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    • 6. 发明授权
    • Process for the preparation of a polyolefin polymer with improved wax deposition
    • 用于制备具有改进的蜡沉积的聚烯烃聚合物的方法
    • US08802795B2
    • 2014-08-12
    • US13818845
    • 2011-08-30
    • Gerhardus MeierReinhard KuehlHarald PrangMichael Aulbach
    • Gerhardus MeierReinhard KuehlHarald PrangMichael Aulbach
    • C08F2/12C08F6/24C08F210/08
    • C08F2/04C08F210/16C08F2/001C08F2/14C08F210/14
    • Process for the preparation of a polyolefin polymer by continuously polymerizing one or more olefin monomers in suspension at temperatures of from 40° C. to 120° C. and pressures of from 0.1 to 10 MPa in the presence of a polymerization catalyst in at least one polymerization reactor, comprising a) withdrawing a suspension of solid polyolefin particles in a suspension medium from the polymerization reactor, wherein the suspension has a temperature of from 65° C. to 120° C.; b) feeding the suspension withdrawn from the polymerization reactor to a moderating vessel; c) keeping the suspension in the moderating vessel at a temperature of from 60° C. to 85° C. for a time sufficiently long that the mean residence time of the suspension in the moderating vessel is at least 5 min; d) withdrawing suspension from the moderating vessel; e) cooling the suspension withdrawn from the moderating vessel to a temperature of from 20° C. to 55° C.; and f) mechanically separating the solid polyolefin particles from the liquid suspension medium, and method for controlling the content of hydrocarbons with from 14 to 300 carbon atoms in a polyolefin polymer prepared by polymerizing one or more olefin monomers in suspension.
    • 在聚合催化剂存在下,在至少一种聚合催化剂的存在下,通过在40℃至120℃的温度和0.1至10MPa的温度下将悬浮液中的一种或多种烯烃单体连续聚合来制备聚烯烃聚合物的方法 聚合反应器,包括a)从聚合反应器中取出固体聚烯烃颗粒在悬浮介质中的悬浮液,其中悬浮液的温度为65℃至120℃; b)将从聚合反应器中取出的悬浮液送入调节容器; c)将悬浮液在调节容器中保持在60℃至85℃的温度下足够长的时间,使得悬浮液在调节容器中的平均停留时间为至少5分钟; d)从缓和容器中取出悬浮液; e)将从调节容器中取出的悬浮液冷却至20℃至55℃的温度; 和f)从液体悬浮介质中机械分离固体聚烯烃颗粒,以及通过在悬浮液中聚合一种或多种烯烃单体制备的聚烯烃聚合物中控制含有14至300个碳原子的烃的含量的方法。
    • 9. 发明申请
    • Method for Transitioning Between Incompatible Olefin Polymerization Catalyst Systems
    • 不相容的烯烃聚合催化剂体系的转化方法
    • US20110294957A1
    • 2011-12-01
    • US13133803
    • 2009-12-17
    • Gerhardus MeierShahram Mihan
    • Gerhardus MeierShahram Mihan
    • C08F255/00C08F4/64C08F2/34C08F4/24
    • C08F210/16C08F4/65912C08F4/65916C08F4/65925C08F10/00C08F2410/05C08F4/69C08F4/642C08F2/34C08F2/42C08F210/08C08F210/14C08F2500/12C08F2500/18C08F2500/07C08F4/7042C08F4/61904
    • A method for transitioning from a Ziegler-Natta to a Phillips catalyst system for the olefin polymerization reaction in one reactor, preferably a gas phase reactor, is described. The method comprises the steps of a) discontinuing a first olefin polymerization reaction performed in the presence of the Ziegler-Natta catalyst system; b) performing a second olefin polymerization reaction in the presence of a further catalyst system comprising catalyst components (A) and (B) producing, respectively, a first and a second polyolefin fraction, wherein the Mw of the first polyolefin fraction is less than the Mw of the second polyolefin fraction and the initial activity of catalyst component (A) exceeds the initial activity of catalyst component (B); and c) performing a third olefin polymerization reaction the presence of the Phillips catalyst system. Thanks to this method, there is no need to empty the reactor after each olefin polymerization reaction, and the transitioning time needed to attain the desired quality of the polyolefin obtained in each olefin polymerization reaction subsequent to the first one is sufficiently short to permit a quick and reliable change of production.
    • 描述了在一个反应​​器,优选气相反应器中从齐格勒 - 纳塔过渡到用于烯烃聚合反应的菲利普斯催化剂体系的方法。 该方法包括以下步骤:a)停止在齐格勒 - 纳塔催化剂体系存在下进行的第一种烯烃聚合反应; b)在另外的催化剂体系存在下进行第二烯烃聚合反应,所述催化剂体系包含分别产生第一和第二聚烯烃部分的催化剂组分(A)和(B),其中第一聚烯烃部分的Mw小于 第二聚烯烃级分的Mw和催化剂组分(A)的初始活性超过催化剂组分(B)的初始活性; 和c)进行第三烯烃聚合反应的存在的菲利浦催化剂体系。 由于这种方法,在每个烯烃聚合反应之后不需要清空反应器,并且在第一个烯烃聚合反应之后获得的每个烯烃聚合反应中获得的聚烯烃所需的质量所需的转化时间足够短,以使快速 可靠的生产变更。