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公开(公告)号：US20250011171A1
公开(公告)日：2025-01-09
申请号：US18292739
申请日：2022-08-25
Applicant: YARA INTERNATIONAL ASA
Inventor： Bent VIGELAND , Halvor ØIEN , Krzysztof BANASIAK , Andre DE SMET , Peter FAUCONNIER
Abstract: A production plant for producing nitric acid at reduced power, the system derived from a state-of-the art mono pressure nitric acid plant wherein the system further includes a first feature for splitting a tail gas stream into a first tail gas stream in fluid communication with an oxygen-rich gas and with compressed air and a second tail gas stream, and/or a second feature for splitting a tail gas stream into a third tail gas stream in fluid communication with an oxygen-rich gas and with compressed air and a fourth tail gas stream, a feature for pressurizing a gas downstream the absorption tower. The production plant allows for reduction of power by the air compressor. A method for operating the system, the use of the system for performing the method of the disclosure, and a method for revamping a state-of-the art mono pressure nitric acid plant into the system.
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公开(公告)号：US20240367976A1
公开(公告)日：2024-11-07
申请号：US18291653
申请日：2022-08-25
Applicant: Yara International ASA
Inventor： Bent VIGELAND , Halvor ØIEN , Krzysztof BANASIAK , Andre DE SMET , Peter FAUCONNIER
Abstract: A system for producing nitric acid at reduced power consumption including an air compressor, to provide in a compressed air stream; a source of pressurized oxygen-rich gas having a pressure higher than the pressure of the compressed air stream; a mixing apparatus for mixing the oxygen-rich gas/compressed air stream mixture with an ammonia gas stream; an ammonia converter, to provide in a NOx gas/steam mixture; a water cooler/condenser for separating and condensing steam from NOx gas in the gaseous NOx gas/steam mixture; a NOx gas compressor, for compressing the gaseous NOx stream; an absorption tower downstream the water cooler/condenser, to provide in a stream of raw nitric acid-containing residual NOx gas and a tail gas including NOx gases; a mechanism for splitting the tail gas into a first tail gas stream and a second tail gas stream; and a mechanism for adjusting the amount of tail gas being split.
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3.发明公开公开(公告)号：US20230378507A1
公开(公告)日：2023-11-23
申请号：US18014624
申请日：2021-07-07
Applicant: Yara International ASA
Inventor： David WALLER , Egil RASTEN , Yngve LARRING
IPC: H01M8/126 , H01M4/88 , H01M8/22 , H01M4/90 , H01M8/1253 , H01M8/04089 , H01M8/06 , H01M8/2425 , C01B21/40
CPC classification number: H01M8/126 , H01M4/8807 , H01M8/222 , H01M4/9033 , H01M8/1253 , H01M8/04089 , H01M8/06 , H01M8/2425 , C01B21/40 , H01M2008/1293
Abstract: A method for the combined production of electricity and nitric oxide,: comprising the steps of: providing an SOFC comprising an anodic side comprising a solid gas-permeable anode, a gas inlet and a gas outlet, a cathodic side comprising a solid gas-permeable cathode and a gas inlet and a gas outlet, and a fully dense solid electrolyte, separating the cathodic side from the anodic side; introducing an oxygen-containing gas in the inlet of the cathodic side of the SOFC; introducing an ammonia-containing gas stream in the inlet of the anodic side of the SOFC; collecting nitric oxide at the outlet of the anodic side and collecting a current flowing between the anodic side and the cathodic side.
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公开(公告)号：US20230202845A1
公开(公告)日：2023-06-29
申请号：US17919794
申请日：2021-04-28
Applicant: Yara International ASA
Inventor： Halvor ØIEN
CPC classification number: C01B21/40 , B01J19/32 , B01D53/185 , B01D53/1456 , B01D53/56 , B01D53/78 , B01J2219/32213 , B01J2219/32255 , B01J2219/32408 , B01D2252/103
Abstract: A vertical absorption column comprising a liquid distributor comprising a feed box having a serrated weir for distribution of a liquid through upward-pointing serrations of the serrated weir into perforated trays of the liquid distributor and located directly above a structured packing, a structured packing, a plate packing comprising a plurality of horizontal plates, provided with cooling means, an inlet for the addition of oxygen to the lower part of the vertical absorption column, an inlet for the process gas comprising nitrogen oxides from an ammonia oxidation process at the lower part of the vertical absorption column, an inlet for an aqueous solution at the upper part of the vertical absorption column, at least one nitric acid outlet at the bottom of the vertical absorption column and an outlet for tail gas comprising nitrogen oxides at the top of the vertical absorption column.
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公开(公告)号：US20210179527A1
公开(公告)日：2021-06-17
申请号：US17123004
申请日：2020-12-15
Applicant: Evonik Fibres GmbH
Inventor： Harald RÖGL
IPC: C07C51/275 , C07C51/43 , C01B21/40 , B01J3/02 , B01J19/00
Abstract: In a method for oxidizing 1,1-bis-(3,4-dimethylphenyl)-alkane with nitric acid in a pressure vessel to produce 3,3′,4,4′-benzophenone tetracarboxylic acid with concurrent formation of nitric oxide, passing nitric oxide from the pressure vessel into an absorption vessel and reacting nitric oxide in the absorption vessel with molecular oxygen and water to produce an aqueous nitric acid solution prevents discharge of nitric oxide, avoids the risk of oxygen inhibiting the nitric acid oxidation and reduces nitric acid consumption when the nitric acid from the absorption vessel is used for oxidizing the 1,1-bis-(3,4-dimethylphenyl)-alkane.
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Patent Agency Ranking
公开(公告)号：US20190218097A1
公开(公告)日：2019-07-18
申请号：US15768510
申请日：2017-09-19
Applicant: Stamicarbon B.V.
CPC classification number: C01B21/40 , B01D53/002 , B01D53/14 , B01D53/1493 , B01D53/8625 , B01D53/8631 , B01D2252/103 , B01D2257/404 , C01B21/26 , Y02C20/20
Abstract: Disclosed is a dual pressure plant for the production of nitric acid on the basis of the oxidation of ammonia. The plant comprises a reactor configured to produce a burner gas stream; a gas cooling section configured to form a cooled burner gas; a condensation section configured to form an aqueous nitric acid condensate and an uncondensed nitrogen oxides gas stream; an absorption section configured to produce raw nitric acid and a tail gas; and a tail gas treatment system configured to form a purified tail gas. In a tail gas heating section a further heat exchanger configured to receive heat from the burner gas stream, said further heat exchanger being positioned relatively close to the reactor.
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公开(公告)号：US08784762B2
公开(公告)日：2014-07-22
申请号：US13027312
申请日：2011-02-15
Applicant: James A. Moore
Inventor： James A. Moore
CPC classification number: B01D53/8631 , B01D53/56 , B01D2251/104 , C01B21/40 , C23G1/02
Abstract: Methods and systems for treating a gas stream comprising NOx are disclosed. In one embodiment of the method, the gas stream comprising NOx is reacted with ozone to form oxidation products including nitrogen sesquioxide and nitrogen pentoxide. At least a portion of the nitrogen sesquioxide and nitrogen pentoxide is reacted with water to form nitric acid, and a solubilized form of the nitric acid is collected and may be reused or otherwise utilized. Systems for conducting the method also are disclosed.
Abstract translation: 公开了用于处理包含NOx的气流的方法和系统。 在该方法的一个实施方案中，包含NOx的气流与臭氧反应以形成包括三氧化二氮和五氧化二氮的氧化产物。 将至少一部分的三氧化二氮和五氧化二氮与水反应以形成硝酸，并且收集溶解的硝酸形式并且可以重复使用或以其他方式利用。 还公开了用于进行该方法的系统。
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公开(公告)号：US4705670A
公开(公告)日：1987-11-10
申请号：US772137
申请日：1985-09-03
Applicant: Louis R. O'Hare
Inventor： Louis R. O'Hare
CPC classification number: B01J19/088 , C01B21/32 , C01B21/40 , Y10S422/904
Abstract: The electric fixation of nitrogen from air is enhanced and made more efficient by the simultaneous multiple use of the electric discharge for both reacting nitrogen and oxygen to nitric oxide and for generating other specific oxidizing agents for the further oxidation of nitric oxide to higher oxides in that this special cell thereby rapidly effects not only the oxidation of nitrogen to nitric oxide but also rapidly oxidizes that nitric oxide to higher oxides of nitrogen products and thereby provides a means for the rapid absorption of the fixed nitrogen products from the electric discharge zone where the discharge would otherwise destroy much of the same product nitrogen which it is generating. The rapidly soluble higher oxides of nitrogen are rapidly absorbed by and held in an aqueous solution of these products flowing within the cell and they are converted directly to nitric acid in the solution as it flows from the cell.
Abstract translation: 通过同时多次使用氮氧化合物的放电与一氧化氮的同时多次使用，并产生其它特定的氧化剂，以使一氧化氮进一步氧化成高氧化物 这种特殊的电池不仅可以迅速地将氮氧化成一氧化氮，而且还可以将一氧化氮迅速氧化成氮产物的高级氧化物，从而提供了一种从放电区域放电的固体氮产物的快速吸收的方法 否则会破坏其产生的大部分相同的产品氮。 快速溶解的氮的较高氧化物被这些产物的水溶液迅速地吸收并保持在细胞内，并且当它们从细胞流出时直接转化为溶液中的硝酸。
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公开(公告)号：US4341747A
公开(公告)日：1982-07-27
申请号：US933694
申请日：1978-08-15
Applicant: Gale D. Downey
Inventor： Gale D. Downey
Abstract: Nitrogen oxides are removed from gaseous mixtures by treatment with an aqueous solution of nitric acid having a concentration by weight from about 35% to about 58% and containing by weight at least 0.001% but less than 25% of hydrogen peroxide whereby the nitrogen oxides are converted to nitric acid.
Abstract translation: 通过用浓度为约35％至约58％并含有至少0.001％但小于25％的过氧化氢的硝酸水溶液处理从气态混合物中除去氮氧化物，由此氮氧化物为 转化为硝酸。
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公开(公告)号：US4312852A
公开(公告)日：1982-01-26
申请号：US175925
申请日：1980-08-06
Applicant: John L. Dewey
Inventor： John L. Dewey
CPC classification number: C01B21/40
Abstract: There is described a process for the reconstitution of NO.sub.X gases produced by the thermal decomposition of metal nitrates to nitric acid comprising the steps of:1. contacting the NO.sub.X gases in counter-current relationship in one or more packed columns with cooled 50 to 60 percent nitric acid to remove as nitric acid a major portion of the originally introduced NO.sub.X values and provide an acid solution leaving the column having a temperature below about 180.degree. F. to remove as nitric acid a major portion of the originally introduced NO.sub.X values;2. compressing the residual gases from step 1 to from about 2 to about 6 atmospheres absolute;3. contacting the compressed gases from step 2 with from about 50 to about 60 percent nitric acid in a packed absorption column in counter-current relationship to remove substantially all of the remaining NO.sub.X values from the gas stream as HNO.sub.3 ; and4. recovering 50-60% nitric acid as it accumulates.
Abstract translation: 描述了通过将金属硝酸盐热分解产生的NO x气体重构为硝酸的方法，包括以下步骤：1.将一种或多种填充柱中的NOX气体以逆流关系与冷却的50至60％ 硝酸作为最初引入的NOX值的主要部分硝酸除去，并提供离开柱子的酸溶液，其温度低于约180°F，以除去作为最初引入的NOX值的主要部分的硝酸; 2.将来自步骤1的残余气体压缩至约2至约6大气压绝对值; 3.将来自步骤2的压缩气体与填充吸收塔中的约50％至约60％的硝酸以逆流关系接触，从而从气流中基本上除去所有剩余的NO x值，作为HNO 3; 并回收50-60％的硝酸积累。
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