Method of olefin polymerization using alkane-soluble non-metallocene precatalyst

A method of polymerizing an olefin monomer to make a first bimodal polyolefin composition comprising a first higher molecular weight (HMW) polyolefin component and a first lower molecular weight (LMW) polyolefin component, the method comprising steps (1) to (5):

• (1) contacting a solution of a first alkane-soluble non-metallocene precatalyst dissolved in an alkane solvent with an activator so as to make a first trim catalyst comprising a first alkane-soluble non-metallocene catalyst;
• (2) contacting a first metallocene precatalyst and an additional amount of the first alkane-soluble non-metallocene precatalyst with an activator and, optionally, a support material so as to make a first bimodal catalyst system comprising a first metallocene catalyst and an additional amount of the first alkane-soluble non-metallocene catalyst, optionally free of the support material or disposed on and/or in the support material;
• (3) contacting the first bimodal catalyst system with the first trim catalyst to make a first mixed catalyst system comprising a mixture of the first bimodal catalyst system and the first trim catalyst;
• (4) feeding the first mixed catalyst system into a polymerization reactor;
• and (5) polymerizing the olefin monomer with the first mixed catalyst system in the polymerization reactor;
• thereby making the first HMW polyolefin component and the first LMW polyolefin component of the first bimodal polyolefin composition;
• wherein the first ASNM Precatalyst is characterized by solubility in hexanes containing at least 60 weight percent n-hexane of at least 0.10 weight percent based on total weight of the first ASNM Precatalyst and hexanes, as measured using Solubility Test Method.