EP2785428A1 - Conduite de recueillement de condensat pour des colonnes de distillation - Google Patents

Conduite de recueillement de condensat pour des colonnes de distillation

Info

Publication number
EP2785428A1
EP2785428A1 EP12799106.5A EP12799106A EP2785428A1 EP 2785428 A1 EP2785428 A1 EP 2785428A1 EP 12799106 A EP12799106 A EP 12799106A EP 2785428 A1 EP2785428 A1 EP 2785428A1
Authority
EP
European Patent Office
Prior art keywords
pipe
ring
liquid
pipeline
column
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP12799106.5A
Other languages
German (de)
English (en)
Inventor
Heinz-Josef Kneuper
Torsten NICKEL
Luc TIREZ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BASF SE
Original Assignee
BASF SE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BASF SE filed Critical BASF SE
Priority to EP12799106.5A priority Critical patent/EP2785428A1/fr
Publication of EP2785428A1 publication Critical patent/EP2785428A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
    • B01D5/0078—Condensation of vapours; Recovering volatile solvents by condensation characterised by auxiliary systems or arrangements
    • B01D5/009—Collecting, removing and/or treatment of the condensate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D8/00—Cold traps; Cold baffles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16T—STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROM ENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS
    • F16T1/00—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28B—STEAM OR VAPOUR CONDENSERS
    • F28B9/00—Auxiliary systems, arrangements, or devices
    • F28B9/08—Auxiliary systems, arrangements, or devices for collecting and removing condensate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/18—Absorbing units; Liquid distributors therefor

Definitions

  • the invention relates to a pipeline for the transport of a condensable gas or a gas containing condensable components, wherein the pipeline has at least one section inclined with respect to the horizontal.
  • the invention further relates to an apparatus for carrying out mass transfer processes, comprising a column and a pipe for transporting a condensable gas or a gas containing condensable components and a use of the device.
  • Pipelines for transporting a condensable gas or a gas containing condensable components are used, for example, as vapor lines on a column.
  • the pipes are connected to the top of the column, so that the vapor from the column can flow into the pipeline.
  • the pipelines are formed as downcomers, which comprise a vertically extending section, usually parallel to the column.
  • the pipelines are usually insulated, they are not heated, so that gas or condensable components of the gas can condense on the walls of the pipeline. These form on the wall of the pipeline rivulets and usually run up to a pipe bend, where the flow is deflected from.
  • liquid collects in the pipe bend. This liquid then mixes again with the gas transported through the pipeline.
  • liquid in the form of aerosol droplets is entrained, on the other hand, some of the liquid is also vaporized due to the hot gas transported through the tube.
  • the deposition of the liquid is usually carried out in liquid separators, in which the pipeline opens.
  • Corresponding pipelines are also used, for example, in the production of nitric acid as a downpipe on an absorption column.
  • acid condenses in the pipeline.
  • this is undesirable because the condensing acid promotes corrosion on the pipe downstream equipment, such as heat exchangers.
  • the object of the present invention is to provide a pipeline and a device for carrying out mass transfer processes which permit the transport of gases containing condensable gases or condensable components, in which an accumulation of liquid in pipe bends and optionally a mixing of the liquid with the gas avoided in pipe bends.
  • a pipe for transporting a condensable gas or a gas containing condensable components which has at least one inclined portion relative to the horizontal, wherein in the inclined portion relative to the horizontal, a ring is received, with a first end face over the entire circumference liquid-tightly connected to the tube and the diameter of which decreases towards a second end face opposite the first end side, so that a space is formed between the ring and the tube, the ring is positioned in the tube such that liquid condensing out of the tube wall enters the space flows between the ring and tube, and through the wall of the tube a drain through which the liquid can drain, opens into the room.
  • the auskondensierende on the pipe wall liquid is collected in the space between the ring and pipe, so that they can not continue to flow in pipe bends.
  • the amount of liquid collecting in bends is minimized in this way. This also reduces the re-mixing of gas and liquid in the area of pipe bends.
  • the space is provided with a drain through which the liquid collected in the room can drain.
  • the ring is received inclined to the horizontal in the pipe.
  • the liquid collected in this room runs off to the lowest point.
  • the drain from the space between ring and pipe is therefore preferably located at the lowest point of the room.
  • Complete withdrawal in this context means that essentially all of the liquid can be withdrawn, but it can not be ruled out that liquid will adhere to the pipe wall or ring and will not come to drain. These are generally single drops or a thin film.
  • the inclination with which the ring is received in the pipeline is preferably in the range of 5 to 20% gradient, more preferably in the range of 7 to 13% gradient and in particular in the range of 9 to 12% gradient.
  • a slope of 100% means 1 m downhill to a horizontal distance of 1 m.
  • the ring In order to obtain a decreasing diameter of the ring from the first end side to the second end face opposite the first end face, it is possible, for example, for the ring to have a conical shape from the first end side to the second end side. As a result, the space formed between the pipe wall and the ring has a substantially triangular cross-section, the space at the top having no boundary.
  • the ring can also be designed, for example, parabolic, elliptical, hyperbolic or in the form of a circular section. It is essential that the diameter decreases from the first end side to the second end side and that as far as possible there are no corners or edges in the ring on which liquid can accumulate.
  • a sealing element with which the space formed between the ring and the pipe wall is sealed.
  • sealing material in the thread when the ring is screwed into the pipe wall.
  • a fibrous sealing material for example hemp fibers, as they are known from the installation of pipelines.
  • any other sealing material is conceivable. It is only essential here that the sealing material is inert to the condensable gas or the components of the gas and is not damaged by the gas or individual components contained in the gas.
  • particularly preferred is a cohesive connection of the ring with the tube, so that at the same time a seal is achieved by the connection.
  • the portion of the pipeline inclined from the horizontal is substantially vertical.
  • substantially vertical means that the angle of the pipe to the horizontal is in the range of 85 to 95 degrees, preferably in the range of 89 to 91 degrees.
  • one or more rings may be provided. If multiple rings are provided, they will be evenly distributed over the length of the pipe. Regardless of whether one or more rings are provided, it is preferred that a ring is located at the end of the pipe section inclined with respect to the horizontal. In this case, the end of the section of the pipeline section through which flow has last flowed in is referred to as the end. In particular, if a pipe bend follows, it is advantageous to arrange the ring immediately before the pipe bend.
  • the tube is a downcomer for vapor withdrawal from a column.
  • vapors are understood to be condensable gaseous components which are withdrawn at the top of a column.
  • the tube can open both from the top of the lid of the column and open in the head area as a side draw in the column.
  • the pipeline according to the invention is particularly preferably used for the transport of broths.
  • the pipe preferably opens in a condenser, in which the gaseous vapor is condensed. If the vapor contains not condensable components in addition to condensable constituents, even in the conditions prevailing in the condenser, only the condensable components in the condenser are condensed out. Subsequently, the gas / liquid mixture, which is formed by the condensation of the condensable constituents, fed to a liquid separator. In the liquid separator then the gaseous are separated from the liquid components.
  • the vapor contains constituents which have a corrosive effect
  • the long contact time of the condensed liquid with the surface of the tube causes corrosion, which can lead to damage to the pipeline and possibly failure of the pipeline.
  • the vapor passed through the pipeline is supplied to a liquid separator after the condensable constituents have condensed out, it is particularly preferred if the outlet from the space between the ring and the pipeline also opens into the liquid separator.
  • the pipeline through which the condensable gas or gas containing the condensable components is fed to the liquid separator preferably opens in the gas space of the liquid separator.
  • the liquid separator it is possible for the liquid separator to simultaneously act as a condenser and to have a temperature in which condensable parts condense out of the gas.
  • the drain from the space between the ring and the tube opens as a dip tube in the liquid in the liquid separator.
  • the outlet, which opens in the liquid separator the liquid which has already condensed out in the pipeline is fed to the liquid deposited in the liquid separator. This restricts fluid losses.
  • the arrangement of the sequence such that it opens as a dip tube in the liquid in the liquid separator has the advantage that a gas-tight drain from the space between the ring and tube is achieved. In particular, with a small amount of liquid which is withdrawn through the drain from the space between the ring and tube, this avoids that gas flows from the liquid separator through the pipe forming the drain back into the pipe.
  • the pipeline is part of a device for carrying out mass transfer processes.
  • Such an apparatus for carrying out mass transfer processes generally comprises a column and the pipeline as a downpipe.
  • the pipeline opens at the top of the column, so that a gaseous overhead product from the column can be removed through the pipeline.
  • the column is a conventional mass transfer column, for example an absorption column or a gas scrubber. Furthermore, it is also possible that the column is a distillation column.
  • Such a mass transfer column used for the mass transfer process usually has internals, for example in the form of an ordered packing, an unstructured packing, for example in the form of random packings, or trays.
  • a mass transfer column is operated in two phases. At the top of a gaseous product is removed and at the bottom of the column, a liquid product.
  • the apparatus for carrying out mass transfer processes which comprises the pipeline according to the invention, is suitable for use in a process for the production of nitric acid.
  • nitric acid ammonia is first oxidized with oxygen to nitric oxide and water.
  • the nitric oxide further oxidizes with oxygen to nitrogen dioxide.
  • the nitrogen dioxide is fed as a component to an absorption column. In this case, the supply of nitrogen dioxide usually takes place in the region of the bottom of the column. At the top of the column, water is given up. The nitrogen dioxide and the water run in countercurrent through the column, with an intensive mixing of nitrogen dioxide and water is achieved by suitable internals. Due to the intensive mixing nitrogen dioxide is absorbed in the water and forms nitric acid and nitrogen monoxide. The nitric acid is taken from the bottom of the column.
  • a gaseous nitric oxide and gaseous nitric acid-containing mixture is obtained. This is removed via the pipeline according to the invention at the top of the column.
  • nitrogen dioxide reacts with water contained in the gas stream to form nitric acid, which condenses out on the pipe walls.
  • the condensation of the nitric acid in the pipeline is undesirable because the nitric acid is highly corrosive.
  • addition of nitric acid, for example, in pipe bends leads to corrosion of the pipeline.
  • the material from which the ring and tubing are made depends on the gas being carried in the tubing, condensable gas or condensable components containing gas. The material is preferably selected so that it is not damaged by the gas or individual components of the gas. If the pipeline according to the invention is used in a process for the production of nitric acid, the material used is in particular a steel. Particularly suitable as material is steel with the material number 1 .4541.
  • the drain from the space between the ring and the pipe can be made in a constant diameter or with changing diameters.
  • the drain has no slope, that is connected horizontally or with a downward slope with the pipe. This allows a gravity controlled flow of the condensed liquid from the space between the ring and pipe.
  • FIG. 1 shows a schematic representation of a mass transfer column with a pipeline designed according to the invention
  • Figure 2 is a sectional view of a pipe section with received therein ring. 1 shows a mass transfer column with a pipe designed according to the invention is shown schematically.
  • a mass transfer column 1 comprises, for example, a feed 3 of a first educt.
  • the first educt can be supplied, for example, as shown in Figure 1 in the lower part of the column, for example, at the bottom of the column.
  • the mass transfer column 1 is an absorption column or a gas scrubber
  • the first product supplied via the feed 3 is gaseous.
  • the first starting material can be introduced via the feed 3 through any gas distributor in the mass transfer column 1.
  • a second feed 5 at the top of the column a second reactant is fed.
  • the second starting material is liquid in a mass transfer column 1 designed as an absorption column or gas scrubber.
  • the gaseous first educt and the liquid second educt are passed in the mass transfer column 1 in countercurrent.
  • the mass transfer column 1 is a gas scrubber
  • components of the gaseous first educt are taken up by the liquid second educt. This can also be a chemical reaction, but it is also possible that the components absorbed by the liquid dissolve only in the liquid.
  • internals 7 are contained in the mass transfer column 1.
  • the internals may be formed, for example, in the form of a structured packing, a disordered packing, for example in the form of packing, or as trays. If the internals are 7 floors, so they usually have a feed slot and a drainage shaft for the liquid and gas passage openings through which the gas can flow, on.
  • the trays are in this case generally designed as cross flow trays, wherein the liquid flows from the inlet to the drain on the floor and the gas is passed through the gas through the openings through the liquid.
  • the gas passage openings can be designed in the form of sieve holes, valves, bells or tunnels.
  • the tempering unit 9 can be embodied, for example, in the form of a double jacket enclosing the column. In this case, the double jacket is flowed through by a suitable temperature control medium. Alternatively, it is also possible, for example, to provide a corresponding tempering unit, for example in the form of heated or filled tubes or the like, inside the mass transfer column 1. If 7 floors are provided as internals, it is for example possible to arrange flowed through by a temperature control tubes on the floors. To remove the liquid from the column, there is a liquid outlet 1 1 at the bottom of the column.
  • gaseous components are withdrawn via a pipeline 13.
  • the pipe 13 can, as shown in Figure 1, be attached to the lid of the column. Alternatively, it is also possible to attach the pipe 13 laterally at the top of the mass transfer column.
  • the pipeline 13 is designed as a downpipe, that is to say that the pipeline 13 has a substantially vertically extending section 15.
  • the pipe 13 and thus also the vertically extending portion 15 is not heated or cooled, so that on the wall of the pipe 13, a part of the guided in the pipe 13 gas or parts of the constituents of the gas can condense.
  • the pipe 13 therefore has a ring 17 in the vertically extending section 15, preferably at the end of the vertically extending section 15.
  • the ring 17 is designed so that a space is formed between the pipe 13 and the ring 17, in which the condensed on the walls of liquid is collected. Via a discharge 19, the liquid is removed from the space formed between ring 17 and pipe 13.
  • the mass transfer column 1 is an absorption column which is used for producing nitric acid
  • gaseous nitrogen monoxide and nitrogen dioxide are fed via the first feed 3 as first starting material.
  • the proportion of nitrogen dioxide is more than 95% by volume.
  • the gaseous first starting material may still contain traces of nitrogen and oxygen.
  • Water is added via the second feed 5.
  • nitrogen dioxide is absorbed in the water, forming nitric acid and nitric oxide.
  • the nitric oxide reacts with oxygen to form nitrogen dioxide and further forms nitric acid with the further formation of nitric oxide.
  • 1 1 nitric acid is removed via the liquid effluent.
  • a mixture of water, nitrogen, oxygen and traces of nitrogen monoxide and nitrogen dioxide is obtained.
  • the nitrogen dioxide reacts with the water to form nitric acid.
  • the pipe section with the ring received therein to collect condensing liquid is shown in FIG.
  • the ring 17 has a first end face 21, with which the ring 17 is fixed to the wall of the pipe 13.
  • the ring 17 is secured with a weld 23 in the vertically extending portion 15 of the pipe 13. Through the connection with the weld 23, a liquid-tight connection is achieved.
  • the ring 17 is designed conical. Due to the conical design of the ring 17, a space 27 between the ring 17 and the wall of the pipe 13 is formed.
  • the ring 17 can also have any other design in which the diameter of the first end face 21 is greater than the diameter of the second end face 25, wherein the diameter of the first end face 21 is always to be chosen such that a liquid-tight connection with the pipeline can be generated.
  • the ring 17 can also be screwed or glued to the pipe 13 or fastened in another way in the pipe 13.
  • a non-positive connection for example when screwing but an additional seal is necessary so that no liquid can drain from the space 27 along the inner wall of the pipe 13.
  • an adhesive bond use an adhesive that is not damaged by substances that are carried in the pipeline. Even with a seal, a sealing material is to be provided, which is inert to the guided in the pipeline components.
  • the ring 17, as shown in Figure 2 an inclination relative to the horizontal.
  • the inclination preferably has a slope in the range of 5 to 20%, in particular in the range of 7 to 15%, particularly preferably in the range of 9 to 12%.
  • the guided in the pipe 13 gas is passed into a liquid separator.
  • auskonden- sierbare components are condensed out of the gas and collected.
  • the liquid which has already condensed out in the pipeline and which is withdrawn via the outlet 19 is particularly preferably also introduced into the liquid separator. So that no gas can flow out of the liquid separator into the pipeline through the outlet 19, it is further preferred if the outlet 19 in the form of a dip tube opens into the liquid in the liquid separator. By immersing the dip tube in the liquid, a gas-tight seal is achieved, so that no gas can get out of the liquid in the flow 19.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

L'invention concerne une conduite (13) pour le transport d'un gaz condensé ou d'un gaz contenant des composants condensables, présentant au moins une partie (15) inclinée par rapport à l'horizontale. Dans la partie (15) inclinée par rapport à l'horizontale se trouve une bague (17) qui est reliée à la conduite (13) de manière étanche au liquide sur tout le pourtour par un premier côté frontal (21) et dont le diamètre diminue en direction d'un deuxième côté frontal (25) opposé au premier côté frontal (21) de sorte qu'un espace (27) est formé entre la bague (17) et la paroi intérieure de la conduite (13), la bague (17) est positionnée dans la conduite (13) de telle manière que du liquide se condensant sur la paroi de conduite s'écoule dans l'espace (27) entre la bague (17) et la paroi intérieure de la conduite (13) et un orifice de sortie (19) par lequel le liquide peut s'écouler débouche à travers la paroi de la conduite (13) dans l'espace (27). L'invention concerne également un dispositif pour mettre en oeuvre des processus d'échange de matière et une utilisation du dispositif.
EP12799106.5A 2011-12-02 2012-11-27 Conduite de recueillement de condensat pour des colonnes de distillation Withdrawn EP2785428A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12799106.5A EP2785428A1 (fr) 2011-12-02 2012-11-27 Conduite de recueillement de condensat pour des colonnes de distillation

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201161566013P 2011-12-02 2011-12-02
EP11191665 2011-12-02
EP12799106.5A EP2785428A1 (fr) 2011-12-02 2012-11-27 Conduite de recueillement de condensat pour des colonnes de distillation
PCT/EP2012/073707 WO2013079474A1 (fr) 2011-12-02 2012-11-27 Conduite de recueillement de condensat pour des colonnes de distillation

Publications (1)

Publication Number Publication Date
EP2785428A1 true EP2785428A1 (fr) 2014-10-08

Family

ID=48534692

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12799106.5A Withdrawn EP2785428A1 (fr) 2011-12-02 2012-11-27 Conduite de recueillement de condensat pour des colonnes de distillation

Country Status (6)

Country Link
US (1) US20140346031A1 (fr)
EP (1) EP2785428A1 (fr)
KR (1) KR20140105513A (fr)
CN (1) CN104039411A (fr)
CA (1) CA2857615A1 (fr)
WO (1) WO2013079474A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101882048B1 (ko) * 2014-09-03 2018-07-25 현대중공업 주식회사 유증기 결로 방지 기능을 구비한 엔진용 유증기 배출 장치
KR102206943B1 (ko) * 2016-06-03 2021-01-22 현대중공업 주식회사 Scr 반응기의 성능 및 내구성 향상을 위한 배기계
CN110375118B (zh) * 2019-06-25 2020-11-17 惠安县崇武镇兴钗茶具商行 一种可防止溢出的浓酸输送pvc管道
GB2610637A (en) * 2021-09-14 2023-03-15 Caterpillar Energy Solutions Gmbh Condensate separator, charge gas tube assembly and gas engine
AT525979B1 (de) * 2022-09-22 2023-10-15 Avl List Gmbh Abscheideeinheit und Entfeuchtungsblock mit mehreren derartigen Abscheideeinheiten zur Entfeuchtung von Gasen

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Publication number Priority date Publication date Assignee Title
DE9003692U1 (fr) * 1990-03-30 1990-06-28 Degussa Ag, 6000 Frankfurt, De
US5820641A (en) * 1996-02-09 1998-10-13 Mks Instruments, Inc. Fluid cooled trap
DE19920741B4 (de) * 1999-05-05 2007-07-12 Qvf Engineering Gmbh Verfahren zur Herstellung konzentrierter Salpetersäure
WO2001089989A1 (fr) * 2000-05-22 2001-11-29 Qvf Engineering Gmbh Procede pour la production d"acide nitrique concentre, ainsi qu"installation pour l"execution de ce procede
DE20119359U1 (de) * 2001-11-29 2002-02-21 Bogade Klaus Kondensat-Sammeleinrichtung für Abgasrohre
CN201023022Y (zh) * 2007-04-23 2008-02-20 谢建中 氮氧化物吸收制稀硝酸装置
FR2928909B1 (fr) * 2008-03-20 2010-07-30 Arkema France Procede ameliore de fabrication d'acide nitrique

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Title
See references of WO2013079474A1 *

Also Published As

Publication number Publication date
US20140346031A1 (en) 2014-11-27
CN104039411A (zh) 2014-09-10
CA2857615A1 (fr) 2013-06-06
WO2013079474A1 (fr) 2013-06-06
KR20140105513A (ko) 2014-09-01

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