Method for producing an alkylene oxide
    91.
    发明授权
    Method for producing an alkylene oxide 有权
    烯化氧的制造方法

    公开(公告)号:US08871959B2

    公开(公告)日:2014-10-28

    申请号:US13122999

    申请日:2009-10-02

    Applicant: Markus Gitter

    Inventor: Markus Gitter

    CPC classification number: C07D301/10

    Abstract: The present invention relates to a continuous process for producing an alkylene oxide by direct oxidation of an alkene with oxygen by reacting a mixture comprising alkene and oxygen in the presence of a silver-comprising catalyst for a run time Δt(i), wherein during the oxidation, the catalyst is additionally contacted at least once with a further mixture comprising ethanol for a run time Δt(ii), wherein the run time Δt(i)>Δt(ii).

    Abstract translation: 本发明涉及通过在含银催化剂的存在下使包含烯烃和氧气的混合物在运行时间(D)(i)下反应直接氧化烯烃来生产烯化氧的连续方法,其中 在氧化期间,催化剂另外与包含乙醇的另外的混合物至少一次接触一次,持续运行时间和(d),其中运行时间和运行时间和(d)。

    PROCESS FOR REMOVING OXYGENATE FROM AN OLEFIN STREAM
    94.
    发明申请
    PROCESS FOR REMOVING OXYGENATE FROM AN OLEFIN STREAM 有权
    从OLEFIN STREAM去除氧气的方法

    公开(公告)号:US20140171665A1

    公开(公告)日:2014-06-19

    申请号:US14136272

    申请日:2013-12-20

    Abstract: The present invention provides a process for removing oxygenate from an olefin stream comprising oxygenate, comprising providing to an oxygenate recovery zone the olefin stream comprising oxygenate and a solvent comprising ethanol, treating the olefin stream comprising oxygenate with the solvent, and retrieving from the oxygenate recovery zone at least one oxygenate-depleted olefinic product stream comprising olefin and a spent solvent comprising at least part of the oxygenate.

    Abstract translation: 本发明提供从包含含氧化合物的烯烃流中除去含氧化合物的方法,包括向含氧物回收区提供包含含氧化合物和包含乙醇的溶剂的烯烃流,用溶剂处理包含含氧化合物的烯烃流,并从含氧化合物回收 区域包含烯烃和包含至少部分含氧化合物的废溶剂的至少一种含氧化合物贫化烯烃产物流。

    METHOD OF SYNTHESIS OF SUBSTITUTED HEXITOLS SUCH AS DIANHYDROGALACTITOL

    公开(公告)号:US20140155638A1

    公开(公告)日:2014-06-05

    申请号:US13933751

    申请日:2013-07-02

    Inventor: DENNIS M. BROWN

    CPC classification number: C07D301/02 C07D301/03 C07D301/26

    Abstract: The present invention provides an efficient method of synthesizing and purifying dianhydrohexitols such as dianhydrogalactitol. In general, as applied to dianhydrogalactitol, the method comprises: (1) reacting dulcitol with a concentrated solution of hydrobromic acid at a temperature of about 80° C. to produce dibromogalactitol; (2) reacting the dibromogalactitol with potassium carbonate in t-butanol to produce dianhydrogalactitol; and (3) purifying the dianhydrogalactitol using a slurry of ethyl ether to produce purified dianhydrogalactitol. Another method produces dianhydrogalactitol from dulcitol; this method comprises: (1) reacting dulcitol with a reactant to convert the 1,6-hydroxy groups of dulcitol to an effective leaving group to generate an intermediate; and (2) reacting the intermediate with an inorganic weak base to produce dianhydrogalactitol through an intramolecular SN2 reaction. Other methods for the synthesis of dianhydrogalactitol from dulcitol are described.

    Use of structured catalyst beds for preparing ethylene oxide
    97.
    发明授权
    Use of structured catalyst beds for preparing ethylene oxide 有权
    使用结构化催化剂床制备环氧乙烷

    公开(公告)号:US08580982B2

    公开(公告)日:2013-11-12

    申请号:US13376879

    申请日:2010-06-09

    CPC classification number: C07D301/10

    Abstract: The present invention relates to a process for preparing ethylene oxide by reaction of ethylene with oxygen in the presence of at least one silver-comprising catalyst, wherein the reaction takes place in a reactor which has a catalyst packed bed having at least two zones (i) and (ii) and the silver content of the catalyst in zone (i) is lower than the silver content of the catalyst in zone (ii). The catalyst packed bed preferably has a further zone (a) with which the reaction mixture comes into contact before the zones (i) and (ii). According to the invention, the silver content of the catalyst in the zone (a) is higher than the silver content of the catalyst in zone (i).

    Abstract translation: 本发明涉及通过乙烯与氧在至少一种含银催化剂存在下反应来制备环氧乙烷的方法,其中该反应在具有至少两个区域的催化剂填充床(i )和(ii),并且(i)区域中的催化剂的银含量低于区域(ii)中的催化剂的银含量。 催化剂填充床优选具有另外的区域(a),反应混合物在区域(i)和(ii)之前与其接触。 根据本发明,区域(a)中催化剂的银含量高于区域(i)中催化剂的银含量。

    METHOD FOR START-UP OF AN OXYGENATE-TO-OLEFIN PROCESS
    100.
    发明申请
    METHOD FOR START-UP OF AN OXYGENATE-TO-OLEFIN PROCESS 失效
    启动氧化过程的方法

    公开(公告)号:US20130245294A1

    公开(公告)日:2013-09-19

    申请号:US13606308

    申请日:2012-09-07

    Abstract: The present invention provides a method for start-up of an Oxygenate-to-Olefins process, which process comprises the steps: a) providing an oxygenate-comprising feedstock to an Oxygenate-to-Olefins reaction zone and contacting the feedstock with a zeolite-comprising catalyst at a temperature in the range of from 450 to 700° C. ° C., to obtain an reaction product containing olefins; b) separating the reaction product obtained in step a) in at least a product fraction containing ethylene and/or propylene and a product fraction containing C4+ olefins; c) recycling at least part of the C4+ olefins in the product fraction containing C4+ olefins to the Oxygenate-to-Olefins reaction zone in step (a), characterised in that upon start-up the oxygenate-comprising feedstock initially comprises a first amount of externally supplied tert-alkyl ether and subsequently the amount of externally supplied tert-alkyl ether in the oxygenate-comprising feedstock is reduced.

    Abstract translation: 本发明提供了一种启动氧化烯 - 烯烃工艺的方法,该方法包括以下步骤:a)将含氧化合物的原料提供到氧化烯 - 烯烃反应区,并使原料与沸石 - 在450-700℃的温度范围内包含催化剂,得到含有烯烃的反应产物; b)将至少含有乙烯和/或丙烯的产物级分和含有C4 +烯烃的产物级分的步骤a)中获得的反应产物分离; c)在步骤(a)中将至少部分含有C4 +烯烃的产物级分中的C4 +烯烃再循环到步骤(a)中的氧化烯 - 烯烃反应区,其特征在于,在启动时,含氧化合物原料最初包含第一量 外部供应的叔烷基醚,随后在含氧化合物的原料中外部供应的叔烷基醚的量减少。

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