公开(公告)号：US20190055328A1

公开(公告)日：2019-02-21

申请号：US16079229

申请日：2017-02-23

Applicant: Basell Polyolefine GmbH

Inventor： Gerhardus Meier ,  Ulf Schueller ,  Claudio Fibla ,  Shahram Mihan

IPC: C08F10/02

Abstract: A process for the preparation of an ethylene polymer including the step of polymerizing ethylene or copolymerizing ethylene and one or more other olefins in the presence of a Phillips-type chromium catalyst in a gas-phase polymerization reactor containing a reactor bed of particulate polymer, wherein the gas-phase polymerization reactor is equipped with a cycle gas line, wherein the reactor gas returned to the polymerization reactor through the cycle gas line has been condensed in part and the amount of liquid in the returned reactor gas is from 0.5 wt. % to 10 wt. % based upon the total weight of the reactor gas/liquid composition, the polymerization is carried out at from 108° C. to 125° C., and an aluminum alkyl is fed into the polymerization reactor in an amount in the range of from 0.0025 mole to 0.1 mole per ton of dosed ethylene.

公开(公告)号：US10160848B2

公开(公告)日：2018-12-25

申请号：US15778974

申请日：2016-11-08

Applicant: BASELL POLYOLEFINE GmbH

Inventor： Claudio Cavalieri ,  Michele Grazzi

IPC: C08L23/08 ,  C08J5/18

Abstract: A polyolefin composition made from or containing: A) from 55 to 75 wt % of a polyethylene having a density of 0.920 to 0.940 g/cm3 and a fraction soluble in xylene (XSA) of less than 10%, based upon the weight of the polyethylene; B) from 25 to 45 wt. % of a copolymer of ethylene with one or more comonomers selected from α-olefins having formula HC2═CHRI, where RI is an alkyl radical, linear or branched, having from 1 to 8 carbon atoms, made from or containing from 50 to 70 wt. %, based upon the weight of the copolymer of ethylene, of ethylene and having a fraction soluble in xylene (XSB) of at least about 50 wt. %, based upon the weight of the copolymer of ethylene; the polyolefin composition having a flexural modulus of less than 260 MPa as measured according to ISO 178. The polyolefin composition is useful for producing geomembranes.

公开(公告)号：US20180202971A1

公开(公告)日：2018-07-19

申请号：US15743603

申请日：2016-07-12

Applicant: Basell Polyolefine GmbH

Inventor： Antonio Ling

IPC: G01N27/80 ,  G01N17/00 ,  G01N33/20 ,  G01R33/12 ,  C10G9/20

CPC classification number: G01N27/80 ,  C10G9/20 ,  G01N17/006 ,  G01N33/20 ,  G01R33/12

Abstract: Methods of detecting carburization, nitriding or chromium depletion in a non- or weakly ferromagnetic test object using a permanent magnet having a magnet pull force equal to or greater than about 75N and measuring either the adhesive force to detach the magnet from the test object or the attractive force in which the magnet is being pulled towards the surface of the test object.

公开(公告)号：US20180179367A1

公开(公告)日：2018-06-28

申请号：US15739652

申请日：2016-06-06

Applicant: Basell Polyolefine GmbH

Inventor： Iakovos Vittorias ,  Gerhardus Meier ,  Ulf Schüller ,  Andreas Maus ,  Jens Wiesecke ,  Harrilaos Mavridis

IPC: C08L23/06 ,  C08L23/08

Abstract: A polyethylene composition having the following features: 1) density from about 0.945 to about 0.958 g/cm3, determined according to ISO 1183 at 23° C.; 2) ratio MIF/MIP from about 20 to about 43; 3) MIF from about 4.0 to less than about 8.5 g/10 min.; 4) HMWcopo index from about 3.5 to about 20; and 5) long-chain branching index, LCBI, equal to or lower than about 0.82. The polyethylene composition can be used to produce blown films.

公开(公告)号：US20180079842A1

公开(公告)日：2018-03-22

申请号：US15559792

申请日：2016-03-23

Applicant: Basell Polyolefine GmbH

Inventor： Volker Fraaije ,  Michael Lynch ,  Shahram Mihan ,  Gerhardus Meier ,  Ulf Schueller

IPC: C08F10/02

CPC classification number: C08F10/02 ,  C08F2500/07 ,  C08F210/16 ,  C08F2/005 ,  C08F2/007 ,  C08F210/14 ,  C08F2500/12 ,  C08F2500/13 ,  C08F2500/14 ,  C08F2500/26 ,  C08F4/24

Abstract: The present disclosure relates to a continuous process for the preparation of ethylene homopolymers or ethylene copolymers comprising polymerizing ethylene or copolymerizing ethylene and one or more other olefins in the presence of a chromium catalyst in a gas-phase polymerization reactor which is equipped with a cycle gas line for withdrawing reactor gas from the reactor, leading the reactor gas through a heat-exchanger for cooling and feeding the reactor gas back to the reactor, wherein the polymerization is carried out at a temperature from 30° C. to 130° C. and a pressure of from 0.1 to 10 MPa and an aliphatic carboxylic acid ester having from 8 to 24 carbon atoms is added.

公开(公告)号：US20180072876A1

公开(公告)日：2018-03-15

申请号：US15560424

申请日：2016-03-23

Applicant: Basell Polyolefine GmbH

Inventor： Gerd Mannebach ,  Bernd Lothar Marczinke ,  Gerhardus Meier ,  Ulf Schueller ,  Shahram Mihan ,  Andreas Maus ,  Pietro Baita ,  Maria Di Diego ,  Lorella Marturano

IPC: C08L23/06 ,  C08F10/02 ,  C08F210/16 ,  C08K5/00 ,  C08L71/02 ,  C08F2/34 ,  C08F2/44

CPC classification number: C08L23/06 ,  B01J8/224 ,  B01J8/24 ,  C08F2/34 ,  C08F2/44 ,  C08F10/00 ,  C08F10/02 ,  C08F210/16 ,  C08F2500/04 ,  C08F2500/07 ,  C08F2500/12 ,  C08K5/0075 ,  C08L71/02 ,  C08F2/005 ,  C08F110/02 ,  C08F2/001

Abstract: A process for preparing a polyolefin, including polymerizing olefins in the presence of an antistatic agent made from or containing an alkylene oxide derived polymer made from or containing in average from about 10 to about 200 repeating units —(CH2—CHR—O)— with R being hydrogen or an alkyl group having from 1 to 6 carbon atoms, wherein the alkylene oxide derived polymer is a random copolymer of ethylene oxide and other alkylene oxides and a ratio of n:m is in the range of from 6:1 to 1:1, wherein (n) is the average number of repeating units —(CH2—CH2—O)— derived from ethylene oxide and (m) is the average number of repeating units —(CH2—CHR′—O)— derived from the other alkylene oxides with R′ being an alkyl group having from 1 to 6 carbon atoms, and the end groups of the alkylene oxide derived polymer are —OH groups.

公开(公告)号：US20180022842A1

公开(公告)日：2018-01-25

申请号：US15503299

申请日：2015-08-13

Applicant: Basell Polyolefine GmbH

Inventor： Gerhardus Meier ,  Elke Damm ,  Reinhard Kuehl ,  Rodrigo Carvajal ,  Phil Pyman

IPC: C08F110/02

CPC classification number: C08F110/02 ,  C08F10/02 ,  C08F2500/05 ,  C08F2/001 ,  C08F2/18 ,  C08F2500/26

Abstract: A slurry polymerization process for the preparation of polyethylene in a reactor cascade of two or more polymerization reactors including the steps of feeding to a polymerization reactor amounts of ethylene, of a Ziegler catalyst, of fresh aluminum alkyl and of a diluent; feeding the slurry product withdrawn from the polymerization reactor to a second polymerization reactor; and feeding additional amounts of ethylene and of diluent wherein the ethylene is first passed through an ethylene purification unit, which reduces at least the concentration of carbon monoxide, carbon dioxide, oxygen, acetylene and water contained in the ethylene, before it is fed to the two or more polymerization reactors of the reactor cascade.

公开(公告)号：US09873754B2

公开(公告)日：2018-01-23

申请号：US14891506

申请日：2014-05-13

Applicant: Basell Polyolefine GmbH

Inventor： Gabriele Mei ,  Pietro Baita ,  Lorella Marturano ,  Antonio Mazzucco ,  Roberta Pica ,  Gerhardus Meier ,  Ulf Schueller

IPC: C08F2/01 ,  C08F4/646 ,  C08F110/02 ,  C08F2/00 ,  C08F10/02 ,  C08F4/655 ,  C08F4/654 ,  C08F4/656

CPC classification number: C08F110/02 ,  C08F2/001 ,  C08F2/002 ,  C08F4/654 ,  C08F4/6543 ,  C08F4/6548 ,  C08F4/655 ,  C08F4/6565 ,  C08F10/02 ,  C08F2/34 ,  C08F2500/18 ,  C08F2500/24 ,  C08F4/6492 ,  C08F4/6425

Abstract: A process for the gas-phase polymerization of ethylene or a mixture of ethylene and one or more 1 olefins in the presence of a polymerization catalyst system comprising the steps a) feeding a solid catalyst component, which was obtained by contacting at least a magnesium compound and a titanium compound, to a continuously operated apparatus and contacting the solid catalyst component with an aluminum alkyl compound at a temperature of from 0° C. to 70° C. in a way that the mean residence time of the solid catalyst component in contact with the aluminum alkyl compound is from 5 to 300 minutes; b) transferring the catalyst component formed in step a) into another continuously operated apparatus and prepolymerizing it with ethylene or a mixture of ethylene and one or more 1 olefins in suspension at a temperature of from 10° C. to 80° forming polymer in an amount of from 0.2 to 25 g polymer/g of solid catalyst component in a way that the mean residence time of the solid catalyst component in the apparatus is from 5 minutes to 3 hours; and c) transferring the prepolymerized catalyst component formed in step b) into a gas-phase polymerization reactor and polymerizing ethylene or a mixture of ethylene and one or more 1 olefins in the presence of the prepolymerized catalyst component at temperatures of from 40° C. to 120° C. and pressures of from 0.1 to 10 MPa.

公开(公告)号：US20180009916A1

公开(公告)日：2018-01-11

申请号：US15677814

申请日：2017-08-15

Applicant: Basell Polyolefine GmbH

Inventor： Shahram Mihan ,  Gerhardus Meier ,  Ulf Schueller ,  Michael Schiendorfer ,  Jens Wiesecke

IPC: C08F110/02 ,  C08F10/02 ,  H01B1/12

CPC classification number: C08F110/02 ,  C08F10/02 ,  C08F2410/02 ,  H01B1/12 ,  C08F210/16 ,  C08F210/14 ,  C08F2500/24 ,  C08F2500/07 ,  C08F2500/12 ,  C08F2500/13 ,  C08F2/005 ,  C08F2/34

Abstract: A process for the preparation of polyolefins by polymerizing olefins at temperatures of from 20 to 200° C. and pressures of from 0.1 to 20 MPa in the presence of a polymerization catalyst and an antistatically acting composition in a polymerization reactor, wherein the antistatically acting composition is a mixture comprising an oil-soluble surfactant and water and the use of an antistatically acting composition comprising an oil-soluble surfactant and water as antistatic agent for the polymerization of olefins at temperatures of from 20 to 200° C. and pressures of from 0.1 to 20 MPa in the presence of a polymerization catalyst.

公开(公告)号：US20170335028A1

公开(公告)日：2017-11-23

申请号：US15674176

申请日：2017-08-10

Applicant: Basell Polyolefine GmbH

Inventor： Dieter Littmann ,  Jürgen Peter Mohrbutter ,  Giulia Mei ,  Andre-Armand Finette ,  Sven Georg Wolfram ,  Michael Deuerling ,  Danir Khayrullin ,  Georg Groos ,  Christoph Wolf

IPC: C08F110/02 ,  B01J19/24 ,  C08J5/18

CPC classification number: C08F110/02 ,  B01J19/2415 ,  C08F2/01 ,  C08F2/34 ,  C08J5/18 ,  C08J2323/06 ,  C08F2/00 ,  C08F2500/12 ,  C08F2500/26

Abstract: The present technology relates to a process for polymerizing or copolymerizing ethylenically unsaturated monomers in the presence of free-radical polymerization initiators, wherein the polymerization is carried out in a continuously operated tubular reactor at temperatures from 100° C. to 350° C. and pressures from 180 MPa to 340 MPa, with a specific reactor surface area Asp of 2 m2/(t/h) to 5.5 m2/(t/h), and the tubular reactor has a specific ratio RDsp of 0.0050 MPa−1 to 0.0069 MPa−1 and an inner surface which has a surface roughness Ra of 2 μm or less.