Patent ID: 8258069
Filing Date: 2012-09-04
Classification: B01D,C01B

Abstract:
1. A process for production of a zeolite separation membrane having a porous support and a zeolite layer formed on the porous support, the process comprising: a seed crystal attaching step in which zeolite seed crystals are attached to the porous support; a layer forming step in which: the porous support to which the zeolite seed crystals have been attached is contacted with a reaction solution containing zeolite raw material, and the temperature of the reaction solution is raised to a prescribed temperature to form the zeolite layer on the porous support; and a support separating step in which the porous support on which the zeolite layer has been formed is separated from the reaction solution; wherein in the layer forming step, after the start of contact between the porous support and reaction solution, the temperature of the reaction solution is held at or below 40° C. for a duration of between 30 minutes and 60 minutes before being raised to the prescribed temperature.