Highly aromatic polymer alloy membrane of polyurea and polyurethane and its use in aromatic/non-aromatic separations

摘要

A polymer alloy or blend is disclosed consisting of polyurea and polyurethane components which polymer alloy is useful for separating aromatics from non-aromatics, such as, for example, naphtha upgrading or for use in the chemical industry. The membranes can be used under pervaporation or perstraction conditions. The alloy membrane is characterized by possessing high thermal stability in combination with high permeability and high selectivity.