DE974974C - Process for the production of finely divided oxides - Google Patents

Process for the production of finely divided oxides

Info

Publication number
DE974974C
DE974974C DED15521A DED0015521A DE974974C DE 974974 C DE974974 C DE 974974C DE D15521 A DED15521 A DE D15521A DE D0015521 A DED0015521 A DE D0015521A DE 974974 C DE974974 C DE 974974C
Authority
DE
Germany
Prior art keywords
production
finely divided
divided oxides
oxides
gases
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.)
Expired
Application number
DED15521A
Other languages
German (de)
Inventor
Jean Diether
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.)
Evonik Operations GmbH
Original Assignee
Degussa GmbH
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 Degussa GmbH filed Critical Degussa GmbH
Priority to DED15521A priority Critical patent/DE974974C/en
Application granted granted Critical
Publication of DE974974C publication Critical patent/DE974974C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
    • C01B13/14—Methods for preparing oxides or hydroxides in general
    • C01B13/20—Methods for preparing oxides or hydroxides in general by oxidation of elements in the gaseous state; by oxidation or hydrolysis of compounds in the gaseous state
    • C01B13/22—Methods for preparing oxides or hydroxides in general by oxidation of elements in the gaseous state; by oxidation or hydrolysis of compounds in the gaseous state of halides or oxyhalides

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Silicon Compounds (AREA)

Description

Verfahren zur Herstellung von feinverteilten Oxyden Im Hauptpatent 97q.793 ist ein Verfahren zur Herstellung von feinverteilten Oxyden durch Hydrolyse von flüchtigen Metall- oder Metalloidverbindungen, z..B. Siliziumtetrachlorid, in einer Flamme beschrieben. Das Verfahren besteht darin, daß die flüchtigen Verbindungen zusammen mit unter Wasserbildung verbrennenden Gasen, z. B. Wasserstoff oder Methan, und mit Sauerstoff oder Sauerstoff enthaltenden Gasen homogen gemischt und gemeinsam in einer Flamme zur Umsetzung gebracht werden. Die verbrennenden Gase und der Sauerstoff sollen hierbei in solchen Mengen anwesend sein, daß das gebildete Wasser zur Hydrolyse der flüchtigen Metall- oder Metalloidverbindungen mindestens ausreicht. Um das Ansetzen der entstandenen Oxyde an der Brenneröffnung zu verhindern, soll nach dem Hauptpatent am Brennermund vorbei ein Spülgas, wie Luft, geleitet werden. Durch diese Maßnahme kann bei der Herstellung von Siliziumdioxyd aus Siliziumtetrachlorid ein Anwachsen des gebildeten Oxyds an der Brenneröffnung verhindert werden.Process for the production of finely divided oxides In the main patent 97q.793 is a process for the production of finely divided oxides by hydrolysis of volatile metal or metalloid compounds, e.g. Silicon tetrachloride, in described by a flame. The process consists in removing the volatile compounds together with gases which burn with water formation, e.g. B. hydrogen or methane, and mixed homogeneously and together with oxygen or oxygen-containing gases be brought to implementation in a flame. The burning gases and the oxygen should be present in such amounts that the water formed for hydrolysis of volatile metal or metalloid compounds is at least sufficient. About the attachment To prevent the oxides formed at the burner opening, according to the main patent a purge gas, such as air, is passed past the burner mouth. By this measure can increase in the production of silicon dioxide from silicon tetrachloride of the oxide formed at the burner opening can be prevented.

Bei der Herstellung von Oxyden aus solchen flüchtigen Verbindungen, die sich schneller zersetzen als Siliziumtetrachlorid, wurde festgestellt, daß die Anwendung von Luft als Spülgas in vielen Fällen nicht genügt, um einen Ansatz der Oxyde am Brennermund zu unterbinden. Überraschenderweise wurde aber festgestellt, daß dieser Nachteil vermieden werden kann, wenn man als Spülgas Wasserstoff verwendet. Läßt man während der Umsetzung aus einzelnen Düsen, die um den Brenner herum angeordnet sind, oder aus einer Ringdüse, die um die Brenneröffnung herum liegt, Wasserstoff zutreten, so zeigt es sich, daß ein Bartansatz nicht stattfindet.In the manufacture of oxides from such volatile compounds, which decompose faster than silicon tetrachloride, it was found that the Use of air as a purge gas in many Cases is not enough to to prevent the oxides from starting at the burner mouth. Surprisingly it was but found that this disadvantage can be avoided when using the purge gas Used hydrogen. If you let out during the implementation of individual nozzles around arranged around the burner, or from a ring nozzle that surrounds the burner opening lying around, hydrogen entering, it turns out that a beard does not take place.

Das Verfahren der Erfindung kann mit gutem Erfolg z. B. bei der Zersetzung von Aluminiumchlorid, Titanchlorid oder Zirkonchlorid angewendet werden.The method of the invention can be used with good success e.g. B. in the decomposition aluminum chloride, titanium chloride or zirconium chloride can be used.

Es ist bekannt; flüchtige Metallchloride durch Sauerstoff enthaltende Gase bei hohen Temperaturen zu zersetzen, wobei außer den Reaktionskomponenten noch ein gegenüber dem Metallchlorid inertes Gas, z. B. Wasserstoff, gesondert zugeführt werden kann. Demgegenüber handelt es sich bei dem Verfahren der Erfindung nicht um eine Oxydation, sondern um eine Hydrolyse, bei welcher in.bestimmten Fällen der Wasserstoff für einen besonderen Zweck an einer bestimmten Stelle der Apparatur zugeführt wird.It is known; volatile metal chlorides by containing oxygen Gases decompose at high temperatures, taking in addition to the reaction components still a gas inert to the metal chloride, e.g. B. hydrogen, supplied separately can be. In contrast, it is not the case with the method of the invention an oxidation, but a hydrolysis, in which in certain cases the Hydrogen for a special purpose at a specific point in the apparatus is fed.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von feinverteilten Oxyden durch Hydrolyse von flüchtigen Metall-oder Metalloidverbindungen durch Zersetzung im homogenen Gemisch mit unter Wasserbildung verbrennbaren Gasen in einer Flamme unter gleichzeitiger Anwendung von Spülgasen, die während der Reaktion am Brennermund vorbeiströmen, nach Patent 974 793, dadurch gekennzeichnet, daß bei der Zersetzung flüchtiger Verbindungen, die leichter zersetzlich sind als Siliziumtetrachlorid, Wasserstoff als Spülgas verwendet wird. In Betracht gezogene Druckschriften: Schweizerische Patten!tschriften Nz. 265 192, 276037. PATENT CLAIM: Process for the production of finely divided oxides by hydrolysis of volatile metal or metalloid compounds by decomposition in a homogeneous mixture with gases combustible to form water in a flame with simultaneous use of purging gases which flow past the burner mouth during the reaction, according to Patent 974 793, characterized that in the decomposition of volatile compounds, which are more easily decomposed than silicon tetrachloride, hydrogen is used as the purge gas. Publications considered: Swiss patents Nz. 265 192, 276037.
DED15521A 1953-07-19 1953-07-19 Process for the production of finely divided oxides Expired DE974974C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DED15521A DE974974C (en) 1953-07-19 1953-07-19 Process for the production of finely divided oxides

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED15521A DE974974C (en) 1953-07-19 1953-07-19 Process for the production of finely divided oxides

Publications (1)

Publication Number Publication Date
DE974974C true DE974974C (en) 1961-06-22

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
DED15521A Expired DE974974C (en) 1953-07-19 1953-07-19 Process for the production of finely divided oxides

Country Status (1)

Country Link
DE (1) DE974974C (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2153671A1 (en) * 1971-10-28 1973-05-17 Degussa PROCESS FOR THE PRODUCTION OF FINELY DISTRIBUTED OXIDES
FR2339569A1 (en) * 1976-01-28 1977-08-26 Cabot Corp METHOD AND APPARATUS FOR THE PRODUCTION OF OXIDES OF METALS AND OF FINALLY DIVIDED METALLOIDS
FR2480732A1 (en) * 1980-04-16 1981-10-23 Cabot Corp PROCESS AND BURNER FOR THE PRODUCTION OF FINE PARTICLES OF OXIDES OF METALS AND METALLOIDS
WO2010038538A1 (en) 2008-10-01 2010-04-08 日本アエロジル株式会社 Hydrophobic silica fine particles and electrophotographic toner composition

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH265192A (en) * 1948-02-20 1949-11-30 Schweizerhall Saeurefab Process and device for the decomposition of volatile metal chlorides.
CH276037A (en) * 1947-09-02 1951-06-15 Schweizerhall Saeurefab Process for the decomposition of volatile metal chlorides.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH276037A (en) * 1947-09-02 1951-06-15 Schweizerhall Saeurefab Process for the decomposition of volatile metal chlorides.
CH265192A (en) * 1948-02-20 1949-11-30 Schweizerhall Saeurefab Process and device for the decomposition of volatile metal chlorides.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2153671A1 (en) * 1971-10-28 1973-05-17 Degussa PROCESS FOR THE PRODUCTION OF FINELY DISTRIBUTED OXIDES
FR2339569A1 (en) * 1976-01-28 1977-08-26 Cabot Corp METHOD AND APPARATUS FOR THE PRODUCTION OF OXIDES OF METALS AND OF FINALLY DIVIDED METALLOIDS
FR2480732A1 (en) * 1980-04-16 1981-10-23 Cabot Corp PROCESS AND BURNER FOR THE PRODUCTION OF FINE PARTICLES OF OXIDES OF METALS AND METALLOIDS
WO2010038538A1 (en) 2008-10-01 2010-04-08 日本アエロジル株式会社 Hydrophobic silica fine particles and electrophotographic toner composition

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