CH86379A - Process for the production of aluminum nitride. - Google Patents

Process for the production of aluminum nitride.

Info

Publication number
CH86379A
CH86379A CH86379DA CH86379A CH 86379 A CH86379 A CH 86379A CH 86379D A CH86379D A CH 86379DA CH 86379 A CH86379 A CH 86379A
Authority
CH
Switzerland
Prior art keywords
mass
briquettes
aluminum nitride
production
gas
Prior art date
Application number
Other languages
French (fr)
Inventor
Works Armour Fertilizer
Original Assignee
Works Armour Fertilizer
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 Works Armour Fertilizer filed Critical Works Armour Fertilizer
Publication of CH86379A publication Critical patent/CH86379A/en

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J3/00Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor
    • B01J3/04Pressure vessels, e.g. autoclaves
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B21/00Nitrogen; Compounds thereof
    • C01B21/06Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron
    • C01B21/072Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron with aluminium
    • C01B21/0726Preparation by carboreductive nitridation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D11/00Arrangement of elements for electric heating in or on furnaces
    • F27D11/02Ohmic resistance heating
    • F27D11/04Ohmic resistance heating with direct passage of current through the material being heated
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00Ohmic-resistance heating
    • H05B3/60Heating arrangements wherein the heating current flows through granular powdered or fluid material, e.g. for salt-bath furnace, electrolytic heating

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Furnace Details (AREA)
  • Ceramic Products (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Discharge Heating (AREA)

Description

       

  Procédé pour la production de nitrure d'aluminium.    L'invention concerne un procédé pour la  production de nitrure d'aluminium, suivant  lequel une distribution pratiquement uniforme  d'un gaz contenant du nitrogène a lieu au       travers    d'une masse formée de briquettes,  composées de charbon en particules menues,  d'alumine et d'un agglomérant, ce mélange  de gaz et de briquettes étant chauffé à une  température     suffisante    pour     assurer    la réaction  chimique entre le gaz et les briquettes pour  produire le nitrure d'aluminium.

   De préfé  rence, la masse des briquettes et le gaz cir  culent en sens contraire dans un conduit  vertical et la chaleur nécessaire à la réaction  est engendrée par     ni)    courant électrique tra  versant     radialement    le conduit.  



  Il est montré au dessin ci-annexé, à titre  d'exemple, un four pour la réalisation de ce  procédé.  



  Ce four est chauffé électriquement; il pos  sède un conduit central vertical 10, que les  briquettes, qui peuvent être sphériques ou  ovoïdes, traversent de haut en bas de ma  nière continue et régulière, sous     l'effet    de la  pesanteur. Du     âaz    sous pression contenant    du     nitrogène    est amené par des     tuyaux    12,  12, dans la partie inférieure dudit conduit  et le traverse de bas en haut. Par le fait  de la disposition verticale du conduit, le gaz  est distribué de faon     pratiquement    uniforme  au travers de la masse. Le four représenté  comporte, en outre, une électrode verticale  eu graphite 13 descendant au milieu du con  duit dans lequel a lieu la réaction.

   La masse  des briquettes forme un cylindre creux au  tour de cette électrode. L'électrode opposée  14 est en forme d'anneau et en graphite. De  cette     manière,    la masse des briquettes en sa       course    descendante et les gaz en leur course  ascendante     passent    entre les électrodes     oû    le  tout est chauffé par le courant électrique  passant d'une électrode à l'autre.  



  Le gaz froid, avant d'atteindre la zone  dans     laquelle    à lieu la réaction, passe au  travers de la matière solide chaude qui a  traversé cette zone et entraîne sinon toute,  du moins une partie de la chaleur contenue  dans cette matière. D'autre part, les bri  quettes au-dessus de la zone chaude sont  chauffées par le gaz montant. De cette ma-           nière    les deux ingrédients froids qui entrent  dans le conduit dans des directions opposées  tendent avantageusement à restreindre et       confiner    la zone chaude.



  Process for the production of aluminum nitride. The invention relates to a process for the production of aluminum nitride, in which a substantially uniform distribution of a nitrogen-containing gas takes place through a mass formed of briquettes, composed of fine particulate carbon, alumina. and a binder, this mixture of gas and briquettes being heated to a temperature sufficient to ensure the chemical reaction between the gas and the briquettes to produce aluminum nitride.

   Preferably, the mass of the briquettes and the gas circulate in the opposite direction in a vertical pipe and the heat necessary for the reaction is generated by electric current flowing radially through the pipe.



  It is shown in the accompanying drawing, by way of example, an oven for carrying out this process.



  This oven is electrically heated; it has a vertical central duct 10, which the briquettes, which can be spherical or ovoid, pass through from top to bottom in a continuous and regular manner, under the effect of gravity. Pressurized az containing nitrogen is brought by pipes 12, 12, into the lower part of said duct and passes through it from bottom to top. By virtue of the vertical arrangement of the duct, the gas is distributed practically uniformly through the mass. The furnace shown further comprises a vertical graphite electrode 13 descending to the middle of the pipe in which the reaction takes place.

   The mass of the briquettes forms a hollow cylinder around this electrode. The opposing electrode 14 is ring shaped and made of graphite. In this way, the mass of the briquettes in its downward stroke and the gases in their upward stroke pass between the electrodes where the whole is heated by the electric current passing from one electrode to the other.



  The cold gas, before reaching the zone in which the reaction takes place, passes through the hot solid matter which has passed through this zone and entrains if not all, at least part of the heat contained in this matter. On the other hand, the bri quettes above the hot zone are heated by the rising gas. In this way the two cold ingredients which enter the conduit in opposite directions advantageously tend to restrict and confine the hot zone.


    

Claims (1)

.REVENDICATION: Procédé de production de nitrure d'alu minium, suivant lequel on soumet une masse formée de briquettes composées de charbon en particules menues, d'alumine, et d'un liant. masse dans laquelle on répartit d'une fae,-In pratiquement uniforme un gaz contenant du nitrogène, à l'action d'une chaleur suffi sante pour assurer la réaction chimique re quise. .CLAIM: Process for the production of aluminum nitride, according to which a mass formed of briquettes composed of charcoal in fine particles, alumina, and a binder is subjected. mass in which a gas containing nitrogen is distributed in a practically uniform manner, under the action of sufficient heat to ensure the required chemical reaction. SOUS-REVENDICATIONS 1 Procédé selon la revendication, caractérisé en ce que la masse des briquettes est amenée à descendre dans Lui conduit ver tical, un gaz contenant du nitrogène pas sant de bas en haut au travers de cette masse, assurant par là une distribution pratiquement uniforme du gaz au travers de celle-ci. 2 Procédé, selon la sous-revendication I. ca ractérisé en ce que le conduit vertical est traversé radialement par un courant élec trique. SUB-CLAIMS 1 Method according to claim, characterized in that the mass of the briquettes is caused to descend in its vertical conduit, a gas containing nitrogen not healthy from the bottom up through this mass, thereby ensuring a practically distribution. uniformity of the gas through it. 2 Method according to sub-claim I. It is characterized in that the vertical duct is traversed radially by an electric current.
CH86379D 1918-01-28 1919-03-11 Process for the production of aluminum nitride. CH86379A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US86379XA 1918-01-28 1918-01-28

Publications (1)

Publication Number Publication Date
CH86379A true CH86379A (en) 1920-08-16

Family

ID=21732760

Family Applications (2)

Application Number Title Priority Date Filing Date
CH86379D CH86379A (en) 1918-01-28 1919-03-11 Process for the production of aluminum nitride.
CH86474D CH86474A (en) 1918-01-28 1919-03-11 Electric oven.

Family Applications After (1)

Application Number Title Priority Date Filing Date
CH86474D CH86474A (en) 1918-01-28 1919-03-11 Electric oven.

Country Status (4)

Country Link
CH (2) CH86379A (en)
DE (2) DE342636C (en)
FR (1) FR497290A (en)
GB (2) GB122829A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1327707A (en) * 1956-07-31 1963-05-24 Pechiney Prod Chimiques Sa Aluminum nitride manufacturing process
ATE150426T1 (en) * 1991-06-19 1997-04-15 Atochem Elf Sa CONTINUOUS PROCESS FOR PRODUCING ALUMINUM NITRIDE BY CARBONITRIDING ALUMINUM

Also Published As

Publication number Publication date
GB122828A (en) 1919-12-31
DE342636C (en) 1921-10-21
DE349436C (en) 1922-03-02
FR497290A (en) 1919-12-02
CH86474A (en) 1920-09-01
GB122829A (en) 1920-04-06

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