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    Process for the polymerisation of isobutene
    2.
    发明授权
    Process for the polymerisation of isobutene 失效
    异丁烯聚合方法

    公开(公告)号：US07176032B2

    公开(公告)日：2007-02-13

    申请号：US10311018

    申请日：2001-06-14

    申请人： Christian Sait ,  Gacem Benazzouz

    发明人： Christian Sait ,  Gacem Benazzouz

    IPC分类号： G01N33/44

    CPC分类号： C08F110/10 ,  Y10T436/12 ,  C08F2/00

    摘要： A process for maintaining a property P of a polyisobutene around a target value V during a continuous polymerisation of isobutene in a reactor containing a boiling liquid reaction phase in equilibrium with a gas phase above the liquid phase. The process comprises continuously introducing, into the reactor, a catalyst and a C4 hydrocarbon feed and continuously withdrawing, from the reactor, the liquid reaction phase which is subsequently subjected, continuously, to at least one purification step to isolate the polyisobutene. The property P is chosen amongst the viscosity and the average molecular mass of the polyisobutene. The property P is maintained around the target value V (i) by measuring the isobutene partial pressure (PiC4) in the gas phase of the reactor, (ii) by calculating the isobutene concentration (CiC4R2) in the boiling liquid reaction phase by means of a first model predicting the value of CiC4R2 from the measured value of PiC4 and being based on liquid/vapor equilibrium law, (iii) by calculating an instantaneous value Pinst of the property P by means of a second model predicting the value of Pinst from the calculated value of CiC4R2 and including at least one function of the isobutene polymerisation kinetics, and (iv) by varying at least one process parameter so as to make the instantaneous value Pinst tend towards the target value V.

    摘要翻译： 在含有与液相上方的气相平衡的沸腾液体反应相的反应器中异丁烯的连续聚合期间，将聚异丁烯的性质P维持在目标值V附近的方法。 该方法包括连续向反应器中引入催化剂和C 4烃原料，并从反应器中连续地将液相反应相连续地连续抽出至至少一个纯化步骤以分离聚异丁烯。 性质P选自聚异丁烯的粘度和平均分子量。 通过测量反应器气相中的异丁烯分压（PiC4），将性能P维持在目标值V（i）附近，（ii）通过计算反应器中异丁烯浓度（C 1 S 2 S 2 S 2） 沸点液体反应阶段，通过从PiC4的测量值预测CiC4 的值的第一模型，并基于液/气平衡定律，（iii）通过计算瞬时值Pinst 该性质P通过第二模型，从计算的CiC4R2R2值估计Pinst的值，并包括异丁烯聚合动力学的至少一个函数，和（iv）通过改变至少一个过程 参数，以使瞬时值Pinst趋于目标值V.