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    Method for recovery of ethylene oxide
    1.
    发明授权
    Method for recovery of ethylene oxide 有权

    公开(公告)号：US11932615B2

    公开(公告)日：2024-03-19

    申请号：US17059556

    申请日：2019-05-14

    申请人： Brian Ozero

    发明人： Brian Ozero

    IPC分类号： C07D301/32 ,  B01D1/30 ,  B01D3/38 ,  B01D53/14

    CPC分类号： C07D301/32 ,  B01D1/305 ,  B01D3/38 ,  B01D53/1406 ,  B01D53/1418 ,  B01D53/1487 ,  B01D53/1493 ,  B01D2252/103

    摘要： Ethylene oxide purification by quenching and washing ethylene oxide reactor effluent prior to passing the gaseous ethylene oxide-containing stream to an ethylene oxide absorber to form a dilute aqueous ethylene oxide and carbon dioxide solution and thereafter stripping that solution in an EO stripper to produce a gaseous ethylene oxide and carbon dioxide-containing overhead vapor which is then passed to a reabsorber wherein the ethylene oxide and part of the carbon dioxide vapors are absorbed to form an aqueous reabsorbate solution from which carbon dioxide is removed to produce an ethylene oxide-containing solution is improved by passing an impurities-containing liquid bleed stream obtained from the quench wash to a second, small quench bleed stripper where steam and carbon dioxide are added and gaseous overhead from that quench bleed stripper is passed to the reabsorber for recovery of the EO and removal of formaldehyde and other impurities.

    Process for making propene oxide
    2.
    发明授权
    Process for making propene oxide 有权

    公开(公告)号：US11873285B2

    公开(公告)日：2024-01-16

    申请号：US18046150

    申请日：2022-10-12

    申请人： Evonik Operations GmbH ,  thyssenkrupp Uhde GmbH

    发明人： Maik Bernhard ,  Juliette Halli ,  Marc Brendel ,  Sören Götz ,  Hans-Christian Dietz

    IPC分类号： C07D301/12 ,  C07D301/32 ,  C07D303/04

    CPC分类号： C07D301/12 ,  C07D301/32 ,  C07D303/04

    摘要： A process for making propene oxide involves reacting propene with hydrogen peroxide in the presence of methanol, a titanium zeolite epoxidation catalyst, and nitrogen containing compounds present in an amount of from 100 to 3000 mg/kg of hydrogen peroxide. Non-reacted propene is separated from the reaction mixture; the propene depleted reaction mixture is continuously distilled in a distillation column providing an overhead product stream containing propene oxide and methanol and a bottoms product stream; and propene oxide is separated from the overhead product stream. An acid is added to the propane depleted reaction mixture and/or to the distillation column at the same level or above the feed point for the propene depleted reaction mixture and/or contacted to the feed to the distillation column to provide an apparent pH in the bottoms product stream of from 3 to 4.5, which reduces the nitrogen content of the separated propene oxide.

    ALKYLENE OXIDE SEPARATION SYSTEMS, METHODS, AND APPARATUSES
    5.
    发明申请
    ALKYLENE OXIDE SEPARATION SYSTEMS, METHODS, AND APPARATUSES 审中-公开

    公开(公告)号：US20170137394A1

    公开(公告)日：2017-05-18

    申请号：US15419713

    申请日：2017-01-30

    申请人： Lyondell Chemical Technology, L.P.

    发明人： Xiangmin Li ,  Te Chang ,  David W. Leyshon ,  Walter S. Dubner ,  Elizabeth I. Ross-Medgaarden

    IPC分类号： C07D301/32 ,  B01D11/04 ,  B01D3/14

    CPC分类号： C07D301/32 ,  B01D3/143 ,  B01D11/0488 ,  B01D11/0492 ,  B01D17/0214

    摘要： A propylene oxide separation system that comprises a distillation column, a decanter, and water wash system. The distillation column is configured to receive a crude propylene oxide stream, discharge an impurity stream that comprises methanol and water, and discharge a bottoms stream that comprises a majority of the propylene oxide entering in the crude propylene oxide stream. The decanter is configured to receive at least a portion of the impurity stream and a hydrocarbon solvent to provide for formation in the decanter of an organic phase and an aqueous phase. The organic phase comprises propylene oxide and hydrocarbon solvent, and is sent to the distillation column. The aqueous phase comprises a majority weight percent of the methanol and the water entering in the impurity stream. The water wash system is configured to receive and purge the aqueous phase from the propylene oxide separation system.

    PROCESS FOR FORMING PROPYLENE OXIDE FROM OXIDATION OF METHYL BENZYL ALCOHOL
    7.
    发明申请
    PROCESS FOR FORMING PROPYLENE OXIDE FROM OXIDATION OF METHYL BENZYL ALCOHOL 有权
    由甲基苄基醇氧化形成丙烯氧化物的方法

    公开(公告)号：US20160297783A1

    公开(公告)日：2016-10-13

    申请号：US15093370

    申请日：2016-04-07

    申请人： Lyondell Chemical Technology, L.P.

    发明人： Vu A. Dang ,  David W. Leyshon ,  Sandor Nagy ,  Roger A. Grey

    IPC分类号： C07D301/12 ,  C07D301/36 ,  B01J29/70 ,  C07D301/32

    CPC分类号： C07D301/12 ,  B01J29/7088 ,  C07D301/32 ,  C07D301/36 ,  C07D303/04 ,  Y02P20/52

    摘要： The present disclosure relates to a method of preparing propylene oxide comprising the steps: (a) oxidizing alpha-methylbenzyl alcohol with air to form a first reaction mixture comprising hydrogen peroxide and acetophenone; (b) reacting propylene with the first reaction mixture in the presence of a catalyst to form a second reaction mixture comprising propylene oxide; (c) separating the propylene oxide from the second reaction mixture to form a third reaction mixture; (d) heating the third reaction mixture to decompose hydrogen peroxide, whereby a fourth reaction mixture is formed; (e) hydrogenating the acetophenone in the fourth reaction mixture with hydrogen to form a fifth reaction mixture comprising alpha-methylbenzyl alcohol; and (f) separating alpha-methylbenzyl alcohol from the fifth reaction mixture and returning the methyl benzyl alcohol to step (a).

    ASSEMBLY FOR PRODUCING ALKYLENE OXIDES AND GLYCOL ETHERS
    8.
    发明申请
    ASSEMBLY FOR PRODUCING ALKYLENE OXIDES AND GLYCOL ETHERS 有权
    用于生产烷基氧化物和甘油的组合物

    公开(公告)号：US20160159761A1

    公开(公告)日：2016-06-09

    申请号：US15043368

    申请日：2016-02-12

    申请人： DOW GLOBAL TECHNOLOGIES LLC

    发明人： Tina L. Arrowood ,  Derrick W. Flick ,  John F. Ackford

    IPC分类号： C07D301/32 ,  B01J19/24 ,  C07D301/12

    CPC分类号： C07D301/32 ,  B01J19/245 ,  B01J2219/24 ,  C07D301/12 ,  C07D301/36

    摘要： There is provided a manufacturing assembly for the production of an alkylene oxide and a stream of glycol ethers. The manufacturing assembly produces the alkylene oxide and stream of glycol without the use of equipment for separating substantially all of the alkyl alcohol from the alkylene oxide product stream. Thus, the use of additional pieces of equipment can be avoided, or the equipment required to effectuate any required further separation and/or purification may be smaller and/or cheaper to purchase and/or operate.

    摘要翻译： 提供了用于生产环氧烷和二醇醚流的制造组件。 制造组件产生环氧烷和二醇流，而不使用用于从烯化氧产物流中分离基本上所有烷基醇的设备。 因此，可以避免使用额外的设备，或者实现任何所需的进一步分离和/或净化所需的设备可能更小和/或更便宜地购买和/或操作。

    Epoxidation process
    9.
    发明授权
    Epoxidation process 有权
    环氧化工艺

    公开(公告)号：US09096561B2

    公开(公告)日：2015-08-04

    申请号：US14253366

    申请日：2014-04-15

    申请人： Scientific Design Company, Inc.

    发明人： Mansoor Husain

    IPC分类号： C07D301/06

    CPC分类号： C07D301/06 ,  C07D301/04 ,  C07D301/32

    摘要： A method for the oxidation of ethylene to form ethylene oxide is provided that includes passing an aqueous stream through a guard bed and one or more ion exchange treatment beds. The guard bed and the aqueous stream contain from about 0.2 to 20 wt % ethylene glycol. The guard bed contains a cross-linked polystyrene resin, partially functionalized with quaternary ammonium functional groups and the resin has a surface area of greater than 400 m2/g.

    摘要翻译： 提供了一种乙烯氧化形成环氧乙烷的方法，其包括使水流通过保护床和一个或多个离子交换处理床。 保护床和含水流含有约0.2-20重量％的乙二醇。 保护床含有交联聚苯乙烯树脂，部分用季铵官能团官能化，树脂的表面积大于400m2 / g。