Gas distribution in oxidation reactions

    公开(公告)号:US10105668B2

    公开(公告)日:2018-10-23

    申请号:US15577030

    申请日:2016-06-03

    Abstract: Systems, methods, and apparatus for distribution of oxygen-containing gas within a gas-liquid oxidation reaction are provided herein. The invention is particularly suited for oxidation of liquid-phase organic reactants with oxidizing gas, such as the oxidation of cyclohexylbenzene to cyclohexylbenzene hydroperoxide using an oxygen-containing gas. The oxygen-containing gas is distributed through a gas distributor and into a liquid-phase reaction medium within an oxidation reactor. In some aspects, this achieves a high degree of uniformity of oxygen concentration within the liquid-phase reaction medium. The gas distributor is disposed within a lower portion of the reactor, and may comprise a network of conduits in fluid communication with each other, which are arranged within a plane that is substantially parallel to a bottom surface of the reactor. A plurality of orifices are disposed on the conduits, such that oxygen-containing gas flows through the conduits and into the liquid-phase reaction medium via the orifices.

    Process for Producing Phenol
    7.
    发明申请
    Process for Producing Phenol 有权
    生产苯酚的方法

    公开(公告)号:US20160075623A1

    公开(公告)日:2016-03-17

    申请号:US14787862

    申请日:2014-04-09

    Abstract: In a process for producing phenol and cyclohexanone, reaction components comprising cyclohexylbenzene hydroperoxide and an acid catalyst are supplied to a cleavage reaction zone, mixed under mixing conditions effective to combine the reaction components into a reaction mixture and at least part of the cyclohexylbenzene hydroperoxide in the reaction mixture is converted under cleavage conditions to into phenol and cyclohexanone; and a cleavage effluent is recovered from the cleavage reaction zone. The cleavage and mixing conditions are controlled such that the ratio tR/tM is at least 10, where tR is the half-life of cyclohexylbenzene hydroperoxide under the cleavage conditions and tM is the time required after injection of a tracer material into the reaction mixture under the mixing conditions for at least 95% by volume of the entire reaction mixture to attain at least 95% of the volume-averaged tracer material concentration.

    Abstract translation: 在生产酚和环己酮的方法中,将包含环己基苯氢过氧化物和酸催化剂的反应组分供应至裂解反应区,在有效将反应组分混合成反应混合物和至少部分环己基苯氢过氧化物的混合条件下混合, 在裂解条件下将反应混合物转化成苯酚和环己酮; 并从裂解反应区回收裂解流出物。 控制裂解和混合条件使得tR / tM的比例至少为10,其中t R是在切割条件下环己基苯氢过氧化物的半衰期,tM是将示踪材料注入反应混合物中所需的时间 整个反应混合物的至少95体积%的混合条件达到体积平均示踪剂材料浓度的至少95%。

    Oxidation of hydrocarbons
    9.
    发明授权
    Oxidation of hydrocarbons 有权
    碳氢化合物的氧化

    公开(公告)号:US09238605B2

    公开(公告)日:2016-01-19

    申请号:US14421232

    申请日:2013-09-05

    Abstract: A process for oxidizing a first hydrocarbon to a corresponding first oxygenate by feeding a first feedstock comprising the first hydrocarbon into an oxidation reactor, contacting the reaction medium with a gas stream comprising O2 in the oxidation reactor, and supplying a hydroperoxide additive to the oxidation reactor. By including the hydroperoxide additive in the reaction medium, foaming at and/or close to the beginning of the oxidation reaction can be significantly reduced.

    Abstract translation: 通过将包含第一烃的第一原料进料到氧化反应器中将第一烃氧化成相应的第一含氧化合物的方法,使反应介质与氧化反应器中包含O 2的气流接触,并向氢氧化反应器供应氢过氧化物添加剂 。 通过将氢过氧化物添加剂包括在反应介质中,可以显着降低在氧化反应开始时和/或接近氧化反应开始的发泡。

    Light olefin recovery from plastic waste pyrolysis

    公开(公告)号:US12065616B2

    公开(公告)日:2024-08-20

    申请号:US17595344

    申请日:2020-06-12

    CPC classification number: C10G1/10 C10B49/22 C10B53/07 C10G9/36

    Abstract: Systems and methods are provided for integration of a reactor for polyolefin pyrolysis with the effluent processing train for a steam cracker. The polyolefins can correspond to, for example, polyolefins in plastic waste. Integrating a process for polyolefin pyrolysis with a steam cracker processing train can allow a mixture of polymers to be converted to monomer units while reducing or minimizing costs and/or equipment footprint. This can allow for direct conversion of polyolefins to the light olefin monomers in high yield while significantly lowering capital and energy usage due to integration with a steam cracking process train. The integration can be enabled in part by selecting feeds with appropriate mixtures of various polymer types and/or by limiting the volume of the plastic waste pyrolysis product relative to the volume from the steam cracker(s) in the steam cracking process train. By selecting plastic waste and/or other polyolefin sources with an appropriate mixture of polyolefins as the feedstock, the resulting polyolefin pyrolysis product can be separated in a steam cracking process train to produce separate fractions for various polymer grade small olefin products.

Patent Agency Ranking