Process intensification in hydroprocessing

    公开(公告)号:US10604708B2

    公开(公告)日:2020-03-31

    申请号:US15912212

    申请日:2018-03-05

    IPC分类号: C10G65/04

    摘要: A multi-stage hydrotreating process obtains ultra-low sulfur diesel boiling range hydrocarbon having less than 10 ppm sulfur with elimination of external hot high pressure separator and avoids the formation of recombinant mercaptans by removing excess hydrogen sulfide formed during hydroprocessing reaction. The process includes mixing a diesel boiling range hydrocarbon feedstock with hydrogen and sending to the first predominantly liquid phase hydroprocessing reaction stage. Effluent from the first hydroprocessing reaction stage is sent to first separator zone of open and empty space in the upper part of the second hydroprocessing reaction stage to flash off the dissolved reaction products hydrogen sulfide and ammonia. Liquid part of the effluent of first hydroprocessing reaction stage is passed to the second predominantly liquid phase hydroprocessing reaction stage. The process is repeated until the liquid product sulfur level of less than 10 ppm is attained and the liquid product is sent to further processing.

    Ziegler-natta catalyst systems comprising a 1,2-phenylenedioate as internal donor and process for preparing the same
    9.
    发明授权
    Ziegler-natta catalyst systems comprising a 1,2-phenylenedioate as internal donor and process for preparing the same 有权
    齐格勒 - 纳塔催化剂体系,其包含1,2-亚苯基二酸盐作为内给体及其制备方法

    公开(公告)号:US09593172B2

    公开(公告)日:2017-03-14

    申请号:US14414401

    申请日:2013-07-12

    IPC分类号: C08F4/649 C08F10/00

    摘要: A catalyst composition for use as precursor for Ziegler-Natta catalyst system, said catalyst composition comprising a combination of magnesium moiety, titanium moiety and an internal donor containing at least one 1,2-phenylenedioate compound of structure (A). Also, the present invention provides a process for preparing the aforesaid catalyst composition. Further, the present invention provides a Ziegler-Natta catalyst system incorporating the aforesaid catalyst composition and a method for polymerizing and/or copolymerizing olefins using the Ziegler-Natta catalyst system.

    摘要翻译: 一种用作齐格勒 - 纳塔催化剂体系的前体的催化剂组合物,所述催化剂组合物包含镁部分,钛部分和含有至少一种结构(A)的1,2-亚苯基二酸酯化合物的内给体的组合。 另外,本发明提供了制备上述催化剂组合物的方法。 此外,本发明提供了使用齐格勒 - 纳塔催化剂体系结合上述催化剂组合物的齐格勒 - 纳塔催化剂体系和使烯烃聚合和/或共聚的方法。