High Performance Mixed Matrix Membranes Incorporating at Least Two Kinds of Molecular Sieves

摘要

The present invention discloses a new type of high performance mixed matrix membranes (MMMs) and methods for making and using the same. The MMMs comprise a continuous polymer matrix and at least two types of molecular sieves dispersed therein. The continuous polymer matrix in the MMM contains at least one type of polymer. The MMM in the form of a dense film, asymmetric flat sheet membrane or otherwise prepared exhibits simultaneously improved selectivity and permeability for gas separations compared to polymer membranes made from a continuous polymer matrix without any molecular sieves or with only one type of molecular sieve. MMMs of the present invention are suitable for a wide range of gas, vapor, and liquid separations such as alcohol/water, CO₂/CH₄, H₂/CH₄, O₂/N₂, CO₂/N₂, olefin/paraffin, iso/normal paraffins, and other light gases separations.