Phase separator and monomer recycle for supercritical polymerization process

A process for polymerizing olefins, comprising the steps of: (a) contacting in a dense-fluid-homogeneous-polymerization system ("PS"), >30 wt % C3+ olefins with: catalyst, activator, 0-50 mol % comonomer, and 0-40 wt % diluent/solvent, at a temperature > PS Tc and a pressure no lower...

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Bibliographic Details
Main Authors KISS GABOR, BRANT PATRICK, FRIEDERSDORF CHRIS B
Format Patent
LanguageEnglish
Published 14.08.2012
Subjects
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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Summary:A process for polymerizing olefins, comprising the steps of: (a) contacting in a dense-fluid-homogeneous-polymerization system ("PS"), >30 wt % C3+ olefins with: catalyst, activator, 0-50 mol % comonomer, and 0-40 wt % diluent/solvent, at a temperature > PS Tc and a pressure no lower than 1 MPa below the PS cloud point pressure and <200 MPa; (b) forming a reactor effluent comprising polymer-monomer mixture; (c) optionally heating the mixture (b); (d) collecting the mixture (b) in a separation vessel; (e) reducing the pressure to form a two-phase mixture where the pressure in the reactor is 7-100 MPa higher than the pressure in the separation vessel and the temperature in the separation vessel is > the polymer or above 80° C., whichever is higher; (f) separating the monomer-rich phase from the polymer-rich phase; (g) recycling the separated monomer-rich phase and recovering polymer from the polymer-rich phase.
Bibliography:Application Number: US20070854936