A CATALYST SYSTEM AND A PROCESS FOR THE PRODUCTION OF POLYETHYLENE IN THE PRESENCE OF THIS CATALYST SYSTEM•,

摘要

pThe invention relates to a catalyst system comprising I. a solid reaction product obtained by reaction of: (a) a hydrocarbon solution comprising (3) an organic oxygen containing magnesium compound or a halogen containing magnesium compound and (4) an organic oxygen containing titanium compound and (b) a mixture comprising a metal compound having the formula MeRnX3-n wherein X is a halogenide, Me is a metal of Group III of Mendeleev's Periodic System of Chemical Elements, R is a hydrocarbon radical containing 1 - 10 carbon atoms and O = n = 3 and a silicon compound of formula RmSiCI4-m wherein 0 = m = 2 and R is a hydrocarbon radical containing 1 - 10 carbon atoms wherein the molar ratio of metal from (b): titanium from (a) is lower then 1 :1 and II. an organo aluminium compound having the formula AIR3 in which R is a hydrocarbon radical containing 1 - 10 carbon atoms./p[WO2009112254A1]