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21. 发明授权

US11525041B2 Process for producing polymers 有权
公开(公告)号：US11525041B2
公开(公告)日：2022-12-13
申请号：US16406119
申请日：2019-05-08
申请人： ExxonMobil Chemical Patents Inc.
发明人： Jay L. Reimers , Yifeng Hong , Anthony J. Dias , John R. Hagadorn
IPC分类号： B29B9/06 , C08J3/14 , C08F210/16
摘要： A process for the synthesis of a granular polymer, the process comprising (a) providing an active polymerization mixture that includes polymer, monomer, catalyst and optional solvent; (b) introducing a hydroxy-containing diaryl acetyl compound to the active polymerization mixture to thereby provide an inactive polymer mixture; (c) separating the polymer solution into a first stream and a second stream, where the first stream includes the polymer and the hydroxy-containing diaryl acetyl compound, and the second stream includes the monomer and the optional solvent; and (d) fabricating granules from the first stream.

22. 发明授权

US11142593B2 Lecithin quenching agent 有权
公开(公告)号：US11142593B2
公开(公告)日：2021-10-12
申请号：US16260518
申请日：2019-01-29
申请人： ExxonMobil Chemical Patents Inc.
发明人： Jay L. Reimers , Yifeng Hong , John R. Hagadorn
IPC分类号： C08F10/02 , C08F10/06 , C08F2/42 , C08F6/12 , C08K5/521 , C08F6/02 , C08F6/10 , C08F6/00 , C08F4/64
摘要： This disclosure describes polymerization processes and processes for quenching polymerization reactions using reactive particulates, such as lecithin, as quenching agents, typically in solution or bulk polymerization processes.

23. 发明授权

US10544246B2 Methods for supplying solid catalysts to a solution polymerization reactor 有权
公开(公告)号：US10544246B2
公开(公告)日：2020-01-28
申请号：US15645334
申请日：2017-07-10
申请人： ExxonMobil Chemical Patents Inc.
发明人： Peijun Jiang , Robert T. Li , Jay L. Reimers
IPC分类号： C08F210/16 , C08F210/06 , B01J8/20 , B01J19/06 , B01J8/08
摘要： Disclosed is a solution polymerization process, or, alternatively, a method of delivering powder catalysts to a solution polymerization reactor, comprising combining a homogeneous single-site catalyst precursor with α-olefin monomers to form a polyolefin, wherein the homogeneous single-site catalyst precursor is in the form of (i) a dry powder, (ii) suspended in a aliphatic hydrocarbon solvent, or (iii) suspended in an oil or wax, wherein the homogeneous single-site catalyst precursor is at a concentration greater than 0.8 mmole/liter when suspended in the aliphatic hydrocarbon solvent prior to entering the solution polymerization reactor.

24. 发明申请

US20160362506A1 Process for Continuous Solution Polymerization 有权
标题翻译：连续溶液聚合方法
公开(公告)号：US20160362506A1
公开(公告)日：2016-12-15
申请号：US15144493
申请日：2016-05-02
申请人： ExxonMobil Chemical Patents Inc.
发明人： Quintin P. W. Costin , Philip M. Duvall , Jay L. Reimers
IPC分类号： C08F2/04 , C08F6/10
CPC分类号： C08F2/04 , C08F6/003 , C08F6/12 , C08F210/16 , C08F210/18 , C08F2400/02 , C08F210/06 , C08F236/20 , C08F2/00
摘要： Described herein are methods for continuous solution polymerization. The method may comprise polymerizing one or more monomers and comonomers in the presence of a solvent in a polymerization reactor to produce a polymer solution; determining the composition of the polymer solution exiting the polymerization reactor in an on-line fashion; determining at least one of the critical pressure or critical temperature; comparing the critical pressure and/or critical temperature to the actual temperature of the polymer solution and the actual pressure of the polymer solution; heating or cooling the polymer solution to a temperature within 50° C. of the critical temperature; and passing the polymer solution through a pressure letdown valve into a liquid-liquid separator, where the pressure of the polymer solution is reduced or raised to a pressure within 50 psig of the critical pressure to induce a separation of the polymer solution into two liquid phases.
摘要翻译：这里描述的是连续溶液聚合的方法。该方法可以包括在溶剂存在下在聚合反应器中聚合一种或多种单体和共聚单体以产生聚合物溶液; 以在线方式测定离开聚合反应器的聚合物溶液的组成; 确定临界压力或临界温度中的至少一个; 将临界压力和/或临界温度与聚合物溶液的实际温度和聚合物溶液的实际压力进行比较; 将聚合物溶液加热或冷却至临界温度的50℃以内的温度; 并将聚合物溶液通过压力降压阀进入液 - 液分离器，其中聚合物溶液的压力降低或升高到临界压力的50psig以内的压力，以引起聚合物溶液分离成两个液相。

25. 发明授权

US09389161B2 On-line FT-NIR method to determine particle size and distribution 有权
标题翻译：在线FT-NIR方法确定粒径和分布
公开(公告)号：US09389161B2
公开(公告)日：2016-07-12
申请号：US14639258
申请日：2015-03-05
申请人： ExxonMobil Chemical Patents Inc.
发明人： Jay L. Reimers
IPC分类号： G01N21/35 , G01J3/44 , G01J3/45 , G01N15/02
CPC分类号： G01N15/0205 , G01J3/45 , G01N21/35
摘要： This invention relates to a method for the determination of the average particle size or particle size distribution of a material in a gas phase reactor comprising: 1) analyzing the average particle size and particle size distribution of a baseline composition using the method described in ASTM D1921; 2) analyzing the average particle size and particle size distribution of said baseline composition using an FT-NIR analysis technique; 3) preparing a calibration matrix by comparing results from said reference analytical technique to the results from said FT-NIR analysis technique; 4) analyzing the material using an FT-NIR technique; and 5) identifying and quantifying the type and content of particles present in the material by comparing spectral data obtained from said FT-NIR technique of the material to said calibration matrix.This invention also relates to a process for determining polymer properties in a polymerization reactor system using such techniques.
摘要翻译：本发明涉及用于确定气相反应器中材料的平均粒度或粒度分布的方法，包括：1）使用ASTM D1921中描述的方法分析基准组合物的平均粒度和粒度分布 ; 2）使用FT-NIR分析技术分析所述基线组合物的平均粒度和粒度分布; 3）通过比较所述参考分析技术的结果与所述FT-NIR分析技术的结果来制备校准矩阵; 4）使用FT-NIR技术分析材料; 以及5）通过将从所述材料的所述FT-NIR技术获得的光谱数据与所述校准矩阵进行比较来识别和定量存在于所述材料中的颗粒的类型和含量。本发明还涉及使用这种技术在聚合反应器系统中测定聚合物性质的方法。

26. 发明授权

US09068033B2 Branched polyethylene with improved processing and high tear films made therefrom 有权
标题翻译：具有改进加工性能的分支聚乙烯和由其制成的高撕裂膜
公开(公告)号：US09068033B2
公开(公告)日：2015-06-30
申请号：US14091105
申请日：2013-11-26
申请人： ExxonMobil Chemical Patents Inc.
发明人： David M. Fiscus , Laughlin G. McCullough , John F. Walzer, Jr. , Jay L. Reimers
IPC分类号： C08F210/16 , C08L23/16 , C08F4/76 , C08L23/08 , C08F4/659
CPC分类号： C08F210/16 , C07F17/00 , C08F4/65912 , C08F4/65916 , C08F4/65927 , C08F4/76 , C08F10/00 , C08L23/0815 , C08L23/04 , C08F210/14 , C08F2500/08 , C08F2500/12 , C08F2500/05 , C08F2500/17
摘要： This invention relates to inventive ethylene-based copolymers comprising 75.0 wt % to 99.5 wt % of ethylene-derived units and 0.5 wt % to 25.0 wt % of C3 to C20 olefin derived units; the inventive ethylene-based copolymer having: a density in the range of from 0.900 to less than 0.940 g/cm3; a g′(vis) of less than 0.80; a melt index, I2, of from 0.25 to 1.5 g/10 min.; a Mw/Mn within a range from 3.0 to 6.0, and Mz/Mn greater than 8.0; and an absence of a local minimum loss angle at a complex modulus, G*, of 1.00×104 to 3.00×104 Pa.
摘要翻译：本发明涉及包含75.0wt％至99.5wt％的乙烯衍生单元和0.5wt％至25.0wt％的C3至C20烯烃衍生单元的本发明的乙烯基共聚物。本发明的乙烯基共聚物具有：在0.900至小于0.940g / cm3范围内的密度; g'（vis）小于0.80; 熔体指数I2为0.25至1.5g / 10min。在3.0至6.0的范围内的Mw / Mn和大于8.0的Mz / Mn; 并且在复数模量G *下不存在1.00×104〜3.00×104Pa的局部最小损耗角。

27. 发明授权

US11945888B2 Solution polymerization process and product control using effluent density 有权
公开(公告)号：US11945888B2
公开(公告)日：2024-04-02
申请号：US16847736
申请日：2020-04-14
申请人： ExxonMobil Chemical Patents Inc.
发明人： Yifeng Hong , Jay L. Reimers
IPC分类号： C08F210/16 , B01J19/00 , B01J19/06 , B01J19/18 , C08F2/04
CPC分类号： C08F210/16 , B01J19/0066 , B01J19/06 , B01J19/1875
摘要： A method for monitoring polymerization processes can include reacting by polymerization a feedstock in the presence of a catalyst in a reactor to produce an effluent comprising a polymer and a solvent; measuring a density of the effluent; and calculating a monomer conversion rate and/or a polymerization rate for the polymerization based on the density of the effluent. A system for monitoring polymerization processes can include a reactor containing an effluent comprising a solvent, a polymer, and a monomer; a flash vessel fluidly coupled to the reactor to receive the effluent from the reactor; and an inline density meter fluidly coupled to the reactor, placed between the reactor and the flash vessel, and configured to measure a density of the effluent.

28. 发明授权

US11492427B2 Production of gradient copolymers using monomer and comonomer concentration gradients in a loop reactor 有权
公开(公告)号：US11492427B2
公开(公告)日：2022-11-08
申请号：US17064109
申请日：2020-10-06
申请人： ExxonMobil Chemical Patents Inc.
发明人： Yifeng Hong , Shanshan Zhang , Jay L. Reimers
IPC分类号： C08F210/06 , C08F210/02
摘要： A method for producing gradient copolymers can include polymerizing a reaction mixture comprising a monomer and a comonomer in the presence of a metallocene catalyst in a loop reactor, wherein in the loop reactor a gradient monomer weight percent in the reaction mixture is about 3 wt % to about 50 wt %, thereby forming a gradient copolymer.

29. 发明授权

US11434309B2 Controlling molecular weight distribution and chemical composition distribution of a polyolefin product 有权
公开(公告)号：US11434309B2
公开(公告)日：2022-09-06
申请号：US16828258
申请日：2020-03-24
申请人： ExxonMobil Chemical Patents Inc.
发明人： Yifeng Hong , Jay L. Reimers , Jun Shi
IPC分类号： C08F2/04 , C08F2/12 , C08F210/08 , C08F210/14 , C08F2/01 , C08F210/02 , C08F4/42 , C08F210/06
摘要： A method broadening a molecular weight distribution and/or broadening a chemical composition distribution of the polyolefin product can include: polymerizing a feedstock in the presence of a metallocene catalyst in a loop reactor to produce a polyolefin product, the feedstock comprising two or more monomers; and adjusting a polymerization parameter selected from the group consisting of decreasing a recycle ratio, increasing a polymer concentration, increasing a LRSU number, and any combination thereof.

30. 发明申请

US20210277154A1 Silica Quenching Agents for use in Polymerization Process 有权
公开(公告)号：US20210277154A1
公开(公告)日：2021-09-09
申请号：US17328262
申请日：2021-05-24
申请人： ExxonMobil Chemical Patents Inc.
发明人： Jay L. Reimers , Yifeng Hong , John R. Hagadorn
IPC分类号： C08F10/02 , C08F10/06 , C08F2/42 , C08K3/36 , C08K9/06 , C08F6/10 , C08F6/02 , C08F6/00
摘要： This disclosure describes polymerization processes and processes for quenching polymerization reactions using reactive particulates, such as amorphous silica, as quenching agents, typically in solution or bulk polymerization processes.

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