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    CONTINUOUS TAKE OFF TECHNIQUE AND PRESSURE CONTROL OF POLYMERIZATION REACTORS
    7.
    发明申请
    CONTINUOUS TAKE OFF TECHNIQUE AND PRESSURE CONTROL OF POLYMERIZATION REACTORS 审中-公开
    连续采用聚合反应器的技术和压力控制

    公开(公告)号：WO2011146334A1

    公开(公告)日：2011-11-24

    申请号：PCT/US2011/036434

    申请日：2011-05-13

    Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY LP ,  HOTTOVY, John, D.

    Inventor： HOTTOVY, John, D.

    IPC: C08F10/00 ,  C08F2/00

    CPC classification number: B01J19/245 ,  B01J19/1837 ,  C08F10/00 ,  C08F2400/02 ,  C08F2/002 ,  C08F2/01 ,  C08F2/001

    Abstract: Techniques and systems for producing a polyolefin using reactors in series are described. Described embodiments include techniques and systems for polymerizing a monomer in a first polymerization reactor to form a first polyolefin, discharging a first slurry continuously from the first polymerization reactor to a second polymerization reactor, and discharging a second slurry continuously from the second polymerization reactor. Using continuous take-off devices disposed on either or both reactors, pressure control may be attained such that the rate of transfer between and withdrawal from both reactors are within a desired range.

    Abstract translation: 描述了使用串联反应器生产聚烯烃的技术和系统。 描述的实施方案包括用于在第一聚合反应器中聚合单体以形成第一聚烯烃的技术和系统，将第一浆料从第一聚合反应器连续排出到第二聚合反应器，并从第二聚合反应器连续排出第二浆料。 使用设置在任一个或两个反应器上的连续取出装置，可以实现压力控制，使得两个反应器之间的转移速率和从两个反应器中回收的速率在期望的范围内。

    PROCESS FOR THE PREPARATION OF ETHYLENE HOMOPOLYMERS OR COPOLYMERS IN A HIGH-PRESSURE REACTOR CONTROLLED BY A MODEL BASED PREDICTIVE CONTROLLER
    8.
    发明申请
    PROCESS FOR THE PREPARATION OF ETHYLENE HOMOPOLYMERS OR COPOLYMERS IN A HIGH-PRESSURE REACTOR CONTROLLED BY A MODEL BASED PREDICTIVE CONTROLLER 审中-公开
    在基于模型的预测控制器控制的高压反应器中制备乙烯共聚物或共聚物的方法

    公开(公告)号：WO2011076372A1

    公开(公告)日：2011-06-30

    申请号：PCT/EP2010/007786

    申请日：2010-12-20

    Applicant: BASELL POLYOLEFINE GMBH ,  SCHMIDT, Christian-Ulrich ,  BERHALTER, Klaus ,  MAKIN, Steve ,  TAYLOR, Kevin

    Inventor： SCHMIDT, Christian-Ulrich ,  BERHALTER, Klaus ,  MAKIN, Steve ,  TAYLOR, Kevin

    IPC: C08F10/02 ,  C08F2/00

    CPC classification number: C08F110/02 ,  C08F2400/02 ,  C08F2/00 ,  C08F2500/12

    Abstract: Process for the preparation of ethylene homopolymers or copolymers in the presence of free-radical polymerization initiator at from 100°C to 350°C and pressures in the range of from 160 MPa to 350 MPa in a high-pressure polymerization unit comprising a high-pressure reactor with one or more reaction zones, to each of which free-radical polymerization initiator is fed, which is controlled by a model based predictive controller carrying out the steps a) feeding target values for density and melt flow rate (MFR) of the ethylene homopolymer to be prepared as setpoint ranges to the controller if an ethylene homopolymers is prepared or feeding target values for density, MFR and copolymer composition of the ethylene copolymer of to be prepared as setpoint ranges to the controller if an ethylene copolymer is prepared; b) measuring data in the high-pressure polymerization unit and calculating by means of a model based on these data a value for the density of the ethylene homopolymer or copolymer currently prepared in the high-pressure reactor; c) independently of step b), measuring data in the high-pressure polymerization unit and calculating by means of a model based on these data a value for the MFR of the ethylene homopolymer or copolymer currently prepared in the high-pressure reactor; d) if an ethylene copolymer is prepared, independently of steps b) and c), measuring data in the high-pressure polymerization unit and calculating by means of a model based on these data a value for the copolymer composition of the ethylene copolymer currently prepared in the high-pressure reactor; e) feeding the calculated values for the density, for the MFR and, if an ethylene copolymer is prepared, for the copolymer composition as controlled variables to the controller; and f) measuring data in the high-pressure polymerization unit and calculating by means of the controller based on these measured data, the setpoint ranges fed in step a) and the values calculated in steps b), c) and d) as outputs setpoint ranges for manipulated variables of the high-pressure polymerization unit including setpoint ranges for feeding the free-radical polymerization initiator, wherein the calculation of the setpoint ranges for feeding the free-radical polymerization initiator is repeated at least every 3 minutes, method of controlling a process for the preparation of ethylene homopolymers or copolymers in a high-pressure reactor and method for transitioning from one grade to another in a process for the preparation of ethylene homopolymers or copolymers in a high-pressure reactor.

    Abstract translation: 在100℃至350℃的自由基聚合引发剂存在下制备乙烯均聚物或共聚物的方法，在包含高分子量聚合物的高压聚合单元中，在160MPa至350MPa的压力范围内， 压力反应器，具有一个或多个反应区，其中每一个自由基聚合引发剂被供给，其由基于模型的预测控制器控制，执行步骤a）将目标值的密度和熔体流动速率（MFR） 如果制备乙烯均聚物或制备乙烯共聚物的密度，MFR和共聚物组成的目标值，如拟备乙烯共聚物，则将要作为设定值范围制备为控制器的控制器的设定值范围的乙烯均聚物; b）测量高压聚合单元中的数据并通过基于这些数据的模型计算目前在高压反应器中制备的乙烯均聚物或共聚物的密度值; c）独立于步骤b），测量高压聚合单元中的数据，并且通过基于这些数据的模型计算当前在高压反应器中制备的乙烯均聚物或共聚物的MFR值; d）如果制备乙烯共聚物，独立于步骤b）和c），测量高压聚合单元中的数据并通过基于这些数据的模型计算目前制备的乙烯共聚物的共聚物组成的值 在高压反应器中; e）给出密度的计算值，对于MFR，并且如果制备乙烯共聚物，则将共聚物组合物作为控制器的受控变量; 以及f）测量高压聚合单元中的数据并且通过控制器基于这些测量数据计算在步骤a）中给出的设定值范围和在步骤b），c）和d）中计算的值作为输出设定值 高压聚合单元的操作变量的范围包括供给自由基聚合引发剂的设定点范围，其中至少每3分钟重复供给自由基聚合引发剂的设定点范围的计算，控制方法 用于在高压反应器中制备乙烯均聚物或共聚物的方法中用于在高压反应器中制备乙烯均聚物或共聚物的方法和用于在高压反应器中制备乙烯均聚物或共聚物的方法从一个等级转变为另一个级别的方法。

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