Abstract: The present disclosure relates to a precursor for making an activator in a catalyst system for olefin polymerization and methods of producing the precursor, the catalyst system, and the polyolefin. In at least one embodiment, an alumoxane precursor includes (i) the reaction product of at least one non-hydrolytic oxygen-containing compound and at least one hydrocarbyl aluminum; and (ii) an aliphatic hydrocarbon fluid. The reaction product can be identified by first set of signals in an 1HNMR spectrum in a region from about 4.5 ppm to about 5.1 ppm and a second set of signals in a region from about 5.1 ppm to about 6.5 ppm. The ratio of the first to the second set of signals is greater than or equal to about 2.8. The alumoxane precursor is easy to store and ship compared to MAO, which is an intermediate product in conventional methods for forming supported alumoxane.

Abstract: A method including: preparing an alumoxane precursor from an organic oxygen source, a hydrocarbyl aluminum, and an organic solvent; heating the alumoxane precursor to form an alumoxane suspension; removing solid methylaluminoxane from the alumoxane suspension by filtering the alumoxane suspension to form a filtered solution; and combining the filtered solution with a support to form a supported alumoxane precursor.

Abstract: A method including: contacting a support material including absorbed water with trimethylaluminum (TMA) in an aliphatic hydrocarbon; removing the aliphatic hydrocarbon by distillation at a pressure greater than or equal to 0.5 atm; heating, at a temperature ranging from about 25° C. to about 200° C., a reaction product of the support material and the TMA in a presence of TMA, wherein the TMA includes TMA in an amount of about 2-10 mmol TMA per gram of the support material in excess of an amount that reacts with the support material absorbed with water; and removing excess TMA.