Olefin epoxidation process and a catalyst for use in the process
    25.
    发明授权
    Olefin epoxidation process and a catalyst for use in the process 有权
    烯烃环氧化方法和用于该方法的催化剂

    公开(公告)号:US07932407B2

    公开(公告)日:2011-04-26

    申请号:US10816080

    申请日:2004-04-01

    IPC分类号: C07D301/10 C07D301/03

    摘要: A process for the epoxidation of an olefin, which process comprises reacting a feed comprising an olefin, oxygen and an organic halide, in the presence of a catalyst comprising silver and rhenium deposited on a carrier, wherein the catalyst comprises rhenium in a quantity of at most 1.5 mmole/kg, relative to the weight of the catalyst, and at most 0.0015 mmole/m2, relative to the surface area of the carrier, and in which process the reaction temperature is increased to at least partly reduce the effect of loss of activity of the catalyst while the organic halide is present in a relative quantity Q which is maintained constant as defined herein.

    摘要翻译: 一种烯烃环氧化方法,该方法包括在包含沉积在载体上的银和铼的催化剂存在下使包含烯烃,氧和有机卤化物的进料反应,其中催化剂包含一定量的铼 相对于催化剂的重量,最多为1.5mmol / kg,相对于载体的表面积为至多0.0015mmole / m 2,并且在该过程中,反应温度升高至少部分降低损失的影响 有机卤化物存在的相对量Q保持恒定的催化剂的活性,如本文所定义的。

    Method for reusing rhenium from a donor spent epoxidation catalyst
    26.
    发明授权
    Method for reusing rhenium from a donor spent epoxidation catalyst 有权
    用于再利用来自供体废环氧化催化剂的铼的方法

    公开(公告)号:US07704908B2

    公开(公告)日:2010-04-27

    申请号:US11613862

    申请日:2006-12-20

    IPC分类号: B01J38/48

    摘要: A method for reusing rhenium from a donor spent epoxidation catalyst, the method comprising: providing a donor comprising spent epoxidation catalyst comprising rhenium, the donor having a cumulative alkylene oxide production of 0.16 kT/m3 of the spent epoxidation catalyst or more; contacting the donor with an aqueous liquid to produce rhenium-depleted donor and aqueous extract comprising extracted rhenium; separating the aqueous extract and the rhenium-depleted donor; and, using the extracted rhenium as a source of rhenium in a subsequent process.

    摘要翻译: 一种用于从施主耗尽的环氧化催化剂重新使用铼的方法,所述方法包括:提供包含铼的废环氧化催化剂的供体,所述供体具有0.16kT / m 3的废环氧化催化剂或更多的累积环氧烷产生量; 使供体与含水液体接触以产生铼耗尽的供体和包含萃取的铼的含水萃取物; 分离水提取物和铼耗尽的供体; 并且在随后的方法中使用提取的铼作为铼源。