Patent ID: 8399586

Claim:
A process for feeding ethylene into a polymerization system operating in a liquid phase or supercritical phase comprising: providing a low-pressure ethylene stream, one or more low-pressure C 3 to C 20 monomer streams, a low-pressure ethylene-depleted recycle stream, an optional low-pressure inert solvent/diluent stream, and one or more reactors configured in parallel, in series, or a combination thereof; metering the low-pressure ethylene stream, the one or more low-pressure C 3 to C 20 monomer streams, a low-pressure ethylene-depleted recycle stream, and the optional low-pressure inert solvent/diluent stream; blending upstream of the one or more reactors the metered low-pressure ethylene stream, the metered one or more low-pressure C 3 to C 20 monomer streams, the low-pressure ethylene-depleted recycle stream, and the metered low-pressure optional inert solvent/diluent stream to form an ethylene-carrying low-pressure blended liquid feed stream; pressurizing the ethylene-carrying low-pressure blended liquid feed stream to the polymerization system pressure with one or more high-pressure pumps to form an ethylene-carrying high-pressure blended reactor feed stream; and feeding the ethylene-carrying high-pressure blended reactor feed stream to the one or more reactors configured in parallel, in series, or a combination thereof.