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公开(公告)号：US12116430B2
公开(公告)日：2024-10-15
申请号：US17425910
申请日：2020-01-23
CPC分类号： C08F2/01 , B01J4/008 , B01J19/0006 , B01J19/0053 , B01J2219/00164 , B01J2219/00182
摘要： A method for regulating use of stored diluent in a polymerization process so as to maximize use of diluent recycled diluent recovered from the process, and so minimize use of stored diluent, is disclosed. Also disclosed is apparatus, particularly as an arrangement of controllers and valves for handling the flow of diluent through the process that can be used to implement the disclosed process.
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公开(公告)号：US20240308938A1
公开(公告)日：2024-09-19
申请号：US18575940
申请日：2022-07-05
CPC分类号： C07C5/325 , B01J8/0278 , B01J8/0285 , B01J23/02 , B01J23/626 , B01J35/394 , C07C7/005 , B01J2208/00362 , C07C2521/10 , C07C2523/62
摘要： A method for forming an olefin, the method including: introducing a hydrocarbon feed stream into a reactor including a dehydrogenation catalyst; reacting the hydrocarbon feed stream with a dehydrogenation catalyst in the reactor to form a high temperature dehydrogenated product, the high temperature dehydrogenated product including at least a portion of the dehydrogenation catalyst; separating at least a portion of the dehydrogenation catalyst from the high temperature dehydrogenated product in a primary separation device and a secondary separation device downstream of and in fluid communication with the primary separation device; following the exit of high temperature dehydrogenation product from the secondary separation device, combining the high temperature dehydrogenation product with a quench stream to cool the high temperature dehydrogenation product and form an intermediate temperature dehydrogenation product, wherein the quench stream includes a hydrocarbon; and cooling the intermediate temperature dehydrogenation product to form a cooled dehydrogenation product.
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公开(公告)号：US12065518B2
公开(公告)日：2024-08-20
申请号：US17309175
申请日：2019-11-13
发明人： Paul J. Clymans , Jefferson P. Galliano , Philippe A. P. D'Hooghe , Cindy Dewitte , Henri A. Lammens
IPC分类号： C08F2/01 , B01J3/04 , B01J19/00 , C08F110/02 , C08F210/02 , C08F218/08
CPC分类号： C08F2/01 , B01J3/042 , B01J19/002 , C08F110/02 , B01J2219/00162 , B01J2219/00236 , B01J2219/00259 , B01J2219/0027 , C08F218/08 , C08F2400/04
摘要： Controlling the shutdown of a polyethylene reactor system that includes a secondary compressor, a reactor, a high pressure let down valve (HPLDV), a high-pressure separator, and a high-pressure recycle gas system is provided. After a partial or complete shutdown of secondary compressor, HPLDV opens to a pre-set open position until the reactor pressure reduces to either a pre-set reduced pressure limit or a until the slope of the reactor gas density to reactor pressure exceeds 0.15. The HPLDV controls the pressure to a pressure set point.
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公开(公告)号：US20240268381A1
公开(公告)日：2024-08-15
申请号：US18561642
申请日：2022-05-17
申请人： Nan HU , Maria MILINA , Chunzhao LI , Virginia VANCE , Anna TANCORRA , Aaron Eberle , ExxonMobil Chemical Patents Inc.
发明人： Nan Hu , Maria Milina , Chunzhao Li , Virginia Vance , Anna Tancorra , Aaron Eberle
摘要： Provided herein is an agrochemical composition suitable for use as an emulsifiable concentrate, comprising one or more active ingredients; one or more solvents selected from specific amides and esters; and optionally, one or more surfactants.
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5.发明公开公开(公告)号：US20240239724A1
公开(公告)日：2024-07-18
申请号：US18558329
申请日：2022-05-03
发明人： Anita BOROWIEC , Shiwen LI , Wenyih LAI , Jocelyn KOWALSKI , Marcel JANSSEN , Travis REINE , Luc MARTENS
IPC分类号： C07C2/12
CPC分类号： C07C2/12 , C07C2529/06
摘要： A feed mixture comprising at least one C3 olefin and/or at least one C4 olefin may be contacted with a zeolite catalyst under oligomerization reaction conditions to form a product mixture comprising a plurality of olefin oligomers. The zeolite catalyst, optionally with one or more further modifications, may be selected for operability at high WHSV values that may produce at least C12 olefins in the product mixture having an average branching index of about 2.2 or less. Under suitable conditions, C10-C13 olefins may comprise at least about 25% of the product mixture, M based on total olefin oligomers. Percentage conversion of the at least one C3 olefin and/or at least one C4 olefin may impact the average branching index of at least C12 olefin oligomers and selectivity for C10-C13 olefin oligomers. An amount of C4 olefin in the feed mixture may produce a targeted selectivity for at least C1 olefins.
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公开(公告)号：US20240230242A1
公开(公告)日：2024-07-11
申请号：US18561649
申请日：2022-05-12
发明人： Brian W. Heins , Paul Hamilton
CPC分类号： F28D20/021 , F28D7/06 , F28D2020/0026 , F28D2020/0078
摘要： Apparatuses for maintaining a solid as a melt (e.g., for storage or transport) may comprise: a closed vessel having an upper section and a lower section; a pool of a heat-receiving fluid located in the lower section; at least one product circulation conduit located in the lower section and at least partially immersed in the pool of the heat-receiving fluid; and a cooling fluid conduit located in the upper section and spaced apart from the pool of the heat-receiving fluid, the cooling fluid conduit being in thermal communication with vapor produced from the heat-receiving fluid; wherein a cooling fluid is present in the cooling fluid conduit.
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公开(公告)号：US20240228411A1
公开(公告)日：2024-07-11
申请号：US18558339
申请日：2022-05-03
发明人： Chunzhao LI , Shiwen LI , Joshua CUTLER , Alan GALUSKA
IPC分类号： C07C29/141 , B01J23/75 , B01J29/70 , C07C2/12 , C07C303/24
CPC分类号： C07C29/141 , B01J23/75 , B01J29/7046 , C07C2/12 , C07C303/24 , B01J2229/30 , C07C2523/75 , C07C2529/70
摘要： A feed mixture comprising at least one C3 olefin and/or at least one C4 olefin may be contacted with a zeolite catalyst under oligomerization reaction conditions to form a product mixture comprising a plurality of olefin oligomers comprising C12 olefin oligomers having an average branching index, as measured by gas chromatography, of about 2.2 or less, such as about 1.3 to about 2.0. The olefin oligomers may be contacted with a syngas mixture comprising carbon monoxide and hydrogen in the presence of a hydroformylation catalyst to form a hydroformylation reaction product, which may be subsequently reduced to form a plurality of branched alcohols. The branched alcohols, in turn, may be converted into an amphiphilic compound, such as a plurality of branched alcohol sulfates.
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公开(公告)号：US20240166953A1
公开(公告)日：2024-05-23
申请号：US18550397
申请日：2022-04-04
发明人： Mark A. Rooney , David Spicer , Bryan D. McVicker
CPC分类号： C10G9/206 , C10G9/36 , C10G2300/4006 , C10G2300/4037 , C10G2300/708
摘要： Processes and systems for steam cracking hydrocarbon feeds. The process can include introducing a first hydrocarbon feed into radiant coil(s) disposed within a first segment of a firebox to produce a first steam cracker effluent having a first coil outlet temperature. A second hydrocarbon feed can be introduced into radiant coil(s) disposed within a second segment of the firebox to produce a second steam cracker effluent having a second coil outlet temperature. The first and second segments can each include one or more burners providing heat thereto. The burner(s) in each segment can be operated at substantially the same firing rate such that an amount of heat produced by each burner can be substantially the same. A feed rate of the first hydrocarbon feed can be controlled based, at least in part, on a composition of the first hydrocarbon feed and the first coil outlet temperature.
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公开(公告)号：US11986992B2
公开(公告)日：2024-05-21
申请号：US17048026
申请日：2019-05-22
CPC分类号： B29C48/92 , B29C48/0018 , B29C48/10 , C08F10/02 , C08J5/18 , B29K2023/06 , B29L2023/001 , C08J2323/06
摘要： Methods for forming polyolefin films using a model including a multivariate adaptive regression splines (MARS)-derived algorithm are provided. Related computing devices are also provided.
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公开(公告)号：US11976140B2
公开(公告)日：2024-05-07
申请号：US17279708
申请日：2019-10-30
IPC分类号： C08F210/16 , B01J8/00 , B01J8/22 , C08F2/01 , C08F4/659 , C08F4/6592 , C08F10/02
CPC分类号： C08F10/02 , B01J8/004 , B01J8/22 , C08F2/01 , C08F4/65925 , C08F4/65927 , C08F210/16 , B01J2208/00548 , B01J2208/00787 , B01J2208/00849
摘要： A process for polymerizing polyethylene is disclosed. The process comprises contacting ethylene and at least one comonomer with a catalyst system to produce a polyolefin. The first catalyst and at least a portion of the second catalyst are co-supported to form a commonly-supported catalyst system. The catalyst system is introduced to a line as a dry-feed. The line is coupled with a polymerization reactor. A carrier fluid is added to the line to form a slurry. The slurry is introduced to the polymerization reactor.
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