Multi-stage isolation of high pressure polyethylene

Multi-stage isolation of high pressure polyethylene

A process for the manufacture of ethylene polymers by homopolymerization and copolymerization of ethylene at pressures of from 500 to 5,000 bars and at from 50 DEG to 450 DEG C, with subsequent isolation of the polymers in high pressure product isolation zones and low pressure product isolation zone...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: MIETZNER, FRANZ GEORG, SCHLICHTHAERLE, GOTTFRIED, STEIGERWALD, KLAUS, BUECHNER, OSKAR, URBAN, FRIEDRICH
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:A process for the manufacture of ethylene polymers by homopolymerization and copolymerization of ethylene at pressures of from 500 to 5,000 bars and at from 50 DEG to 450 DEG C, with subsequent isolation of the polymers in high pressure product isolation zones and low pressure product isolation zones. The various parallel product isolation zones are at different temperatures, and the mean product residence times in the zones may be identical or different. Very different products, in amounts which can be chosen according to requirements, and with mutually independent polymer properties, can be obtained using only one high pressure polymerization system.