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    Oligomerization of ethene in supercritical mode
    3.
    发明授权
    Oligomerization of ethene in supercritical mode 有权

    公开(公告)号：US10189755B2

    公开(公告)日：2019-01-29

    申请号：US15605170

    申请日：2017-05-25

    申请人： Evonik Degussa GmbH

    发明人： Helene Reeker ,  Guido Stochniol ,  Dietrich Maschmeyer ,  Stephan Peitz ,  Jörg Schallenberg

    IPC分类号： C07C2/02 ,  C07C2/24 ,  B01J21/06 ,  B01J21/12 ,  B01J21/20 ,  B01J23/755 ,  B01J23/94 ,  B01J38/56 ,  B01J38/00

    摘要： The disclosure describes the oligomerization of supercritical ethene. An essential aspect of the invention is that of mixing ethene with an inert medium and setting the conditions in the reaction such that both ethene and the inert medium are supercritical. This is because the solubility for ethene in the inert medium is greater in the supercritical state, such that more ethene is dissolved in the supercritical inert medium than in a liquid solvent. The process regime in the supercritical state therefore enables the use of a much higher proportion of ethene in a homogeneous mixture of ethene and inert medium than is possible on the basis of the thermodynamic solubility restriction in a purely liquid hydrocarbon stream. In this way, the space-time yield is distinctly enhanced. Since a greater amount of ethene can be passed into the reactor, it is possible as a result to better exploit the apparatus volume compared to a liquid phase process. The inert medium used may, for example, be isobutane.

    Combined preparation of butene and octene from ethene
    10.
    发明授权
    Combined preparation of butene and octene from ethene 有权

    公开(公告)号：US10407366B2

    公开(公告)日：2019-09-10

    申请号：US15000807

    申请日：2016-01-19

    申请人： Evonik Degussa GmbH

    发明人： Guido Stochniol ,  Helene Reeker ,  Stephan Peitz ,  Dietrich Maschmeyer ,  Joerg Schallenberg ,  Horst-Werner Zanthoff ,  Harald Haeger

    IPC分类号： C07C2/24 ,  C07C7/04 ,  C07C2/10

    摘要： A process for the combined preparation of a butene and an octene from ethene, proceeds by: a) providing a solvent having a boiling point or boiling range above the boiling points of the butenes and below the boiling points of the octenes and wherein the solvent is an inert solvent or is hexene alone or is hexene admixed with pentane or hexane or heptane or is a mixture of pentane, hexane, and heptane; b) providing a first feed mixture containing at least the solvent and ethene dissolved therein; c) providing a second feed mixture containing at least hexene, the solvent and also ethene dissolved in the solvent and/or in the hexene; d) transferring the first feed mixture into a first synthesis and the second feed mixture into a second synthesis, wherein the first and second syntheses are physically separated from one another; e) oligomerizing of at least part of the ethene present in the first feed mixture in the presence of a first heterogeneous catalyst and in the presence of the solvent in the first synthesis to give a first reaction mixture comprising at least the solvent, butene and hexene; f) separating a butene-containing low boiler fraction from the first reaction mixture or from a stream based on the first reaction mixture; g) separating an intermediate boiler fraction containing hexene and the solvent from the first reaction mixture or from a stream based on the first reaction mixture; h) using at least part of the intermediate boiler fraction in the course of providing the second feed mixture; and i) reacting at least part of the ethene present in the second feed mixture with at least part of the hexene present in the second feed mixture in the presence of a second heterogeneous catalyst and in the presence of the solvent in the second synthesis to give a second reaction mixture comprising at least octene and the solvent.