EP0983122A2 - Nozzle for dosing liquid microflux in a high-temperature environment - Google Patents

Nozzle for dosing liquid microflux in a high-temperature environment

Info

Publication number
EP0983122A2
EP0983122A2 EP98929346A EP98929346A EP0983122A2 EP 0983122 A2 EP0983122 A2 EP 0983122A2 EP 98929346 A EP98929346 A EP 98929346A EP 98929346 A EP98929346 A EP 98929346A EP 0983122 A2 EP0983122 A2 EP 0983122A2
Authority
EP
European Patent Office
Prior art keywords
nozzle
atomizing
medium
atomization
hole
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Withdrawn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
EP98929346A
Other languages
German (de)
French (fr)
Inventor
Jochen Baurmeister
Thomas Schäfer
Josef Schwab
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.)
Siemens Axiva GmbH and Co KG
Original Assignee
Aventis Research and Technologies GmbH and Co KG
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 Aventis Research and Technologies GmbH and Co KG filed Critical Aventis Research and Technologies GmbH and Co KG
Publication of EP0983122A2 publication Critical patent/EP0983122A2/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/24—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means incorporating means for heating the liquid or other fluent material, e.g. electrically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/30—Dip tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/002—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour incorporating means for heating or cooling, e.g. the material to be sprayed

Definitions

  • Nozzle for dosing the smallest liquid flows in a high temperature environment
  • the invention relates to a device for atomizing a medium, comprising a nozzle tip with a nozzle body with at least one nozzle hole and a cooling device.
  • nozzles are known for example from US 5,351, 889 and US 5,253,810.
  • a nozzle tip with a spray nozzle with at least one spray hole is also known from US Pat. No. 4,150,794.
  • the atomizer body is followed by a seal that prevents the medium from escaping while bypassing the nozzle body.
  • Nozzles with the features mentioned at the outset are also used for metering very small amounts of catalyst in the pyrolysis of acetic acid to ketene and water.
  • the catalyzed acetic acid pyrolysis is used industrially for the production of ketene, diketene and acetic anhydride, using the following process:
  • Acetic acid is evaporated and preheated to production temperature.
  • the catalyst e.g. Triethyl phosphate, dosed in liquid form in the acetic acid vapor.
  • the mixture is kept at the reaction temperature in a tubular reactor. After the reaction zone, the mixture is cooled so that water and unreacted acetic acid condense.
  • the ketene is further processed depending on the desired follow-up product.
  • a disadvantage of this process is that, owing to the small amount of catalyst that is already dosed on a large industrial scale, a
  • the object of the invention was therefore to improve the known device.
  • a device of the type mentioned which is characterized in that the or each atomizing hole has a diameter of less than or equal to 50 ⁇ m, that the cooling device has a flow-through space for a cooling medium which surrounds the nozzle tip, so that the Device up to the exit of the
  • Spray nozzle hole can be temperature-controlled, and that a seal is arranged in the direction of flow behind the spray nozzle, which prevents the medium from escaping while bypassing the spray nozzle.
  • the invention thus relates to a device for atomizing a medium, comprising a nozzle tip with a nozzle body with at least one nozzle hole and a cooling device, characterized in that the or each nozzle hole has a diameter of less than or equal to 50 ⁇ m, that the cooling device has a flow-through space for a Has cooling medium which surrounds the nozzle tip, so that the device up to the outlet of the
  • Spray nozzle hole can be temperature-controlled, and that a seal is arranged in the direction of flow behind the spray nozzle, which prevents the medium from escaping while bypassing the spray nozzle.
  • the or each atomization hole has one
  • Diameters less than or equal to 40 preferably less than or equal to 30, particularly preferably less than or equal to 20 and very particularly preferably approximately 10 ⁇ m.
  • a metal seal preferably a silver seal, is advantageously used as the seal.
  • the atomizing body is preferably made of an alloy that contains platinum and / or iridium.
  • the device has at least one seal which prevents the medium from escaping bypassing the atomizing body and which is based on the Flow direction of the medium is arranged behind the atomizing body. This prevents abrasion from the seal from clogging the atomization hole.
  • a filter is used in front of the atomizing body, which likewise prevents the atomizing hole from becoming blocked.
  • the nozzle according to the invention offers the possibility of supplying liquid flows of less than 20 ml / min, preferably from 0.05-1, or up to 10 ml / min continuously in liquid form into a gas space with temperatures up to 1000 ° C., preferably up to 1100 ° C. dose.
  • a blockage of the atomization hole for example due to frequently observed coking of the catalyst during pyrolysis of acetic acid, no longer takes place due to the inventive design of the cooling.
  • Spraying the catalyst as a liquid jet in a pilot plant has the advantage of better transferability of the results to large plants.
  • metering as a liquid jet is more effective than pre-evaporation of the catalyst and metering in gaseous form, since in the latter case the nozzle was coked almost immediately.
  • the nozzle design offers the possibility of continuously atomizing the smallest amounts of liquid as a fine jet into hot gases. Areas of application are laboratory and pilot plant equipment where additives have to be liquid.
  • a nozzle 1 is shown, with which a liquid 13 can be conveyed through the nozzle tip 3 by means of a pump (not shown) via a stainless steel tube 2, which has a cooling jacket 8, with a pressure of up to 400 bar.
  • the tip 3 contains two mounting screws 4.5, which a spray body, the
  • the nozzle plate 6 has an atomization hole 7 with a hole diameter of 10-30 ⁇ m.
  • the tube 2 and the tip 3 are surrounded by the cooling jacket 8 so that the tube 2 can be heated to the nozzle tip 3, up to the outlet of the atomization hole 7. This is achieved in that the tip 3 of a space 12th is surrounded, which can be flowed through by a cooling medium 14.
  • the first seal 9 prevents the liquid 13 from escaping from the nozzle tip 3 bypassing the nozzle plate 6 between the screws 4, 5. It is arranged after the nozzle plate 6. This prevents abrasion of the seal 9 from clogging the atomization hole 7.
  • a second seal 10 prevents leakage between the screw 4 and the wall of the tip 3.
  • a filter 11 is inserted between the second seal 10 and the screw 4 and also prevents the atomization hole 7 from becoming blocked.
  • a guide tube 15 effectively distributes the cooling medium 14 into the space 12 around the nozzle tip 3.

Abstract

The invention relates to a device for atomizing a medium, comprising a nozzle tip with an atomization body having at least one atomization orifice, in addition to a cooling device. The invention is characterized in that the atomization orifice or each atomization orifice (7) has a diameter of less than or equal to 50 νm, in that the cooling device (8, 12) has a chamber (12) that can be cross-flown by the coolant (14) and surrounds the nozzle tip (3) so that the device can be kept at a specified temperature up to the exit of the atomization orifice (7), and in that a seal (9) is arranged behind the atomization body (6) in the direction of flow, which prevents the outflow of the medium (13) by bypassing the atomization body (6).

Description

Beschreibungdescription
Düse zur Dosierung kleinster Flüssigkeitsströme in HochtemperaturumgebungNozzle for dosing the smallest liquid flows in a high temperature environment
Die Erfindung betrifft eine Vorrichtung zum Verdüsen eines Mediums, aufweisend eine Düsenspitze mit einen Verdüsungskörper mit mindestens einem Verdüsungsloch sowie eine Kühleinrichtung. Solche Vorrichtungen (Düsen) sind beispielsweise aus der US 5,351 ,889 und der US 5,253,810 bekannt.The invention relates to a device for atomizing a medium, comprising a nozzle tip with a nozzle body with at least one nozzle hole and a cooling device. Such devices (nozzles) are known for example from US 5,351, 889 and US 5,253,810.
Eine Düsenspitze mit einem Verdüsungskörper mit mindestens einem Verdüsungsloch ist auch aus der US 4,150,794 bekannt. In dieser Düsenspitze, die speziell für Schneidaufgaben konzipiert ist, ist dem Verdüsungskörper eine Dichtung nachgeordnet, die das Austreten des Mediums unter Umgehung des Düsenkörpers verhindert.A nozzle tip with a spray nozzle with at least one spray hole is also known from US Pat. No. 4,150,794. In this nozzle tip, which is specially designed for cutting tasks, the atomizer body is followed by a seal that prevents the medium from escaping while bypassing the nozzle body.
Düsen mit den eingangs genannten Merkmalen werden auch zur Dosierung sehr geringer Katalysatormengen bei der Essigsäurepyrolyse zu Keten und Wasser verwendet. Die katalysierte Essigsäurepyrolyse wird technisch für die Produktion von Keten, Diketen und Essigsäureanhydrid eingesetzt, und zwar nach folgendem Verfahren:Nozzles with the features mentioned at the outset are also used for metering very small amounts of catalyst in the pyrolysis of acetic acid to ketene and water. The catalyzed acetic acid pyrolysis is used industrially for the production of ketene, diketene and acetic anhydride, using the following process:
Essigsäure wird verdampft und auf Produktionstemperatur vorgewärmt. Mittels einer gekühlten Düse wird anschließend der Katalysator, z.B. Triethylphosphat, in flüssiger Form in den Essigsäuredampf dosiert. Die Mischung wird in einem Rohrreaktor auf Reaktionstemperatur gehalten. Nach der Reaktionsstrecke wird abgekühlt, so daß Wasser und nicht umgesetzte Essigsäure kondensieren. Die Weiterverarbeitung des Ketens erfolgt je nach gewünschtem Folgeprodukt.Acetic acid is evaporated and preheated to production temperature. The catalyst, e.g. Triethyl phosphate, dosed in liquid form in the acetic acid vapor. The mixture is kept at the reaction temperature in a tubular reactor. After the reaction zone, the mixture is cooled so that water and unreacted acetic acid condense. The ketene is further processed depending on the desired follow-up product.
Nachteilig an diesem Verfahren ist, daß aufgrund der schon im großindustriellen Produktionsmaßstab geringen Dosiermenge an Katalysator eineA disadvantage of this process is that, owing to the small amount of catalyst that is already dosed on a large industrial scale, a
Maßstabsverkleinerung der Anlagen auf Versuchsapparaturgröße (100 - 5000 g/h Essigsäure) bei gleichen Dosierbedingungen für den Katalysator mit den bekannten Düsen nicht möglich ist, ohne daß Verkokungen und/oder Verstopfungen die Funktionsfähigkeit der bekannten Düsen beeinträchtigen.Scale-down of the plants to test apparatus size (100 - 5000 g / h acetic acid) with the same dosing conditions for the catalyst with the known nozzles is not possible without coking and / or blockages Functionality of the known nozzles impair.
Der Erfindung lag daher die Aufgabe zugrunde, die bekannte Vorrichtung zu verbessern.The object of the invention was therefore to improve the known device.
Diese Aufgabe wird erfindungsgemäß durch eine Vorrichtung der eingangs genannten Art gelöst, die dadurch gekennzeichnet ist, daß das oder jedes Verdüsungsloch einen Durchmesser kleiner gleich 50 μm hat, daß die Kühleinrichtung einen durchströmbaren Raum für ein Kühlmedium aufweist, der die Düsenspitze umgibt, so daß die Vorrichtung bis hin zum Ausgang desThis object is achieved by a device of the type mentioned, which is characterized in that the or each atomizing hole has a diameter of less than or equal to 50 μm, that the cooling device has a flow-through space for a cooling medium which surrounds the nozzle tip, so that the Device up to the exit of the
Verdüsungsloches temperiert werden kann, und daß in Strömungsrichtung hinter dem Verdüsungskörper eine Dichtung angeordnet ist, die ein Austreten des Mediums unter Umgehung des Verdüsungskörpers verhindert.Spray nozzle hole can be temperature-controlled, and that a seal is arranged in the direction of flow behind the spray nozzle, which prevents the medium from escaping while bypassing the spray nozzle.
Gegenstand der Erfindung ist somit eine Vorrichtung zum Verdüsen eines Mediums, aufweisend eine Düsenspitze mit einen Verdüsungskörper mit mindestens einem Verdüsungsloch sowie eine Kühleinrichtung, dadurch gekennzeichnet, daß das oder jedes Verdüsungsloch einen Durchmesser kleiner gleich 50 μm hat, daß die Kühleinrichtung einen durchströmbaren Raum für ein Kühlmedium aufweist, der die Düsenspitze umgibt, so daß die Vorrichtung bis hin zum Ausgang desThe invention thus relates to a device for atomizing a medium, comprising a nozzle tip with a nozzle body with at least one nozzle hole and a cooling device, characterized in that the or each nozzle hole has a diameter of less than or equal to 50 μm, that the cooling device has a flow-through space for a Has cooling medium which surrounds the nozzle tip, so that the device up to the outlet of the
Verdüsungsloches temperiert werden kann, und daß in Strömungsrichtung hinter dem Verdüsungskörper eine Dichtung angeordnet ist, die ein Austreten des Mediums unter Umgehung des Verdüsungskörpers verhindert.Spray nozzle hole can be temperature-controlled, and that a seal is arranged in the direction of flow behind the spray nozzle, which prevents the medium from escaping while bypassing the spray nozzle.
In einer besonderen Ausgestaltung hat das oder jedes Verdüsungsloch einenIn a special embodiment, the or each atomization hole has one
Durchmesser kleiner gleich 40, bevorzugt kleiner gleich 30, besonders bevorzugt kleiner gleich 20 und ganz besonders bevorzugt ungefähr 10 μm. Als Dichtung wird vorteilhafterweise eine Metalldichtung eingesetzt, bevorzugt eine Silberdichtung. Der Verdüsungskörper ist bevorzugt aus einer Legierung gefertigt, die Platin und/oder Iridium enthält.Diameters less than or equal to 40, preferably less than or equal to 30, particularly preferably less than or equal to 20 and very particularly preferably approximately 10 μm. A metal seal, preferably a silver seal, is advantageously used as the seal. The atomizing body is preferably made of an alloy that contains platinum and / or iridium.
Die Vorrichtung weist mindestens eine Dichtung auf, die das Austreten des Mediums unter Umgehung des Verdüsungskörpers verhindert und die bezogen auf die Strömungsrichtung des Mediums hinter dem Verdüsungskörper angeordnet ist. Dadurch wird vermieden, daß Abrieb von der Dichtung das Verdüsungsloch verstopft. In einer besonderen Ausgestaltung ist vor dem Verdüsungskörper ein Filter eingesetzt, das ebenfalls einer Verstopfung des Verdüsungsloches vorbeugt.The device has at least one seal which prevents the medium from escaping bypassing the atomizing body and which is based on the Flow direction of the medium is arranged behind the atomizing body. This prevents abrasion from the seal from clogging the atomization hole. In a special embodiment, a filter is used in front of the atomizing body, which likewise prevents the atomizing hole from becoming blocked.
Die erfindungsgemäße Düse bietet die Möglichkeit, Flüssigkeitsströme kleiner als 20 ml/min, bevorzugt von 0,05 - 1 , bzw. bis 10 ml/min kontinuierlich in flüssiger Form in einen Gasraum mit Temperaturen bis 1000 °C, bevorzugt bis 1100 °C zu dosieren. Eine Verstopfung des Verdüsungsloches beispielsweise durch häufig beobachtete Verkokung des Katalysators bei der Essigsäurepyrolyse findet infolge der erfindungsgemäßen Gestaltung der Kühlung nicht mehr statt. Eine Verdüsung des Katalysators als Flüssigkeitsstrahl in einer Technikumsapparatur hat den Vorteil der besseren Übertragbarkeit der Ergebnisse auf Großanlagen. Außerdem zeigte sich überraschenderweise, daß die Dosierung als Flüssigkeitsstrahl effektiver ist als eine Vorverdampfung des Katalysators und Dosierung in gasförmiger Form, da in letzterem Fall eine nahezu sofortige Verkokung der Düse erfolgte. Die Düsenkonstruktion bietet neben dem Einsatz in der Essigsäurepyrolyse die Möglichkeit, geringste Mengen an Flüssigkeit als feinen Strahl kontinuierlich in heiße Gase zu verdüsen. Anwendungsbereiche sind Labor- und Technikumsapparaturen, bei denen Zusatzstoffe flüssig sein müssen.The nozzle according to the invention offers the possibility of supplying liquid flows of less than 20 ml / min, preferably from 0.05-1, or up to 10 ml / min continuously in liquid form into a gas space with temperatures up to 1000 ° C., preferably up to 1100 ° C. dose. A blockage of the atomization hole, for example due to frequently observed coking of the catalyst during pyrolysis of acetic acid, no longer takes place due to the inventive design of the cooling. Spraying the catalyst as a liquid jet in a pilot plant has the advantage of better transferability of the results to large plants. In addition, it was surprisingly found that metering as a liquid jet is more effective than pre-evaporation of the catalyst and metering in gaseous form, since in the latter case the nozzle was coked almost immediately. In addition to its use in acetic acid pyrolysis, the nozzle design offers the possibility of continuously atomizing the smallest amounts of liquid as a fine jet into hot gases. Areas of application are laboratory and pilot plant equipment where additives have to be liquid.
Im folgenden wird eine mögliche Ausgestaltung der erfindungsgemäßen Düse anhand der in der Figur gezeigten geschnittenen Seitenansicht beispielhaft beschrieben. Eine Beschränkung der Erfindung in irgendeiner Weise ist dadurch nicht beabsichtigt.A possible embodiment of the nozzle according to the invention is described below by way of example on the basis of the sectional side view shown in the figure. It is not intended to limit the invention in any way.
In der Figur ist eine Düse 1 gezeigt, mit der eine Flüssigkeit 13 mittels einer Pumpe (nicht gezeigt) über ein Edelstahlrohr 2, das einen Kühlmantel 8 aufweist, mit einem Druck bis zu 400 bar durch die Düsenspitze 3 gefördert werden kann. Die Spitze 3 enthält zwei Halterungsschrauben 4,5, welche einen Verdüsungskörper, dasIn the figure, a nozzle 1 is shown, with which a liquid 13 can be conveyed through the nozzle tip 3 by means of a pump (not shown) via a stainless steel tube 2, which has a cooling jacket 8, with a pressure of up to 400 bar. The tip 3 contains two mounting screws 4.5, which a spray body, the
Düsenplättchen 6, so fixieren, daß es gegen eine erste Dichtung 9 gepreßt wird. Das Düsenplättchen 6 hat ein Verdüsungsloch 7 mit einem Lochdurchmesser von 10 - 30 μm. Das Rohr 2 und die Spitze 3 sind von dem Kühlmantel 8 so umfaßt, daß das Rohr 2 bis zur Düsenspitze 3 temperiert werden kann, und zwar bis hin zum Ausgang des Verdüsungsloches 7. Dies wird dadurch erreicht, daß die Spitze 3 von einem Raum 12 umgeben ist, der von einem Kühlmedium 14 durchströmt werden kann.Fix the nozzle plate 6 so that it is pressed against a first seal 9. The nozzle plate 6 has an atomization hole 7 with a hole diameter of 10-30 μm. The tube 2 and the tip 3 are surrounded by the cooling jacket 8 so that the tube 2 can be heated to the nozzle tip 3, up to the outlet of the atomization hole 7. This is achieved in that the tip 3 of a space 12th is surrounded, which can be flowed through by a cooling medium 14.
Die erste Dichtung 9 verhindert, daß die Flüssigkeit 13 unter Umgehung des Düsenplättchens 6 zwischen den Schrauben 4,5 aus der Düsenspitze 3 austritt. Sie ist nach dem Düsenplättchen 6 angeordnet. Dadurch wird verhindert, daß Abrieb der Dichtung 9 das Verdüsungsloch 7 verstopft. Eine zweite Dichtung 10 verhindert den Austritt zwischen Schraube 4 und Wand der Spitze 3. Zwischen der zweiten Dichtung 10 und der Schraube 4 ist ein Filter 11 eingesetzt, das ebenfalls einer Verstopfung des Verdüsungsloches 7 vorbeugt. Ein Leitrohr 15 bewirkt eine effektive Verteilung des Kühlmediums 14 in den Raum 12 um die Düsenspitze 3. The first seal 9 prevents the liquid 13 from escaping from the nozzle tip 3 bypassing the nozzle plate 6 between the screws 4, 5. It is arranged after the nozzle plate 6. This prevents abrasion of the seal 9 from clogging the atomization hole 7. A second seal 10 prevents leakage between the screw 4 and the wall of the tip 3. A filter 11 is inserted between the second seal 10 and the screw 4 and also prevents the atomization hole 7 from becoming blocked. A guide tube 15 effectively distributes the cooling medium 14 into the space 12 around the nozzle tip 3.

Claims

Patentansprüche claims
1. Vorrichtung zum Verdüsen eines Mediums, aufweisend eine Düsenspitze mit einen Verdüsungskörper mit mindestens einem Verdüsungsloch sowie eine Kühleinrichtung, dadurch gekennzeichnet, daß das oder jedes Verdüsungsloch (7) einen Durchmesser kleiner gleich 50 μm hat, daß die Kühleinrichtung (8,12) einen durchströmbaren Raum (12) für ein Kühlmedium (14) aufweist, der die Düsenspitze (3) umgibt, so daß die Vorrichtung bis hin zum Ausgang des Verdüsungsloches (7) temperiert werden kann, und daß in Strömungsrichtung hinter dem Verdüsungskörper (6) eine Dichtung (9) angeordnet ist, die ein Austreten des Mediums (13) unter Umgehung des Verdüsungskörpers (6) verhindert.1. Device for atomizing a medium, comprising a nozzle tip with a atomizing body with at least one atomizing hole and a cooling device, characterized in that the or each atomizing hole (7) has a diameter of less than or equal to 50 μm, that the cooling device (8, 12) has one has flowable space (12) for a cooling medium (14) which surrounds the nozzle tip (3) so that the device can be tempered up to the outlet of the atomizing hole (7), and that a seal in the flow direction behind the atomizing body (6) (9) is arranged, which prevents the medium (13) from escaping while bypassing the atomizing body (6).
2. Vorrichtung nach Anspruch 1 , dadurch gekennzeichnet, daß vor dem Verdüsungskörper (6) ein Filter (11) angeordnet ist.2. Device according to claim 1, characterized in that a filter (11) is arranged in front of the atomizing body (6).
3. Verwendung einer Vorrichtung nach mindestens einem der Ansprüche 1 bis 2 zum Dosieren von Flüssigkeiten in flüssiger Form in Gasräume mit3. Use of a device according to at least one of claims 1 to 2 for dosing liquids in liquid form in gas spaces with
Temperaturen bis 1100 °C.Temperatures up to 1100 ° C.
4. Verwendung nach Anspruch 3, dadurch gekennzeichnet, daß Flüssigkeitsströme kleiner gleich 20 ml/min dosiert werden.4. Use according to claim 3, characterized in that liquid flows less than or equal to 20 ml / min are metered.
5. Verwendung nach Anspruch 4, dadurch gekennzeichnet, daß Flüssigkeitsströmevon 0,05 - 1 ml/min dosiert werden.5. Use according to claim 4, characterized in that liquid flows of 0.05-1 ml / min are metered.
6. Verfahren zur Herstellung von Keten durch Pyrolyse von Essigsäuredampf in Gegenwart eines Katalysators, dadurch gekennzeichnet, daß der Katalysator in Form eines Flüssigkeitsstrahls kontinuierlich in den Essigsäuredampf dosiert wird. 6. A process for the preparation of ketene by pyrolysis of acetic acid vapor in the presence of a catalyst, characterized in that the catalyst is continuously metered into the acetic acid vapor in the form of a jet of liquid.
EP98929346A 1997-05-28 1998-05-20 Nozzle for dosing liquid microflux in a high-temperature environment Withdrawn EP0983122A2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19722338 1997-05-28
DE19722338A DE19722338A1 (en) 1997-05-28 1997-05-28 Nozzle for dosing the smallest liquid flows in a high temperature environment
PCT/EP1998/002956 WO1998053916A2 (en) 1997-05-28 1998-05-20 Nozzle for dosing liquid microflux in a high-temperature environment

Publications (1)

Publication Number Publication Date
EP0983122A2 true EP0983122A2 (en) 2000-03-08

Family

ID=7830746

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98929346A Withdrawn EP0983122A2 (en) 1997-05-28 1998-05-20 Nozzle for dosing liquid microflux in a high-temperature environment

Country Status (6)

Country Link
EP (1) EP0983122A2 (en)
JP (1) JP2001526588A (en)
CN (1) CN1258235A (en)
CA (1) CA2291737A1 (en)
DE (1) DE19722338A1 (en)
WO (1) WO1998053916A2 (en)

Families Citing this family (3)

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Publication number Priority date Publication date Assignee Title
DE102004001451A1 (en) * 2004-01-08 2005-08-11 Boehringer Ingelheim International Gmbh Device for holding a fluidic component
EP2647760B1 (en) * 2012-04-02 2017-12-27 Valmet Technologies, Inc. Device for treating a fiber web
CN113237065B (en) * 2021-01-13 2022-12-27 重庆川维石化工程有限责任公司 Intelligent control waste sulfuric acid cracking furnace and waste sulfuric acid cracking process

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Publication number Priority date Publication date Assignee Title
JPS5413020A (en) * 1977-06-30 1979-01-31 Nippon Oxygen Co Ltd Liquid fuel burner
US4150794A (en) * 1977-07-26 1979-04-24 Camsco, Inc. Liquid jet cutting nozzle and housing
CA1324949C (en) * 1988-12-22 1993-12-07 C-I-L Inc. Injection nozzle
US5351889A (en) * 1991-10-16 1994-10-04 The United States Of America As Represented By The Secretary Of The Navy Flow tripped injector
US5253810A (en) * 1992-03-13 1993-10-19 The United States Of America As Represented By The Secretary Of The Navy High heat, high pressure, non-corrosive injector assembly
US5407136A (en) * 1992-09-18 1995-04-18 Iris Graphics, Inc. Ink-jet nozzle
US5346133A (en) * 1993-03-25 1994-09-13 The M. W. Kellogg Company High temperature liquid injection apparatus

Non-Patent Citations (1)

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Title
See references of WO9853916A2 *

Also Published As

Publication number Publication date
JP2001526588A (en) 2001-12-18
DE19722338A1 (en) 1998-12-10
CA2291737A1 (en) 1998-12-03
WO1998053916A3 (en) 1999-03-11
CN1258235A (en) 2000-06-28
WO1998053916A2 (en) 1998-12-03

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