Kanebo, Limited

Eiji Hayata

Chisato Marumo

Niro Shiomi

A molecular sieving carbon characterized by (A) having a structure in which a number of spherical carbonaceous particles having a particle diameter of 0.8 to 120 micrometers overlap and coalesce three-dimensionally at random, (B) in which continuous pathways running three-dimensionally at random exist between a number of the carbonaceous particles, (C) in which a number of the carbonaceous particles have each a number of micropores communicating with the pathways existing between the particles, and (D) having a carbon content of at least 85% by weight. The molecular sieving carbon is useful for obtaining, for example, a nitrogen gas, oxygen gas or gaseous mixture enriched with either the nitrogen gas or the oxygen gas from a gaseous mixture containing the nitrogen gas and oxygen gas.

Process for the production of molecular sieving carbon

Molecular sieving carbon

A method of separating at least a first gas from a gaseous mixture, in which a gaseous mixture containing a first and a second gas having different chemical compositions in an amount of at least 50% by volume based on the entire mixture is contacted with a carbonaceous porous body having a carbon content of at least 85% by weight and containing open cells in a three-dimensional network structure so that the open cells of the porous body form substantial flow passages for the gaseous mixture, thereby to adsorb at least the second gas physically on the porous body.

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Osaka, Japan

Eiji Hayata