Zirconium(IV) chloride

  • Zirconium tetrachloride
  • Zirconium chloride ( ambiguous )

Smoking air white powder

Fixed

2.8 g · cm -3

331 ° C

1.3 hPa at 190 ° C

Decomposition in water

Risk

1690 mg · kg -1 ( LD50, rat, oral)

-982 KJ · mol -1

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Zirconium (IV ) chloride is a chloride of zirconium. It is a white powder which is rapidly hydrolyzed in air. It is an important compound for the manufacture of zirconium, and other zirconium compounds.

Production and representation

Zirconium (IV ) chloride can be recovered by Carbochlorieren zirconia. The zirconium oxide is converted to coke in an electric arc to Zirconiumcarbonitrid ( carbon and nitrogen -containing zirconium ) and then with chlorine to zirconium ( IV) chloride.

Also possible is the preparation by chlorination of zirconium with chlorine at 650 ° C or with lead (II ) chloride at 500 ° C.

Properties

Physical Properties

Zirconium (IV ) chloride has a polymer structure such as hafnium (IV ) chloride HfCl4. Its standard enthalpy of formation is -980.52 kJ / mol, its molar Standardentropie 181.41 JK - 1 mol -1 and its heat capacity JK - 1mol 125.38 -1.

Use

Zirconium (IV ) chloride is used:

  • For the production of zirconium compounds such as zirconyl chloride and zirconium ZrOCl2 - organic complex compounds
  • As the catalyst in Friedel- Crafts reactions and polymerization reactions of olefins and epoxides.
  • As an intermediate in the production of metal zirconium by the Kroll process
CAS registry number PubChem Sublimation (phase transition) Vapor pressure Dangerous Substances Directive (67/548/EEC) Hydrolysis Zirconium dioxide Lead(II) chloride Hafnium tetrachloride
837208
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