Patents by Inventor Luc Martens
Luc Martens 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: 11873263Abstract: The present invention concerns a process for oligomerizing an olefin feedstock to form an oligomerization product, and a method of controlling such an oligomerization process. The process comprises oligomerizing propylene to form a Cn olefin, including contacting a feed stream comprising propylene and a recycle fraction with a solid phosphoric acid oligomerization catalyst under effective oligomerization conditions in an oligomerization reactor to produce an oligomerization effluent; and fractionating the oligomerization effluent to obtain a product fraction and the recycle fraction, the product fraction comprising the Cn olefin and the recycle fraction comprising a Cn-3 olefin; wherein the recycle fraction comprises at least 80 wt % of the Cn-3 olefin, based on the weight of the recycle fraction; and wherein n is 9, or 12.Type: GrantFiled: March 10, 2020Date of Patent: January 16, 2024Assignee: ExxonMobil Chemical Patents Inc.Inventors: Andrew Wiersum, Paul Hamilton, Luc Martens, Sara Garcia Frutos, Marcel Janssen
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Publication number: 20230201573Abstract: A method includes providing a first electrically conductive element over a top surface of a substrate. The method includes measuring at least one parameter indicative of the shape or dimensions of the first electrically conductive element. The method includes simulating the first electrically conductive element and a dielectric wall surrounding the first electrically conductive element for a plurality of wall heights by using the at least one parameter as an input. The method includes for each wall height, computing the maximum current density present at a surface of the first electrically conductive element. The method includes determining, from the maximum current densities, wall height(s) for which the maximum current density is below a threshold. Furthermore, the method includes providing a second electrically conductive element, identical to the first electrically conductive element, surrounded by a wall having a wall height of the determined wall height(s).Type: ApplicationFiled: December 19, 2022Publication date: June 29, 2023Inventors: Denys Nikolayev, Wout Joseph, Luc Martens, Alexandru Andrei, Carolina Mora Lopez, Emmeric Tanghe
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Publication number: 20230132834Abstract: Example embodiments describe a method for estimating a number of persons present in a room including i) obtaining measurements of electromagnetic sounding signals transmitted within the room; ii) determining at least one reverberation time from the measurements; iii) determining the number of people in the room based on the at least one reverberation time, on a room parameter indicative for a capacity of the room for absorbing the signals and a person parameter indicative for an average capacity of a person for absorbing the signals.Type: ApplicationFiled: March 11, 2021Publication date: May 4, 2023Inventors: Marwan YUSUF, Emmeric TANGHE, Wout JOSEPH, Luc MARTENS
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Patent number: 11512035Abstract: The present disclosure provides a method for forming oxygenates from olefins which includes hydroformylation of aldehydes as a formyl source alternative to syngas. In at least one embodiment, a hydroformylation process is performed at low-temperature and at or near ambient pressure for the conversion of olefins into aldehydes, thus reducing the formation of by-products such as via double bond or skeletal isomerization of the feedstock; or via further conversion of the formed aldehydes and alcohols. In at least one embodiment, the use of gaseous olefinic products (e.g., ethylene) instead of strained olefins (e.g., norbornene) improves the control equilibria in transfer hydroformylation reactions.Type: GrantFiled: August 20, 2019Date of Patent: November 29, 2022Assignee: ExxonMobil Chemical Patents Inc.Inventors: Alex Carpenter, Andrew Wiersum, Luc Martens
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Publication number: 20220234967Abstract: The present invention concerns a process for oligomerizing an olefin feedstock to form an oligomerization product, and a method of controlling such an oligomerization process. The process comprises oligomerizing propylene to form a Cn olefin, including contacting a feed stream comprising propylene and a recycle fraction with a solid phosphoric acid oligomerization catalyst under effective oligomerization conditions in an oligomerization reactor to produce an oligomerization effluent; and fractionating the oligomerization effluent to obtain a product fraction and the recycle fraction, the product fraction comprising the Cn olefin and the recycle fraction comprising a Cn-3 olefin; wherein the recycle fraction comprises at least 80 wt % of the Cn-3 olefin, based on the weight of the recycle fraction; and wherein n is 9, or 12.Type: ApplicationFiled: March 10, 2020Publication date: July 28, 2022Inventors: Andrew Wiersum, Paul Hamilton, Luc Martens, Sara Garcla Frutos, Marcel Janssen
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Publication number: 20220041537Abstract: The present disclosure provides a method for forming oxygenates from olefins which includes hydroformylation of aldehydes as a formyl source alternative to syngas. In at least one embodiment, a hydroformylation process is performed at low-temperature and at or near ambient pressure for the conversion of olefins into aldehydes, thus reducing the formation of by-products such as via double bond or skeletal isomerization of the feedstock; or via further conversion of the formed aldehydes and alcohols. In at least one embodiment, the use of gaseous olefinic products (e.g., ethylene) instead of strained olefins (e.g., norbornene) improves the control equilibria in transfer hydroformylation reactions.Type: ApplicationFiled: August 20, 2019Publication date: February 10, 2022Inventors: Alex Carpenter, Andrew Wiersum, Luc Martens
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Patent number: 9910109Abstract: A method and system for determining a whole-body averaged specific absorption ratio (SARwb) in a person comprises positioning an exposimeter on the person's body and providing a chamber forming an electromagnetic (EM) cavity and comprising a radiofrequency emitter and receiver; determining a first reverberation time of decay of EM power and a free-space incident power density in the chamber when the person is absent, and determining, a second reverberation time of decay of EM power in the chamber and a reference received power, received by the exposimeter, when the person is present in the chamber; and determining an absorption cross section of the person taking the first and second reverberation time and a volume of the chamber into account, determining a calibration factor relating a received power on the exposimeter to the SARwb, measuring a received power using the exposimeter, and determining the SARwb by applying the calibration factor.Type: GrantFiled: February 10, 2017Date of Patent: March 6, 2018Assignee: UNIVERSITEIT GENTInventors: Arno Thielens, Wout Joseph, Luc Martens
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Publication number: 20170234943Abstract: A method and system for determining a whole-body averaged specific absorption ratio (SARwb) in a person comprises positioning an exposimeter on the person's body and providing a chamber forming an electromagnetic (EM) cavity and comprising a radiofrequency emitter and receiver; determining a first reverberation time of decay of EM power and a free-space incident power density in the chamber when the person is absent, and determining, a second reverberation time of decay of EM power in the chamber and a reference received power, received by the exposimeter, when the person is present in the chamber; and determining an absorption cross section of the person taking the first and second reverberation time and a volume of the chamber into account, determining a calibration factor relating a received power on the exposimeter to the SARwb, measuring a received power using the exposimeter, and determining the SARwb by applying the calibration factor.Type: ApplicationFiled: February 10, 2017Publication date: August 17, 2017Inventors: Arno THIELENS, Wout JOSEPH, Luc MARTENS
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Publication number: 20170234915Abstract: A method and system for determining a whole-body averaged specific absorption ratio (SARwb) in a person comprises positioning an exposimeter on the person's body and providing a chamber forming an electromagnetic (EM) cavity and comprising a radiofrequency emitter and receiver; determining a first reverberation time of decay of EM power and a free-space incident power density in the chamber when the person is absent, and determining, a second reverberation time of decay of EM power in the chamber and a reference received power, received by the exposimeter, when the person is present in the chamber; and determining an absorption cross section of the person taking the first and second reverberation time and a volume of the chamber into account, determining a calibration factor relating a received power on the exposimeter to the SARwb, measuring a received power using the exposimeter, and determining the SARwb by applying the calibration factor.Type: ApplicationFiled: February 12, 2016Publication date: August 17, 2017Inventors: Arno THIELENS, Luc MARTENS, Wout JOSEPH
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Publication number: 20080033226Abstract: Metalloaluminophosphate molecular sieves and metalloaluminophosphate molecular sieve catalyst particles are protecting from degradation by water by maintaining said molecular sieves or catalysts in contact with a liquid mixture of alcohol and water, the mixture of alcohol and water containing from 45 wt % to 99.8 wt % alcohol. The metalloaluminophosphate molecular sieves and metalloaluminophosphate molecular sieve catalyst particles which have been protected in such fashion catalyze the conversion of feedstocks to hydrocarbons.Type: ApplicationFiled: June 14, 2007Publication date: February 7, 2008Inventors: Marcel Janssen, Luc Martens
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Publication number: 20070282133Abstract: Propylene streams obtained by the conversion of oxygenates to olefins are used as feeds for hydroformylation. The streams may contain measurable amounts of dimethyl ether without adversely impacting the hydroformylation.Type: ApplicationFiled: January 28, 2005Publication date: December 6, 2007Inventors: Raphael Caers, Hubertus Beckers, Eddy Van Driessche, Luc Martens, John Godsmark, John Shutt
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Publication number: 20070260100Abstract: This invention provides methods of making molecular sieve catalyst particles, molecular sieve slurries that can be used in such methods, molecular sieve catalyst compositions and their use in catalytic hydrocarbon conversion processes. In one of its aspects, the invention provides a method of making molecular sieve catalyst particles, the method comprising the steps of: a) providing a solution or suspension of an aluminum-containing inorganic oxide precursor in a liquid medium; b) combining the solution or suspension of aluminum-containing inorganic oxide precursor with a molecular sieve, and optionally other formulating agents, to form a catalyst formulation slurry; c) aging the catalyst formulation slurry to generate in said slurry a percentage, or increase in said slurry the existing percentage, of aluminum atoms of the aluminum-containing precursor in the form of oligomers having a sharp 27 Al NMR peak at 62-63 ppm; and d) forming molecular sieve catalyst particles from the catalyst formulation slurry.Type: ApplicationFiled: June 14, 2007Publication date: November 8, 2007Inventors: Yun-Feng Cheng, Stephen Vaughn, Kenneth Clem, Luc Martens, Weiguo Hu
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Publication number: 20070249885Abstract: This invention provides methods of making molecular sieve catalyst particles, molecular sieve slurries that can be used in such methods, molecular sieve catalyst compositions and their use in catalytic hydrocarbon conversion processes. In one of its aspects, the invention provides a method of making molecular sieve catalyst particles, the method comprising the steps of: a) providing a solution or suspension of an aluminum-containing inorganic oxide precursor in a liquid medium; b) combining the solution or suspension of aluminum-containing inorganic oxide precursor with a molecular sieve, and optionally other formulating agents, to form a catalyst formulation slurry; c) aging the catalyst formulation slurry to generate in said slurry a percentage, or increase in said slurry the existing percentage, of aluminum atoms of the aluminum-containing precursor in the form of oligomers having a sharp 27Al NMR peak at 62-63 ppm; and d) forming molecular sieve catalyst particles from the catalyst formulation slurry.Type: ApplicationFiled: June 14, 2007Publication date: October 25, 2007Inventors: Yun-Feng Chang, Stephen Vaughn, Kenneth Clem, Luc Martens, Weiguo Hu
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Publication number: 20070238911Abstract: The invention relates to a molecular sieve catalyst composition, to a method of making or forming the molecular sieve catalyst composition, and to a conversion process using the catalyst composition. In particular, the invention is directed to a molecular sieve catalyst composition of a molecular sieve, a binder and a matrix material, wherein the weight ratio of the binder to the molecular sieve is controlled to provide an improved attrition resistant catalyst composition, particularly useful in a conversion process for producing olefin(s), preferably ethylene and/or propylene, from a feedstock, preferably an oxygenate containing feedstock.Type: ApplicationFiled: May 25, 2007Publication date: October 11, 2007Inventors: Yun-feng Chang, Stephen Vaughn, Luc Martens, Kenneth Clem
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Publication number: 20070112220Abstract: Mixed butene streams containing butene-1 and isobutylene and optionally butene-2 are hydroformylated under conditions that hydroformylates all the monomers to yield a mixture of valeraldehydes. Higher temperatures and/or longer residence times and/or higher partial pressure of carbon monoxide than in conventional processes are used to ensure hydroformylation of all the monomers.Type: ApplicationFiled: September 17, 2004Publication date: May 17, 2007Inventors: Raf Caers, Eddy Van Driessche, Huub Beckers, Luc Martens, Georges Mathys, John Shutt
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Publication number: 20060205587Abstract: This invention is directed to a hardened molecular sieve catalyst composition, a method of making the composition and a method of using the composition. The catalyst composition is made by mixing together molecular sieve, liquid, and an effective hardening amount of a dried molecular sieve catalyst to form a slurry. The slurry is dried, and then calcined to form the hardened molecular sieve catalyst composition. The hardened molecular sieve catalyst is highly attrition resistant.Type: ApplicationFiled: May 15, 2006Publication date: September 14, 2006Inventors: Yun-Feng Chang, Stephen Vaughn, Luc Martens, Kenneth Clem
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Publication number: 20060173230Abstract: A catalyst composition that comprises an over flocculated molecular sieve and optionally, a phosphorous compound and, optionally, a non-over flocculated molecular sieve. A method of preparing a catalyst composition that comprises mixing an over flocculated molecular sieve and optionally, a phosphorous compound and, optionally, a non-over flocculated molecular sieve.Type: ApplicationFiled: April 19, 2005Publication date: August 3, 2006Inventors: Yun-Feng Chang, Luc Martens, Stephen Vaughn
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Publication number: 20060105904Abstract: The invention relates to a molecular sieve catalyst composition, to a method of making or forming the molecular sieve catalyst composition, and to a conversion process using the catalyst composition. In particular, the invention is directed to a catalyst composition comprising a molecular sieve having a framework including at least [AlO4] and [PO4] tetrahedral units, at least one of a binder and a matrix material and at least one phosphorus compound separate from said molecular sieve wherein, after calcination at 760° C. for 3 hours, said catalyst composition has a microporous surface area in excess of 20% of the microporous surface area of said molecular sieve after calcination at 650° C. in nitrogen for 2 hours. The catalyst composition is particularly useful in a conversion process for producing olefin(s), preferably ethylene and/or propylene, from a feedstock, preferably an oxygenate containing feedstock.Type: ApplicationFiled: December 19, 2005Publication date: May 18, 2006Inventors: Yun-Feng Chang, Stephen Vaughn, Luc Martens, Jeffrey Sprinkle, Ian Walker
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Publication number: 20060094593Abstract: The invention is directed to methods of transfering catalyst particles into and within reaction systems. The reaction systems are those that use catalysts that comprise molecular sieves, particularly metalloaluminophosphate molecular sieves, especially metalloaluminophosphate molecular sieves which are susceptible to loss of catalytic activity due to contact with water molecules. The transfer methods provide appropriate mechanisms for transporting catalyst into and within a reactor to protect against loss of catalytic activity that can occur due to contact with water molecules.Type: ApplicationFiled: November 4, 2004Publication date: May 4, 2006Inventors: James Beech, Neil Stephen, Teng Xu, Luc Martens, Richard Walter
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Publication number: 20060079724Abstract: The invention is directed to methods for protecting metalloaluminophosphate molecular sieves, particularly silicoaluminophosphate (SAPO) molecular sieves, from loss of catalytic activity due to contact with a gas containing water. The methods of the invention provide procedures that enable activated sieve to contact water vapor, within a certain range of time, temperature, and water partial pressure conditions, before the sieve becomes substantially deactivated.Type: ApplicationFiled: November 22, 2005Publication date: April 13, 2006Inventors: Peter Loezos, Shun Fung, Stephen Vaughn, Kenneth Clem, James Beech, Nicolas Coute, Marcel Janssen, Luc Martens, Karl Strohmaier