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公开(公告)号：US20220081376A1
公开(公告)日：2022-03-17
申请号：US17474953
申请日：2021-09-14
发明人： Lei Zhang , Pranit S. Metkar , Majid Keyvani , Daniel F. White
IPC分类号： C07C6/04
摘要： Disclosed herein is a process for upgrading a raffinate butene (C4 Raffinate) stream to propylene which can produce polymer grade propylene (PGP) by a metathesis process, without consuming fresh ethylene as a feedstock. By recycling ethylene byproduct in the metathesis equilibrium, propylene selectivity can be further improved without negatively impacting butene conversion. Additionally, upon PGP separation, this technology can provide an effluent acceptable for alkylate production by achieving a balanced butene conversion and heavies coproduction. The disclosed process is a relatively low temperature process which can be deployed as a drop-in option for conventional ethylene/butene metathesis unit and provide additional flexibility to existing operations to balance the supply and demand of C2-C4 light olefins.
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公开(公告)号：US20210331989A1
公开(公告)日：2021-10-28
申请号：US17235418
申请日：2021-04-20
发明人： Lei Zhang , Majid Keyvani , Daniel F. White
摘要： A low temperature on-purpose propylene production method is described. The method includes autometathesis of butene streams without an initial ethylene feedstock stream using supported autometathesis catalysts that are active at low temperatures. The low temperature allows for liquid phase reactions, which increases the selective production of propylene. The lack of an initial ethylene feedstock stream and low reaction temperature also reduces coking on the autometathesis catalysts, thus extending its lifetime.
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公开(公告)号：US20180127662A1
公开(公告)日：2018-05-10
申请号：US15802773
申请日：2017-11-03
发明人： Lei Zhang , Daniel F. White
IPC分类号： C10G29/16
CPC分类号： C10G29/16 , C07C7/1485 , C10G2300/1088 , C10G2300/202 , C10G2400/22 , C07C11/02 , C07C11/107
摘要： Provided herein are methods of reducing phosphorus content of a liquid hydrocarbon. The liquid hydrocarbon may be contacted with a catalyst that includes copper (II) oxide to produce a low-phosphorus liquid hydrocarbon.
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公开(公告)号：US20170217856A1
公开(公告)日：2017-08-03
申请号：US15414384
申请日：2017-01-24
发明人： Lei Zhang , Daniel F. White
CPC分类号： C07C6/04 , B01J21/10 , B01J23/30 , C07C5/2512 , C07C2521/08 , C07C2521/10 , C07C2523/30 , Y02P20/52 , C07C11/06 , C07C11/08
摘要： The present disclosure relates to chemical catalysts and methods that may be used for the production and/or interconversion of olefins. In some embodiments, methods for producing propylene from ethylene and butene comprising, (a) obtaining a catalyst composition comprising an isomerization catalyst and a disproportionation catalyst, wherein the weight ratio of the isomerization catalyst to the disproportionation catalyst is from 10:1 to 1:10; and (b) reacting butene with ethylene at a temperature from about 500° F. (260° C.) to about 650° F. (350° C.) in the presence of the catalyst composition under conditions sufficient to produce propylene are provided.
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公开(公告)号：US11827589B2
公开(公告)日：2023-11-28
申请号：US17951578
申请日：2022-09-23
发明人： Linn Fang , Daniel F. White , Lei Zhang
CPC分类号： C07C5/2708 , C07C6/04 , C10L1/06 , C10L2200/0423 , C10L2270/023 , C10L2290/24
摘要： Methods of converting isobutylene to C5+ compounds. The methods may include contacting isobutylene with a skeletal isomerization catalyst to provide a mixture of C4 olefins, and then contacting the mixture of C4 olefins with a metathesis catalyst to convert the mixture of C4 olefins to a product mixture. The product mixture may include C5+ olefins.
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公开(公告)号：US10947463B2
公开(公告)日：2021-03-16
申请号：US16563350
申请日：2019-09-06
发明人： Lei Zhang , Daniel F. White
摘要： Methods of reducing a phosphorus content of a liquid hydrocarbon. The liquid hydrocarbon may be co-fed with an olefin to an alkylation unit to produce a low-phosphorus content liquid hydrocarbon product.
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公开(公告)号：US20200087588A1
公开(公告)日：2020-03-19
申请号：US16563350
申请日：2019-09-06
发明人： Lei Zhang , Daniel F. White
摘要： Methods of reducing a phosphorus content of a liquid hydrocarbon. The liquid hydrocarbon may be co-fed with an olefin to an alkylation unit to produce a low-phosphorus content liquid hydrocarbon product.
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公开(公告)号：US10011781B2
公开(公告)日：2018-07-03
申请号：US15802773
申请日：2017-11-03
发明人： Lei Zhang , Daniel F. White
IPC分类号： C10G29/16
CPC分类号： C10G29/16 , C07C7/1485 , C10G2300/1088 , C10G2300/202 , C10G2400/22 , C07C11/02 , C07C11/107
摘要： Provided herein are methods of reducing phosphorus content of a liquid hydrocarbon. The liquid hydrocarbon may be contacted with a catalyst that includes copper (II) oxide to produce a low-phosphorus liquid hydrocarbon.
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公开(公告)号：US10947175B2
公开(公告)日：2021-03-16
申请号：US16678225
申请日：2019-11-08
发明人： Lei Zhang , Daniel F. White
IPC分类号： C07C45/86
摘要： Provided are methods of treating a mixture, such as a hydrocarbon mixture, that includes one or more C2-C4 carbonyl containing organic compounds. The methods may include contacting a hydrocarbon mixture with an aqueous liquid including an agent. The agent may reduce the amount of one or more C2-C4 carbonyl containing organic compounds in the mixture.
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公开(公告)号：US10737992B2
公开(公告)日：2020-08-11
申请号：US16293906
申请日：2019-03-06
发明人： Daniel F. White , Lei Zhang
摘要： Methods of forming propylene and alkylate are provided. The methods may include providing a stream that includes n-butenes, and contacting the stream with ethylene in the presence of a disproportionation catalyst to form a stream that includes propylene. Propylene then may be removed from the stream, and the stream may be disposed in an alkylation unit to form alkylate.
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