Patent ID: 11865499
Assignee: NGK INSULATORS, LTD.
Field: Chemical engineering (Chemistry)
Classification: CPC B | IPC B

Claim 0:
1. A zeolite membrane complex, comprising:
a support which is a longitudinal member having a length of 50 cm or more and has at least one through hole extending in a longitudinal direction; and
a zeolite membrane provided over an inner peripheral surface of said at least one through hole in said support or over an outer peripheral surface of said support, from one end portion of said support in said longitudinal direction to the other end portion thereof,
wherein among constituent elements of said zeolite membrane except oxygen, an element with the highest percentage is assumed as a main element, and in a case where the concentration of said main element of said zeolite membrane is measured at three portions defined by dividing said support into three equal parts in said longitudinal direction, said concentration of said main element gradually decreases from a portion on said one end portion side toward a portion on said other end portion side, and the ratio of said concentration of said main element at said portion on said other end portion side to that at said portion on said one end portion side is 0.90 or more and 0.983 or less.