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    IN-LINE BLENDING PROCESS
    2.
    发明申请
    IN-LINE BLENDING PROCESS 审中-公开

    公开(公告)号：US20180327529A1

    公开(公告)日：2018-11-15

    申请号：US15776095

    申请日：2016-12-21

    Applicant: Borealis AG

    Inventor： Henry Sleijster ,  Mohammad Al-Haj Ali ,  Jukka Rasanen ,  Samuli Zitting ,  Michiel Bergstra ,  Erik Eriksson ,  Christof Wurnitsch ,  Guhan Mathivanan ,  Sameer Vijay ,  Vasileios Kanellopoulos ,  Jani Aho ,  Jouni Takakarhu

    IPC: C08F210/14 ,  C08F210/02 ,  C08J11/02

    Abstract: An in-line blending process for polymers comprising: (a) providing two or more reactor-low pressure separator units (1,7) in parallel configuration, each reactor-low pressure separator unit comprising one reactor (2,8) fluidly connected to one low pressure separator (3,9) downstream and further a recycling line (5,11) connecting the low pressure separator (3,9) back to the corresponding reactor (2,8); (b) polymerizing olefm monomers having two or more carbon atoms in each of the reactors (2,8) in soltion polymerisation; (c) forming an unreduced reactor effluents stream including a homogenous fluid phase polymer-monomer-solvent mixture in each of the reactors (2,8), (d) passing the unreduced reactor effluents streams from each of the reactors (2,8) through the corresponding low pressure separators (3,9), whereby the temperature and pressure of the low pressure separators (3,9) is adjusted such that a liquid phase and a vapour phase are obtained, whereby yielding a polymer-enriched liquid phase and a polymer-lean vapour phase, and (e) separating the polymer-lean vapour phase from the polymer-enriched liquid phase in each of the low-pressure separators (3,9) to form separated polymer-lean vapour streams and separated polymer-enriched liquid streams; (f) combining the polymer-enriched liquid streams from step (e) in a further low-pressure separator and/or a mixer (13) to produce a combined polymer-enriched liquid stream (16); (g) reintroducing the polymer-lean vapour streams from step (e) via recycling lines (5,11) into the corresponding reactors (2,8).

    Process for producing polyethylene
    4.
    发明授权
    Process for producing polyethylene 有权

    公开(公告)号：US10364310B2

    公开(公告)日：2019-07-30

    申请号：US15548882

    申请日：2016-02-04

    Applicant: BOREALIS AG

    Inventor： Victor Sumerin ,  Joseph Thorman ,  Jani Aho ,  Markku Vahteri ,  Ravindra Tupe ,  Jarmo Kela

    IPC: C08F210/16 ,  C08F210/14 ,  C08L23/16

    Abstract: The present invention relates to a process for producing ethylene copolymers in a multistage process comprising at least one slurry phase polymerization stage and at least one gas phase polymerization stage in the presence of Ziegler Natta catalyst comprising a solid catalyst component, a cocatalyst of a compound of group 13 metal and an external additive selected from alkoxysilanes of formula (I) R1nSi(OR2)4-n, (I) where n is an integer 0 to 3, each R1 are equal or different and are selected among H, halogen, alkyl groups of 1 to 6 10 carbon atoms optionally substituted with one or more halogen atoms, alkenyl groups of 2 to 6 carbon atoms optionally substituted with one or more halogen atoms, and aryl groups of 6 to 12 carbon atoms optionally substituted with one or more halogen atoms, or the R1 groups can form with the Si atom they are linked to a ring of 3 to 8 ring atoms, provided that all R1 are not hydrogen, R2 are equal or different and are selected among alkyl groups of 1 to 6 carbon atoms optionally substituted with one or more halogen atoms, alkenyl groups of 2 to 6 carbon atoms optionally substituted with one or more halogen atoms, and aryl groups of 6 to 12 carbon atoms optionally substituted with one or more halogen atoms, or the OR2 groups can form with the Si atom they are linked to a ring of 3 to 8 ring atoms, halogen is Br, CI or F. The invention further relates to the catalysts and use thereof in said multistage process r for producing ethylene copolymers having melt flow rate ratio FRR21/5 at least 40 and/or polydispersity index PDI of at least 27.

    Process for feeding a polymerisation catalyst
    7.
    发明授权
    Process for feeding a polymerisation catalyst 有权

    公开(公告)号：US10946357B2

    公开(公告)日：2021-03-16

    申请号：US16098346

    申请日：2017-04-28

    Applicant: BOREALIS AG

    Inventor： Pauli Leskinen ,  Erno Elovainio ,  Katri Nikkilä ,  Jukka-Pekka Parjanen ,  Jani Aho

    IPC: C08F10/02 ,  C08F210/16 ,  B01J8/00 ,  B01J8/22 ,  C08F2/01 ,  C08F10/00

    Abstract: The present invention is directed to a process for feeding a polymerisation catalyst into a polymerisation reactor (7), comprising the steps of: (i) maintaining a catalyst slurry comprising a diluent and a solid catalyst component in a catalyst feed vessel (4); (ii) continuously withdrawing a stream of the catalyst slurry from the catalyst feed vessel (4); and (iii) introducing the withdrawn portion of the catalyst slurry into the polymerisation reactor (7), wherein the catalyst slurry is transferred by using a valveless piston pump (5) from the catalyst feed vessel (4) into the polymerisation reactor (7); the diluent has a dynamic viscosity of from 0.01 to 20 mPas at the conditions within the catalyst feed vessel (4), and wherein the catalyst slurry is transferred along a substantially vertical path downwards from the catalyst feed vessel (4) to the reactor (7).

    Process for producing LLDPE resins
    9.
    发明授权
    Process for producing LLDPE resins 有权

    公开(公告)号：US10584196B2

    公开(公告)日：2020-03-10

    申请号：US15739649

    申请日：2016-06-23

    Applicant: BOREALIS AG

    Inventor： Alexandra Romina Albunia ,  Ravindra Tupe ,  Victor Sumerin ,  John Jamieson ,  Jani Aho ,  Markku Vahteri ,  Jarmo Kela ,  Renate Eckmayr

    IPC: C08F210/16 ,  C08F110/02 ,  C08F2/00 ,  C08F2/14 ,  C08F2/34 ,  C08F4/02 ,  C08L23/08 ,  C08L23/06

    Abstract: A process for producing copolymers of ethylene and at least one alpha-olefin having from 4 to 10 carbon atoms in the presence of a solid Ziegler-Natta catalyst comprising of magnesium, titanium, halogen and an internal organic compound, the copolymer having a density of from 906 to 937 kg/m3 and a melt flow rate MFR21 measured at 190° C. under 21.6 kg load of from 3 to 150 g/10 min. The process includes the steps of (A) homopolymerising ethylene or copolymerising ethylene and a first alpha-olefin having from 4 to 10 carbon atoms in a first polymerisation stage in the presence of the polymerisation catalyst, hydrogen and optionally the first alpha-olefin; (B) copolymerising ethylene and a second alpha-olefin having from 4 to 10 carbon atoms in a second polymerisation stage in the presence of the first homo- or copolymer of ethylene and the Ziegler-Natta catalyst; and (C) recovering the polymer mixture.

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