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    • 11. 发明申请
    • GAS PHASE POLYMERIZATION PROCESS
    • 气相聚合方法
    • WO2015128469A1
    • 2015-09-03
    • PCT/EP2015/054149
    • 2015-02-27
    • BOREALIS AG
    • KANELLOPOULOS, VasileiosKRALLIS, ApostolosAL-HAJ ALI, MohammadTUPE, Ravindra
    • C08F2/01C08F2/34
    • C08F2/34C08F2/01C08F110/02
    • An olefin polymerization process comprising polymerizing olefins in gas phase in a fluidized bed in the presence of an olefin polymerization catalyst in a polymerization reactor having a vertical body; a generally conical downwards tapering bottom zone; a generally cylindrical middle zone having a height to diameter ratio L/D of at least 4, above and connected to said bottom zone; and a generally conical upwards tapering top zone above and connected to said middle zone wherein (i) fluidization gas is introduced to the bottom zone of the reactor from where it passes upwards through the reactor; (ii) the fluidization gas is withdrawn from the top zone of the reactor, filtered, compressed, cooled and returned into the bottom zone of the reactor; (iii) a fluidized bed is formed within the reactor where the growing polymer particles are suspended in the upwards rising gas stream; and (iv) there is no fluidization grid in the reactor; characterized in that the gas velocity is maintained in the reactor such that N Br is within the range of from 2.5 to 7.
    • 一种烯烃聚合方法,包括在具有垂直体的聚合反应器中,在烯烃聚合催化剂存在下,在流化床中气相聚合烯烃; 大致圆锥形的向下锥形底部区域; 大致圆柱形的中间区域,其高度与直径之比L / D至少为4,高于并连接到所述底部区域; 以及在所述中间区域上方并连接到所述中间区域的大致锥形的向上锥形顶部区域,其中(i)流化气体被引导到反应器的底部区域,从该区域向上通过反应器; (ii)流化气体从反应器的顶部区域排出,过滤,压缩,冷却并返回到反应器的底部区域; (iii)在反应器内形成流化床,其中生长的聚合物颗粒悬浮在向上升的气流中; 和(iv)反应器中不存在流化栅; 其特征在于,气体速度保持在反应器中,使得NBr在2.5至7的范围内。
    • 20. 发明申请
    • PROCESS FOR POLYMERISING ALPHA-OLEFIN MONOMERS
    • 聚合α-烯烃单体的方法
    • WO2017097577A1
    • 2017-06-15
    • PCT/EP2016/078380
    • 2016-11-22
    • BOREALIS AG
    • ALASTALO, KaunoAL-HAJ ALI, MohammadKANELLOPOULOS, VasileiosKRALLIS, Apostolos
    • C08F2/01B01J19/18B01J19/24C08F2/12
    • C08F2/01B01J19/1837C08F2/12
    • A process for polymerising alpha-olefin monomers in a loop reactor comprising the steps of introducing a main feed stream (2) comprising at least one alpha-olefin monomer into the loop reactor (1); introducing a polymerisation catalyst into the loop reactor (1); polymerising the at least one alpha-olefin monomer in the presence of the polymerisation catalyst in the loop reactor (1) to produce a slurry comprising polyolefin particles; withdrawing an outlet stream (4) comprising at least a portion of the slurry from the loop reactor (1); adding a first feed stream (9) comprising the at least one alpha-olefin monomer and/or hydrogen to the outlet stream (4) to form a concentrator inlet stream (8); introducing the concentrator inlet stream (8) into a concentrator (5); withdrawing from the concentrator (5) an overflow stream (6) comprising the polyolefin particles, wherein the concentration of the polyolefin particles in the overflow stream (6) is smaller than in the concentrator inlet stream (8); withdrawing from the concentrator (5) a bottom outlet stream (12) comprising the polyolefin particles, wherein the concentration of the polyolefin particles in the bottom outlet stream (12) is greater than in the concentrator inlet stream (8); returning the overflow stream (6) into the loop reactor (1) in an area different from that from which the outlet stream (4) is withdrawn.
    • 一种在环管反应器中聚合α-烯烃单体的方法,包括以下步骤:将包含至少一种α-烯烃单体的主进料流(2)引入环管反应器(1)中; 将聚合催化剂引入环流反应器(1)中; 在回路反应器(1)中在聚合催化剂存在下聚合至少一种α-烯烃单体以产生包含聚烯烃颗粒的浆料; 从回路反应器(1)中取出包含至少一部分淤浆的出口流(4); 将包含所述至少一种α-烯烃单体和/或氢气的第一进料流(9)加入所述出口流(4)以形成浓缩器入口流(8); 将浓缩器入口流(8)引入浓缩器(5)中; 从浓缩器(5)中排出包含聚烯烃颗粒的溢流流(6),其中溢流流(6)中聚烯烃颗粒的浓度小于浓缩器入口流(8)中的浓度; 从浓缩器(5)中排出包含聚烯烃颗粒的底部出口流(12),其中底部出口流(12)中的聚烯烃颗粒的浓度大于浓缩器入口流(8)中的聚烯烃颗粒的浓度; 在与出口物流(4)被抽出的区域不同的区域中将溢流物流(6)返回到环流反应器(1)中。