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公开(公告)号：US12037421B2
公开(公告)日：2024-07-16
申请号：US18357209
申请日：2023-07-24
发明人： Qing Yang , Ryan N. Rose , Max P. McDaniel , Zhihui Gu
IPC分类号： C08F4/6592 , C08F4/02 , C08F4/52 , C08F4/642 , C08F4/659 , C08F110/02 , C08F210/16
CPC分类号： C08F110/02 , C08F4/025 , C08F4/52 , C08F4/642 , C08F4/65912 , C08F4/65916 , C08F210/16 , C08F2410/07 , C08F2420/00
摘要： Methods for preparing metallocene-based catalyst compositions include the steps of contacting an alcohol compound and an organoaluminum compound for a first period of time to form a precontacted mixture, and contacting the precontacted mixture with an activator-support and a metallocene compound for a second period of time to form the catalyst composition. Such catalyst compositions can contain an activator-support, a metallocene compound, an organoaluminum compound, and a dialkyl aluminum alkoxide, and these catalyst compositions have increased catalytic activity for the polymerization of olefins.
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公开(公告)号：US12030975B2
公开(公告)日：2024-07-09
申请号：US17832932
申请日：2022-06-06
摘要： A pre-catalyst composition comprising: a) a silica support comprising silica wherein an amount of silica is in a range of from about 70 wt. % to about 95 wt. % based upon a total weight of the silica support; b) a titanium-containing compound wherein an amount of titanium is in a range of from about 0.1 wt. % to about 10 wt. % based upon the total weight of the silica support; c) a chromium-containing compound wherein an amount of chromium is in a range of from about 0.1 wt. % to about 10 wt. % based upon the total weight of the silica support; d) a surfactant wherein the surfactant comprises a non-ionic surfactant, a cationic surfactant, or a combination thereof; e) a carboxylate wherein the carboxylate comprises a multi carboxylate, an alpha-hydroxy carboxylate, or a combination thereof; and f) a solvent.
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公开(公告)号：US20240199768A1
公开(公告)日：2024-06-20
申请号：US18068887
申请日：2022-12-20
摘要： A technique of operating a gas phase fluidized bed polymerization reactor system may include feeding an olefin monomer and catalyst to a polymerization reactor. The monomer and the catalyst are contacted in a fluidized bed in the reactor to form a product including a polyolefin. A heat of polymerization is extracted from the reactor by recycling an inert condensable agent through the fluidized bed and condensing the inert condensable agent. The product is discharged from the reactor. The inert condensable agent includes propane, n-butane, or isobutane in a total mole fraction of greater than or equal to 0.50 of the inert condensable agent. A system including a gas phase fluidized bed polymerization reactor system may include a source of propane, n-butane, or isobutane for introduction into the polymerization system as an inert condensable agent. A loop slurry polymerization reactor system outlet may be the source of isobutane or propane.
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4.发明公开公开(公告)号：US20240109984A1
公开(公告)日：2024-04-04
申请号：US17767809
申请日：2020-10-09
发明人： Gursu Culcu , Alexander V. Zabula , David A. Cano
CPC分类号： C08F4/78 , C08F4/025 , C08F4/16 , C08F2410/04
摘要： The present disclosure relates to molybdenum and/or tungsten complexes, catalyst systems including molybdenum and/or tungsten complexes, and polymerization processes to produce polyalkenamers such as polypentenamers and polycyclooctenamers.
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公开(公告)号：US11926691B2
公开(公告)日：2024-03-12
申请号：US18312849
申请日：2023-05-05
IPC分类号： C08F4/02 , B82Y30/00 , C08F4/659 , C08F4/6592 , C08F10/02 , C08F210/16
CPC分类号： C08F4/65912 , C08F4/02 , C08F10/02 , B82Y30/00 , C08F210/16
摘要： A method of making a polyolefin nanocomposite including, mixing a zinc-aluminum layered double hydroxide (LDH), and a zirconocene complex in a non-polar solvent to form a first mixture. Prior to the mixing the zirconocene complex is not supported on the zinc-aluminum LDH. The method further includes sonicating the first mixture for at least one hour to form a homogeneous slurry. The method further includes degassing the homogenous slurry and adding at least one olefin gas to form a second mixture. The method further includes adding an aluminoxane catalyst to the second mixture and reacting for at least 10 minutes to form a reaction mixture including the polyolefin nanocomposite. The method further includes separating the polyolefin nanocomposite from the reaction mixture.
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公开(公告)号：US11885044B2
公开(公告)日：2024-01-30
申请号：US16643651
申请日：2018-12-17
申请人： LG Chem, Ltd.
发明人： Kyung Seop Noh , Seong Min Chae , Churl Young Park , Sangjin Jeon , Taejin Kim
IPC分类号： D01F6/06 , D04H1/4291 , C08F110/06 , D04H1/44 , D01D1/02 , D01D5/088 , C08F4/02
CPC分类号： D01F6/06 , C08F4/02 , C08F110/06 , D01D1/02 , D01D5/088 , D04H1/4291 , D04H1/44 , C08F2420/01 , D10B2321/022
摘要： The polypropylene nonwoven fabric produced by the method for producing a polypropylene nonwoven fabric according to the present invention has features that it has excellent stretchability and excellent water pressure resistance.
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公开(公告)号：US20230406965A1
公开(公告)日：2023-12-21
申请号：US18044188
申请日：2021-09-03
申请人： CHINA PETROLEUM & CHEMICAL CORPORATION , BEIJING RESEARCH INSTITUTE OF CHEMICAL INDUSTRY, CHINA PETROLEUM & CHEMICAL CORPORATION
发明人： Yongtai LING , Junling ZHOU , Xianzhi XIA , Yuexiang LIU , Weili LI , Tao LIU , Chunhong REN , Jin ZHAO , Futang GAO , Long CHEN , Yang TAN
CPC分类号： C08F4/022 , C08F2410/06 , C08F4/005
摘要： A spherical carrier for olefin polymerization catalysts has at least one magnesium-containing compound having a structure represented by formula (1). The spherical carrier has a relatively good particle morphology, and substantially no abnormally morphological particles will appear. A method for preparing the spherical carrier can be used to prepare a carrier having a small particle size and greatly expands the particle size range of the preparable carrier. When the catalyst prepared by using the carrier is used for olefin polymerization, polymerization activity is good, substantially no abnormally morphological material is present, and hydrogen response is good.
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公开(公告)号：US11827734B1
公开(公告)日：2023-11-28
申请号：US17941600
申请日：2022-09-09
IPC分类号： C08F4/02 , C08F4/6592 , C08F210/16 , C08F4/659 , C08F4/639
CPC分类号： C08F4/65912 , C08F4/63916 , C08F4/65927 , C08F210/16
摘要： A method of making a polyolefin including, mixing a layered double hydroxide (LDH), and a zirconocene complex in a non-polar solvent to form a first mixture. The method further includes degassing the first mixture and adding an olefin to form a second mixture. The method further includes adding an aluminoxane cocatalyst to the second mixture and reacting for at least 10 minutes to form a reaction mixture including the polyolefin. The method further includes separating the polyolefin from the reaction mixture. The polyolefin has a melting temperature of 120-130° C. The zirconocene complex is supported on the LDH to form a supported catalyst complex in the first mixture.
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公开(公告)号：US20230265221A1
公开(公告)日：2023-08-24
申请号：US18005175
申请日：2021-07-13
发明人： Liheng WU , Dick NAGAKI , Jun WANG , Kaiwalya SABNIS , Xianghua YU , Travis CONANT , Paulette HAZIN
摘要： Catalysts for the hydrogenation of aromatic containing polymers are described. Such a catalyst can include, based on the total weight of the catalyst, 99.1 wt. % to 99.95 wt. % of a metal oxide support, and 0.05 wt. % to 0.9 wt. % of catalytic metal nanoparticles comprising platinum (Pt), palladium (Pd), ruthenium (Ru), any combination thereof, or alloy thereof. The catalyst can have a specific surface area of 5 m2/g to 80 m2/g, a pore volume of 0.01 cm3/g to 0.35 cm3/g, and a catalyst median particle size of less than 300 microns. Processes to produce the catalyst and methods of hydrogenating aromatic containing polymers are also described.
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公开(公告)号：US11732067B2
公开(公告)日：2023-08-22
申请号：US16624614
申请日：2018-04-11
IPC分类号： C08F110/06 , C08F4/02 , C08F10/06
CPC分类号： C08F110/06 , C08F4/022 , C08F10/06
摘要： Disclosed is a polypropylene with an MFR of at least 20 g/10 min comprising a homopolypropylene and optionally within a range from 2 wt % to 30 wt % of an propylene-α-olefin copolymer by weight of the polypropylene; wherein the homopolypropylene has a MFR within a range from 30 g/10 min to 200 g/10 min, an Mw/Mn within a range from 7 to 16, and comprising 1.1 wt % or less atactic polypropylene based on the total weight of the homopolypropylene and atactic polypropylene, where the propylene-α-olefin copolymer has within a range from 30 wt % to 50 wt % α-olefin derived units by weight of the propylene-α-olefin copolymer, and an intrinsic viscosity within a range from 4 to 8 dL/g. The impact copolymer may be obtained by combining a Ziegler-Natta catalyst having at least two different internal electron donors with propylene in reactors in series to produce the homopolypropylene followed by a gas phase reactor to produce a propylene-α-olefin copolymer.
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