Patent ID: 7790818

Claim:
A process for preparing a solid catalyst component for polymerizing at least one olefin, the process comprising: continuously feeding to a vessel containing solid particles of a MgCl 2 .mROH adduct, wherein 0.5<m<6.0 and R is an alkyl, cycloalkyl or aryl radical comprising 1-12 carbon atoms, a liquid phase comprising at least one compound capable of reacting with the —OH group(s) of said adduct to obtain a slurry comprising a MgCl 2 .nROH adduct, wherein n is lower than m; continuously withdrawing a liquid stream from the liquid phase to keep constant the level of the liquid phase in the vessel; and reacting the slurry comprising the MgCl 2 .nROH adduct with at least one titanium compound of formula Ti(OR o ) p X q−p , wherein q=3-4; p=0-q; X is a halogen; and R o is an alkyl, cycloalkyl, or aryl radical comprising 1-18 carbon atoms.