A polyolefin composition and method of producing the same

An olefin polymerization process comprising:

• contacting one or more olefinic monomers with a biphenylphenolic polymerization catalyst under polymerization conditions and in the presence of one or more treated aluminum-based scavengers in a polymerization reactor, wherein said one or more treated aluminum-based scavengers comprise the reaction product of an alkylaluminum or an aluminoxane specie with a compound of the general Formula I, wherein X is O, N, or S and R is alkyl, aryl, heteroalkyl, heteroaryl, or hydrogen, wherein n=1 if X is O or S and n=1 if X is N, and wherein at least one R is not a hydrogen;
• Rn—X—H Formula I.

A polyolefin composition comprising the polymerization reaction product of one or more olefinic monomers in the presence of at least one biphenylphenolic polymerization catalyst and one or more treated aluminum-based scavengers under polymerization conditions, wherein said one or more treated aluminum-based scavengers comprise the reaction product of an alkylaluminum specie or an aluminoxane specie with a compound of the general Formula I, wherein X is O, N, or S and R is alkyl, aryl, heteroalkyl, heteroaryl, or hydrogen, wherein n=1 if X is O or S and n=1 if X is N, and wherein at least one R is not a hydrogen;

• Rn—X—H Formula I,
• and wherein the polyolefin composition comprises less than 50% of the oligomer level of a polyolefin composition produced in an olefin polymerization process in the presence of one or more untreated aluminum-based scavengers.