US 6,503,294 B2 · Permeable membrane and method

Abstract

Permeable membrane porous substrate and a functional layer provided on the surface of and/or inside the porous substrate, the functional layer having a hydrogen permeation rate of 1×10−10 mol/s·m2·Pa or more, and satisfying at least one of the following properties (1) through (3): (1) Hydrogen is selectively caused to permeate preferentially to water vapor. (2) When a test tube containing ethylene glycol and sealed with the permeable membrane is placed in a 85° C. oven, the ethylene glycol decrease rate measured is 1×10−2 g/hour or less, per square centimeter (1 cm2) of the permeable membrane. (3) When a test tube containing 5% ammonium adipate ethylene glycol solution and sealed with the permeable membrane is placed in a 85° C. oven for 2 days, the acid quantity of the solution is 5×10−3 equivalent or less, per square centimeter of the permeable membrane.

Claims16

Dependent claims

A permeable membrane, comprising a porous substrate and a functional layer provided on the surface of and/or inside the porous substrate, said functional layer having a hydrogen permeation rate of 1×10−10 mol/s·m2·Pa or more, and satisfying at least one of the following properties (1) through (3), as follows:

(1) Hydrogen is selectively caused to permeate preferentially to water vapor;
(2) When a test tube containing ethylene glycol and sealed with said permeable membrane is placed in a 85° C. oven, the ethylene glycol decrease rate measured is 1×10−2 g/hour or less, per square centimeter (1 cm2) of the permeable membrane;
and
(3) When a test tube containing 5% ammonium adipate ethylene glycol solution and sealed with said permeable membrane is placed in a 85° C. oven for 2 days, the acid quantity of the solution is 5×10−3 equivalent or less, per square centimeter of said permeable membrane.

1 more element

Dependencies are inferred from the claim text.

Permeable membrane and method

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Permeable membrane and method

Life of this patent

Abstract

Claims16