CHLORINATION OF ZIRCONIA-SILICA COMPOUNDS

Patent · Thu May 25 04:00:00 EDT 1961

OSTI ID:4053641

Evans, A W

A process for the preparation of zirconium tetrachloride by the action of chlorine at 1050 to 1250 deg C on a zirconiumsilica compound such as zircon is described. The process is maintained in the presence of a reducing agent as a fluidized mass and is followed by a separation of zirconium tetrachloride from silicon tetrachloride. The process is characterized by the introduction of a zirconium-containing additive into the mass, the additive being introduced in an amount such that the weight of the additive in the mass is always less than the weight of the zirconia-silica compound in the mass. The additive reacts highly exothermically with chlorine so that the mass is maintained at the desired high temperature. The reducing agent is petroleum coke. The zirconium-containing additive is zirconium cyanonitride, zirconium nitride, zirconium carbide, zirconium metal, or zirconium metal dross and is added in the amount of 10 to 80%, preferably 25 to 45%, by weight of the zirconia-silica compound. The materials are in powder form with the coke being ground to between 18 and 100 mesh. A plurality of chlorine inlets are provided through the base of the fluidized bed for equal distribution and imposing upon the passage through the block a pressure of one-half to fifty times the pressure drop in passage through the bed. (N.W.R.)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-15-020653
• OSTI ID: 4053641
• Report Number(s): GB 868807
• Country of Publication: United Kingdom
• Language: English

Related Subjects

CARBON
CHEMISTRY
CHLORINATION
CHLORINE
FLUIDIZATION
FLUIDS
MASS
METALS
NITRIDES
PETROLEUM
POWDERS
PREPARATION
PRESSURE
REDUCTION
SEPARATION PROCESSES
SILICON CHLORIDES
SILICON OXIDES
TEMPERATURE
ZIRCONIUM CARBIDES
ZIRCONIUM CHLORIDES
ZIRCONIUM NITRIDES
ZIRCONIUM OXIDES