SOLID CATALYST FOR ALPHA-OLEFIN POLYMERIZATION, ITS MANUFACTURE, AND POLYMERIZATION OF ALPHA-OLEFIN IN PRESENCE OF CATALYST SYSTEM CONTAINING IT

摘要

The invention concerns: a catalytic solid containing magnesium, a halogen, titanium and silicon, this catalytic solid also containing aluminium and being microporous; a process for preparing this catalytic solid; use of this catalytic solid for polymerizing alpha-olefines.