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公开(公告)号：US12065529B2
公开(公告)日：2024-08-20
申请号：US17044494
申请日：2019-11-27
申请人： LG Chem, Ltd.
发明人： Sungkeun Jang , Changhoe Heo , Seonghun Kim , Eun Jung Joo , Donghoon Kim
摘要： The present disclosure relates to a purification method of a polymerization solvent used in and recovered from the preparation of a polyolefin resin, which can effectively remove impurities, in particular polyolefin wax, from the polymerization solvent to obtain a purified polymerization solvent with high purity, and can improve energy efficiency.
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公开(公告)号：US20240238694A1
公开(公告)日：2024-07-18
申请号：US18009541
申请日：2022-07-27
发明人： Jing ZHANG , Chenggang HE , Jiahui GU , Haiyan ZHOU , Xia CHEN , Zhigang XU
摘要： The present disclosure provides a method for refining styrene by using falling film reboilers and heat pump technology to provide a heat source required by a separation column. According to the method, based on an existing energy-saving technology of coupled high and low pressure ethylbenzene/styrene separation columns, high-concentration gas-phase ethylbenzene separated from a top of a low pressure ethylbenzene/styrene column is directly pressurized through a compressor, or a heat pump working medium is gasified using the high-concentration gas-phase ethylbenzene separated from the top of the low pressure ethylbenzene/styrene column, and the gasified heat pump working medium is pressurized. The directly pressurized high-concentration gas-phase ethylbenzene or the indirectly gasified and pressurized high-concentration gas-phase ethylbenzene is fed into the falling film reboiler with low heat transfer temperature difference requirement to serve as a heat source of a pre-separation column and/or a styrene product column in a styrene separation process. According to the solution, energy consumption in the styrene separation process is further greatly reduced, costs can be recovered within a relatively short period of time after the production process is correspondingly improved and put into production, and long-term economic benefits are remarkable.
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公开(公告)号：US20240182391A1
公开(公告)日：2024-06-06
申请号：US18556146
申请日：2021-04-19
发明人： Isko Kajanto
CPC分类号： C07C29/82 , B01D3/322 , B01D3/36 , B01D3/4205
摘要： A method for recovering mono-ethylene glycol from a mixture feed comprising bio-derived diols is disclosed. The mixture feed comprises mono-ethylene glycol in an amount of at least 80 weight-% of the total weight of the mixture feed. The method comprises: —providing the mixture feed into a distillation column, wherein a distillation process is carried out, wherein the distillation column comprises at least 80 theoretical stages and wherein the mixture feed is fed into the distillation column at a point, which is at a height of 5-20% of the total height of the distillation column as calculated from the top of the distillation column, wherein the total height of the distillation column is determined based on the number of theoretical stages, and wherein the distillation process is carried out with a reflux ratio of 20-200; and —recovering mono-ethylene glycol. Further is disclosed a distillation arrangement.
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公开(公告)号：US11986754B2
公开(公告)日：2024-05-21
申请号：US17655059
申请日：2022-03-16
发明人： Hasan M. Alshafei
CPC分类号： B01D3/322 , B01D3/26 , B01D53/1425 , B01D53/1493 , B01D2252/103 , B01D2252/20478
摘要： An alkanolamine gas treatment unit system that may comprise an absorber column, a regenerator column, and a once-through natural circulation vertical thermosyphon reboiler comprising a reboiler tube and a shell. The reboiler may be a steam driven one having a process side and a shell side, wherein the process side is inside the reboiler tube, the process side of the reboiler and the regenerator column are in fluid communication with one another, an inner surface of the reboiler tube, on the process side, has a surface roughness of 0.06 μm or greater, the shell side of the reboiler is in fluid communication to a steam source, and the regenerator column and the absorber column are in fluid communication with one another. An absorbent regenerator system that may comprise the regenerator column and the once-through natural circulation vertical thermosyphon reboiler.
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公开(公告)号：US20240084202A1
公开(公告)日：2024-03-14
申请号：US18514516
申请日：2023-11-20
发明人： Francesco Gallo , Oscar Pelis , Alessandro Quaglia , Aldo Roldi
CPC分类号： C10G7/006 , B01D3/106 , B01D3/32 , C10G2300/1007
摘要： An emergency distillation column (2) is disclosed, connected to a plant wherein a main distillation column (1) is present. Such connection occurs by means of by-pass of the pipes which supply said main column, which by-pass has stopping means of the liquid which allow the supply of said emergency column when the pressure drops downstream of the main column exceed a preset threshold value. Preferably, said stopping means are shut-off valves (28; 33; 35).
A process of use of a column (2) is furthermore described as in any one of the preceding claims wherein the pressure difference between inflow and outflow of the liquid being distilled is measured continuously and compared against a dedicated threshold.
Finally, a plant for the regeneration of waste oils is disclosed, comprising a distillation column, which furthermore comprises an emergency distillation column (2), as previously defined.-
公开(公告)号：US11925929B1
公开(公告)日：2024-03-12
申请号：US17944616
申请日：2022-09-14
发明人： Anthony Frederick Barletta, Jr. , Scott William Golden , Edward Lee Hartman , Steven Leslie White
CPC分类号： B01J8/0085 , B01D3/26 , B01D3/32 , B01D3/4222 , B01D3/4255 , C10G7/12 , C10G11/187 , B01J2208/00902 , C10G2300/4081 , C10G2300/708
摘要： A fluid catalytic cracking unit fractionator comprising a fractionator column having a slurry pumparound section and a bottom liquid section. The slurry pumparound section comprises an upper bed and a lower bed each disposed in the fractionator column. The slurry pumparound section further comprises an upper liquid distributor (such as a spray header comprising a plurality of upper nozzles) disposed above the upper bed and configured to distribute liquid from the bottom liquid section onto the upper bed. The slurry pumparound section also comprises a lower liquid distributor (such as a spray header comprising a plurality of lower nozzles) disposed below the upper bed and above the lower bed and configured to distribute liquid from the bottom liquid section onto the lower bed.
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公开(公告)号：US11786855B2
公开(公告)日：2023-10-17
申请号：US15940895
申请日：2018-03-29
申请人： UOP LLC
发明人： Zhanping Xu
CPC分类号： B01D46/0009 , B01D1/305 , B01D3/28 , B01D3/326 , B01J19/32 , B01J2219/32234 , B01J2219/32408
摘要： A high capacity and high efficiency vapor-liquid contacting apparatus and process is useful in distillation columns and other vapor-liquid contacting processes. The apparatus is characterized by a half module comprising a downcomer against a shell of a vessel for transporting liquid to a subjacent stage which utilizes a demister to effect vapor-liquid separation at the downcomer outlet.
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公开(公告)号：US20230295524A1
公开(公告)日：2023-09-21
申请号：US17655051
申请日：2022-03-16
发明人： Steven R. Horlacher
CPC分类号： C10G67/00 , C10G7/12 , C10G47/16 , C10G49/002 , C10G45/00 , B01D3/009 , B01D3/32 , C10G2300/4006 , C10G2300/4012 , C10G2300/301 , C10G2400/02 , C10G2400/26
摘要： A pyrolysis oil fractionation system for treating a pyrolysis oil feed includes a fractionation column, at least one treatment catalyst bed, and a plurality of distillation trays. The system further includes a condenser to receive a light fraction and produce a condensed gasoline product and a vapor, a receiver coupled to the condenser, a knockout drum, and a distillate stripper coupled to the fractionation column. A method for treating a pyrolysis oil feed includes, in a fractionating column, dehydrohalogenating, decontaminating, and/or dehydrating a pyrolysis oil feed in at least one treatment catalyst bed, and distilling the treated pyrolysis oil feed into a light fraction, a middle fraction, a heavy fraction, and a bottom fraction. The method further includes condensing the light fraction and producing a condensed gasoline product and a vapor, separating a fuel gas product from the vapor, and stripping the middle fraction to produce a distillate product.
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公开(公告)号：US11738284B2
公开(公告)日：2023-08-29
申请号：US17646189
申请日：2021-12-28
申请人： UOP LLC
发明人： Zhanping Xu , Brian J. Nowak
摘要： Distillation trays having improved efficiency and capacity are described. The improvement is accomplished with unique downcomer spout arrangements and bubble promoters which provide equal liquid distribution to all areas of the tray. The ratio of the open area of a contacting zone including part of a bubble promoter and associated deck zone over the open area of the downcomer spout zone on the adjacent tray for distributing liquid to the zone is essentially the same across the tray.
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公开(公告)号：US20230249096A1
公开(公告)日：2023-08-10
申请号：US18106990
申请日：2023-02-07
发明人： Cyrille BABINET , Eric GALLOPIN , Gilles LEBAIN
IPC分类号： B01D3/32
CPC分类号： B01D3/32
摘要： The present invention relates to an insertion device for inserting at least one section of packing for a gas/liquid separation column into a cylindrical casing, characterized in that a deployment module comprises a main member centred about a main axis of the insertion device, and a plurality of peripheral members arranged circumferentially and uniformly around the main axis, each of the peripheral members comprising an attachment means configured to grasp hold of a packing section, the deployment module comprising a plurality of branches arranged as pairs of branches connecting the main member to one of the peripheral members, the deployment module being able to modify the dimension of the insertion device by modifying a radial distance between the main member and each of the peripheral members.
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