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公开(公告)号：US20230407196A1
公开(公告)日：2023-12-21
申请号：US18246963
申请日：2021-09-27
摘要： A method for reducing fouling in an aqueous system of an olefin production plant is disclosed. The method includes adding an effective amount of a surfmer to the aqueous system, wherein the surfmer forms a water soluble adduct by covalently bonding to one or more fouling precursor compounds formed during olefin production.
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公开(公告)号：US20230399275A1
公开(公告)日：2023-12-14
申请号：US18250625
申请日：2021-10-29
申请人： LINDE GMBH
发明人： Torben Hofel , Helmut Fritz
摘要： A process for producing olefins includes subjecting a first feed stream to dehydrogenation to obtain a first product stream, and subjecting part of the first product stream to a first separation sequence. The first separation sequence comprises a first separation step to which part of the first product stream is fed and in which a gas fraction and a liquid fraction are formed. The first separation sequence comprises a second separation step to which part of the liquid fraction is fed and in which the transfer fraction is formed. A second feed stream is subjected to steam cracking to obtain a second product stream. part of which is subjected to crude gas compression and thereafter to a second separation sequence. In the first separation sequence a transfer fraction is formed. At least part of the transfer fraction is transferred to the steam cracking or the crude gas compression.
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公开(公告)号：US20230257324A1
公开(公告)日：2023-08-17
申请号：US18026450
申请日：2021-09-16
CPC分类号： C07C4/04 , C08J11/12 , C10B53/07 , C10G1/10 , C08J2321/00 , C08J2387/00 , C10G2300/1003 , C10G2400/20 , C10G2400/30
摘要： The invention relates to a pyrolysis method and reactor for recovering at least one component from a carbon based material using thermal decomposition. The carbon based material is delivered to a pyrolytic chamber (1), exposed to a controlled atmosphere and heated to a decomposition temperature of the at least one component in the pyrolytic chamber (1) by microwave radiation. A variable power microwave radiation at frequencies between 300 MHz and 2200 MHZ is applied to sequentially increase a temperature in the pyrolytic chamber (1) over a temperature range including the decomposition temperature of the at least one component.
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公开(公告)号：US11702377B2
公开(公告)日：2023-07-18
申请号：US17122030
申请日：2020-12-15
摘要： The present invention relates to an NCC process and an apparatus for producing light olefins and aromatics, wherein the fraction comprising ethane and/or propane (12) from the cracking effluent is sent at least partly into a steam cracking furnace (19), fed with steam (20), to produce a steam cracking effluent (21) comprising ethylene and/or propylene.
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公开(公告)号：US11680028B2
公开(公告)日：2023-06-20
申请号：US17422784
申请日：2020-01-16
发明人： Ravichander Narayanaswamy , Hatem Belfadhel , Girish Koripelly , Alexander Stanislaus , Krishna Kumar Ramamurthy , Krishnan Sankaranarayanan
摘要： Systems and methods for producing olefins and/or aromatics are disclosed. Methods disclosed includes aqua-processing hydro-processing of crude oils and/or heavy oils and/or residue, in an aqua-processing hydro-processing unit, to produce intermediate products, which can then be used to make valuable chemicals such as olefins and aromatics.
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公开(公告)号：US11650008B2
公开(公告)日：2023-05-16
申请号：US16635102
申请日：2018-09-05
申请人： LG CHEM, LTD.
发明人： Tae Woo Kim , Sung Kyu Lee , Inseop Kim , Joon Ho Shin
CPC分类号： F25J3/0219 , C07C4/04 , C10G9/00 , F17C7/04 , F25J3/0238 , C10G2300/1044 , F17C2221/035 , F25J2210/12 , F25J2210/62 , F25J2215/64
摘要： A method for vaporizing liquid propane to be supplied as a raw material to a naphtha cracking ractor. The method comprises: decompressing liquid propane to lower a vaporization point and vaporize at least a portion of the liquid propane; utilizing vaporization heat, generated during vaporization of the portion of liquid propane, as a refrigerant; compressing the vaporized propane gas to increase pressure of the propane gas and produce compressed propane gas; and preheating the compressed propane gas. By using this method, it is possible to reduce pressure of liquid propane to a significantly lower pressure than the related art method so that all the vaporization latent heat or vaporization heat included in liquid propane may be utilized as a refrigerant, while also reducing heat energy consumed in a preheat process before it is supplied to the naphtha cracking reactor.
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公开(公告)号：US20230079004A1
公开(公告)日：2023-03-16
申请号：US18051001
申请日：2022-10-30
申请人： Chevron U.S.A. Inc.
发明人： Hye-Kyung Timken
摘要： Provided in one embodiment is a continuous process for converting waste plastic into recycle for polyethylene polymerization. The process comprises selecting waste plastics containing polyethylene and/or polypropylene, and passing the waste plastics through a pyrolysis reactor to thermally crack at least a portion of the polyolefin waste and produce a pyrolyzed effluent. The pyrolyzed effluent is separated into offgas, a pyrolysis oil and optionally wax comprising a naphtha/diesel and heavy fraction, and char. The pyrolysis oil and wax is passed to a refinery FCC unit from which a liquid petroleum gas C3-C5 olefin/paraffin mixture fraction is recovered. The liquid petroleum gas C3-C5 olefin/paraffin mixture fraction is passed to a refinery alkylation unit, with a propane and butane fraction recovered from the alkylation unit. The propane and butane fraction is then passed to a steam cracker for ethylene production. In another embodiment, a naphtha fraction (C5-C8) is recovered from the alkylation unit and passed to the steam cracker. In another embodiment, a propane/propylene fraction (C3-C3) is recovered from the FCC and passed to the steam cracker.
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公开(公告)号：US20220340820A1
公开(公告)日：2022-10-27
申请号：US17658921
申请日：2022-04-12
IPC分类号： C10G1/00 , C10G1/10 , C10G9/36 , C07C4/04 , C10L3/06 , C10L1/06 , C10L1/08 , C08F10/02 , C10G11/18 , C10B53/07 , C10B57/06
摘要： Processes for using pyrolysis gas as a feedstock or a co-feedstock for making a variety of chemicals, for example, circular ethylene, circular ethylene polymers and copolymers, and other circular products. In these processes, pyrolysis reactor conditions can be selected to increase or optimized the production of pyrolysis gas over pyrolysis oil, and the pyrolysis gas which is usually used as fuel or flared can be fed downstream of the steam cracker furnace for economic use to form circular chemicals. Operating parameters of the pyrolysis unit may be adjusted to increase or decrease the proportion of pyrolysis gas relative to pyrolysis liquid as a function of their relative economic values.
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公开(公告)号：US11267768B2
公开(公告)日：2022-03-08
申请号：US16832092
申请日：2020-03-27
发明人： Rakesh Agrawal , Peter Oladipupo
摘要： A process for producing olefins by cracking paraffins in the presence of methane. In the conventional steam cracking processes for olefin production, steam is used as a diluent in the feed mixture to the thermal cracker. In the processes provided herein, methane replaces steam as a diluent in the feed mixture to the thermal cracker. Replacing steam with methane as a diluent has a potential for cost savings in the construction and operation of a thermal cracking plant for olefin production. In addition, it leads to a much simpler cracking process compared to the conventional steam cracking technology as in the state of the art.
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10.发明授权公开(公告)号：US11236031B2
公开(公告)日：2022-02-01
申请号：US16789092
申请日：2020-02-12
IPC分类号： C07C29/141 , C07C41/06 , C07C5/05 , C07C6/04 , C07C5/03 , C07C45/34 , C07C2/08 , B01J19/24 , C10L1/06 , C10L1/08 , C10L1/16 , C10G9/36 , C07C2/86 , C07C43/04 , C07C45/50 , C07C41/08 , C07C4/04 , C07C4/02 , C07C29/14 , C07C29/136 , C07C45/49 , C07C6/06 , C07C1/24
摘要： The present application provides systems and methods for producing isononanol and gasoline and diesel blending components. In at least one embodiment of the present systems and methods, a hydrocarbon feed is cracked in a steam cracker to form a first ethylene stream, a first propylene stream, and a C4 stream comprising isobutene and butadiene. The C4 stream is reacted with a methanol stream in a methyl tertiary butyl ether (MTBE) unit to form MTBE and a butadiene-rich C4 stream. The butadiene-rich C4 stream is selectively hydrogenated in a butadiene unit to form a butene-rich C4 stream. The butene-rich C4 stream undergoes a series of reactions in an isononanol unit to produce isononanol and an olefin-rich stream. The olefin-rich stream is then separate, in a separation unit, a C8, C12, and C16 fuel oil streams.
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