Nova Chemicals (International) S.a.

Craig Allan Hulet

Benjamin Milton Shaw

Yves Lacombe

James Arthur Auger

Ross Donald Moreton

Amanda Dolores Murphy

Joel Racle

Ian Woods

In the high pressure polymerization of ethylene homopolymers or copolymers, conditions in the high pressure recycle system may lead to the build-up of low molecular weight oligomers and waxes. Sequentially draining knock-out pots, located downstream of a high pressure separator, at regular intervals can reduce the build-up of low molecular weight oligomers and waxes during the high pressure polymerization of alpha olefins.

Mitigation of wax levels in the high pressure low density polyethylene process

In the high pressure of polymerization of ethylene homopolymer or copolymers conditions in the reactor may become unstable leading to the decomposition ('decomp') of the reaction mixture. Monitoring temperature excursions traveling through the reactor over close thermocouples (a roller) to detect changes in the mean temperature and the moving temperature front for a group of thermocouples detects conditions potentially leading to a decomp.

Roller detection

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Craig Allan Hulet