Magnesium alkoxide granulates, useful for preparing polymerization catalysts of Ziegler-Natta type, have specified average particle diameter

摘要

Magnesium alkoxide granulates exhibits an average particle diameter (d 50) of 0.3-5 mm, preferably 1-3 mm. An independent claim is included for the preparation of magnesium alkoxide granulates comprising reacting magnesium with an aluminum compound (I) of formula (AlR 3-nHal n) and an alcohol in non-coordinating solvent. R : alkyl or aryl, preferably 1-8C alkyl; Hal : halogen, preferably Cl, Br or I; and n : =0 or =2.