Patent ID: 9701770
Date: 2017-07-11
CPC Classifications: C08F

Claim:
1. Silica supported catalyst composition which is useful in olefin polymerization, said composition comprising: a SiO a transition metal (M) content comprised between 3 and 9.1 weight %; a magnesium content comprised between 0.5 and 3.3 weight %; an aluminium content comprised between 0.3 and 5 weight % and a chlorine content comprised between 5 and 30 weight %; and wherein the said silica support has, prior to addition of catalytically active ingredients, a residual surface hydroxyl content comprised between 0.6 and 2 mmole/g of silica, and the molar ratio of transition metal (M) to magnesium is comprised between 0.3 and 2.5.