Gas-phase process for preparing ethylene polymers
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United States of America Patent
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Oct 1, 2024
Grant Date -
Oct 28, 2021
app pub date -
Dec 16, 2019
filing date -
Dec 18, 2018
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Abstract
A process for preparation of an ethylene polymer in a gas-phase polymerization unit comprising a gas-phase polymerization reactor by homopolymerizing ethylene or copolymerizing ethylene and one or more C4-C12-1-alkenes in a reaction gas made from or containing propane as polymerization diluent in the presence of a pre-activated polymerization catalyst, wherein a purified propane feed stream made from or containing at least 99 mol % propane and from 0.1 to 100 ppm mol propylene is fed to the gas-phase polymerization unit.
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