Saudi Basic Industries Corporation

Ali Saad Headan

Wei Xu

Vugar O Aliyev

Atieh Aburaqabah

Sirajudeen Mohamed

Jaiprakash Brijal Sainani

The present invention is directed to a process for the production of high density polyethylene by polymerisation of ethylene in the presence of a supported chromium oxide based catalyst which is modified with an organic compound comprising oxygen and a nitrogen atom which is selected from the group consisting of saturated heterocyclic organic compounds with a five or six membered ring, amino esters and amino alcohols. Such organic compounds allow manufacturing of HDPE with increases molecular weight distribution and increased molecular weight.

Process for polymerisation of ethylene

The invention is directed to a process for the production of high density polyethylene by polymerization of ethylene in the presence of a supported chromium oxide based catalyst and an activator characterized in that the activator comprises the reaction mixture of a boron compound and/or an alkyl aluminum compound and a nitrogen containing compound wherein the boron compound is a (C-C) alkyl boron compound or a (C-C) aromatic boron compound, wherein the alkyl aluminum compound is an organo aluminum compound having the formula AIRin which R is a hydrocarbon radical containing 1-10 carbon atom and wherein the nitrogen containing compound comprises &#x2014;NH, &#x2014;NHR, &#x2014;NR, wherein R may be an alkyl or a substituted alkyl having from 1 to 40 carbon atoms.

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Riyadh, Saudi Arabia

Ali Saad Headan