Oligomerization of ethylene
AssigneeE. I. Du Pont de Nemours and Company
InventorAlison Margaret Anne Bennett
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Abstract
Ethylene is oligomerized with certain catalysts based on iron and cobalt complexes of 2,6-pyridinecarboxaldehydebis(imine) and 2,6-diacylpyridine-bis(imine) tridentate ligands.
Claims20
A process for preparing an oligomer of ethylene, comprising the step of contacting, at a temperature of about =100° C. to about +200° C., an active catalyst with ethylene, wherein the active catalyst comprises a complex of Co[II], Co[III], Fe[II], or Fe[III ]with a tridentate ligand selected from the group consisting of a 2,6-pyridinecarboxaldehydebis (imine) and a 2,6-diacylpyridinebis(imine), in which the tridentate ligand causes steric crowding about the Co[II], Co[III], Fe[II], or Fe[III].
A process for preparing an oligomer of ethylene, comprising the step of contacting, at a temperature of about −100° C. to about +200° C., a catalyst composition with ethylene, wherein the catalyst composition comprises a complex of Co[II], Co[III], Fe[II], or Fe[III ]with a tridentate ligand selected from the group consisting of a 2,6-pyridinecarboxaldehydebis(mine) and a 2,6-diacylpyridinebis(imine), in which the tridentate ligand causes steric crowding about the Co[II], Co[III], Fe[II ]or Fe[III], and a cocatalyst.
Dependencies are inferred from the claim text.