Patent ID: 7964678
Filing Date: 2011-06-21
Classification: B01J,C08F

Abstract:
1. A catalyst system for olefin polymerization for forming a polyolefin including poly-alpha-olefin, comprising a solid catalyst component A, which comprises elements of titanium, magnesium and chlorine and internal electron donors; a cocatalyst component B, which comprises an organoaluminum compound having a chemical formula of R optionally an external electron donor component C; which is capable of adjusting the catalytic activity of the catalyst system in a range between about 40,000 and about 150,000 g PP/g Cat and adjusting the isotactic index and molecular weight distribution index of the poly-alfa-olefin; wherein the solid catalyst component A comprises a specific surface area between about 100 m where, in formulae (I), (II) and (III), wherein the organic acid ester is monobasic aromatic acid ester or dibasic aromatic acid esters; wherein the 1,3-diether is 9,9-bis(methoxymethyl)fluorene or 2,2-dialkyl-1,3-dimethoxypropane having a general formula of CH wherein the external electron donor component C comprises an organic silicon compound having a chemical formula of R