| abstract |
(57) [Object] To provide an electrolytic capacitor, a zeolite membrane having a large contact angle of water or ethylene glycol, and a capacitor including such a permeable membrane, useful for separating substances such as alcohol. And a method for treating the membrane. A zeolite membrane is treated with a treating agent having an active group that reacts with an OH group and becoming an inorganic oxide after firing, and water and / or steam to treat the zeolite membrane with a coupling agent. . Further, after a zeolite membrane and a treating agent having a functional group capable of reacting with a silanol group of the zeolite are brought into contact with each other in the absence of water, heat treatment and / or reduced pressure treatment is performed. The zeolite membrane subjected to such treatment has a large contact angle between water and ethylene glycol and a high hydrophobicity, and is useful for separating hydrogen, separating alcohol, and the like. |