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12.发明公开VERFAHREN ZUR BESEITIGUNG VON N2O UND NOX AUS DEM PROZESS ZUR SALPETERSÄUREHERSTELLUNG UND DAFÜR GEEIGNETE ANLAGE 有权程序的去除NOx N2O和过程OUT硝酸生产和合适的投资
公开(公告)号：EP2678270A1
公开(公告)日：2014-01-01
申请号：EP12706771.8
申请日：2012-02-14
CPC分类号： C01B21/40 , B01D53/8628 , B01D53/869 , B01D2255/2065 , B01D2255/20738 , B01D2255/20746 , B01D2255/20761 , B01D2255/502 , B01D2255/504 , B01D2257/402 , B01D2257/404 , B01J29/072 , B01J29/46 , B01J29/68 , B01J29/7615 , B01J2229/42 , C01B21/265 , C01B21/38 , Y02C20/10 , Y02P20/153
摘要： The invention relates to a method for producing nitric acid by catalytically oxidising NH
3 with oxygen and then reacting the obtained ΝΟ
x with an absorption agent in an absorption tower, said tower comprising a catalyst bed for N
2 O decomposition arranged in the process gas after the catalytic NH
3 oxidation and before the absorption tower in the direction of flow, and a catalyst bed for ΝΟ
x reduction and further N
2 O reduction, arranged in the residual gas after the absorption tower in the direction of flow. In the catalyst bed for N
2 O decomposition that is arranged in the process gas, as much N
2 O as possible is broken down such that before the residual gas enters the catalyst bed for ΝΟ
x reduction, the N
2 O content is at > 100 ppmv and a molar N
2 O/ΝΟ
x ratio of > 0.25 is the result; the catalyst bed for ΝΟ
x reduction and further N
2 O reduction, arranged in the residual gas, containing at least one zeolite catalyst loaded with iron; there being such an amount of NH
3 added to the residual gas prior to entry into the catalyst bed that upon exit from the catalyst bed, an ΝΟ
x concentration of 2 O concentration of 2 O, formed during the catalytic NH
3 oxidation, is catalytically removed in the process gas, with the ΝΟ
x content being reduced and the N
2 O content being further reduced in the residual gas, downstream of the absorption tower, and which is characterised in that at least the following elements are present: A) a reactor for the catalytic oxidation of NH
3 with oxygen to produce a process gas containing ΝΟ
x , B) an absorption tower for reacting the obtained ΝΟ
x from the process gas with an absorption agent, a residual gas containing ΝΟ
x and N
2 O being the result, C) at least one first catalyst bed for N
2 O decomposition through which the process gas flows and which is arranged after the catalytic NH
3 oxidation and before the absorption tower in the direction of flow, D) at least one second catalyst bed for ΝΟ
x reduction and further N
2 O reduction, through which the residual gas flows and which is arranged after the absorption tower in the direction of flow, E) at least one device, for feeding a gaseous reduction agent into the residual gas, arranged after the absorption tower and before the second catalyst bed in the direction of flow, F) the first catalyst bed containing a catalyst for decomposing N
2 O, and G) the second catalyst bed containing a catalyst which contains at least one zeolite loaded with iron. The method and installation allow N
2 O and ΝΟ
x emissions from nitric acid installations to be reduced in a particularly efficient manner.-
公开(公告)号：EP0301844A1
公开(公告)日：1989-02-01
申请号：EP88306939.5
申请日：1988-07-28
摘要： An improvement in the work generated by expanding hot gas from exothermic reaction processes featuring an excess of high temperature and carried out above atmospheric pressure is achieved by providing pressurised gas supplementary to that required or produced by the process operating under the full load condition, heating this supplementary gas with a portion of the available excess high temperature heat, and then expanding the gas to generate work. The amount of the supplementary gas is such that the total amount of gas expanded is greater than that amount of gas which would be available for expansion by operating the process at the full load condition without supplying the supplementary gas.
摘要翻译： 通过将放热反应过程特征是过高的高温并进行高于大气压的热气膨胀所产生的工作的改进是通过提供与在满载条件下运行的过程所需要或生产的补充气相加的加压气体来实现的， 补充气体与一部分可用的过剩高温热量，然后膨胀气体产生作业。 补充气体的量使得膨胀的气体总量大于通过在满载条件下操作而不能供应补充气体而可用于膨胀的气体量。
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公开(公告)号：EP4455079A1
公开(公告)日：2024-10-30
申请号：EP22909960.1
申请日：2022-12-19
发明人： ZHOU, Jun , WANG, Jining , ZHAO, Shiping , HAN, Fang , WANG, Junting , YANG, Lu , SUN, Lin , WU, Zhijun
IPC分类号： C01B21/38
摘要： Disclosed in the present application are an ammoxidation reactor and a method for producing nitric acid. In the present application, the ammoxidation reactor comprises: a housing and a top cover that covers the shell to form a hearth, wherein the hearth comprises a first space and a second space that are in communication in a vertical direction; a combustion unit, which is located in the first space and comprises a platinum net layer, wherein a combustion reaction is performed with the platinum net layer as a medium until the temperature of the platinum net layer enables ammonia gas entering the hearth to be oxidized to generate a nitric oxide; and a heat recovery unit. The heat recovery unit of the present application allows a high-temperature gas to be successively and uniformly distributed and to pass downwards in sequence, and the high-temperature gas is discharged after a heat exchange from top to bottom and enters a subsequent procedure. The heat recovery unit of the embodiments of the present application can recover heat energy and reduce the influence of a high temperature on the safety and reliability of the ammoxidation reactor.
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公开(公告)号：EP4392367A1
公开(公告)日：2024-07-03
申请号：EP22768822.3
申请日：2022-08-25
CPC分类号： C01B21/26 , C01B21/28 , C01B21/38 , F01K23/064 , Y02P20/129
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16.发明公开
公开(公告)号：EP4253365A3
公开(公告)日：2024-03-13
申请号：EP23186758.1
申请日：2019-10-17
申请人： PLINKE GmbH
IPC分类号： C01B17/88 , C01B17/90 , C01B17/94 , C01B21/38 , C07C201/16 , C07C201/08 , C07C205/06
摘要： In einem Verfahren zur Aufarbeitung von Mischsäure und Abwasser aus der Nitrierung von Aromaten, bei dem die enthaltene Salpetersäure durch Reaktion mit einem Aromaten unter adiabatischen Bedingungen umgesetzt wird, wird
a. mindestens eine Abfallstromkomponente ausgewählt aus bei der Nitrierung anfallender Abfallsäure (Mischsäure), saurem Waschwasser aus der Aufarbeitung von Rohnitroaromaten und dünner Salpetersäure, die bei einer Abgasbehandlung im Verlauf der Nitrierung anfällt, bereitgestellt,
b. die mindestens eine Abfallstromkomponente mit rückkonzentrierter Schwefelsäure gemischt,
c. ein Aromat in stöchiometrischem Überschuss bezogen auf die Salpetersäure in die Mischung eindosiert,
d. die erhaltene Reaktionsmischung in einem adiabatisch betriebenen Reaktor umgesetzt,
e. in einem Separator die erhaltene organische Phase von der schwefelsauren Phase getrennt,
f. die schwefelsaure Phase im Vakuum aufkonzentriert, und
g. zumindest ein Teilstrom der rückkonzentrierten Schwefelsäure aus Schritt g) in Schritt b) eingesetzt.-
17.发明公开
公开(公告)号：EP4310224A1
公开(公告)日：2024-01-24
申请号：EP22185672.7
申请日：2022-07-19
IPC分类号： C25B1/04 , C25B1/23 , C25B15/08 , C01B3/34 , C01B3/50 , C01B21/38 , C01B32/40 , C01B32/80 , C01C1/04 , C07C201/08 , C07C209/32 , C07C209/36 , C07C263/10 , C10K3/02
摘要： Die Erfindung betrifft ein Verfahren gemäß Anspruch 1, worin Salpetersäure als unmittelbares Verfahrensprodukt eines Verfahrens zur Salpetersäureherstellung, das mindestens folgende Schritte umfasst:
a) Bereitstellung von Wasserstoffgas (5d) und Sauerstoffgas (5b) durch Ausführung einer Wasserelektrolyse (5) in einer Elektrolysevorrichtung unter Einsatz von aus regenerativer Energie hergestellter elektrischer Energie (10) und Wasser (5c);
b) Bereitstellung von Ammoniak (21b) als Verfahrensprodukt einer Umsetzung von zumindest Stickstoff (21a) und Wasserstoffgas (5d) aus besagter Wasserelektrolyse (5) in einer Ammoniaksynthese (21);
c) Herstellung von Salpetersäure (22) durch Umsetzung von zuvor bereitgestelltem Ammoniak (21b) in einer Salpetersäure-Herstellung (22) zumindest mit Sauerstoffhaltigem Gas (5e),
zur Herstellung 22 organischer Aminoverbindungen 17 für die Synthese organischer Isocyanatverbindungen zum Einsatz kommt. Weiter wird die Einbindung dieses Verfahrens in ein Verfahren zur Herstellung organischer Isocyanatverbindungen mit diesen organischen Aminoverbindungen, sowie eine Vorrichtung zur Durchführung des entsprechenden Verfahrens beschrieben.-
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公开(公告)号：EP4209454A1
公开(公告)日：2023-07-12
申请号：EP22150921.9
申请日：2022-01-11
摘要： The present disclosure discloses a system for producing nitric acid at reduced power, the system being a standard mono pressure nitric acid plant characterised in that the system further comprises means for splitting ( 55 ) the tail gas ( 5 ) into a first tail gas stream ( 52 ) in fluid communication with an oxygen-rich gas ( 50 ) upstream the ammonia mixing unit ( 35 ), and a second tail gas stream ( 74 ), means for pressurising a gas ( 53 ) downstream the absorption tower ( 10 ), and means for adjusting the amount of tail gas ( 5 ) being splitted into the first tail gas stream ( 52 ) and the second tail gas stream ( 74 ), such that an air compressor ( 36 ) is not required. The present disclosure further relates to a method for operating the system, to the use of the system of the disclosure for performing the method of the disclosure and to a method for revamping a standard mono pressure nitric acid plant into the system of the disclosure.
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公开(公告)号：EP3680214B1
公开(公告)日：2021-08-25
申请号：EP19151608.7
申请日：2019-01-14
发明人： Boll, Willi , Maier, Dirk
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