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公开(公告)号：US20240336481A1
公开(公告)日：2024-10-10
申请号：US18292066
申请日：2022-08-25
发明人： Bent VIGELAND , Halvor ØIEN , Peter FAUCONNIER , Andre DE SMET
CPC分类号： C01B21/38 , B01D53/002 , B01D53/1456 , B01D53/18 , C01B21/28 , B01D2252/103 , B01D2257/404 , B01D2258/02
摘要： A system for producing nitric acid at reduced power, the system being a standard dual pressure nitric acid plant further including features for splitting a tail gas stream into a first tail gas stream, in fluid communication with an oxygen-rich gas upstream the ammonia mixing unit, and a second tail gas stream, and features for adjusting the amount of tail gas being split into the first tail gas stream and the second tail gas stream, such that an air compressor is not required for operating the nitric acid plant. A method for operating the system, the use of the system for performing the method and, a method for revamping a standard dual pressure nitric acid plant into the system.
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公开(公告)号：US20240307814A1
公开(公告)日：2024-09-19
申请号：US18278666
申请日：2022-03-02
发明人： Udaypal SINGH
CPC分类号： B01D53/1425 , B01D53/1475 , B01D53/1493 , B01D53/18 , C01B3/48 , C01B3/52 , C01C1/04 , C10L3/103 , F22B1/08 , B01D2252/10 , C01B2203/0205 , C01B2203/0288 , C01B2203/0415 , C01B2203/0475 , C01B2203/1241 , C01B2203/1258 , C01B2203/142 , C01B2203/86
摘要： A method comprising the steps of:
a) capturing carbon dioxide in a carbon dioxide absorption unit using a carbon dioxide absorption solution;
b) feeding the carbon dioxide absorption solution comprising absorbed carbon dioxide and generated in step a) to the high-pressure regenerator of a heat exchange system comprising the high-pressure regenerator and a steam-fired reboiler; and
c) supplying low-pressure steam at a pressure ranging from 3.2 to 3.5 kg/cm2 to the steam-fired reboiler for supplying heat to the high-pressure regenerator wherein, the carbon dioxide absorption solution is heated, thereby producing a steam condensate and a regenerated carbon dioxide absorption solution;
characterized in that the method further comprises the step of:
d) directly supplying the steam condensate produced in step c) to a de-aerator, thereby producing an aqueous solution suitable for producing steam with an oxygen content lower than 20 ppb.-
公开(公告)号：US20240228402A9
公开(公告)日：2024-07-11
申请号：US18280520
申请日：2022-03-08
发明人： Francois LEDOUX , Petr CHLADEK
IPC分类号： C06B47/14
CPC分类号： C06B47/145
摘要： An explosive emulsion composition of the water-in-oil type, comprising
between 80 wt. % and 95 wt. % of an oxidizer phase composition comprising
at least 40 wt. % of ammonium nitrate (AN), and
at least 15 wt. % of calcium nitrate (CN), and optionally one or more other secondary nitrate salts,
between 5 wt. % and 20 wt. % of an organic phase comprising
between 12 wt. % and 50 wt. % of one or more emulsifiers,
between 50 wt. % and 88 wt. % of a fuel composition,
in view of the total weight of the organic phase composition,
characterized in that the fuel composition comprises between 20 wt. % and 100 wt. % of a straight vegetable oil (SVO), and
wherein the explosive emulsion composition is stable and has a viscosity between 25,000 cP and 125,000 cP, as measured with a Brookfield viscometer with spindle size 7 at a frequency of 20 rpm at 30° C.-
公开(公告)号：US11992789B2
公开(公告)日：2024-05-28
申请号：US17297611
申请日：2020-01-29
IPC分类号： F25B29/00 , B01D1/00 , B01D1/06 , B01D3/34 , F28D7/00 , F28D7/16 , F28D15/00 , F28F9/22 , F28D21/00
CPC分类号： B01D3/346 , B01D1/0041 , B01D1/06 , F28D7/1676 , F28F9/22 , F28D2021/0022 , F28F2009/226 , F28F2009/228
摘要： Shell-and-tube strippers for stripping a urea/carbamate mixture, related systems, methods, and uses. The stripper includes a shell and a plurality of tubes disposed within the shell. Baffles and deflectors offer improved homogeneity of heating fluid flow in the stripper's shell-side space.
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公开(公告)号：US20240165601A1
公开(公告)日：2024-05-23
申请号：US18282026
申请日：2022-03-29
发明人： Faisal GHAFOOR , Hanne DE GEEST , Armin RAMIC , Frederick VAES
CPC分类号： B01J38/10 , B01J19/002 , B01J19/245 , C01B3/48 , C01C1/0417 , B01J2219/00024 , B01J2219/00245 , C01B2203/0233 , C01B2203/0255 , C01B2203/0283 , C01B2203/0445 , C01B2203/047 , C01B2203/0475 , C01B2203/068 , C01B2203/1241 , C01B2203/127 , C01B2203/84
摘要： A method for revamping a system comprising at least two ammonia production units, each unit comprising an ammonia converter each having an inlet for receiving a process gas and an outlet for releasing a purge gas, the method for revamping comprising the step of fluidly connecting the inlet of the converter of a first ammonia production unit to the outlet of the converter of a second ammonia production unit, for transporting the purge gas being produced by the converter of the second ammonia production unit, to the converter of the first ammonia production unit. Finally, the present disclosure describes a method for the reduction of a catalyst in an ammonia converter, in an ammonia production system comprising at least two ammonia production units and a system in which the method for the reduction of the catalyst can performed.
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6.发明公开公开(公告)号：US20240138291A1
公开(公告)日：2024-05-02
申请号：US18281014
申请日：2022-03-14
发明人： Stefan REUSCH
IPC分类号： A01C21/00
CPC分类号： A01C21/007
摘要： A system and method for providing a fertilizer recommendation for an agronomic field based on a direct measurement of a crop nutrient level at a measurement location, including receiving field and remote data. Optional approaches include adjusting the fertilizer recommendation based on at least one of the received field, farm and/or weather data. Alternatively, based on field data, at least one measurement region for carrying out a measurement for providing a fertilizer recommendation is determined. Optional approaches include receiving remote data, farm data and/or weather data to manage the improve the measurement region determination.
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公开(公告)号：US20230382734A1
公开(公告)日：2023-11-30
申请号：US18038836
申请日：2021-12-17
发明人： Bent VIGELAND , Halvor ØIEN , Ronald RÖSLER , André DE SMET , Peter FAUCONNIER
摘要： A mono-pressure plant for the production of nitric acid, comprising
an ammonia convertor configured for operating at a working pressure ranging between 2 bar and 16 bar, for oxidizing ammonia, thereby producing a gaseous NOx gas/steam mixture;
an air compressor in fluid communication with the ammonia convertor, for pressurizing air to the working pressure;
an absorber unit, wherein the nitrogen oxides contained in a gaseous NOx stream react with water, thereby producing nitric acid;
a first bleacher unit for stripping the dissolved nitrogen oxides from the output product stream, thereby producing a first NOx-loaded stripping gas; and
a means for directing the first NOx-loaded stripping gas to an inlet of the absorber unit.-
8.发明公开公开(公告)号：US20230357032A1
公开(公告)日：2023-11-09
申请号：US18026989
申请日：2021-09-24
发明人： Udaypal SINGH
CPC分类号： C01C1/0452 , C01C1/024 , C01C1/0488 , C01C1/0482
摘要： A method for heating a feed of natural gas, used as feed for a steam reformer of an ammonia production system, wherein the system comprises a steam reformer, operably connected to a heat recovery unit comprising at least two heating coils maintained at a different temperature, wherein the feed of natural gas passes through the at least two heating coils, the method comprising: a) recovering heat in the heat recovery unit from the ammonia production system and b) exchanging at least part of the heat recovered in step a) with at least a portion of the feed of natural gas, thereby obtaining a heated feed of natural gas, wherein the feed of natural gas does not comprise steam.
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公开(公告)号：US20230347258A1
公开(公告)日：2023-11-02
申请号：US18025758
申请日：2021-10-08
发明人： Lino Giovanni PORRO , Adrian BYNES
IPC分类号： B01D1/30 , B01D1/06 , B01D19/00 , C07C273/16 , C07C273/04 , B01J4/00
CPC分类号： B01D1/30 , B01D1/065 , B01D19/0021 , C07C273/16 , C07C273/04 , B01J4/008 , B01J4/005 , B01J2204/005
摘要： A bottom chamber of a stripper (or bottom liquid holder) including a vortex breaker, a blocking plate and a guiding plate. A stripper, a urea HP stripper, a urea plant, a method for operating a stripper and a method for producing a solid, particulate urea-based composition.
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公开(公告)号：US11767240B2
公开(公告)日：2023-09-26
申请号：US17274157
申请日：2019-09-17
IPC分类号： C02F1/44 , C02F1/467 , C02F101/12 , C02F103/34
CPC分类号： C02F1/445 , C02F1/4674 , C02F1/4678 , C02F2101/12 , C02F2103/34 , C02F2201/461 , C02F2301/08
摘要： The present application relates to a method for removing a contaminant from wastewater from industrial fertilizer plant. The method comprises the steps of concentrating the wastewater, of electrolyzing the wastewater and of recirculating the electrolyzed wastewater to the fertilizer plant. The present application further relates to a system arranged to perform the method according to the present application.
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