second C6-C32 alpha-olefin is from about 1:5 to about 5:1, by total moles of the first and second C6-C32 alpha-olefin; obtaining a first effluent including a PAO dimer; introducing the first effluent, a third C6-C32 alpha-olefin, and a second catalyst system to an oligomerization unit, wherein the third C6-C32 alpha-olefin is the same or different than the first C6-C32 alpha-olefin and/or second C6-C32 alpha-olefin; obtaining a second effluent; and hydrogenating the second effluent to form the PAO composition.Type: ApplicationFiled: April 28, 2021Publication date: June 1, 2023Inventors: Mark H. Li, Patrick C. Chen
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Patent number: 11661465Abstract: The present disclosure generally relates to process to produce a poly alpha-olefin (PAO), comprising: a) introducing a first alpha-olefin to a first catalyst system comprising non-aromatic hydrocarbon soluble activator and a metallocene compound into a continuous stirred tank reactor or a continuous tubular reactor under first reactor conditions, wherein the first alpha-olefin is preferably introduced to the reactor at a flow rate of about 100 g/hr or more, to form a first reactor effluent comprising PAO (such as at least 60 wt % of PAO dimer and 40 wt % or less of higher oligomers, where the higher oligomers are oligomers that have a degree of polymerization of 3 or more); and b) introducing the first reactor effluent and a second alpha-olefin to a second catalyst composition comprising an acid catalyst, such as BF3, in a second reactor to form a second reactor effluent comprising PAO trimer.Type: GrantFiled: October 28, 2020Date of Patent: May 30, 2023Assignee: ExxonMobil Chemical Patents Inc.Inventors: Jennifer L. Rapp, Patrick C. Chen, Jo Ann M. Canich, Mark H. Li, Jian Yang, Catherine A. Faler, Margaret T. Whalley, Andrew E. Atalla
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Patent number: 11525020Abstract: The present disclosure generally relates to processes to produce alpha-olefin oligomers and poly alpha-olefins. In an embodiment, a process to produce a poly alpha-olefin (PAO) includes introducing a first alpha-olefin and a first catalyst system comprising a metallocene compound into a continuous stirred tank reactor or a continuous tubular reactor under first reactor conditions to form a first reactor effluent. The alpha-olefin is introduced to the reactor at a flow rate of about 100 g/hr or more. The first reactor effluent includes PAO dimer comprising at least 96 mol % of vinylidene and 4 mol % or less of trisubstituted vinylene and disubstituted vinylene, based on total moles of vinylidene, trisubstituted vinylene, and disubstituted vinylene. The method includes introducing the first reactor effluent, a second alpha-olefin and a second catalyst composition comprising an acid catalyst into a second reactor under second reactor conditions to form a second reactor effluent comprising PAO trimer.Type: GrantFiled: June 28, 2021Date of Patent: December 13, 2022Assignee: ExxonMobil Chemical Patents Inc.Inventors: Patrick C. Chen, Mark H. Li, Jennifer L. Rapp, Monica D. Lotz, Babak LotfizadehDehkordi, Craig J. Emett, Najeeb M. Kuzhiyil, Jian Yang
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Publication number: 20220298087Abstract: The present disclosure provides processes and apparatus for producing poly alpha olefins. In at least one embodiment, a process to produce a poly alpha olefin includes introducing a first olefin monomer to a first catalyst and an activator in a first reactor to form a first reactor effluent comprising an olefin dimer and an olefin trimer. The process includes introducing the first reactor effluent to a filtration unit to form a filtration effluent, and introducing the filtration effluent to a first distillation unit to form a first distillation effluent. The process includes introducing the first distillation effluent (or a second distillation effluent) to a second catalyst in a second reactor to form a second reactor effluent comprising the olefin trimer. The process includes removing a sample at any stage of the process and introducing the sample to a gas chromatograph.Type: ApplicationFiled: June 3, 2020Publication date: September 22, 2022Inventors: Monica D. Lotz, Frank N. Raushel, Timothy M. Boller, Mark H. Li, Kyle G. Lewis, Jennifer L. Rapp
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Publication number: 20220127392Abstract: The present disclosure generally relates to processes to produce alpha-olefin oligomers and poly alpha-olefins. In an embodiment, a process to produce a poly alpha-olefin (PAO) includes introducing a first alpha-olefin and a first catalyst system comprising a metallocene compound into a continuous stirred tank reactor or a continuous tubular reactor under first reactor conditions to form a first reactor effluent. The alpha-olefin is introduced to the reactor at a flow rate of about 100 g/hr or more. The first reactor effluent includes PAO dimer comprising at least 96 mol % of vinylidene and 4 mol % or less of trisubstituted vinylene and disubstituted vinylene, based on total moles of vinylidene, trisubstituted vinylene, and disubstituted vinylene. The method includes introducing the first reactor effluent, a second alpha-olefin and a second catalyst composition comprising an acid catalyst into a second reactor under second reactor conditions to form a second reactor effluent comprising PAO trimer.Type: ApplicationFiled: June 28, 2021Publication date: April 28, 2022Inventors: Patrick C. Chen, Mark H. Li, Jennifer L. Rapp, Monica D. Lotz, Babak LotfizadehDehkordi, Craig J. Emett, Najeeb M. Kuzhiyil, Jian Yang
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Publication number: 20210284769Abstract: In at least one embodiment, a process to produce a poly alpha-olefin (PAO) includes introducing a first alpha-olefin to a first catalyst system comprising activator and a metallocene compound into a continuous stirred tank reactor or a continuous tubular reactor under first reactor conditions to form a first reactor effluent. The first alpha-olefin is introduced to the reactor at a flow rate of about 100 g/hr or more. The first reactor effluent includes at least 60 wt % of PAO dimer and 40 wt % or less of higher oligomers, where the higher oligomers are oligomers that have a degree of polymerization of 3 or more. The process includes introducing the first reactor effluent and a second alpha-olefin to a second catalyst composition including an acid catalyst in a second reactor to form a second reactor effluent comprising PAO trimer.Type: ApplicationFiled: May 3, 2021Publication date: September 16, 2021Inventors: Patrick C. Chen, Mark H. Li, Jennifer L. Rapp, Pramod J. Nandapurkar, Brian H. Wahn, Babak LotfizadehDehkordi, Craig J. Emett, Najeeb M. Kuzhiyil, Jian Yang
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Patent number: 11078308Abstract: The present disclosure generally relates to processes to produce alpha-olefin oligomers and poly alpha-olefins. In an embodiment, a process to produce a poly alpha-olefin (PAO) includes introducing a first alpha-olefin and a first catalyst system comprising a metallocene compound into a continuous stirred tank reactor or a continuous tubular reactor under first reactor conditions to form a first reactor effluent. The alpha-olefin is introduced to the reactor at a flow rate of about 100 g/hr or more. The first reactor effluent includes PAO dimer comprising at least 96 mol % of vinylidene and 4 mol % or less of trisubstituted vinylene and disubstituted vinylene, based on total moles of vinylidene, trisubstituted vinylene, and disubstituted vinylene. The method includes introducing the first reactor effluent, a second alpha-olefin and a second catalyst composition comprising an acid catalyst into a second reactor under second reactor conditions to form a second reactor effluent comprising PAO trimer.Type: GrantFiled: August 9, 2019Date of Patent: August 3, 2021Assignee: ExxonMobil Chemical Patents Inc.Inventors: Patrick C. Chen, Mark H. Li, Jennifer L. Rapp, Monica D. Lotz, Babak LotfizadehDehkordi, Craig J. Emett, Najeeb M. Kuzhiyil, Jian Yang
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Patent number: 11028197Abstract: In at least one embodiment, a process to produce a poly alpha-olefin (PAO) includes introducing a first alpha-olefin to a first catalyst system comprising activator and a metallocene compound into a continuous stirred tank reactor or a continuous tubular reactor under first reactor conditions to form a first reactor effluent. The first alpha-olefin is introduced to the reactor at a flow rate of about 100 g/hr or more. The first reactor effluent includes at least 60 wt % of PAO dimer and 40 wt % or less of higher oligomers, where the higher oligomers are oligomers that have a degree of polymerization of 3 or more. The process includes introducing the first reactor effluent and a second alpha-olefin to a second catalyst composition including an acid catalyst in a second reactor to form a second reactor effluent comprising PAO trimer.Type: GrantFiled: August 9, 2019Date of Patent: June 8, 2021Assignee: ExxonMobil Chemical Patents Inc.Inventors: Patrick C. Chen, Mark H. Li, Jennifer L. Rapp, Pramod J. Nandapurkar, Brian H. Wahn, Babak LotfizadehDehkordi, Craig J. Emett, Najeeb M. Kuzhiyil, Jian Yang
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Publication number: 20210122859Abstract: The present disclosure generally relates to process to produce a poly alpha-olefin (PAO), comprising: a) introducing a first alpha-olefin to a first catalyst system comprising non-aromatic hydrocarbon soluble activator and a metallocene compound into a continuous stirred tank reactor or a continuous tubular reactor under first reactor conditions, wherein the first alpha-olefin is preferably introduced to the reactor at a flow rate of about 100 g/hr or more, to form a first reactor effluent comprising PAO (such as at least 60 wt % of PAO dimer and 40 wt % or less of higher oligomers, where the higher oligomers are oligomers that have a degree of polymerization of 3 or more); and b) introducing the first reactor effluent and a second alpha-olefin to a second catalyst composition comprising an acid catalyst, such as BF3, in a second reactor to form a second reactor effluent comprising PAO trimer.Type: ApplicationFiled: October 28, 2020Publication date: April 29, 2021Inventors: Jennifer L. Rapp, Patrick C. Chen, Jo Ann M Canich, Mark H. Li, Jian Yang, Catherine A. Faler, Margaret T. Whalley, Andrew E. Atalla
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Publication number: 20190359744Abstract: The present disclosure generally relates to processes to produce alpha-olefin oligomers and poly alpha-olefins. In an embodiment, a process to produce a poly alpha-olefin (PAO) includes introducing a first alpha-olefin and a first catalyst system comprising a metallocene compound into a continuous stirred tank reactor or a continuous tubular reactor under first reactor conditions to form a first reactor effluent. The alpha-olefin is introduced to the reactor at a flow rate of about 100 g/hr or more. The first reactor effluent includes PAO dimer comprising at least 96 mol % of vinylidene and 4 mol % or less of trisubstituted vinylene and disubstituted vinylene, based on total moles of vinylidene, trisubstituted vinylene, and disubstituted vinylene. The method includes introducing the first reactor effluent, a second alpha-olefin and a second catalyst composition comprising an acid catalyst into a second reactor under second reactor conditions to form a second reactor effluent comprising PAO trimer.Type: ApplicationFiled: August 9, 2019Publication date: November 28, 2019Inventors: Patrick C. Chen, Mark H. Li, Jennifer L. Rapp, Monica D. Lotz, Babak LotfizadehDehkordi, Craig J. Emett, Najeeb M. Kuzhiyil, Jian Yang
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Publication number: 20190359748Abstract: In at least one embodiment, a process to produce a poly alpha-olefin (PAO) includes introducing a first alpha-olefin to a first catalyst system comprising activator and a metallocene compound into a continuous stirred tank reactor or a continuous tubular reactor under first reactor conditions to form a first reactor effluent. The first alpha-olefin is introduced to the reactor at a flow rate of about 100 g/hr or more. The first reactor effluent includes at least 60 wt % of PAO dimer and 40 wt % or less of higher oligomers, where the higher oligomers are oligomers that have a degree of polymerization of 3 or more. The process includes introducing the first reactor effluent and a second alpha-olefin to a second catalyst composition including an acid catalyst in a second reactor to form a second reactor effluent comprising PAO trimer.Type: ApplicationFiled: August 9, 2019Publication date: November 28, 2019Inventors: Patrick C. Chen, Mark H. Li, Jennifer L. Rapp, Pramod J. Nandapurkar, Brian H. Wahn, Babak LotfizadehDehkordi, Craig J. Emett, Najeeb M. Kuzhiyil, Jian Yang