Apparatus for preparing polyolefin products and methodology for using the same
    7.
    发明申请
    Apparatus for preparing polyolefin products and methodology for using the same 有权
    用于制备聚烯烃产品的设备及其使用方法

    公开(公告)号:US20040225084A1

    公开(公告)日:2004-11-11

    申请号:US10758499

    申请日:2004-01-15

    IPC分类号: C08F002/00

    摘要: Apparatus for olefin polymerization includes a plurality of shell and tube olefin polymerization reactors, each of which has an olefin polymerization reaction mixture inlet connection and a crude polyolefin product outlet connection. Each reactor is equipped with a recirculation system including a pump arranged to circulate a reaction mixture through the tube side of the reactor independently of the introduction of olefin polymerization reaction mixture into the reactor. The apparatus also includes an inlet reaction mixture distribution manifold and an outlet polymerization reaction mixture collection manifold interconnecting the reactors for operation in parallel. The apparatus also includes catalyst composition and catalyst modifier inlets for each reactor arranged such that a catalyst modifier to may be introduced into each reactor at a rate which is independent of the introduction of catalyst composition. The apparatus further incorporates a crude polyolefin product catalyst removal and wash system including a plurality of settler vessels, associated piping and an inlet for a catalyst killing agent. This crude polyolefin product catalyst removal and wash system operates to receive crude polyolefin product from the crude polyolefin product outlet and remove residual catalyst therefrom.

    摘要翻译: 用于烯烃聚合的设备包括多个壳和管烯烃聚合反应器,每个反应器具有烯烃聚合反应混合物入口连接和粗聚烯烃产物出口连接。 每个反应器配备有循环系统,其包括泵,其被布置成使反应混合物循环通过反应器的管侧,而与将烯烃聚合反应混合物引入反应器中无关。 该装置还包括入口反应混合物分配歧管和出口聚合反应混合物收集歧管,其将反应器互连以并行操作。 该装置还包括用于每个反应器的催化剂组合物和催化剂改性剂入口,其布置成使催化剂改性剂以不同于引入催化剂组合物的速率引入每个反应器中。 该装置还包括粗聚烯烃产物催化剂去除和洗涤系统,其包括多个沉降器容器,相关联的管道和用于催化剂杀伤剂的入口。 该粗聚烯烃产物催化剂去除和洗涤系统用于从粗聚烯烃产物出口接收粗聚烯烃产物并从其中除去残留的催化剂。

    Process control for vinyl acetate manufacture
    9.
    发明授权
    Process control for vinyl acetate manufacture 有权
    乙酸乙烯酯生产过程控制

    公开(公告)号:US06420595B1

    公开(公告)日:2002-07-16

    申请号:US09950903

    申请日:2001-09-10

    IPC分类号: C07C6705

    摘要: A method of real time process control in a reaction system for the production of vinyl acetate from the oxidation of ethylene and acetic acid. Reaction system samples are collected from the reactor vessel feed and/or effluent and/or from columns and/or transfer lines downstream of the reactor vessel, and the concentration of one or more components in the sample is measured by an infrared analyzer. The concentration measurements are then used to make adjustments in the concentration of components in the reaction system, directly or indirectly, such as by adjusting the temperature profile in a particular column, the flow rate of solution in to or out of a column, or the addition or extraction of a component to or from the solution. For optimum process control, the measurements are transmitted to a control unit for real time analysis, and the adjustments are made almost instantly after the infrared analysis.

    摘要翻译: 在由乙烯和乙酸的氧化生产乙酸乙烯酯的反应体系中实时过程控制的方法。 从反应器容器进料和/或流出物和/或从反应器容器下游的塔和/或输送管线收集反应体系样品,并通过红外分析仪测量样品中一种或多种组分的浓度。 然后使用浓度测量法直接或间接地对反应体系中组分的浓度进行调整,例如通过调节特定塔中的温度分布,溶液进出塔的流速,或 将组分加入或从溶液中萃取。 为了进行最佳的过程控制,将测量结果发送到控制单元进行实时分析,并在红外分析后几乎立即进行调整。