Process for feeding ethylene to polymerization reactors
    22.
    发明授权
    Process for feeding ethylene to polymerization reactors 有权
    将乙烯供给聚合反应器的方法

    公开(公告)号:US08399586B2

    公开(公告)日:2013-03-19

    申请号:US12584338

    申请日:2009-09-03

    摘要: A process for feeding ethylene into a polymerization system includes providing a low-pressure ethylene stream, one or more low-pressure C3 to C20 monomer streams, an optional low-pressure inert solvent/diluent stream, and one or more reactors; metering the low-pressure ethylene stream, the one or more low-pressure C3 to C20 monomer streams, and the optional low-pressure inert solvent/diluent stream; blending the metered low-pressure ethylene stream, the metered one or more low-pressure C3 to C20 monomer streams, and the metered low-pressure optional inert solvent/diluent stream to form an ethylene-carrying low-pressure blended liquid feed stream; pressurizing the ethylene-carrying low-pressure blended liquid feed stream to the polymerization system pressure with one or more high-pressure pumps to thrm an ethylene-carrying high-pressure blended reactor feed stream; and feeding the ethylene-carrying high-pressure blended reactor feed stream to the one or more reactors.

    摘要翻译: 将乙烯进料到聚合体系中的方法包括提供低压乙烯流,一种或多种低压C3至C20单体流,任选的低压惰性溶剂/稀释剂流和一个或多个反应器; 计量低压乙烯流,一个或多个低压C3至C20单体流和任选的低压惰性溶剂/稀释剂流; 混合计量的低压乙烯流,计量的一个或多个低压C3至C20单体流和计量的低压可选惰性溶剂/稀释剂流,以形成携带乙烯的低压混合液体进料流; 使用一个或多个高压泵将携带乙烯的低压混合液体进料流加压至聚合系统压力以加入携带乙烯的高压共混反应器进料流; 并将含乙烯的高压共混反应器进料流输送到一个或多个反应器。

    Reforming process for manufacture of para-xylene
    27.
    发明授权
    Reforming process for manufacture of para-xylene 失效
    对二甲苯制造改造工艺

    公开(公告)号:US06653518B2

    公开(公告)日:2003-11-25

    申请号:US09882914

    申请日:2001-06-15

    IPC分类号: C07C245

    摘要: A process for selectively producing para-xylene from a feedstock enriched in C8 isoalkanes and/or isoalkenes is disclosed. The feed is contacted with Group VIII metal loaded molecular sieve catalyst of low acidity under dehydrocyclization conditions wherein the molecular sieve has a channel size ranging from about 5-8 Angstroms and a 10 to 12 membered ring structure containing at least two elements selected from the group consisting of Si, Al, P, Ge, Ga and Ti.

    摘要翻译: 公开了从富含C8异烷烃和/或异烯烃的原料中选择性地生产对二甲苯的方法。 在脱氢环化条件下使进料与低酸度的VIII族金属负载分子筛催化剂接触,其中分子筛具有约5-8埃的通道尺寸和含有至少两种选自下组的元素的10至12元环结构 由Si,Al,P,Ge,Ga和Ti组成。