High pressure polymerisation process for the preparation of polyethylene
AssigneeSaudi Basic Industries Corporation
InventorsPeter Neuteboom, Jan Nicolaas Eddy Duchateau, Diego Mauricio Castaneda Zuniga
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Abstract
The invention relates to a high pressure polymerisation process for the preparation of the polyethylene wherein the polymerisation process takes place in the presence of a cobalt containing complex. The cobalt containing complex may be a complex according to Formula (I): Formula (I) wherein y1, y2, y3 and y4 may, independently of one another be the same or different, H, (C1C20) alkyl, (C5-C20) cycloalkyl, (C6-C10) aryl radical, phenyl or hydroxy-phenyl.
Claims5
A high pressure polymerisation process for the preparation of polyethylene by free radical polymerisation in supercritical ethylene in a high pressure reactor comprising a reactor inlet and a reaction zone, the process comprising:
- polymerising the ethylene at a temperature in the reaction zone of the high pressure reactor between 150° C. and 330° C. and at a reactor inlet pressure between 150 MPa and 400 MPa in the presence of a cobalt containing complex according to Formula (I):
- wherein
- y1, y2, y3 and y4, independently of one another, are the same or different, and are selected from H, (C1-C20) alkyl, (C5-C20) cycloalkyl, (C6-C10) aryl radical, phenyl, or hydroxy-phenyl.
Dependencies are inferred from the claim text.