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    • 7. 发明申请
    • PRESSURE CONTROL OF THE CATALYST MIXING VESSEL
    • 催化混合容器的压力控制
    • WO2012013802A1
    • 2012-02-02
    • PCT/EP2011/063143
    • 2011-07-29
    • TOTAL PETROCHEMICALS RESEARCH FELUYBRUSSELLE, AlainDEWACHTER, DaanFOUARGE, Louis
    • BRUSSELLE, AlainDEWACHTER, DaanFOUARGE, Louis
    • C08F10/02C08F2/01C08F2/14
    • G05D16/02B01J8/0035B01J8/20B01J2219/00162C08F4/76C08F10/02C08F2/14C08F2/01
    • The present invention relates to a process for preparing catalyst slurry in a catalyst slurry preparation system and supplying catalyst slurry to an ethylene polymerization loop reactor wherein an accurate control of the pressure within said catalyst slurry preparation system is provided. More particularly, the present invention provides a method for preparing a catalyst slurry and supplying said catalyst slurry to an ethylene polymerization loop reactor, said catalyst slurry comprising solid catalyst and a liquid hydrocarbon diluent, wherein said method comprises the steps of: (a) feeding concentrated catalyst slurry to a mixing vessel by means of a feeding device; (b) diluting said concentrated catalyst slurry in a suitable amount of said diluent in a mixing vessel thereby obtaining a diluted catalyst slurry having a concentration suitable for use in an ethylene polymerization reaction; wherein said mixing vessel is provided with at least one pressure regulating unit connected therewith and wherein said pressure regulating unit comprises a pulsation dampener; and (c) transferring said diluted catalyst slurry from said mixing vessel to said ethylene polymerization loop reactor; characterized in that the method comprises the step of maintaining said mixing vessel essentially free of a gaseous phase by regulating the pressure in said mixing vessel using said at least one pressure regulating unit comprising the pulsation dampener.
    • 本发明涉及一种在催化剂浆料制备系统中制备催化剂浆料并将催化剂浆料供应到乙烯聚合反应器中的方法,其中提供了所述催化剂浆料制备系统内的压力的精确控制。 更具体地说,本发明提供了一种制备催化剂浆料并将所述催化剂浆料供应到乙烯聚合反应器的方法,所述催化剂浆料包括固体催化剂和液体烃稀释剂,其中所述方法包括以下步骤:(a) 浓缩的催化剂浆料通过进料装置进入混合容器; (b)将所述浓缩催化剂浆液在合适量的稀释剂中稀释在混合容器中,由此获得具有适合用于乙烯聚合反应的浓度的稀释催化剂浆料; 其中所述混合容器设置有与其连接的至少一个压力调节单元,并且其中所述压力调节单元包括脉动阻尼器; 和(c)将所述稀释的催化剂浆料从所述混合容器转移到所述乙烯聚合反应器中; 其特征在于,所述方法包括通过使用包括脉动阻尼器的所述至少一个压力调节单元来调节所述混合容器中的压力来维持所述混合容器基本上不含气相的步骤。
    • 10. 发明申请
    • SLURRY LOOP REACTORS
    • WO2005080443A3
    • 2005-09-01
    • PCT/EP2005/050531
    • 2005-02-08
    • TOTAL PETROCHEMICALS RESEARCH FELUYFOUARGE, LouisVAN CAMP, Carl
    • FOUARGE, LouisVAN CAMP, Carl
    • C08F2/14
    • An apparatus defined as a set of loop reactors suitable for the polymerization process of a monomer, preferably ethylene and optionally an olefin co­monomer, comprising for each of said reactors: a plurality of interconnected pipes P defining a flow path for a polymer slurry, said slurry consisting essentially of ethylene, optionally a co­monomer, a polymerization catalyst, liquid diluent and solid olefin polymer particles, means for feeding monomer, optionally a co-monomer, diluent and optionally hydrogen in the reactor, means for feeding a polymerization catalyst in the reactor, a pump suitable for maintaining the polymer slurry in circulation in such reactor, one or more settling legs connected to the pipes P of such reactor for settling of polymer slurry, one or more control valves connected to the outlet of such settling legs, and one or more flash lines for discharging settled polymer slurry out of the reactor characterized in that each of said loop reactors comprises a three-or-more-way valve defining three-or-more ends, one end A being positioned at the outlet of said one or more control valves. A method to switch from series to parallel configuration a set of loop reactors. The use of the apparatus to switch polymerization reactors from parallel to series configuration and vice-versa.