Patent ID: 8263179
Filing Date: 2012-09-11
Classification: B01D

Abstract:
1. A process for production of a faujasite (FAU) zeolite separation membrane having a porous support and a zeolite layer formed on the surface of, and inside the pores of, the porous support, wherein the porous support has an alumina content of at least 90% with respect to the total weight of the porous support, the process comprising: a seed crystal-attaching step in which USY zeolite crystals are attached as seed crystals to the surface of, and inside the pores of, the porous support; a crude product-forming step in which: the porous support is contacted with a reaction solution containing silicon and aluminum at a molar ratio of silicon to aluminum (Si/Al) of 1.8 to 12.5, and the reaction solution is heated to form a crude product of the zeolite separation membrane; and a crude product-separating step in which the crude product of the zeolite separation membrane is separated from the reaction solution to afford the FAU zeolite separation membrane.