Patent · US Active

Gas-phase process for preparing ethylene polymers

US12103988B2 · kind B2 · utility

0Cited by

7References

20Claims

0Family size

Assignee

Basell Polyolefine GmbH · DE

Inventors

Giuseppe Penzo · Mantova, IT
Gerhardus Meier · Frankfurt, DE
Ulf Schueller · Weiterstadt, DE
Pietro Baita · Rovigo, IT
Giulia Mei · Ferrara, IT
Elke Damm · Bad Vilbel, DE

Key dates

Filing date	Dec 16, 2019
Grant date	Oct 1, 2024
Priority date	—
Expiry date	Sep 21, 2041

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F2/34
WIPO fieldChemical engineering
WIPO sectorChemistry

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.