Patents by Inventor Daniel G. Hert
Daniel G. Hert 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: 20230193001Abstract: A method of operating a polyethylene reactor system includes feeding ethylene, an optional first comonomer, a diluent, and a chromium-based catalyst to a first polymerization reactor. The method further includes contacting ethylene and the comonomer with the catalyst in the first polymerization reactor to form a first product including a first polyethylene. The method further includes feeding the first product from the first polymerization reactor to a second polymerization reactor. The method further includes contacting ethylene and a second optional comonomer with catalyst from the first reactor in the second polymerization reactor to form a second product including the first polyethylene and a second polyethylene. The method further includes controlling one or both of a molecular weight or a breadth of molecular weight distribution of the second product by adjusting a rate of hydrogen fed to one or both of the first polymerization reactor or the second polymerization reactor.Type: ApplicationFiled: December 18, 2021Publication date: June 22, 2023Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY LPInventors: Daniel G. Hert, Bryan G. Kubsch
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Patent number: 11125688Abstract: A method of monitoring a solid component of a reactor feed stream in a polymer production system, comprising (a) measuring a turbidity of the reactor feed stream, wherein the reactor feed stream comprises a solid component of a polymerization catalyst system, and (b) translating the turbidity of the reactor feed stream into a concentration of the solid component in the reactor feed stream. A method of monitoring a solid component of a reactor feed stream in a polymer production system, comprising (a) measuring a turbidity of a precontactor feed stream, wherein the precontactor feed stream comprises a solid component of a polymerization catalyst system, and (b) translating the turbidity of the precontactor feed stream into a concentration of the solid component in a precontactor effluent stream, wherein the precontactor effluent stream comprises the reactor feed stream.Type: GrantFiled: June 19, 2020Date of Patent: September 21, 2021Assignee: Chevron Phillips Chemical Company LPInventors: Eric D. Schwerdtfeger, Daniel G. Hert, Max P. McDaniel
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Patent number: 11065595Abstract: The present disclosure relates generally to a system having a reactor system with a polymerization reactor and a feed system fluidly coupled to a feed inlet of the reactor. The feed system supplies components to the reactor via the feed inlet, and the reactor has a flow path that continuously conveys the components through the reactor and subjects the components to polymerization conditions to produce a polymer. The system also has an analysis system coupled to the reactor for online monitoring of a particle size of the polymer. Further, the system includes a control system, coupled to the analysis and feed systems, that receives a signal from the analysis system indicative of the monitored particle size of the polymer and adjusts an operating parameter of the feed system to control a flow rate of at least one of the components to the reactor based at least on the signal.Type: GrantFiled: November 7, 2019Date of Patent: July 20, 2021Assignee: Chevron Phillips Chemical Company LPInventors: Eric D. Schwerdtfeger, Daniel G. Hert, Eric J. Netemeyer
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Patent number: 10899855Abstract: Disclosed herein are ethylene-based polymers produced using dual metallocene catalyst systems. These polymers have low densities, high molecular weights, and broad molecular weight distributions, as well as having the majority of the long chain branches in the lower molecular weight component of the polymer, and the majority of the short chain branches in the higher molecular weight component of the polymer. Films produced from these polymers have improved impact and puncture resistance.Type: GrantFiled: October 22, 2018Date of Patent: January 26, 2021Assignee: Chevron Phillips Chemical Company LPInventors: Ashish M. Sukhadia, Max P. McDaniel, Errun Ding, Guylaine St. Jean, Qing Yang, Daniel G. Hert, Chung Ching Tso
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Publication number: 20200319103Abstract: A method of monitoring a solid component of a reactor feed stream in a polymer production system, comprising (a) measuring a turbidity of the reactor feed stream, wherein the reactor feed stream comprises a solid component of a polymerization catalyst system, and (b) translating the turbidity of the reactor feed stream into a concentration of the solid component in the reactor feed stream. A method of monitoring a solid component of a reactor feed stream in a polymer production system, comprising (a) measuring a turbidity of a precontactor feed stream, wherein the precontactor feed stream comprises a solid component of a polymerization catalyst system, and (b) translating the turbidity of the precontactor feed stream into a concentration of the solid component in a precontactor effluent stream, wherein the precontactor effluent stream comprises the reactor feed stream.Type: ApplicationFiled: June 19, 2020Publication date: October 8, 2020Inventors: Eric D. Schwerdtfeger, Daniel G. Hert, Max P. McDaniel
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Patent number: 10768106Abstract: A method of monitoring a solid component of a reactor feed stream in a polymer production system, comprising (a) measuring a turbidity of the reactor feed stream, wherein the reactor feed stream comprises a solid component of a polymerization catalyst system, and (b) translating the turbidity of the reactor feed stream into a concentration of the solid component in the reactor feed stream. A method of monitoring a solid component of a reactor feed stream in a polymer production system, comprising (a) measuring a turbidity of a precontactor feed stream, wherein the precontactor feed stream comprises a solid component of a polymerization catalyst system, and (b) translating the turbidity of the precontactor feed stream into a concentration of the solid component in a precontactor effluent stream, wherein the precontactor effluent stream comprises the reactor feed stream.Type: GrantFiled: December 10, 2019Date of Patent: September 8, 2020Assignee: Chevron Phillips Chemical Company LPInventors: Eric D. Schwerdtfeger, Daniel G. Hert, Max P. McDaniel
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Publication number: 20200110027Abstract: A method of monitoring a solid component of a reactor feed stream in a polymer production system, comprising (a) measuring a turbidity of the reactor feed stream, wherein the reactor feed stream comprises a solid component of a polymerization catalyst system, and (b) translating the turbidity of the reactor feed stream into a concentration of the solid component in the reactor feed stream. A method of monitoring a solid component of a reactor feed stream in a polymer production system, comprising (a) measuring a turbidity of a precontactor feed stream, wherein the precontactor feed stream comprises a solid component of a polymerization catalyst system, and (b) translating the turbidity of the precontactor feed stream into a concentration of the solid component in a precontactor effluent stream, wherein the precontactor effluent stream comprises the reactor feed stream.Type: ApplicationFiled: December 10, 2019Publication date: April 9, 2020Inventors: Eric D. Schwerdtfeger, Daniel G. Hert, Max P. McDaniel
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Publication number: 20200070118Abstract: The present disclosure relates generally to a system having a reactor system with a polymerization reactor and a feed system fluidly coupled to a feed inlet of the reactor. The feed system supplies components to the reactor via the feed inlet, and the reactor has a flow path that continuously conveys the components through the reactor and subjects the components to polymerization conditions to produce a polymer. The system also has an analysis system coupled to the reactor for online monitoring of a particle size of the polymer. Further, the system includes a control system, coupled to the analysis and feed systems, that receives a signal from the analysis system indicative of the monitored particle size of the polymer and adjusts an operating parameter of the feed system to control a flow rate of at least one of the components to the reactor based at least on the signal.Type: ApplicationFiled: November 7, 2019Publication date: March 5, 2020Inventors: Eric D. SCHWERDTFEGER, Daniel G. HERT, Eric J. NETEMEYER
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Patent number: 10549251Abstract: The present disclosure relates generally to a system having a reactor system with a polymerization reactor and a feed system fluidly coupled to a feed inlet of the reactor. The feed system supplies components to the reactor via the feed inlet, and the reactor has a flow path that continuously conveys the components through the reactor and subjects the components to polymerization conditions to produce a polymer. The system also has an analysis system coupled to the reactor for online monitoring of a particle size of the polymer. Further, the system includes a control system, coupled to the analysis and feed systems, that receives a signal from the analysis system indicative of the monitored particle size of the polymer and adjusts an operating parameter of the feed system to control a flow rate of at least one of the components to the reactor based at least on the signal.Type: GrantFiled: September 20, 2017Date of Patent: February 4, 2020Assignee: Chevron Phillips Chemical Company LPInventors: Eric D. Schwerdtfeger, Daniel G. Hert, Eric J. Netemeyer
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Patent number: 10539503Abstract: A method of monitoring a solid component of a reactor feed stream in a polymer production system, comprising (a) measuring a turbidity of the reactor feed stream, wherein the reactor feed stream comprises a solid component of a polymerization catalyst system, and (b) translating the turbidity of the reactor feed stream into a concentration of the solid component in the reactor feed stream. A method of monitoring a solid component of a reactor feed stream in a polymer production system, comprising (a) measuring a turbidity of a precontactor feed stream, wherein the precontactor feed stream comprises a solid component of a polymerization catalyst system, and (b) translating the turbidity of the precontactor feed stream into a concentration of the solid component in a precontactor effluent stream, wherein the precontactor effluent stream comprises the reactor feed stream.Type: GrantFiled: December 1, 2017Date of Patent: January 21, 2020Assignee: Chevron Phillips Chemical Company LPInventors: Eric D. Schwerdtfeger, Daniel G. Hert, Max P. McDaniel
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Publication number: 20190083950Abstract: The present disclosure relates generally to a system having a reactor system with a polymerization reactor and a feed system fluidly coupled to a feed inlet of the reactor. The feed system supplies components to the reactor via the feed inlet, and the reactor has a flow path that continuously conveys the components through the reactor and subjects the components to polymerization conditions to produce a polymer. The system also has an analysis system coupled to the reactor for online monitoring of a particle size of the polymer. Further, the system includes a control system, coupled to the analysis and feed systems, that receives a signal from the analysis system indicative of the monitored particle size of the polymer and adjusts an operating parameter of the feed system to control a flow rate of at least one of the components to the reactor based at least on the signal.Type: ApplicationFiled: September 20, 2017Publication date: March 21, 2019Inventors: Eric D. SCHWERDTFEGER, Daniel G. HERT, Eric J. NETEMEYER
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Patent number: 10214603Abstract: A polyolefin having a density of greater than about 0.930 g/ml which when extruded at a temperature in the range of from about 590° F. to about 645° F. and then coated onto a substrate at a rate of from about 300 ft/min to about 1000 ft/min has an edge weave of from about 0 in/side to about 2.5 in/side and a neck-in of less than about 3.0 in/side.Type: GrantFiled: May 16, 2018Date of Patent: February 26, 2019Assignee: Chevron Phillips Chemical Company LPInventors: Chung Tso, Carlos A. Cruz, Qing Yang, Max P. McDaniel, Jared L. Barr, Youlu Yu, Yongwoo Inn, Ashish M. Sukhadia, Brandy Rutledge-Ryal, Daniel G. Hert, Kelly Frey, Bill Bridendolph, William Fisher
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Publication number: 20190055329Abstract: Disclosed herein are ethylene-based polymers produced using dual metallocene catalyst systems. These polymers have low densities, high molecular weights, and broad molecular weight distributions, as well as having the majority of the long chain branches in the lower molecular weight component of the polymer, and the majority of the short chain branches in the higher molecular weight component of the polymer. Films produced from these polymers have improved impact and puncture resistance.Type: ApplicationFiled: October 22, 2018Publication date: February 21, 2019Inventors: Ashish M. Sukhadia, Max P. McDaniel, Errun Ding, Guylaine St. Jean, Qing Yang, Daniel G. Hert, Chung Ching Tso
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Patent number: 10184018Abstract: Disclosed herein are ethylene-based polymers having a density greater than 0.945 g/cm3, a high load melt index less than 25 g/10 min, a peak molecular weight ranging from 52,000 to 132,000 g/mol, and an environmental stress crack resistance of at least 250 hours. These polymers have the processability of chromium-based resins, but with improved impact strength and stress crack resistance, and can be used in large-part blow molding applications.Type: GrantFiled: December 15, 2016Date of Patent: January 22, 2019Assignee: Chevron Phillips Chemical Company LPInventors: Mark L. Hlavinka, Qing Yang, Yongwoo Inn, William M. Whitte, John R. Rathman, Steven J. Secora, Daniel G. Hert
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Patent number: 10113016Abstract: Disclosed herein are ethylene-based polymers produced using dual metallocene catalyst systems. These polymers have low densities, high molecular weights, and broad molecular weight distributions, as well as having the majority of the long chain branches in the lower molecular weight component of the polymer, and the majority of the short chain branches in the higher molecular weight component of the polymer. Films produced from these polymers have improved impact and puncture resistance.Type: GrantFiled: February 9, 2017Date of Patent: October 30, 2018Assignee: Chevron Phillips Chemical Company LPInventors: Ashish M. Sukhadia, Max P. McDaniel, Errun Ding, Guylaine St. Jean, Qing Yang, Daniel G. Hert, Chung Ching Tso
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Publication number: 20180298129Abstract: A polyolefin having a density of greater than about 0.930 g/ml which when extruded at a temperature in the range of from about 590° F. to about 645° F. and then coated onto a substrate at a rate of from about 300 ft/min to about 1000 ft/min has an edge weave of from about 0 in/side to about 2.5 in/side and a neck-in of less than about 3.0 in/side.Type: ApplicationFiled: May 16, 2018Publication date: October 18, 2018Inventors: Chung TSO, Carlos A. CRUZ, Qing YANG, Max P. MCDANIEL, Jared L. BARR, Youlu YU, Yongwoo INN, Ashish M. SUKHADIA, Brandy RUTLEDGE-RYAL, Daniel G. HERT, Kelly FREY, Bill BRIDENDOLPH, William FISHER
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Patent number: 9975976Abstract: A polyolefin having a density of greater than about 0.930 g/ml which when extruded at a temperature in the range of from about 590° F. to about 645° F. and then coated onto a substrate at a rate of from about 300 ft/min to about 1000 ft/min has an edge weave of from about 0 in/side to about 2.5 in/side and a neck-in of less than about 3.0 in/side.Type: GrantFiled: April 17, 2017Date of Patent: May 22, 2018Assignee: Chevron Phillips Chemical Company LPInventors: Chung Tso, Jared L. Barr, Kelly Frey, Carlos A. Cruz, Youlu Yu, Bill Bridendolph, Qing Yang, Yongwoo Inn, William Fisher, Max P. McDaniel, Ashish M. Sukhadia, Brandy Rutledge-Ryal, Daniel G. Hert
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Patent number: 9970869Abstract: A method of monitoring a solid component of a reactor feed stream in a polymer production system, comprising (a) measuring a turbidity of the reactor feed stream, wherein the reactor feed stream comprises a solid component of a polymerization catalyst system, and (b) translating the turbidity of the reactor feed stream into a concentration of the solid component in the reactor feed stream. A method of monitoring a solid component of a reactor feed stream in a polymer production system, comprising (a) measuring a turbidity of a precontactor feed stream, wherein the precontactor feed stream comprises a solid component of a polymerization catalyst system, and (b) translating the turbidity of the precontactor feed stream into a concentration of the solid component in a precontactor effluent stream, wherein the precontactor effluent stream comprises the reactor feed stream.Type: GrantFiled: July 24, 2015Date of Patent: May 15, 2018Assignee: Chevron Phillips Chemical Company LPInventors: Eric D. Schwerdtfeger, Daniel G. Hert, Max P. McDaniel
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Publication number: 20180088046Abstract: A method of monitoring a solid component of a reactor feed stream in a polymer production system, comprising (a) measuring a turbidity of the reactor feed stream, wherein the reactor feed stream comprises a solid component of a polymerization catalyst system, and (b) translating the turbidity of the reactor feed stream into a concentration of the solid component in the reactor feed stream. A method of monitoring a solid component of a reactor feed stream in a polymer production system, comprising (a) measuring a turbidity of a precontactor feed stream, wherein the precontactor feed stream comprises a solid component of a polymerization catalyst system, and (b) translating the turbidity of the precontactor feed stream into a concentration of the solid component in a precontactor effluent stream, wherein the precontactor effluent stream comprises the reactor feed stream.Type: ApplicationFiled: December 1, 2017Publication date: March 29, 2018Inventors: Eric D. Schwerdtfeger, Daniel G. Hert, Max P. McDaniel
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Publication number: 20170145123Abstract: Disclosed herein are ethylene-based polymers produced using dual metallocene catalyst systems. These polymers have low densities, high molecular weights, and broad molecular weight distributions, as well as having the majority of the long chain branches in the lower molecular weight component of the polymer, and the majority of the short chain branches in the higher molecular weight component of the polymer. Films produced from these polymers have improved impact and puncture resistance.Type: ApplicationFiled: February 9, 2017Publication date: May 25, 2017Inventors: Ashish M. Sukhadia, Max P. McDaniel, Errun Ding, Guylaine St. Jean, Qing Yang, Daniel G. Hert, Chung Ching Tso