Patents by Inventor Haiqing Peng
Haiqing Peng 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: 20230399426Abstract: Provided herein are metallocene-catalyzed polyethylene compositions that exhibit a high degree of broad orthogonal composition distribution (“BOCD”), meaning that they have a relatively high degree of short-chain branching in higher-molecular-weight chains, as compared to the short-chain branching in lower-molecular weight chains. The compositions may have 80 to 99.9 wt % units derived from ethylene and 0.1 to 20 wt % units derived from a C3 to C40 ?-olefin comonomer; density from 0.925 to 0.950 g/cm3, melt index (I2.16) within the range from 0.1 to 5 g/10 min, and molecular weight distribution (Mw/Mn) within the range from 4.0 to 8.0.Type: ApplicationFiled: November 22, 2021Publication date: December 14, 2023Inventors: Wen LI, Haiqing PENG, Michael A. LEAF, Kevin A. STEVENS
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Publication number: 20230220136Abstract: In some embodiments, a polyethylene composition includes has 80 wt % to 99.9 wt % ethylene content and 20 wt % to 0.1 wt % a C3 to C40 ?-olefin comonomer content, based on ethylene content plus comonomer content. The composition has a Mw/Mn of 15 to 45, a density of 0.93 g/cm3 to 0.97 g/cm3, a complex viscosity (at 628 rad/s, 190° C.) of 600 Pa*s or less, a zero shear viscosity by Cross model of 150,000 Pa*s to 350,000 Pa*s. It may also have a V index of less than 7. In some embodiments, an article includes the polyethylene composition. In some embodiments, the article is a pipe.Type: ApplicationFiled: June 10, 2021Publication date: July 13, 2023Inventors: Haiqing PENG, Jorge A. GUERRA, Danica L. NGUYEN, Shuhui KANG, Trent J. MOUTON, Truyen T. PHAM
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Patent number: 11680117Abstract: The present disclosure provides processes for producing polyethylene resins. In at least one embodiment, a polyethylene has: a density of from about 0.91 g/cm3 to about 0.94 g/cm3; a value of Mz of about 1,500,000 g/mol or greater; and a ratio of Mz to Mw of about 7 or greater. A process includes introducing a first feed stream having ethylene monomer and a first free radical initiator to a first inlet of a first reaction zone, where the first reaction zone has a first inlet temperature. The process further includes introducing a second feed stream having ethylene monomer and a second free radical initiator to a second inlet of a second reaction zone, where the second reaction zone has a second inlet temperature that is the same or different than the first inlet temperature.Type: GrantFiled: April 6, 2021Date of Patent: June 20, 2023Assignee: ExxonMobil Chemical Patents Inc.Inventors: Haiqing Peng, Henri A. Lammens, Timothy S. McCracken, Arthur G. Voepel
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Publication number: 20230167354Abstract: Proppant particulates like sand are commonly used in hydraulic fracturing operations to maintain one or more fractures in an opened state following the release of hydraulic pressure. Fracturing fluids and methods of hydraulic fracturing may also use proppant particulates composed of high-flow polyolefin coated mineral particles (referred to as high-flow polyolefin coated mineral proppant particulates). In some instances, the high-flow polyolefin-coated mineral proppant particulates have a particle density of equal to or less than about 1.35 grams per cubic centimeter, and further may be prepared using a one-pot hot melt process.Type: ApplicationFiled: November 10, 2022Publication date: June 1, 2023Inventors: Dragan STOJKOVIC, Abdelhadi SAHNOUNE, Haiqing PENG, Lee J. HALL, Kendal K. DECKER
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Patent number: 11608396Abstract: Catalyst systems and methods for making and using the same are disclosed. A catalyst composition is provided that includes a catalyst compound supported to form a supported catalyst system, the catalyst compound including: where each of R1, R2, R3, R4, R5, R6, R7 and X are as discussed herein.Type: GrantFiled: March 15, 2021Date of Patent: March 21, 2023Assignee: Univation Technologies, LLCInventors: Donna J. Crowther, C. Jeff Harlan, Jackie Lovell, Haiqing Peng
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Patent number: 11518825Abstract: Embodiments of the present disclosure are directed towards catalyst formulations including a metallocene and a stearic compound selected from bis 2-hydroxyethyl stearyl amine, aluminum distearate, and combinations thereof, where the metallocene is represented by the following formula: (Formula (I)) wherein each n-PR is n-propyl, and each X is independently CH3, Cl, or F.Type: GrantFiled: March 4, 2019Date of Patent: December 6, 2022Assignee: Univation Technologies, LLCInventors: Wesley R. Mariott, John F. Szul, Haiqing Peng, James M. Farley, Bruce J. Savatsky, Brandon C. Locklear
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Patent number: 11479624Abstract: Provided herein are polyethylene compositions suitable in the fabrication of PE-RT pipes for use in cold and hot water plumbing in accordance with ISO 22391-2, and processes for making the same.Type: GrantFiled: October 12, 2018Date of Patent: October 25, 2022Assignee: ExxonMobil Chemical Patents Inc.Inventors: Donald A. Winesett, Haiqing Peng, Antonios K. Doufas
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Patent number: 11230614Abstract: Methods for reducing gels and/or dome sheeting in gas phase polymerization processes and their resulting products are provided. The polymerization processes include polymerizing ethylene and one or more optional comonomers in a fluidized bed reactor in the presence of a metallocene catalyst, hydrogen, and at least one condensing agent.Type: GrantFiled: December 13, 2017Date of Patent: January 25, 2022Assignee: ExxonMobil Chemical Patent Inc.Inventors: Brandon C. Locklear, Haiqing Peng, Bruce J. Savatsky, James M. Farley, Daniel P. Zilker, Robert O. Hagerty, Michael E. Muhle, Fathi D. Hussein
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Publication number: 20210324117Abstract: The present disclosure provides processes for producing polyethylene resins. In at least one embodiment, a polyethylene has: a density of from about 0.91 g/cm3 to about 0.94 g/cm3; a value of Mz of about 1,500,000 g/mol or greater; and a ratio of Mz to Mw of about 7 or greater. A process includes introducing a first feed stream having ethylene monomer and a first free radical initiator to a first inlet of a first reaction zone, where the first reaction zone has a first inlet temperature. The process further includes introducing a second feed stream having ethylene monomer and a second free radical initiator to a second inlet of a second reaction zone, where the second reaction zone has a second inlet temperature that is the same or different than the first inlet temperature.Type: ApplicationFiled: April 6, 2021Publication date: October 21, 2021Inventors: Haiqing PENG, Henri A. LAMMENS, Timothy S. MCCRACKEN, Arthur G. VOEPEL
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Publication number: 20210198391Abstract: Catalyst systems and methods for making and using the same are disclosed. A catalyst composition is provided that includes a catalyst compound supported to form a supported catalyst system, the catalyst compound including: where each of R1, R2, R3, R4, R5, R6, R7 and X are as discussed herein.Type: ApplicationFiled: March 15, 2021Publication date: July 1, 2021Applicant: Univation Technologies, LLCInventors: Donna J. Crowther, C. Jeff Harlan, Jackie Lovell, Haiqing Peng
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Publication number: 20210115168Abstract: Embodiments of the present disclosure are directed towards catalyst formulations including a metallocene and a stearic compound selected from bis 2-hydroxyethyl stearyl amine, aluminum distearate, and combinations thereof, where the metallocene is represented by the following formula: (Formula (I)) wherein each n-PR is n-propyl, and each X is independently CH3, Cl, or F.Type: ApplicationFiled: March 4, 2019Publication date: April 22, 2021Applicant: Univation Technologies, LLCInventors: Wesley R. MARIOTT, John F. SZUL, Haiqing PENG, James M. FARLEY, Bruce J. SAVATSKY, Brandon C. LOCKLEAR
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Patent number: 10975174Abstract: Catalyst systems and methods for making and using the same are disclosed. A catalyst composition is provided that includes a catalyst compound supported to form a supported catalyst system, the catalyst compound including: where each of R1, R2, R3, R4, R5, R6, R7 and X are as discussed herein.Type: GrantFiled: July 30, 2019Date of Patent: April 13, 2021Assignee: Univation Technologies, LLCInventors: Donna J. Crowther, C. Jeff Harlan, Jackie Lovell, Haiqing Peng
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Publication number: 20200339715Abstract: Provided herein are polyethylene compositions suitable in the fabrication of PE-RT pipes for use in cold and hot water plumbing in accordance with ISO 22391-2, and processes for making the same.Type: ApplicationFiled: October 12, 2018Publication date: October 29, 2020Inventors: Donald A. Winesett, Haiqing Peng, Antonios K. Doufas
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Publication number: 20200299431Abstract: In an embodiment, a pipe includes a polyethylene composition that includes ethylene and an alpha-olefin comonomer, wherein the polyethylene composition has a melt index of from 0.1 g/10 min to 1 g/10 min, a density of from 0.93 g/cm3 to 0.94 g/cm3, and a melt index ratio of from 40 to 70, and wherein the pipe has a 20° C. long term hydrostatic strength of from 5 MPa to 10.1 MPa. In another embodiment, a method of making a pipe includes extruding any polyethylene composition described herein. In another embodiment, an article includes a polyethylene composition described herein. In another embodiment, a polyethylene composition having a melt index of from 0.1 g/10 min to 1 g/10 min, a density of from 0.93 g/cm3 to 0.94 g/cm3, and a melt index ratio of from 40 to 70 is provided.Type: ApplicationFiled: June 5, 2020Publication date: September 24, 2020Inventors: Haiqing Peng, Donald A. Winesett, Yuan Mei, Roel Barzin
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Patent number: 10538604Abstract: Catalyst systems and methods for making and using the same are disclosed. A catalyst composition is provided that includes a catalyst compound supported to form a supported catalyst system, the catalyst compound including: where each of R1, R2, R3, R4, R5, R6, R7 and X are as discussed herein.Type: GrantFiled: April 14, 2016Date of Patent: January 21, 2020Assignee: Univation Technologies, LLCInventors: Donna J. Crowther, C. Jeff Harlan, Jackie Lovell, Haiqing Peng
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Publication number: 20200010585Abstract: Methods for reducing gels and/or dome sheeting in gas phase polymerization processes and their resulting products are provided. The polymerization processes include polymerizing ethylene and one or more optional comonomers in a fluidized bed reactor in the presence of a metallocene catalyst, hydrogen, and at least one condensing agent.Type: ApplicationFiled: December 13, 2017Publication date: January 9, 2020Inventors: Brandon C. Locklear, Haiqing Peng, Bruce J. Savatsky, James M. Farley, Daniel P. Zilker, Robert O. Hagerty, Michael E. Muhle, Fathi D. Hussein
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Publication number: 20190352436Abstract: Catalyst systems and methods for making and using the same are disclosed. A catalyst composition is provided that includes a catalyst compound supported to form a supported catalyst system, the catalyst compound including: where each of R1, R2, R3, R4, R5, R6, R7 and X are as discussed herein.Type: ApplicationFiled: July 30, 2019Publication date: November 21, 2019Applicant: Univation Technologies, LLCInventors: Donna J. Crowther, C. Jeff Harlan, Jackie Lovell, Haiqing Peng
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Publication number: 20180079838Abstract: Catalyst systems and methods for making and using the same are disclosed. A catalyst composition is provided that includes a catalyst compound supported to form a supported catalyst system, the catalyst compound including: where each of R1, R2, R3, R4, R5, R6, R7 and X are as discussed herein.Type: ApplicationFiled: April 14, 2016Publication date: March 22, 2018Applicant: Univation Technologies, LLCInventors: Donna J. Crowther, C. Jeff Harlan, Jackie Lovell, Haiqing Peng
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Patent number: 9902790Abstract: A method of polymerizing olefins is disclosed. The method comprises contacting ethylene and at least one comonomer with a catalyst system to produce a polyolefin polymer that is multimodal. The catalyst system comprises a first catalyst that promotes polymerization of the ethylene into a low molecular weight (LMW) portion of the polyolefin polymer and a second catalyst that promotes polymerization of the ethylene into a high molecular weight (HMW) portion of the polyolefin polymer. The first catalyst and at least a portion of the second catalyst are co-supported to form a commonly-supported catalyst system and at least a portion of the second catalyst is added as a catalyst trim feed to the catalyst system.Type: GrantFiled: February 10, 2015Date of Patent: February 27, 2018Assignee: Univation Technologies, LLCInventors: Daniel D. Vanderlende, C. Jeff Harlan, Haiqing Peng, Michael D. Awe, Roger L. Kuhlman, Ching-Tai Lue, Timothy R. Lynn, Wesley R. Mariott, Daniel P. Zilker, Jr.
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Publication number: 20170022309Abstract: A method of polymerizing olefins is disclosed. The method comprises contacting ethylene and at least one co-monomer with a catalyst system to produce a polyolefin polymer that is multimodal. The catalyst system comprises a first catalyst that promotes polymerization of the ethylene into a low molecular weight (LMW) portion of the polyolefin polymer and a second catalyst that promotes polymerization of the ethylene into a high molecular weight (HMW) portion of the polyolefin polymer. The first catalyst and at least a portion of the second catalyst are co-supported to form a commonly-supported catalyst system and at least a portion of the second catalyst is added as a catalyst trim feed to the catalyst system.Type: ApplicationFiled: February 10, 2015Publication date: January 26, 2017Applicant: Univation Technologies, LLCInventors: Daniel D. Vanderlende, C. Jeff Harlan, Haiqing Peng, Michael D. Awe, Roger L. Kuhlman, Ching-Tai Lue, Timothy R. Lynn, Wesley R. Mariott, Daniel P. Zilker, JR.