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11.发明申请公开(公告)号：US20220227903A1
公开(公告)日：2022-07-21
申请号：US17614684
申请日：2020-05-28
发明人： Peter Rohrbach , Jürgen Perzlmeier , Mudit Ashtana , Harald Prang , Elke Damm
IPC分类号： C08F210/16 , C08F2/01 , C08F2/18 , C08F210/08
摘要： A process for preparing an ethylene polymer in a suspension polymerization including the steps of separating the formed suspension of ethylene polymer particles in a solid-liquid separator into wet ethylene polymer particles and mother liquor, drying the wet ethylene polymer particles by a gas stream and forming a gas stream carrying a hydrocarbon load, and thereafter separating the hydrocarbon load from the gas stream and thereby forming a liquid hydrocarbon recover stream, transferring a part of the mother liquor into a work-up section including an evaporator for producing a wax-depleted portion of the mother liquor and a diluent distillation unit for producing isolated diluent from the wax-depleted portion of the mother liquor, wherein a first part of the hydrocarbon recover stream is transferred to the diluent distillation unit without passing the evaporator for producing the wax-depleted portion of the mother liquor.
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公开(公告)号：US20210395490A1
公开(公告)日：2021-12-23
申请号：US17284745
申请日：2019-10-10
发明人： SHAHRAM MIHAN , ROLF MUELHAUPT , FAN ZHONG
摘要： A polyolefin composition made from or containing (a) a polyolefin and (b) a gibbsite nano platelet treated with a compound of formula (ORa)3Si—Rb or of formula Rc—COOH wherein Ra is a C1-C10 alkyl radical; Rb is a C5-C30 alkyl radical and Rc is a C5-C30 hydrocarbon radical.
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公开(公告)号：US20210148633A1
公开(公告)日：2021-05-20
申请号：US16623579
申请日：2018-06-21
发明人： Giulia Mei , Juergen Mohrbutter , Dieter Littmann , Christoph Wolf , Andre-Armand Finette , Michael Deuerling , Giuseppe Penzo
摘要： Method for the preparation of dried polymer pellets in a facility having a dryer with a first chamber and a mechanical agitator, and the facility further having a degassing silo with a second chamber, the method includes the steps of guiding a drying gas flow made from or containing a first gas mixture for drying wet polymer pellets into the first chamber, transferring the dried polymer pellets into the second chamber, guiding a second gas mixture for degassing the dried polymer pellets into the second chamber thereby transforming the second gas mixture into a third gas mixture and guiding a portion of the third gas mixture into the first chamber; and process for manufacturing LDPE pellets.
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14.发明申请公开(公告)号：US20210102009A1
公开(公告)日：2021-04-08
申请号：US16635459
申请日：2018-08-02
发明人： Gabriele Mei , Giulia Mei , Giuseppe Penzo
摘要： A process for preparing an olefin polymer, including the steps of forming a particulate olefin polymer in a gas-phase polymerization reactor in the presence of a C3-C5 alkane as polymerization diluent, separating discharged polyolefin particles from concomitantly discharged gas at a pressure from 1 to 2.2 MPa, degassing the polyolefin particles at a pressure from 0.1 to 0.4 MPa with a gas made from or containing a C3-C5 alkane; and transferring the separated gas and the gas from the degassing to a work-up unit operated at a pressure from 0.001 to 0.2 MPa below the pressure of the separation, wherein the gas for degassing is continuously received from the work-up unit.
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公开(公告)号：US10702896B2
公开(公告)日：2020-07-07
申请号：US15868701
申请日：2018-01-11
发明人： Antonio Ling
IPC分类号： B08B9/027 , C08F10/02 , G01N27/04 , C07C4/04 , C23G5/00 , G01R1/067 , C08F10/06 , F28G9/00 , B08B3/02
摘要： A method for cleaning a metal surface of a metal component of an industrial plant is disclosed comprising measuring the electrical resistance RA1 of a metal component over a cleaned area of the metal surface with a resistance meter, comparing the electrical resistance RA1 measured with a pre-determined electrical resistance value RDET, assessing whether RA1 is greater, smaller or equal to RDET, and repeating cleaning if the electrical resistance RA1 measured is greater than RDET, or terminating cleaning of the surface area of the metal component if RA1 is smaller than or identical to RDET.
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公开(公告)号：US10570277B2
公开(公告)日：2020-02-25
申请号：US16463790
申请日：2017-10-30
发明人： Diana Doetsch , Bernd Lothar Marczinke , Gerhardus Meier , Ulf Schueller , Elke Damm , Claudio Fibla
摘要： A polyethylene composition for producing blow-molded hollow articles, having the following features: 1) density from greater than 0.952 to 0.957 g/cm3, determined according to ISO 1183-1 at 23° C.; 2) ratio MIF/MIP from 12 to 25; 3) MIF from 18 to 40 g/10 min.; 4) η0.02 from 30,000 to 55,000 Pa·s; 5) long-chain branching index, LCBI, equal to or greater than 0.55; 6) ratio (η0.02/1000)/LCBI from 55 to 75.
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公开(公告)号：US10472428B2
公开(公告)日：2019-11-12
申请号：US16300177
申请日：2017-05-09
摘要： A process for polymerizing or copolymerizing ethylenically unsaturated monomers at pressures in the range of from 110 MPa to 500 MPa in a production line comprising a continuously operated polymerization reactor which is installed within a protective enclosure, wherein the production line is monitored with respect to an occurrence of a leakage of monomers or of reaction mixture and a water based deluge system, which provides droplets of a diameter in a range from 25 μm to 20 mm to the enclosed area, is automatically started with a minimum flow rate of 10 L/min per m2 of enclosed area when a leakage of monomers or of reaction mixture is detected.
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公开(公告)号：US20190339007A1
公开(公告)日：2019-11-07
申请号：US16076198
申请日：2017-02-14
IPC分类号： F26B3/084 , B01J8/00 , B01J8/26 , B01J8/18 , B01J8/36 , F26B21/14 , C08F6/24 , C08F6/00 , C08F10/02
摘要： A method for preparing a dried powder is provided. The facility includes a first drying chamber having a heating element and a second drying chamber. A mixture of powder and diluent is introduced into the first drying chamber. A pre-dried powder is transferred from the first drying chamber into the second drying chamber. A dried powder, including a recirculated amount of powder and a discharge amount of powder, is formed in the second drying chamber. The recirculated amount of the dried powder is transferred by a conveyor device from the second drying chamber into the first drying chamber. The discharge amount of the dried powder is discharged from the second drying chamber.
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19.发明申请公开(公告)号：US20190322775A1
公开(公告)日：2019-10-24
申请号：US16348636
申请日：2017-11-09
发明人： Gerhardus Meier , Ulf Schueller , Gabriele Mei , Massimo Covezzi , Pietro Baita , Lorella Marturano
摘要： A process for preparing an ethylene polymer including the step of homopolymerizing ethylene or copolymerizing ethylene with one or more comonomers in a gas-phase polymerization reactor including a riser unit wherein growing polymer particles flow upwards under fluidization, fast fluidization or transport conditions and a downcomer wherein growing polymer particles flow downward in a densified form, wherein the hold-up of polymer particles in the downcomer is from 55 wt. % to 80 wt. % of the total hold-up of polymer particles in the gas-phase polymerization reactor.
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20.发明授权公开(公告)号：US10343135B1
公开(公告)日：2019-07-09
申请号：US16144627
申请日：2018-09-27
发明人： Dieter Littmann , Andre-Armand Finette , Christoph Wolf , Michael Deuerling , Juergen Peter Mohrbutter , Danir Khayrullin
IPC分类号： C08F210/02 , C08F210/16 , F16L3/23 , B01J19/24 , F16L43/00
摘要： The present disclosure relates to a manufacturing plant for high-pressure polymerization having a layered tubular reactor and a method for an emergency shutdown in said manufacturing plant. The present disclosure also relates to a process for manufacturing LDPE using said layered tubular reactor.
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