公开(公告)号：US20240343576A1

公开(公告)日：2024-10-17

申请号：US18291820

申请日：2022-08-25

Applicant: Yara International ASA

Inventor： Bent VIGELAND ,  Halvor ØIEN ,  Peter FAUCONNIER ,  Andre DE SMET

IPC: C01B21/28 ,  B01D53/56

CPC classification number: C01B21/28 ,  B01D53/56 ,  B01D2257/404 ,  B01D2258/02

Abstract: A system for producing nitric acid at reduced power, the system being a standard mono pressure nitric acid plant wherein the system further includes features for splitting a tail gas 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, features for pressurizing a gas downstream the absorption tower, such that an air compressor is not required. A method for operating the system, the use of the system for performing the method, and a method for revamping a standard mono pressure nitric acid plant into the system.

公开(公告)号：US20240002231A1

公开(公告)日：2024-01-04

申请号：US18253983

申请日：2021-10-20

Applicant: CASALE SA

Inventor： Enrico RIZZI

IPC: C01B21/28 ,  C01B21/40 ,  B01J23/42 ,  B01J23/46 ,  B01J35/04 ,  F28C3/02

CPC classification number: C01B21/28 ,  C01B21/40 ,  B01J23/42 ,  B01J23/464 ,  B01J35/04 ,  F28C3/02

Abstract: An ammonia burner comprising an ammonia section for ammonia oxidation and a combined heat exchange section for heating a process stream, wherein said ammonia section and heat exchange section are coaxially arranged in a pressure vessel of the burner and the hot nitrogen oxides-containing effluent gas from the ammonia section is directed to a shell side of the heat exchange section so that said effluent gas transfers heat to the process stream.

公开(公告)号：US11820653B2

公开(公告)日：2023-11-21

申请号：US16534044

申请日：2019-08-07

Applicant: THYSSENKRUPP INDUSTRIAL SOLUTIONS AG

Inventor： Meinhard Schwefer ,  Rolf Siefert ,  Klaus Ruthardt ,  Alberto Cremona ,  Edoardo Vogna

IPC: C01B21/26 ,  B01J23/34 ,  B01J23/83 ,  B01J23/00 ,  B01J23/843 ,  B01J23/86 ,  B01J23/889 ,  B01J37/03 ,  C01B21/38 ,  C01B21/28 ,  B01J35/04 ,  B01J37/00 ,  B01J37/08

CPC classification number: C01B21/265 ,  B01J23/002 ,  B01J23/34 ,  B01J23/83 ,  B01J23/8437 ,  B01J23/86 ,  B01J23/8892 ,  B01J37/036 ,  C01B21/28 ,  C01B21/38 ,  B01J35/04 ,  B01J37/0018 ,  B01J37/0036 ,  B01J37/033 ,  B01J37/082 ,  C01P2002/34

Abstract: A system suitable for oxidizing ammonia with oxygen in the presence of catalysts is described. The system includes a reactor equipped with at least one supply line for a reactant gas mixture and at least one discharge line for a process gas; a catalyst comprising at least one transition metal oxide that is not an oxide of a platinum metal; and a device for adjusting a molar ratio of oxygen to ammonia of less than or equal to 1.75 mol/mol in the reactant gas mixture by mixing an oxygen-containing gas stream having an O2 content of

公开(公告)号：US10744473B2

公开(公告)日：2020-08-18

申请号：US15505438

申请日：2015-08-17

Applicant: THE ALLOY ENGINEERING COMPANY

Inventor： F. Burke Allen

IPC: B01J8/02 ,  C01B21/28 ,  C01B21/26

Abstract: An ammonia oxidation catalyst basket design has two support grids. A first grid supports the primary catalyst and a separate, second grid supports the secondary catalyst. This dual grid design separates the two catalysts, and enables the catalysts to be independent of each other. Any interruption in the primary or the secondary catalyst does not impede or adversely impact on the structure or function of the other catalyst.

公开(公告)号：US20200071167A1

公开(公告)日：2020-03-05

申请号：US16491965

申请日：2018-02-01

Applicant: Casale SA

Inventor： Iacopo Cerea ,  Jean François Granger

IPC: C01B21/46 ,  C01B21/28 ,  B01D53/56 ,  B01D53/78 ,  B01D53/14

Abstract: A dual-pressure plant for the synthesis of nitric acid comprising: a reactor (4) providing a gaseous effluent (15) containing nitrogen oxides; an absorption tower (6) nitrogen oxides react with water providing raw nitric acid and, said absorption tower operating at a pressure greater than the pressure of the reactor; a compressor (5) elevating the pressure of the reactor effluent (15) to the absorption pressure; said plant also comprising a first bleacher (37) and a second bleacher (7), said first bleacher (37) stripping with air (39) nitrogen oxides from the output stream (27) of the absorption tower (6) providing a partially stripped nitric acid stream (40) and a nitrogen oxides-loaded air stream (41), the former being fed to the second bleacher (7) and the latter being recycled to the delivery-side of said compressor (5).

公开(公告)号：US20190337804A1

公开(公告)日：2019-11-07

申请号：US16479518

申请日：2018-01-18

Applicant: thyssenkrupp Industrial Solutions AG ,  thyssenkrupp AG

Inventor： Paul KERN

IPC: C01B21/26 ,  C01B21/28

Abstract: A process and a plant for producing nitric acid involves oxidizing ammonia in the presence of catalysts to provide nitrogen monoxide-containing process gas in an oxidation reactor. The formed nitrogen monoxide may be supplied with oxygen-containing gas, and nitrogen monoxide is oxidized to provide nitrogen dioxide that is reacted with water in an absorption apparatus to give nitric acid, nitrous acid, and/or solutions of nitrates and/or nitrites. Oxidation of the nitrogen monoxide may be effected in an additional reactor positioned between the oxidation reactor and the absorption apparatus and traversed by the process gas. The oxidation of the nitrogen monoxide may be effected in an additional reactor parallel and connected to the absorption apparatus and traversed by the process gas. The disclosed processes and plants feature a high energy efficiency combined with a simple construction, and existing plants are easily upgradeable.

公开(公告)号：US10308510B2

公开(公告)日：2019-06-04

申请号：US15528710

申请日：2015-11-10

Applicant: ThyssenKrupp Industrial Solutions AG ,  ThyssenKrupp AG

Inventor： Jürgen Fuchs ,  Klaus Ruthardt

IPC: B01J8/00 ,  B01J8/02 ,  B01J19/00 ,  B01J19/24 ,  C01B21/26 ,  C01B21/28

Abstract: A burner basket for an ammonia oxidation burner includes a gas-permeable bottom plate, with a side wall that is spaced apart from the bottom plate by a gap, and a retaining device covering the bottom plate and the gap for retaining particles of a bulk material that can be arranged in the burner basket. A fastening element is arranged on the bottom plate, by which the retaining device is fixed in place. An ammonia oxidation burner comprises a burner for oxidizing ammonia and a burner basket.

公开(公告)号：US09953370B2

公开(公告)日：2018-04-24

申请号：US14204142

申请日：2014-03-11

Applicant: Eagle View Technologies, Inc.

Inventor： Chris Pershing ,  Randall Ishikawa

IPC: G06Q40/08 ,  C01B21/28 ,  G06Q40/00 ,  G06Q10/06 ,  G06Q50/16

CPC classification number: G06Q40/08 ,  C01B21/28 ,  G01B21/28 ,  G06Q10/06 ,  G06Q40/00 ,  G06Q50/16

Abstract: System and methods for performing a risk management assessment of a property using at least aerial imagery of the property and additional data about the property that is evaluated against risk management criteria. Data acquired through aerial imagery includes identifying buildings and floor area of the buildings, condition of the buildings including roof and exterior walls, and identifying other property hazards. Additional data may include property information coming from multiple sources including city and County governments, contractors and insurance companies. The resulting risk management assessment may be used to settle insurance claims and to determine insurance products and premium rates offered on the property.

公开(公告)号：US09242216B2

公开(公告)日：2016-01-26

申请号：US14343696

申请日：2012-09-07

Applicant: Juergen Fuchs

Inventor： Juergen Fuchs

IPC: B01J8/00 ,  C01B21/28 ,  B01J8/02 ,  C01B21/26 ,  B01J19/00

CPC classification number: B01J8/008 ,  B01J8/0257 ,  B01J19/0053 ,  B01J2208/00884 ,  B01J2219/00018 ,  B01J2219/00761 ,  C01B21/267 ,  C01B21/28 ,  Y10T29/49348

Abstract: Burner basket system for ammonia oxidation burners for industrial plants with burner diameters of 2-7 m in a natural- or forced-circulation boiler suitable for minimizing gas slip and for minimizing wave formation contents in the burner basket and loss of contents in the burner basket, wherein the burner basket has a wall anchored in the ammonia oxidation burner and the burner basket has a gas-permeable bottom plate, placed on internal fittings of the forced circulation boiler, wherein the wall and the gas-permeable bottom plate are not mechanically connected to each other, and the wall of the burner basket tapers conically towards the bottom plate at an angle of 5-20° from the perpendicular, and in all operating states of the ammonia oxidation burner there is a peripheral gap in the range from 5 to 10 mm between the wall and the gas-permeable bottom plate.

Abstract translation: 用于工业设备的燃烧器篮子，用于在自然或强制循环锅炉中燃烧器直径为2-7米的工业设备，适用于最小化气体滑移并最大限度地减少燃烧器篮中的波浪形成含量和燃烧器筐中的内容物损失 ，其中燃烧器筐具有锚定在氨氧化燃烧器中的壁，并且燃烧器筐具有放置在强制循环锅炉的内部配件上的透气底板，其中壁和气体可渗透的底板不机械连接 并且燃烧器筐的壁以垂直方向以5-20°的角度向底板锥形锥形，并且在氨氧化燃烧器的所有操作状态中，存在从5到 壁与透气底板之间为10mm。

公开(公告)号：US20150030521A1

公开(公告)日：2015-01-29

申请号：US14383018

申请日：2013-02-22

Applicant: BASF SF

Inventor： Robert A. Fox

IPC: C01B21/26 ,  C01B21/28 ,  B01J8/02

CPC classification number: C01B21/267 ,  B01J8/006 ,  B01J8/02 ,  B01J8/025 ,  B01J8/0285 ,  B01J12/007 ,  B01J2208/00203 ,  B01J2208/027 ,  B01J2219/00024 ,  C01B21/28

Abstract: A reaction vessel for oxidation of ammonia to nitrogen monoxide in the presence of a catalyst is provided. The catalyst can become dislodged during the oxidation. The reaction vessel includes a reactor body having a top portion, a bottom portion, and a middle portion. The top and middle portions cooperate to define a cavity where the ammonia is catalytically oxidized to provide the nitrogen monoxide. The reaction vessel also includes an internal filter element. The internal filter element includes a filter cage that defines an interior volume and a filter medium disposed adjacent to the filter cage. The internal filter element collects the catalyst dislodged during the oxidation.

Abstract translation: 提供了在催化剂存在下将氨氧化成一氧化氮的反应容器。 催化剂在氧化过程中会脱落。 反应容器包括具有顶部，底部和中间部分的反应器主体。 顶部和中间部分配合以限定其中氨被催化氧化以提供一氧化氮的空腔。 反应容器还包括内部过滤元件。 内部过滤器元件包括限定内部容积的过滤器保持架和邻近过滤器保持架设置的过滤介质。 内部过滤元件收集在氧化过程中脱落的催化剂。