DE102011088532A1 - Use of a silicon carbide-tube comprising an elongated, cup-like body including a flange or a crimping on one end and closed at the other end, for reacting chlorosilanes - Google Patents

Use of a silicon carbide-tube comprising an elongated, cup-like body including a flange or a crimping on one end and closed at the other end, for reacting chlorosilanes Download PDF

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Publication number
DE102011088532A1
DE102011088532A1 DE102011088532A DE102011088532A DE102011088532A1 DE 102011088532 A1 DE102011088532 A1 DE 102011088532A1 DE 102011088532 A DE102011088532 A DE 102011088532A DE 102011088532 A DE102011088532 A DE 102011088532A DE 102011088532 A1 DE102011088532 A1 DE 102011088532A1
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Prior art keywords
tube
xsic
flange
chlorosilanes
elongated
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Withdrawn
Application number
DE102011088532A
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German (de)
Inventor
Bernd Wehner
Christof Zipper
Guido Stochniol
Ingo Pauli
Norbert Schladerbeck
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Evonik Operations GmbH
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Evonik Degussa GmbH
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Publication date
Application filed by Evonik Degussa GmbH filed Critical Evonik Degussa GmbH
Priority to DE102011088532A priority Critical patent/DE102011088532A1/en
Priority to JP2014501505A priority patent/JP5980308B2/en
Priority to CN201280015070.3A priority patent/CN103443027B/en
Priority to US14/005,979 priority patent/US20140086815A1/en
Priority to EP12707519.0A priority patent/EP2688839B1/en
Priority to PCT/EP2012/053356 priority patent/WO2012130547A1/en
Priority to KR1020137024631A priority patent/KR20140010959A/en
Priority to TW101109700A priority patent/TWI579236B/en
Publication of DE102011088532A1 publication Critical patent/DE102011088532A1/en
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/02—Apparatus characterised by being constructed of material selected for its chemically-resistant properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/0053—Details of the reactor
    • B01J19/0073—Sealings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/24—Stationary reactors without moving elements inside
    • B01J19/2415—Tubular reactors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/24—Stationary reactors without moving elements inside
    • B01J19/2445—Stationary reactors without moving elements inside placed in parallel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/008—Details of the reactor or of the particulate material; Processes to increase or to retard the rate of reaction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/02—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds
    • B01J8/06—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds in tube reactors; the solid particles being arranged in tubes
    • B01J8/067—Heating or cooling the reactor
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/08—Compounds containing halogen
    • C01B33/107—Halogenated silanes
    • C01B33/10773—Halogenated silanes obtained by disproportionation and molecular rearrangement of halogenated silanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/02—Apparatus characterised by their chemically-resistant properties
    • B01J2219/025—Apparatus characterised by their chemically-resistant properties characterised by the construction materials of the reactor vessel proper
    • B01J2219/0263—Ceramic
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/141—Feedstock

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Silicon Compounds (AREA)
  • Sealing Material Composition (AREA)
  • Gasket Seals (AREA)

Abstract

Use of a silicon carbide-tube for reacting chlorosilanes, is claimed. The silicon carbide-tube is an elongated, cup-like body, which includes a flange or a crimping on one end and is closed at the other end.

Description

Die Erfindung betrifft die Verwendung von Siliziumcarbidrohren, die ein Flansch- oder Bördelende aufweisen und am anderen Ende verschlossen sind, in Verfahren zur Umsetzung von Chlorsilanen.The invention relates to the use of silicon carbide tubes having a flanged end and closed at the other end in processes for reacting chlorosilanes.

Die dem Fachmann bekannten unterschiedlichen Typen von keramischen Rohr, das ganz oder teilweise aus Siliziumcarbid besteht, oder in dem das Siliziumcarbid auf unterschiedliche Weise gebunden ist, werden im Rahmen der Erfindung mit „xSiC-Rohr“ abgekürzt. Das xSiC-Rohr kann als „langgestreckter becherartiger Formkörper“ ausgeführt sein. The various types of ceramic tube known to those skilled in the art, which consists wholly or partly of silicon carbide, or in which the silicon carbide is bonded in different ways, are abbreviated to "xSiC tube" in the context of the invention. The xSiC tube can be designed as an "elongated cup-like shaped body".

Die Gasdichtigkeit solcher xSiC-Rohre kann sowohl durch den Werkstoff selbst als auch durch beim Brennen entstandene Deckschichten gegeben sein.The gas-tightness of such xSiC tubes can be given both by the material itself and also by cover layers produced during firing.

Im Stand der Technik sind Siliziumcarbidrohre seit Langem bekannt. In der Prozesstechnik beispielsweise werden Rohre aus solchem Material für Wärmetauscher eingesetzt. Die Rohre enden stumpf mit flachem Rohrquerschnitt. Beim Übergang des xSiC-Rohres auf Metall oder einen anderen Werkstoff wird Dichtheit mit einem Dichtungselement aus Elastomer erreicht. Silicon carbide tubes have long been known in the art. In process engineering, for example, tubes made of such material are used for heat exchangers. The tubes end blunt with a flat tube cross-section. When the xSiC pipe is transferred to metal or another material, sealing is achieved with an elastomer sealing element.

1 zeigt schematisch ein dem Stand der Technik gemäßes xSiC-Rohr (S) mit elastomerer Dichtung (E), die zum Beispiel als O-Ring ausgeführt sein kann, in zwei unterschiedlichen Anordnungen. 1 schematically shows a prior art xSiC tube (S) with elastomeric seal (E), which may be embodied for example as an O-ring, in two different arrangements.

Weil die Temperaturbeständigkeit elastomerer Dichtungen auf einen Bereich unter etwa 250 °C begrenzt ist, werden die Vorteile des xSiC-Werkstoffes nicht in Gänze ausgenutzt.Because the temperature resistance of elastomeric seals is limited to a range below about 250 ° C, the benefits of the xSiC material are not fully exploited.

Somit bestand die Aufgabe der vorliegenden Erfindung darin, ein Dichtungskonzept mittels nicht elastomerer Dichtungen zu ermöglichen, das die Beständigkeit keramischer Reaktorrohre gegenüber aggressiven Medien bei hohen Temperaturen nutzt, insbesondere in Verfahren zur Umsetzung von Chlorsilanen. Thus, the object of the present invention was to enable a sealing concept by means of non-elastomeric seals, which uses the resistance of ceramic reactor tubes against aggressive media at high temperatures, in particular in processes for the reaction of chlorosilanes.

Diese Aufgabe ist gelöst, indem das beschriebene xSiC-Rohr einen Flansch oder eine Bördelung aufweist.This object is achieved by the described xSiC tube has a flange or a flange.

Gegenstand der Erfindung ist demnach die Verwendung eines xSiC-Rohres, das als langgestreckter, becherartiger Formkörper ausgeführt ist, in Verfahren zur Umsetzung von Chlorsilanen, wobei das xSiC-Rohr an einem Ende einen Flansch oder eine Bördelung aufweist und am anderen Ende verschlossen ist.The invention accordingly provides for the use of an xSiC pipe, which is designed as an elongated, cup-shaped molded body, in processes for the reaction of chlorosilanes, wherein the xSiC pipe has a flange or a flanging at one end and is closed at the other end.

Der verwendungsgemäße Vorteil besteht darin, dass keine elastomere Dichtung mehr eingesetzt werden muss. Anstatt dessen können vorzugsweise Flachdichtungen eingesetzt werden. The advantage according to the invention is that no elastomeric seal has to be used anymore. Instead, flat gaskets can preferably be used.

Die Erfindung wird im Folgenden näher erläutert. Die erfindungsgemäße Verwendung des xSiC-Rohres in Verfahren zur Umsetzung von Chlorsilanen zeichnet sich dadurch aus, dass das xSiC-Rohr an einem Ende einen Flansch oder eine Bördelung aufweist und am anderen Ende verschlossen ist. The invention will be explained in more detail below. The use according to the invention of the xSiC pipe in processes for the reaction of chlorosilanes is characterized in that the xSiC pipe has a flange or a flanging at one end and is closed at the other end.

Erfindungsgemäß kann das xSiC-Rohr damit bei wesentlich höheren Temperaturen verwendet werden, als keramische Rohre mit elastomeren Dichtungen gemäß Stand der Technik erlauben, beispielsweise bei Temperaturen von 550 °C und höher. Ebenfalls ist die erfindungsgemäße Verwendung bei der Umsetzung korrosiver Substanzen möglich. Vorzugsweise hält der erfindungsgemäß verwendete Formkörper einem Innenüberdruck von 0,2 bis 50 bar, bevorzugt von 0,2 bis 8 bar stand.Thus, according to the invention, the xSiC pipe can be used at much higher temperatures than those permitted by prior art elastomeric gasket, for example at temperatures of 550 ° C and higher. Likewise, the use according to the invention in the conversion of corrosive substances is possible. The shaped body used according to the invention preferably withstands an internal overpressure of 0.2 to 50 bar, preferably 0.2 to 8 bar.

Mögliche Ausführungen des xSiC-Rohres in der erfindungsgemäßen Verwendung zeigen die 2 und 3. Diese Ausführungen können erfindungsgemäß mit einer Dichtung, vorzugsweise mit einer Flachdichtung verwendet werden. Die Verwendung des mit einem Flansch- oder Bördelende versehenen Formkörpers mit einer Flachdichtung ist besonders bevorzugt. Dies ermöglicht seinen Einsatz bei Überdrücken von 0,2 bis 50 bar, besonders bevorzugt bei einem Überdruck von etwa 6 bar. Possible embodiments of the xSiC tube in the use according to the invention show the 2 and 3 , These embodiments can be used according to the invention with a seal, preferably with a flat gasket. The use of the provided with a flange or crimp end molding with a flat gasket is particularly preferred. This allows its use at pressures of 0.2 to 50 bar, more preferably at an overpressure of about 6 bar.

Die Hinweiszeichen bedeuten:

F
Flachdichtung
S, S1, S2
Formkörper an dem Flansch oder Bördelung aufweisenden Ende
The signs mean:
F
gasket
S, S1, S2
Shaped body on the flange or flanging end

Die erfindungsgemäße Verwendung solcher xSiC-Rohre ermöglicht die Umsetzung von Chlorsilanen, vorzugsweise die Hydrierung von Chlorsilanen, weiterhin bevorzugt die Hydrierung von Tetrachlorsilan mittels Wasserstoff zu Trichlorsilan und HCl bei 900 °C bis 1100 °C, in Gegenwart eines Katalysators oder ohne einen Katalysator, vorzugsweise bei Überdrücken von 0,2 bis 50 bar, besonders bevorzugt bei einem Überdruck von etwa 6 bar.The inventive use of such xSiC tubes allows the reaction of chlorosilanes, preferably the hydrogenation of chlorosilanes, further preferably the hydrogenation of tetrachlorosilane by means of hydrogen to trichlorosilane and HCl at 900 ° C to 1100 ° C, in the presence of a catalyst or without a catalyst, preferably at pressures of 0.2 to 50 bar, more preferably at an overpressure of about 6 bar.

2 zeigt ein erfindungsgemäß verwendetes xSiC-Rohr an seinem als Flansch ausgebildeten Ende. Es kann vorteilhaft sein, diese Ausführung mit einer Flachdichtung (F) zu verwenden. 2 shows an inventively used xSiC tube at its end formed as a flange. It may be advantageous to use this embodiment with a flat gasket (F).

Eine weitere erfindungsgemäße Verwendung kann darin bestehen, dass am xSiC-Rohr an seinem als Flansch ausgebildeten Ende eine Flachdichtung (F) eingesetzt wird, die aus Graphit-, Glimmer- und/oder anderen hoch temperaturbeständigen Werkstoffen besteht. Der Aufbau solcher Dichtungen ist dem Fachmann bekannt.A further use according to the invention can consist in that a flat gasket (F), which consists of graphite, mica and / or other highly temperature-resistant materials, is used on the xSiC tube at its end formed as a flange. The construction of such seals is known in the art.

3 zeigt eine Gestalt des Formkörpers, bei dem ein xSiC-Rohr (S1) in ein weiteres xSiC-Rohr (S2) eingepasst oder eingesteckt ist, wobei die Stirnflächen von S1 und S2 in einer Ebene liegen. Vorzugsweise ist somit ein xSiC-Rohr erhalten, das ein bewegliches oder unbewegliches, besonders bevorzugt ein unbewegliches Flanschende aufweist. Es kann vorteilhaft sein, diese Ausführung mit einer Flachdichtung (F) zu verwenden. 3 shows a shape of the molding in which an xSiC pipe (S1) is fitted or plugged into another xSiC pipe (S2), wherein the end faces of S1 and S2 lie in a plane. Thus, an xSiC tube is preferably obtained which has a movable or immovable, particularly preferably a stationary flange end. It may be advantageous to use this embodiment with a flat gasket (F).

Weitere Varianten der Anordnung von Bauteilen aus xSiC sind möglich, um zu einer Flansch- und/oder Bördelausführung zu kommen. Diese sind hier nicht allumfassend dargestellt.Further variants of the arrangement of components made of xSiC are possible in order to come to a flanged and / or flanged version. These are not all shown here.

Eine erfindungsgemäße Verwendung des xSiC-Rohres besteht bei der Umsetzung von Chlorsilanen in ofenbeheizten Rohrreaktoren zur Hydrierung von Chlorsilanen. Dabei muß der Reaktionsbereich nicht nur aus dem langgestreckten Formkörper selbst bestehen, sondern auch ineinander gesteckte Rohrkombinationen sind möglich, deren Rohre an einem Ende in Form eines Flansches oder Bördels ausgeführt sind.A use according to the invention of the xSiC pipe consists in the reaction of chlorosilanes in furnace-heated tubular reactors for the hydrogenation of chlorosilanes. The reaction area must not only consist of the elongated body itself, but also nested tube combinations are possible, the tubes are designed at one end in the form of a flange or flange.

Claims (4)

Verwendung eines xSiC-Rohres, das als langgestreckter, becherartiger Formkörper ausgeführt ist, in Verfahren zur Umsetzung von Chlorsilanen, wobei das xSiC-Rohr an einem Ende einen Flansch oder eine Bördelung aufweist und am anderen Ende verschlossen ist.Use of an xSiC tube, which is designed as an elongated, cup-like molded body, in processes for the reaction of chlorosilanes, wherein the xSiC tube has a flange or a flange at one end and is closed at the other end. Verwendung nach Anspruch 1, wobei das xSiC-Rohr zur Umsetzung von Chlorsilanen in ofenbeheizten Rohrreaktoren verwendet wird.Use according to claim 1, wherein the xSiC tube is used to react chlorosilanes in oven-heated tubular reactors. Verwendung nach Anspruch 1, wobei das xSiC-Rohr bei Hydrierverfahren zur Umsetzung von Chlorsilanen verwendet wird, vorzugsweise zur Hydrierung von Tetrachlorsilan zu Trichlorsilan, vorzugsweise bei einem Überdruck von 0,2 bis 50 bar und Temperaturen von 900 °C bis 1100 °C.Use according to claim 1, wherein the xSiC tube is used in hydrogenation processes for the reaction of chlorosilanes, preferably for the hydrogenation of tetrachlorosilane to trichlorosilane, preferably at an overpressure of 0.2 to 50 bar and temperatures of 900 ° C to 1100 ° C. Verwendung nach einem der vorhergehenden Ansprüche, wobei am xSiC-Rohr an seinem als Flansch ausgebildeten Ende eine Flachdichtung (F) eingesetzt wird, die aus Graphit-, Glimmer- und/oder anderen hoch temperaturbeständigen Werkstoffen besteht.Use according to one of the preceding claims, wherein a flat gasket (F) which consists of graphite, mica and / or other high-temperature-resistant materials is used on the xSiC pipe at its end formed as a flange.
DE102011088532A 2011-03-25 2011-12-14 Use of a silicon carbide-tube comprising an elongated, cup-like body including a flange or a crimping on one end and closed at the other end, for reacting chlorosilanes Withdrawn DE102011088532A1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
DE102011088532A DE102011088532A1 (en) 2011-12-14 2011-12-14 Use of a silicon carbide-tube comprising an elongated, cup-like body including a flange or a crimping on one end and closed at the other end, for reacting chlorosilanes
JP2014501505A JP5980308B2 (en) 2011-03-25 2012-02-28 Use of silicon carbide tubes with flange ends or edge bend ends
CN201280015070.3A CN103443027B (en) 2011-03-25 2012-02-28 There is the application of the carborundum tube of flange or flared ends
US14/005,979 US20140086815A1 (en) 2011-03-25 2012-02-28 Use of silicon carbide tubes with a flanged or flared end
EP12707519.0A EP2688839B1 (en) 2011-03-25 2012-02-28 Use of silicon carbide tubes with a flanged or flared end
PCT/EP2012/053356 WO2012130547A1 (en) 2011-03-25 2012-02-28 Use of silicon carbide tubes with a flanged or flared end
KR1020137024631A KR20140010959A (en) 2011-03-25 2012-02-28 Use of silicon carbide tubes with a flanged or flared end
TW101109700A TWI579236B (en) 2011-03-25 2012-03-21 Use of silicon carbide tubes with flanged or flared end

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011088532A DE102011088532A1 (en) 2011-12-14 2011-12-14 Use of a silicon carbide-tube comprising an elongated, cup-like body including a flange or a crimping on one end and closed at the other end, for reacting chlorosilanes

Publications (1)

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DE102011088532A1 true DE102011088532A1 (en) 2013-06-20

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DE102011088532A Withdrawn DE102011088532A1 (en) 2011-03-25 2011-12-14 Use of a silicon carbide-tube comprising an elongated, cup-like body including a flange or a crimping on one end and closed at the other end, for reacting chlorosilanes

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