中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

7 records (took 0.01 seconds)

    METHOD AND APPARATUS FOR POLYMERISING OLEFINS IN GAS PHASE
    3.
    发明申请
    METHOD AND APPARATUS FOR POLYMERISING OLEFINS IN GAS PHASE 审中-公开

    公开(公告)号：US20180155465A1

    公开(公告)日：2018-06-07

    申请号：US15569954

    申请日：2016-06-10

    Applicant: Borealis AG

    Inventor： Vasileios KANELLOPOULOS ,  Klaus NYFORS ,  Pablo Ivan AGUAYO ARELLANO ,  Gunter WEICKERT ,  Eric-Jan PRINSEN

    IPC: C08F10/02 ,  B01J8/18 ,  B01J8/00

    Abstract: The present invention deals with an olefin polymerisation process. At least one olefin is polymerised in gas phase in a fluidised bed in the presence of an olefin polymerisation catalyst in a polymerisation reactor having a vertical body; a generally conical downwards tapering bottom zone; a generally cylindrical middle zone above and connected to said bottom zone; and a generally conical upwards tapering top zone above and connected to said middle zone. Fluidisation gas is introduced to the bottom zone of the reactor from where it passes upwards through the reactor, and withdrawn from the top zone of the reactor. The gas is then compressed, cooled and returned into the bottom zone of the reactor. A fluidised bed is thus formed within the reactor where the growing polymer particles are suspended in the upwards rising gas stream wherein the superficial velocity of the fluidisation gas is less than the transport velocity of the particles. There is no fluidisation grid in the reactor. The fluidisation gas is passed from an inlet chamber into the bottom zone and the gas flows from the upper part of the inlet chamber to the lower part thereof and the gas flows from the lower part of the inlet chamber to the bottom zone.

    Catalyst Feed System
    4.
    发明公开
    Catalyst Feed System 审中-公开

    公开(公告)号：US20240001317A1

    公开(公告)日：2024-01-04

    申请号：US18254729

    申请日：2021-11-04

    Applicant: Borealis AG

    Inventor： Klaus NYFORS ,  Jouni KIVELÄ ,  Mubashar SATTAR ,  Samuli ZITTING ,  Erno ELOVAINIO ,  Mikko LYLYKANGAS ,  Jan LINDHOLM ,  Danny COX

    IPC: B01J8/00 ,  B01J8/18 ,  B01J8/22 ,  C08F10/00

    CPC classification number: B01J8/0035 ,  B01J8/002 ,  B01J8/003 ,  B01J8/1809 ,  B01J8/22 ,  C08F10/00 ,  B01J2208/0061 ,  B01J2208/00752

    Abstract: The present invention relates to a process for feeding a polymerization catalyst into a polymerization reactor, said process comprising the steps of: (i) forming a catalyst slurry comprising oil and a solid catalyst component in a first catalyst preparation vessel; (ii) transferring the catalyst slurry from the first catalyst preparation vessel to a first catalyst feed vessel; (iii) maintaining the catalyst slurry in the first catalyst feed vessel in a homogeneous state; (iv) withdrawing a portion of the catalyst slurry from the first catalyst feed vessel, preferably continuously withdrawing the catalyst slurry from the first catalyst feed vessel, and introducing the withdrawn portion of the catalyst slurry into a polymerization reactor; wherein the oil has a dynamic viscosity of from 25 to 1500 mPa*s at the conditions within the first catalyst preparation vessel and the first catalyst feed vessel, wherein the catalyst slurry is transferred along a substantially vertical path downwards from the first catalyst feed vessel to the reactor.

    METHOD OF POLYMERIZING OLEFINS IN SLURRY REACTORS
    7.
    发明申请
    METHOD OF POLYMERIZING OLEFINS IN SLURRY REACTORS 有权
    在浆料反应器中聚合烯烃的方法

    公开(公告)号：US20150259446A1

    公开(公告)日：2015-09-17

    申请号：US14723016

    申请日：2015-05-27

    Applicant: BOREALIS AG

    Inventor： Ilke SENOL ,  Erik ERIKSSON ,  Kauno ALASTALO ,  Pauli LESKINEN ,  Klaus NYFORS

    IPC: C08F110/02

    CPC classification number: C08F110/02 ,  C08F2/14 ,  C08F10/02 ,  C08F2/001 ,  C08F2500/12

    Abstract: A process including polymerizing ethylene in the presence of a polymerization catalyst and hydrogen in a first polymerization reactor to produce a first slurry; withdrawing a first stream of the slurry from the first polymerization reactor; directing the slurry stream into a second polymerization reactor; polymerizing ethylene in the presence of the first ethylene polymer, the polymerization catalyst, and hydrogen in a second polymerization reactor to produce a second slurry; withdrawing from the second polymerization reactor a second slurry stream having a solids concentration higher than the average solids concentration of the second slurry within the second polymerization reactor; withdrawing from the second polymerization reactor a third slurry stream having a solids concentration lower than the average solids concentration of the second slurry within the second polymerization reactor; and directing at least a part of the second slurry stream into one of the first and second polymerization reactors.

    Abstract translation: 一种方法，包括在聚合催化剂和氢存在下在第一聚合反应器中聚合乙烯以产生第一浆料; 从第一聚合反应器中取出第一浆料流; 将浆料流引导到第二聚合反应器中; 在第二聚合反应器中在第一乙烯聚合物，聚合催化剂和氢的存在下聚合乙烯以产生第二浆料; 从所述第二聚合反应器中排出具有高于所述第二聚合反应器内的所述第二浆料的平均固体浓度的固体浓度的第二浆料流; 从所述第二聚合反应器中排出具有低于所述第二聚合反应器内的所述第二浆料的平均固体浓度的固体浓度的第三浆料流; 以及将所述第二浆料流的至少一部分引导到所述第一和第二聚合反应器之一中。

Patent Agency Ranking