Patent ID: 7629397
Filing Date: 2009-12-08
Classification: C08C,C08F

Abstract:
1. A post-polymerization process for separating a hydrocarbon-rubber from a polymer slurry having said hydrocarbon-rubber dispersed within a diluent, which comprises the steps of: (a) contacting said polymer slurry with a hydrocarbon solvent capable of dissolving said hydrocarbon-rubber, to produce a first essentially homogeneous liquid phase and a second essentially homogeneous liquid phase; and (b) separating said first liquid phase from said second liquid phase, wherein said diluent comprises a hydrofluorocarbon, said first liquid phase comprises at least 60 wt % of said hydrofluorocarbon based on the total weight of said hydrofluorocarbon in said polymer slurry, and said second liquid phase comprises at least 90 wt % of the hydrocarbon-rubber based on the total weight of said hydrocarbon-rubber in said polymer slurry.