Hafnium tetrachloride (zirconium and hafnium tetrachloride production from zircon)

Emissions generated by the activity within the product supply chain as described in ecoinvent v3.10. The product hafnium tetrachloride (Hafnium (IV) chloride – HfCl4) is an inorganic compound which serves mostly as a precursor to most hafnium organometallic compounds. It is produced through various processes such as carbochlorination of the zircon sands and then separation of zirconium / hafnium by extractive distillation. HfCl4 is also used i) as a precursor to highly active catalysts for the Ziegler-Natta polymerization of alkenes especially propylene or ii) for other applications in organic synthesis. The cut-off classification is allocatable product. The activity type is ordinary transforming activity. The reference product amount is 1.