Method for controlling the polymer flow in a polymerization process
    3.
    发明授权
    Method for controlling the polymer flow in a polymerization process 有权
    在聚合过程中控制聚合物流动的方法

    公开(公告)号:US07405260B2

    公开(公告)日:2008-07-29

    申请号:US10589591

    申请日:2005-01-31

    Abstract: A method for controlling the flowability of polymer particles flowing downward in a densified form inside a polymerization reactor, in which one or more monomers are gas-phase polymerized in the presence of a polymerization catalyst, the density of solid (Kg of polymer per m3 of reactor occupied by the polymer) being higher than 80% of the “poured bulk density” of the polymer, the method being characterized in that a liquid stream is continuously fed into the polymerization reactor at a mass flow rate per unity of reactor surface higher than 30 Kg/h m2.

    Abstract translation: 一种控制聚合反应器内以致密化形式向下流动的聚合物颗粒的流动性的方法,其中一种或多种单体在聚合催化剂存在下进行气相聚合,固体密度(Kg / 由聚合物占据的反应器的3重量%)高于聚合物的“倾倒堆积密度”的80%,该方法的特征在于将液体流以质量流量连续地供入聚合反应器 反应器表面的单位速率高于30Kg / hm 2。

    Solid-liquid reaction
    7.
    发明申请
    Solid-liquid reaction 失效
    固液反应

    公开(公告)号:US20040204605A1

    公开(公告)日:2004-10-14

    申请号:US10487214

    申请日:2004-02-19

    Abstract: A process for carrying out a liquid/solid reaction comprises a) preparing a reaction suspension in which a first reactant is present in suspended form and a second reactant is present in dissolved form in a suspension medium, where one of the reaction products is insoluble in the suspension medium, b) passing the reaction suspension through an elongated reaction zone so that the Reynolds number of the stream is less than 20,000 and c) separating off the insoluble reaction product formed. The process has the advantage that the insoluble reaction product is obtained in a readily filterable form.

    Abstract translation: 进行液/固反应的方法包括:a)制备其中第一反应物以悬浮形式存在的反应悬浮液,第二反应物以溶解形式存在于悬浮介质中,其中一种反应产物不溶于 悬浮介质,b)使反应悬浮液通过细长的反应区,使得流的雷诺数小于20,000,和c)分离形成的不溶性反应产物。 该方法具有以易于过滤的形式获得不溶性反应产物的优点。

    Process and apparatus for loading a particulate solid into a vertical tube
    8.
    发明申请
    Process and apparatus for loading a particulate solid into a vertical tube 有权
    将颗粒状固体装入垂直管的方法和装置

    公开(公告)号:US20040146457A1

    公开(公告)日:2004-07-29

    申请号:US10479672

    申请日:2003-12-04

    Abstract: A process is described in which an elastic fluid is contacted with a particulate solid. This comprises providing a substantially vertical elongate tubular containment zone (1) containing a charge of the particulate solid (5), the volume of the containment zone (1) being greater than the settled volume of the particulate solid (5). An upper retainer means (3) is mounted at the upper end of the containment zone (1), the upper retainer means (3) being permeable to the fluid but adapted to retain particulate solid (5) in the containment zone (1). A follower means (4) is movably mounted in the containment zone (1) beneath the charge of particulate solid (5) for movement upwardly from the lower end of the containment zone (1) upon upward flow of elastic fluid through the containment zone (1) at a rate beyond a threshold rate. In the process the elastic fluid is caused to flow upwardly through the containment zone (1) at a rate which is sufficient to cause particulate solid (5) to rise up towards the upper end of the containment zone and form a cushion of particulate solid (5) against the underside of the upper retainer means (3). This rate is in excess of the threshold rate so as to cause the follower means (4) to move upwardly until it abuts against the underside of the cushion of particulate solid (5). The invention also provides an apparatus suitable for carrying out such a process and a method of loading a particulate solid into a substantially vertical tube.

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