Continuous production of ethylene homopolymers
Abstract
Abstract PRODUCTION OF ETHYLENE HOMOPOLYMERS AT ELEVATED TEMPERATURE UNDER SUPERATMOSPHERIC PRESSURE IN A TUBE REACTOR HAVING TWO SUCCESSIVE REACTION ZONES, A MIXTURE OF ETHYLENE, POLYMERIZATION INITIATOR AND POLYMERIZATION MODIFIER BEING INTRODUCED CONTINUOUSLY AT THE BEGINNING OF EACH REACTION ZONE. AT THE BEGINNING OF THE FIRST REACTION ZONE A MIXTURE OF ETHYLENE, AN ORGANIC HYDROPEROXIDE HAVING A HALF VALUE TEMPERATURE IN THE RANGE FROM 200* TO 260*C. AND A POLYMERIZATION MODIFIER HAVING A C5 VALUE OF FROM 2.0X10**-2 TO 1.0X10**-4 IS INTRODUCED AND AT THE BEGINNING OF THE SECOND REACTION ZONE A MIXTURE OF AN ORGANIC PEROXIDE HAVING A HALF VALUE TEMPERATURE IN THE RANGE FROM 150* TO 195*C. AND A POLYMERIZATION MODIFIER HAVING A C5 VALUE OF FROM 2.0 X10**-2 TO 1.0X10**-4 IS INTRODUCED. THE HALF VALUE TEMPERATURES OF THE TWO ORGANIC PEROXIDES AT LEAST 20*C. APART. THE PRODUCTS HAVE A WIDE MOLECULAR WEIGHT DISTRIBUTION AND A PRACTICALLY DEVOID OF VERY HIGH MOLECULAR WEIGHT CONSTITUENTS.
Inventors
- 👤 Klaus Steigerwald
- 👤 Oskar Buechner
- 👤 Wolfgang Ball
- 👤 Helmut Pfannmueller
- 👤 Friedrich Urban
Bibliographic Details
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