Patent ID: 6855655

Claim:
A supported catalyst composition, comprising the reaction product of: a) a catalyst precursor composition comprising a reaction product of i) a magnesium halide; ii) a solvent said solvent selected from the group consisting of alkyl esters of aliphatic and aromatic carboxylic acids, ethers, and aliphatic ketones; iii) an electron donor compound comprising a linear or branched aliphatic or aromatic alcohol having between 1 and 25 carbon atoms; and iv) a transition metal compound wherein the transition metal is a Group 3-10 or Lanthanide element; and b) a porous inert support; c) a cocatalyst composition wherein the supported catalyst composition is substantially free of electron donor compounds other than those comprising a linear or branched aliphatic or aromatic alcohol having between 1 and 25 carbon atoms and wherein the molar ratio of the electron donor compound to magnesium is less than or equal to 1.9.