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    Process for Transitioning Between Low Percentage Chrome and High Percentage Chrome Catalysts
    3.
    发明申请
    Process for Transitioning Between Low Percentage Chrome and High Percentage Chrome Catalysts 审中-公开

    公开(公告)号：US20180162969A1

    公开(公告)日：2018-06-14

    申请号：US15377684

    申请日：2016-12-13

    申请人： Chevron Phillips Chemical Company LP

    发明人： Jeff S. LOWELL ,  Daniel M. HASENBERG

    IPC分类号： C08F110/02

    CPC分类号： C08F110/02

    摘要： A method of transitioning from a first catalyst to a second catalyst in a gas phase fluidized bed reactor comprising continuously feeding the first catalyst and a recycle stream comprising olefin monomer to the reactor; wherein the monomer contacts the first catalyst in the fluidized bed and polymerizes; wherein the reactor is operating in condensing mode (withdrawing a gaseous stream comprising unreacted monomer from the reactor, cooling the gaseous stream to condense a portion thereof, and contacting the cooled gaseous stream with fresh monomer to form the recycle stream); and wherein a liquid phase of the recycle stream evaporates within the fluidized bed; discontinuing the first catalyst to the reactor while continuing to feed the recycle stream; maintaining the condensing mode in reactor at >3 wt. % liquid phase in recycle stream while no fresh catalyst is introduced to reactor; and introducing the second catalyst to the reactor operating in condensing mode.

    Beta-Mercaptoethanol Synthesis
    4.
    发明申请
    Beta-Mercaptoethanol Synthesis 审中-公开

    公开(公告)号：US20170291873A1

    公开(公告)日：2017-10-12

    申请号：US15632994

    申请日：2017-06-26

    申请人： Chevron Phillips Chemical Company LP

    发明人： Daniel M. HASENBERG ,  Alex PAUWELS

    IPC分类号： C07C319/04 ,  C07C323/12

    摘要： A process includes reacting, in a reactor having a fixed bed containing a solid catalyst which contains a heterogeneous ion exchange resin, hydrogen sulfide and ethylene oxide in the presence of the solid catalyst to yield a reaction product which contains beta-mercaptoethanol. A reactor system includes the reactor, an ethylene oxide stream, a hydrogen sulfide stream, a fixed bed containing the solid catalyst placed in the reactor, and an effluent stream containing the reaction product. During steady state operation of the reactor in the process and the reactor system, the hydrogen sulfide and the ethylene oxide are present in a mole ratio in a range of about 9:1 to about 20:1.

    System and Method for Containing an Emission of Sulfur Trioxide
    5.
    发明申请
    System and Method for Containing an Emission of Sulfur Trioxide 审中-公开

    公开(公告)号：US20180141815A1

    公开(公告)日：2018-05-24

    申请号：US15873227

    申请日：2018-01-17

    申请人： Chevron Phillips Chemical Company LP

    发明人： Daniel M. HASENBERG

    IPC分类号： C01B17/69

    CPC分类号： C01B17/69 ,  B01D53/1481 ,  B01D2252/2056 ,  B01D2257/302

    摘要： A system for containing an emission of sulfur trioxide, the system comprising a first pressurized vessel, the first pressurized vessel containing sulfur trioxide, a relief vessel containing a volume of a solvent solution, wherein the solvent solution comprises sulfolane, and a first relief conduit providing a first route of fluid communication between the first pressurized vessel and the relief vessel. A method for containing an emission of sulfur trioxide, the method comprising routing a first relief conduit so as to provide a first route of fluid communication between a first pressurized vessel and a relief vessel, wherein the first pressurized vessel contains sulfur trioxide, wherein the relief vessel contains a volume of a solvent solution, and wherein the solvent solution comprises sulfolane.

    System and Method for Containing an Emission of Sulfur Trioxide
    7.
    发明申请
    System and Method for Containing an Emission of Sulfur Trioxide 有权

    公开(公告)号：US20170166448A1

    公开(公告)日：2017-06-15

    申请号：US14963795

    申请日：2015-12-09

    申请人： Chevron Phillips Chemical Company LP

    发明人： Daniel M. HASENBERG

    IPC分类号： C01B17/69

    CPC分类号： C01B17/69 ,  B01D53/1481 ,  B01D2252/2056 ,  B01D2257/302

    摘要： A system for containing an emission of sulfur trioxide, the system comprising a first pressurized vessel, the first pressurized vessel containing sulfur trioxide, a relief vessel containing a volume of a solvent solution, wherein the solvent solution comprises sulfolane, and a first relief conduit providing a first route of fluid communication between the first pressurized vessel and the relief vessel. A method for containing an emission of sulfur trioxide, the method comprising routing a first relief conduit so as to provide a first route of fluid communication between a first pressurized vessel and a relief vessel, wherein the first pressurized vessel contains sulfur trioxide, wherein the relief vessel contains a volume of a solvent solution, and wherein the solvent solution comprises sulfolane.