Patent ID: 8524845

Claim:
A process for the oligomerization of ethylene comprising contacting ethylene in a reactor with a catalyst composition comprising a transition metal bisphenolate compound and a co-catalyst wherein the transition metal bisphenolate is a zirconium (IV) bisphenolate represented by formula (I): wherein R and R 2 are, independently of one another, the same or different, H, alkyl, aryl, cycloalkyl or halogen; R 1 is —CH 2 —; X is halogen, β-diketonate, —OR, or —OOCR, wherein R is H, alkyl, aryl, cycloalkyl or halogen; m=1 or 2 and n=0 or 2 wherein the oligomerization temperature ranges between 30° C. and 120° C.