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    PROCESS FOR THE EPOXIDATION OF AN OLEFIN
    11.
    发明申请
    PROCESS FOR THE EPOXIDATION OF AN OLEFIN 审中-公开

    公开(公告)号：US20170210718A1

    公开(公告)日：2017-07-27

    申请号：US15329626

    申请日：2015-07-23

    申请人： Evonik Degussa GmbH

    发明人： Guido Stochniol ,  Wolfgang WÖLL ,  Franz SCHMIDT

    IPC分类号： C07D301/12 ,  C07D303/04

    CPC分类号： C07D301/12 ,  C07D303/04

    摘要： In a process for the epoxidation of an olefin, where a mixture comprising olefin, hydrogen peroxide, water and methanol with a weight ratio of water to methanol of less than 1 is passed through a catalyst fixed bed comprising a shaped titanium silicalite catalyst, catalyst breakage is reduced by conditioning the dry catalyst with at least one conditioning liquid comprising water and from 25 to 45% by weight methanol.

    Superabsorbent polymers and methods of making the same
    12.
    发明授权
    Superabsorbent polymers and methods of making the same 有权
    超吸收性聚合物及其制造方法

    公开(公告)号：US08895683B2

    公开(公告)日：2014-11-25

    申请号：US13896458

    申请日：2013-05-17

    申请人： Evonik Degussa GmbH

    发明人： Franz-Felix Kuppinger ,  Axel Hengstermann ,  Guido Stochniol ,  Gunther Bub ,  Jurgen Mosler ,  Andreas Sabbagh

    IPC分类号： C08F20/06 ,  C08F120/06 ,  C07C51/377 ,  C07C51/43

    CPC分类号： C08F120/06 ,  C07C51/377 ,  C07C51/43 ,  Y02P20/127 ,  C07C57/04

    摘要： In one aspect, a process for the preparation of a superabsorbent polymer is described herein. In some embodiments, the process comprises (I) preparing acrylic acid, wherein the process comprises (a1) provision of a fluid F1 having a composition comprising from about 5 to about 20 wt. % of hydroxypropionic acid, salts thereof, or mixtures thereof; from about 0.1 to about 5 wt. % of inorganic salts; from about 0.1 to about 30 wt. % of organic compounds which differ from hydroxypropionic acid; from 0 to about 50 wt. % of solids; and from about 20 to about 90 wt. % of water; (a2) dehydration of said hydroxypropionic acid to give a fluid F2 containing acrylic acid; and (a3) purification of said fluid F2 to give a purified acrylic acid phase comprising acrylic acid having a purity of at least 70 wt. %; and (II) polymerizing the acrylic acid of (I) to form a superabsorbent polymer.

    摘要翻译： 一方面，本文描述了制备超吸收性聚合物的方法。 在一些实施方案中，该方法包括（I）制备丙烯酸，其中该方法包括（a1）提供具有包含约5至约20wt。 ％的羟基丙酸，其盐或其混合物; 约0.1至约5wt。 ％的无机盐; 约0.1至约30wt。 ％羟基丙酸不同的有机化合物的％; 0至约50wt。 ％的固体; 和约20至约90wt。 ％的水; （a2）所述羟基丙酸的脱水，得到含有丙烯酸的流体F2; 和（a3）纯化所述流体F2以得到包含纯度至少为70重量％的丙烯酸的纯化丙烯酸相。 ％; 和（II）使（I）的丙烯酸聚合以形成超吸收性聚合物。

    Dehydrogenation of olefin-rich hydrocarbon mixtures
    14.
    发明授权
    Dehydrogenation of olefin-rich hydrocarbon mixtures 有权

    公开(公告)号：US10221110B2

    公开(公告)日：2019-03-05

    申请号：US15827193

    申请日：2017-11-30

    申请人： EVONIK DEGUSSA GMBH

    发明人： Guido Stochniol ,  Robert Franke

    IPC分类号： C07C5/333 ,  C07C5/52 ,  C07C11/02 ,  C10G35/085

    摘要： A process for dehydrating alkanes in which such feedstock mixtures may be used having a high proportion of olefins, i.e. approximately 1% by weight to 10% by weight. Specifically, alkenes having two to five carbon atoms are generated from alkanes having the same carbon length where the number of carbon atoms not change during by the dehydrogenation. The process is intended to be feasible on an industrial scale. A basic concept of the invention consists of hydrogenating alkenes present in the feedstock to the corresponding alkanes before they come in contact with the dehydrogenation catalyst. This avoids an undesired coke deposit. The hydrogenation is effected by minimal addition of hydrogen (80% to 120% of the stoichiometrically required amount). The hydrogenation is effected either over a dehydrogenation catalyst, or over the dehydrogenation catalyst itself.