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公开(公告)号：US12151189B2
公开(公告)日：2024-11-26
申请号：US17422576
申请日：2020-02-05
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Selma S. Lawrence , Michael Moran , John S. Coleman , Robert S. Bartel , Vikram Singh , Monica Malhotra
Abstract: Systems and methods are provided for reducing or minimizing fouling within the primary fractionator of a pyrolysis reaction system. The reduced or minimized fouling can be achieved in part by providing one or more pump-around trays in the primary fractionator below the level of the fractionation trays for an intermediate product produced by the fractionator. Including a pump-around section below the fractionation trays can improve vapor distribution within the fractionation trays, which are believed to have an increased likelihood of accumulation of foulant deposits. Optionally, other vapor distribution devices can be included along with the pump-around section.
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公开(公告)号：US20220096955A1
公开(公告)日：2022-03-31
申请号：US17422576
申请日：2020-02-05
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Selma S. Lawrence , Michael Moran , John S. Coleman , Robert S. Bartel , Vikram Singh , Monica Malhotra
Abstract: Systems and methods are provided for reducing or minimizing fouling within the primary fractionator of a pyrolysis reaction system. The reduced or minimized fouling can be achieved in part by providing one or more pump-around trays in the primary fractionator below the level of the fractionation trays for an intermediate product produced by the fractionator. Including a pump-around section below the fractionation trays can improve vapor distribution within the fractionation trays, which are believed to have an increased likelihood of accumulation of foulant deposits. Optionally, other vapor distribution devices can be included along with the pump-around section.
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公开(公告)号：US20240034703A1
公开(公告)日：2024-02-01
申请号：US18268463
申请日：2022-01-03
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Selma S. Lawrence , Mark A. Nierode , Rodney S. Smith
CPC classification number: C07C7/09 , C07C7/12 , C10G55/04 , C10G2400/20
Abstract: Processes are provided for removing contaminants from a refinery gas. Such process can include recovering a process gas comprising ethylene and propylene from a steam cracker effluent recovered from a stream cracker in a steam cracker facility. A refinery gas can be recovered from a refinery facility. The process gas can be compressed in a plurality of compressor stages. A pressure of the refinery gas can be determined. A compressor stage in the plurality of compressor stages can be selected for introducing the refinery gas using the determined pressure of the refinery gas. The refinery gas can be introduced into the selected compressor stage to produce a combined gas that can include the process gas and the refinery gas. At least a portion of one or more impurities can be removed from the combined gas in the steam cracker facility to produce an upgraded combined gas.
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公开(公告)号：US20220267680A1
公开(公告)日：2022-08-25
申请号：US17624985
申请日：2020-07-22
Applicant: ExxonMobil Chemical Patents Inc.
Inventor： Vikram Singh , James R. Arnold , Selma S. Lawrence
Abstract: The process can include transferring heat from a light product in a first heat exchange stage to produce a cooled product and a first medium pressure steam and separating a steam cracker quench oil therefrom. Heat can be transferred from the steam cracker quench oil in a second heat exchange stage to produce a first cooled quench oil and a second medium pressure steam. Heat can be transferred from at least a portion of the first cooled quench oil in a third heat exchange stage to produce a second cooled quench oil and low pressure steam. A total heat duty generated in the first heat exchange stage, the second heat exchange stage, and the third heat exchange stage can be equal to QT1 and a heat duty generated in the first heat exchange stage and the second heat exchange stage can be ≥0.5QT1 joules/sec.
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