Patent ID: 9499645
Filing Date: 2016-11-22
CPC Classification: C08F,G16C,Y02P

Claim Text:
1. A method to determine the curve of the liquid liquid equilibrium boundary as a function of molecular weight distribution (MWD) for a multitude of different products comprising from about 80 to about 100 wt. % of ethylene and about 0 up to about 20 weight % of one or more C 3-8 alpha olefins having a molecular weight from about 8,000 to about 500,000 produced in super critical ethylene in a high pressure reactor at temperatures from about 80° C. to about 350° C. and pressures from about 100 MPa to about 350 MPa comprising: a) modeling experimental or literature data for the liquid liquid equilibrium using an equation of state model to describe the effects of the molecular weight and the polydispersity of the polyethylene on the liquid liquid equilibrium curve b) determining the composition-specific parameters of the model from a); and, c) applying an equation of state selected from PC-SAFT, SAFT-VR, SAFT-LJ, soft SAFT, SW-PC-SAFT, CK-PC-SAFT, and GC-SAFT-VR to the temperature, pressure and composition conditions of the reaction to generate the liquid liquid equilibrium boundary and optionally the critical polymer concentration.