Process and apparatus for the manufacture of nitride powders of the elements aluminum, boron, silicon or zirconium

• US 3,352,637 A
• Filed: 06/01/1964
• Issued: 11/14/1967
• Est. Priority Date: 05/30/1963
• Status: Expired due to Term

• Current Assignee: Gero Heymer, Heinz Harnisch
• Original Assignee: Gero Heymer, Heinz Harnisch
• Inventors: GERO HEYMER, HEINZ HARNISCH
• Application Number:
  US04/371,356
• Time in Patent Office: 1,261 Days
• US Class Current: 423/290
• CPC Class Codes: C01B 21/06 Binary 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 boronazides C01B21/08
• CPC Class Codes: C01B 21/064 with boron
• CPC Class Codes: C01B 21/0643 Preparation from boron halides
• CPC Class Codes: C01B 21/068 with silicon
• CPC Class Codes: C01B 21/072 with aluminium
• CPC Class Codes: C01B 21/076 with titanium or zirconium or hafnium

Claims

1. IN A PROCESS FOR THE MANUFACTURE OF A NITRILE OF AT LEAST ONE ELEMENT SELECTED FROM THE GROUP CONSISTING OF ALUMINUM, BORON, SILICON, AND ZIRCONIUM BY REACTING A GASEOUS CHLORIDE OF THE SAID ELEMENT AND GASEOUS AMMONIA IN CONTACT WITH A FURTHER GAS AT HIGH TEMPERATURE, THE IMPROVEMENT WHICH COMPRISES HEATING A GAS SERVING AS A HEAT TRANSFER AGENT IN AN ELECTRIC ARE AT A TEMPERATURE OF AT LEAST 2500*C., RAPIDLY MIXING SAID HEATED GAS WITH THE AFORESAID CHLORIDE AND AMMONIA IN A MIXING ZONE WHOSE WALLS ARE MAINTAINED AT A TEMPERATURE OF AT MOST 500*C. SO AS TO AVOID CORROSION OF THE WALLS OF THE REACTION CHAMBER, THE RESULTING MIXTURE HAVING A MINIMUM TEMPERATURE OF ABOUT 1500*C., COOLING THE RESULTING REACTION PRODUCTS, COLLECTING SAID REACTION PRODUCTS, AND ISOLATING THE NITRIDE THEREFROM IN LOOSE POWDERED FORM.