AN APPARATUS AND METHOD FOR THE PRODUCTION OF POLYETHYLENE AND ETHYLENE COPOLYMERS

The invention relates to an apparatus for the high pressure polymerisation of ethylene which comprises a high pressure reactor; a conduit for the supply of ethylene to the reactor, the conduit being provided with a preheater for heating the ethylene; a waste heat boiler for the production of medium...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	VAN NULAND, TOM, REYNDERS, LEO, E
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR PREPARATION OR CHEMICAL WORKING-UP THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	The invention relates to an apparatus for the high pressure polymerisation of ethylene which comprises a high pressure reactor; a conduit for the supply of ethylene to the reactor, the conduit being provided with a preheater for heating the ethylene; a waste heat boiler for the production of medium pressure steam; a source of high pressure steam; and a steam distribution system comprising a medium pressure steam net for the distribution of medium pressure steam from the waste heat boiler, in which the preheater comprises first, second and third sections and the steam distribution system is such that the first section can be supplied with steam from the medium pressure steam net, the second section can be supplied with steam from the medium pressure steam net or with high pressure steam and the third section can be supplied with high pressure steam.