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公开(公告)号：US5871703A
公开(公告)日：1999-02-16
申请号：US948268
申请日：1997-10-09
IPC分类号： B01D53/32 , B01D53/73 , B03C3/013 , B03C3/016 , B03C3/16 , C01B17/74 , C01B21/38 , C01G13/02 , F01N3/01 , F23J15/00 , F23J15/02 , C25B1/22 , B01D53/60 , B01D53/64
CPC分类号： B01D53/32 , B01D53/73 , B03C3/013 , B03C3/016 , B03C3/16 , C01B17/74 , C01B21/38 , C01G13/02 , F01N3/01 , F23J15/006 , F23J15/025 , B01D2257/302 , B01D2257/404 , B01D2257/602 , F23J2215/10 , F23J2215/20 , F23J2215/60 , F23J2217/102 , F23J2217/40 , F23J2217/60 , Y02T10/20
摘要： A process and apparatus for reducing particulate, nitrogen oxides ("NOx"), sulfur dioxide ("SO.sub.2 "), and mercury ("Hg") emissions from the combustion exhaust of fossil fuel fired plants while producing an end product that is commercially useful, comprising the steps of oxidizing Hg, NOx and SO.sub.2 using a barrier, pulse, corona, or electron beam electrical discharge apparatus to produce HgO and the acids HNO.sub.3 and H.sub.2 SO.sub.4, collecting the HgO, acids and particulates in a wet ESP, and separating the particulates from the collected acid mixture, then separating and concentrated the acids for industrial use.
摘要翻译： 一种用于在生产商业上有用的最终产品的同时，从化石燃料燃烧厂的燃烧废气中还原微粒，氮氧化物（“NOx”），二氧化硫（“SO2”）和汞（“Hg”）排放物的方法和装置 包括使用屏障，脉冲，电晕或电子束放电装置氧化Hg，NO x和SO 2以产生HgO和酸HNO 3和H 2 SO 4的步骤，在湿式ESP中收集HgO，酸和微粒，并分离 从收集的酸混合物中得到颗粒，然后分离和浓缩工业用酸。
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公开(公告)号：US5690900A
公开(公告)日：1997-11-25
申请号：US729250
申请日：1996-10-10
申请人： Radmil Smojver
发明人： Radmil Smojver
CPC分类号： B01J37/0244 , B01J23/83 , B01J23/894 , C01B21/265
摘要： A catalyst composition for oxidation of ammonia in the production of nitric acid incorporates a porous ceramic structure which is at least partially coated, the coating including a layer containing alumina, zirconium and cerium, a layer containing cobalt, cerous zirconium and optionally manganese, and a layer containing platinum.
摘要翻译： 在硝酸生产中用于氧化氨的催化剂组合物包含至少部分涂覆的多孔陶瓷结构，涂层包括含有氧化铝，锆和铈的层，含有钴，铈锆和任选的锰的层，以及 含铂层。
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63.发明授权Method of reducing the emission of NO.sub.x gas from a liquid containing nitric acid 失效减少含有硝酸液体的NOx气体排放的方法
公开(公告)号：US4938838A
公开(公告)日：1990-07-03
申请号：US094808
申请日：1987-09-10
申请人： Ivan Dalin , Pia Andreasson
发明人： Ivan Dalin , Pia Andreasson
摘要： A method of reducing, by the addition of hydrogen peroxide, the emission of NO.sub.x gas in the treatment of a nitric acid-containing liquid is disclosed. In the method the redox potential of the liquid is measured and the amount of added hydrogen peroxide is adjusted in relation to the redox potential.
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64.发明授权Method of preventing escape of nitrogen oxides from an aqueous nitrate solution 失效防止氮氧化物从硝酸水溶液中逸出的方法
公开(公告)号：US4138470A
公开(公告)日：1979-02-06
申请号：US826639
申请日：1977-08-22
申请人： Donald W. Bolme
发明人： Donald W. Bolme
摘要： Nitric oxide may be removed from gases which it is admixed by contacting the gases with aqueous solutions containing nitrate ions in sufficient concentration to oxidize the nitric oxide to nitrous acid and to retain it in the solution under stable conditions. Other oxides of nitrogen can also be absorbed producing nitrous acid which is retained in the aqueous solution in a similar manner. Thereafter, the scrubbing solution is regenerated under controlled conditions, producing a gas stream which contains the recovered nitrogen oxides in relatively high concentration and a scrubbing solution which can be recycled. The recovered nitrogen oxides may be used in the manufacture of nitric acid or other compounds or decomposed into harmless gases.
摘要翻译： 通过使气体与含有足够浓度的硝酸根离子的水溶液接触，将一氧化氮从气体中除去，从而将一氧化氮氧化成亚硝酸并将其保持在稳定条件下的溶液中。 还可以吸收其它的氮氧化物，以类似的方式产生保留在水溶液中的亚硝酸。 此后，洗涤溶液在受控条件下再生，产生含有较高浓度的回收的氮氧化物的气流和可回收的洗涤溶液。 回收的氮氧化物可用于制造硝酸或其他化合物或分解成无害气体。
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65.发明授权
公开(公告)号：US4028425A
公开(公告)日：1977-06-07
申请号：US691912
申请日：1976-06-01
申请人： Everett E. Gilbert
发明人： Everett E. Gilbert
IPC分类号： C01B21/38 , C07C205/06 , C07C79/10
CPC分类号： C01B21/38 , C07C201/08
摘要： Dinitrotoluene and nitric acid are concurrently produced by continuously roducing toluene, nitrogen dioxide and oxygen in a molar ratio of at least 4 mols nitrogen dioxide and 1 mol oxygen per mol toluene into a reaction zone containing a reaction medium comprising dinitrotoluene and 93-103% nitric acid, maintaining the resulting mixture of toluene, nitrogen dioxide, oxygen and reaction medium under a pressure of at least 100 psig and at a temperature up to about 100.degree. C. until a reaction product containing dinitrotoluene and 93-103% nitric acid in the ratio of about 1 mol dinitrobenzene and 2 mols nitric acid is produced, and continuously removing said reaction product from the reaction zone.
摘要翻译： 二硝基甲苯和硝酸同时通过将摩尔比为至少4摩尔二氧化氮和1摩尔氧/摩尔甲苯的甲苯，二氧化氮和氧气连续引入到含有二硝基甲苯和93-103％硝酸的反应介质的反应区中 在至少100psig的压力和高达约100℃的温度下保持所得到的甲苯，二氧化氮，氧气和反应介质的混合物，直至含有二硝基甲苯和93-103％硝酸的反应产物在 产生约1摩尔二硝基苯和2摩尔硝酸的比例，并从反应区中连续除去所述反应产物。
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公开(公告)号：US20230182104A1
公开(公告)日：2023-06-15
申请号：US18080023
申请日：2022-12-13
发明人： David S. Soane
CPC分类号： B01J19/088 , B01J19/126 , C01C1/0494 , C01B21/38 , B01J2219/0896 , B01J2219/0869 , B01J2219/0875 , B01J2219/0884
摘要： The invention includes a system for producing a nitrogen fixation product, where the system includes a nitrogen gas source providing nitrogen gas; a delivery system for the nitrogen gas in fluid communication with the nitrogen gas source, wherein the delivery system delivers the nitrogen gas into a plasma reactor, and wherein the plasma reactor energizes the nitrogen gas as a plasma to produce activated nitrogen species; a secondary reactant source providing a secondary reactant in a secondary reactant stream that is separated from the nitrogen gas, wherein the secondary reactant stream is directed to contact the activated nitrogen species in a reaction zone, and wherein contact between the activated nitrogen species and the secondary reactant produces a reaction that yields the nitrogen fixation product. The invention also includes methods of the use of such a system for producing a nitrogen fixation product.
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公开(公告)号：US20230064758A1
公开(公告)日：2023-03-02
申请号：US17792710
申请日：2021-01-08
申请人： Galip AKAY
发明人： Galip AKAY
IPC分类号： B01J23/00 , B01J23/02 , B01J23/14 , B01J23/889 , B01J23/78 , B01J23/86 , B01J21/08 , B01J37/34 , B01J37/02 , B01J35/02 , C01B21/38 , C01B3/06 , C01C1/04 , C05C11/00
摘要： Disclosed is the synthesis of novel supported metal catalytic materials for electromagnetic radiation absorption and chemical catalysis especially in the presence of plasma used in the conversion of nitrogen from air and hydrogen from water to useful products such as nitric acid, hydrogen, ammonia and fertilizers. These materials can also generate plasma when subjected to microwave irradiation thus form the basis of catalytic plasma reactors. They can be used in chemical looping reactions because plasma generation under microwave irradiation in air results in the reduction of catalyst oxides and oxidation of nitrogen.
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公开(公告)号：US20230038954A1
公开(公告)日：2023-02-09
申请号：US17791881
申请日：2020-12-21
发明人： Paul KERN
摘要： A process for producing nitric acid by the Ostwald process involves reacting ammonia with atmospheric oxygen as primary air to afford a NOx-containing gas stream in an ammonia oxidation reactor at a first pressure and absorbing the NOx-containing gas stream in water in an absorption apparatus at a higher, second pressure. Nitric acid is bleached with bleach air as secondary air at approximately the first pressure. The secondary air is brought to an operating pressure of the bleaching operation via a separate secondary air compressor or compressor stage. The separate secondary air compressor is independent of the compressor that brings the primary air to the first pressure. Compression to the second higher pressure at which the absorption of the NOx gases is performed in the absorption apparatus is provided only downstream of the bleaching operation.
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公开(公告)号：US20190134559A1
公开(公告)日：2019-05-09
申请号：US16095367
申请日：2017-04-21
摘要： The invention relates to a method for generating a product gas stream (G), comprising the steps: provision of a process gas stream (P), generation of a reactive gas stream (R) from the process gas stream (P) at reduced pressure, provision of a compressed gas stream (D) and mixing the reactive gas stream (R) with the compressed gas stream (D) with formation of a product gas stream (G).The invention further relates to an apparatus (1) for generating a product gas stream (G), comprising a discharge chamber (2), a compressed gas line (12), a reactive gas line (11), which is realized separately from the compressed gas line (12), a product gas line (13) and a mixing chamber (3), which can be brought into flow connection with the compressed gas line (12) and the reactive gas line (11) in such a way, in that, in the mixing chamber (3), the compressed gas stream (D) can be mixed with the reactive gas stream (R) to form a product gas stream (G), wherein the mixing chamber (3) can be brought into flow connection with the product gas line (13) in such a way that the product gas stream (13) can be discharged from the apparatus (1) by means of the product gas line (13).
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公开(公告)号：US10280085B2
公开(公告)日：2019-05-07
申请号：US15782158
申请日：2017-10-12
发明人： Daniel Birke
摘要： A process for preparing nitric acid may involve vaporizing ammonia in at least one first ammonia vaporizer to produce an ammonia gas, oxidizing this ammonia gas to nitrogen dioxide in a plant section of a nitric acid plant, and absorbing the nitrogen dioxide in water to produce nitric acid. A residual gas containing nitrous gases may be taken off from the plant section of the nitric acid plant and conveyed to a residual-gas cleaning apparatus. The residual gas containing nitrous gases may be reduced by means of ammonia in the residual-gas cleaning apparatus, wherein ammonia-containing wastewater obtained in the at least one first ammonia vaporizer may be conveyed to the residual-gas cleaning apparatus. Such a process may eliminate or at least substantially reduce ammonia-containing wastewater. Furthermore, a plant can be used in this process for preparing nitric acid.
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