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公开(公告)号：US12152095B2
公开(公告)日：2024-11-26
申请号：US17310700
申请日：2020-03-04
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Bruce J. Savatsky , Brian R. Greenhalgh , Joseph A. Moebus , Aaron C. McGinnis , Ryan W. Impelman , Anne A. Bernard-Brunel
IPC: C08F210/16 , B01J8/18 , B01J19/00 , B01J19/24 , C08F2/34 , C08F10/02 , C08F110/02 , C08F210/06 , C08F210/08
Abstract: The present disclosure relates to processes for production of polyolefins from olefin monomer(s) in a gas phase reactor using condensing agent(s) (CAs), and in particular relates to controlling condensed phase cooling in a gas phase reactor used to polymerize olefin monomer(s). The method may include introducing first and second condensing agent(s) into the reactor at ratio(s) determined by ascertaining a stick limit for the first condensing agent, calculating an equivalence factor relating the first and second condensing agents, ascertaining total allowable condensing agent, and calculating amount of the first condensing agent removed and replaced by the second condensing agent. The method may further include calculating the dew point limit of a gas phase composition including olefin monomer(s) as well as the first and second condensing agents; and determining if introducing a mixture comprising the olefin monomer(s) and the condensing agent composition would exceed the calculated dew point limit.
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公开(公告)号：US11092395B2
公开(公告)日：2021-08-17
申请号：US16764286
申请日：2018-10-17
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Brian R. Greenhalgh , Ronnie D. Bryant , Allison C. Buenemann , Benjamin C. Duff , Philip M. Duvall , Joseph A. Moebus
Abstract: Methods of online cleaning of heat exchangers at elevated temperatures are provided. Cleaning of the heat exchanger is achieved through an increasing heat exchanger effluent temperature of a polymer solution together with operating under optimized process conditions provided by a phase diagram constructed for the polymer solution. The separation of polymer from unreacted monomers and solvent in the polymer solution is carried out by raising the temperature of the polymer solution as reactor effluent flowing through the heat exchanger. Then, subsequently and by reducing pressure of the heat exchanger effluent, the polymer solution separates into two liquid phases.
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Patent Agency Ranking
公开(公告)号：US20200370849A1
公开(公告)日：2020-11-26
申请号：US16764286
申请日：2018-10-17
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Brian R. Greenhalgh , Ronnie D. Bryant , Allison C. Buenemann , Benjamin C. Duff , Philip M. Duvall , Joseph A. Moebus
Abstract: Methods of online cleaning of heat exchangers at elevated temperatures are provided. Cleaning of the heat exchanger is achieved through an increasing heat exchanger effluent temperature of a polymer solution together with operating under optimized process conditions provided by a phase diagram constructed for the polymer solution. The separation of polymer from unreacted monomers and solvent in the polymer solution is carried out by raising the temperature of the polymer solution as reactor effluent flowing through the heat exchanger. Then, subsequently and by reducing pressure of the heat exchanger effluent, the polymer solution separates into two liquid phases.
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公开(公告)号：US12202917B2
公开(公告)日：2025-01-21
申请号：US17310699
申请日：2020-03-04
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Bruce J. Savatsky , Brian R. Greenhalgh , Joseph A. Moebus , Aaron C. McGinnis , Ryan W. Impelman , Anne A. Bernard-Brunel
IPC: C08F2/34
Abstract: This disclosure relates to processes for producing polyolefins in a gas phase reactor using condensing agent(s) (CAs), and real-time calculation of the ratio of one type of CA to another CA within a CA composition. This disclosure provides methods for controlling condensed phase cooling in a gas phase reactor used to polymerize olefins. The polymerization may employ one or more polymerization catalysts to polymerize one or more olefin monomers, and may include introducing a first condensing agent and a second condensing agent in a ratio of first condensing agent to second condensing agent, which ratio is calculated by ascertaining a stick limit for a first condensing agent, calculating an equivalence factor relating the first condensing agent and a second condensing agent, ascertaining a total allowable condensing agent, and calculating a first amount of the first condensing agent removed and replaced by a second amount of the second condensing agent.
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公开(公告)号：US20200172715A1
公开(公告)日：2020-06-04
申请号：US16692831
申请日：2019-11-22
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Nino Ruocco , David M. Fiscus , Summer J. Bernhardt , Bethany M. Welke , Joseph A. Throckmorton , Joseph A. Moebus , Tamara L. Blanton , Kimari T. M. Slaughter
Abstract: This invention relates to blend, and films thereof, comprising: 1) semicrystalline cyclic olefin copolymer comprising less than 15 wt % of a C5-C40 cyclic olefin comonomer and greater than 85 wt % of a C2-C40 linear and/or branched olefin monomer content having a density of about 0.92 g/cm3 to about 0.94 g/cm3, modulus less than 20-80 kpsi, an elongation at break of 150-500%, and a glass transition temperatures less than 38° C.; 2) an amorphous cyclic olefin copolymer comprising more than 25 wt % of a C5-C40 cyclic olefin comonomer and less than 75 wt % of a C2-C40 linear and/or branched olefin monomer having a density greater than 1.0 g/cm3, a modulus of 260-380 kpsi, an elongation at break of
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公开(公告)号：US20230174757A1
公开(公告)日：2023-06-08
申请号：US17997119
申请日：2021-04-27
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Ru Xie , Matthew W. Holtcamp , David M. Fiscus , Dongming Li , Laughlin G. McCullough , Matthew S. Bedoya , Kevin A. Steven , Yan Jiang , Joseph A. Moebus
IPC: C08L23/08 , C08F2/34 , C08F210/16 , C08F4/6592 , C08F4/70 , C08J5/18
CPC classification number: C08L23/0815 , C08F2/34 , C08F210/16 , C08F4/65925 , C08F4/7042 , C08J5/18 , C08F2500/27 , C08F2500/31 , C08F2500/38 , C08L2203/16 , C08L2207/066 , C08L2314/06 , C08L2314/08 , C08J2323/08
Abstract: The present disclosure generally relates to catalyst systems, polyethylene compositions, and uses of such compositions in, e.g., films. In an embodiment is provided a film that includes a polyethylene composition, comprising: ethylene and a C3-C40 olefin comonomer, the polyethylene composition having at least 75 wt % ethylene content and from 0 wt % to 25 wt % of a C3-C40 olefin comonomer content based upon the total weight of the composition as determined by GPC-IR5-LS-VIS, the film having: an average of MD and TD 1% secant modulus of 42,000 psi or greater as determined by ASTM D-882, and a Dart Drop Impact of greater than 400 g/mil, as determined by ASTM D1709. In another embodiment is provided a process for producing a polyethylene composition, comprising: introducing, under first polymerization conditions, ethylene and a C3-C40 alpha-olefin to a catalyst system in a reactor, the catalyst system comprising a first catalyst compound, a second catalyst compound, and an activator; and forming a polyethylene composition.
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公开(公告)号：US20230167254A1
公开(公告)日：2023-06-01
申请号：US17997113
申请日：2021-04-23
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Ru Xie , Mattew W. Holtcamp , David M. Fiscus , Dongming Li , Laughlin G. McCullough , Matthew S. Bedoya , Kevin A. Stevens , Yan Jiang , Joseph A. Moebus
IPC: C08J5/18 , C08F210/02
CPC classification number: C08J5/18 , C08F210/02 , C08J2323/08
Abstract: The present disclosure generally relates to catalyst systems, polyethylene compositions, and uses of such compositions in, e.g., films. In an embodiment is provided a film that includes a polyethylene composition, comprising: ethylene and a C3-C40 olefin comonomer, the polyethylene composition having at least 65 wt % ethylene content and from 0 wt % to 35 wt % of a C3-C40 olefin comonomer content based upon the total weight of the composition, the film having: an average of MD and TD 1% secant modulus of 43,000 psi or greater, and a Dart Drop Impact Strength of greater than 500 g/mil. In another embodiment is provided a process for producing a polyethylene composition that includes introducing ethylene and a C3-C40 alpha-olefin to a catalyst system, the catalyst system comprising a first catalyst compound, a second catalyst compound, and an activator; and forming a polyethylene composition.
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