SEPARATION MEMBRANE MANUFACTURING METHOD

摘要

Provided is a separation membrane manufacturing method capable of manufacturing fine separation membranes simply. The separation membrane manufacturing method is provided with a membrane-producing process of forming a separation membrane precursor (3) obtained from a separation membrane precursor solution on the surface side of the cells formed in a porous monolith substrate (1), and a drying process of drying the separation membrane precursor (3) by ventilation drying, which passes hot air (15) through the cells (2) of the monolith substrate (1) in which the separation membrane precursor (3) is formed. In the ventilation drying of the drying process, the temperature of the monolith substrate (1) in which the separation membrane precursor (3) is formed is raised to 90°C within 15 minutes from starting the passage of the hot air (15) at a temperature increase rate that gives a mean temperature increase rate from the beginning of the passage of hot air until reaching 90°C of 7°C/min or more.