The present disclosure is directed to a method for making a MER framework type zeolite, a MER framework type zeolite having a stick-like morphology, and processes for the selective separation of carbon dioxide (CO.sub.2) from multi-component feedstreams containing CO.sub.2 using the zeolite.

The present disclosure is directed to a method for making a MER framework type zeolite, a MER framework type zeolite having a stick-like morphology, and processes for the selective separation of carbon dioxide (CO.sub.2) from multi-component feedstreams containing CO.sub.2 using the zeolite.

The present inventive concept relates to an aluminosilicate structure body with a novel crystal structure and, more specifically, to an aluminosilicate structure body having a novel crystal structure and a skein-shaped morphology, a method for preparing the same, and an HPLC column filled with the same as a stationary phase. The aluminosilicate structure body according to the present inventive concept has a novel crystal structure and a skein-shaped morphology, and thus has a specific surface area increased to up to 300 m.sup.2/g so as to improve separation ability; and does not undergo a structural change with pH changes, and thus can be usefully used in a wider range of pH conditions than existing silica gel which has been conventionally used as a stationary phase for HPLC columns.

The present inventive concept relates to an aluminosilicate structure body with a novel crystal structure and, more specifically, to an aluminosilicate structure body having a novel crystal structure and a skein-shaped morphology, a method for preparing the same, and an HPLC column filled with the same as a stationary phase. The aluminosilicate structure body according to the present inventive concept has a novel crystal structure and a skein-shaped morphology, and thus has a specific surface area increased to up to 300 m.sup.2/g so as to improve separation ability; and does not undergo a structural change with pH changes, and thus can be usefully used in a wider range of pH conditions than existing silica gel which has been conventionally used as a stationary phase for HPLC columns.

A functional structural body that can realize a prolonged life time by suppressing the decrease in function and that can fulfill resource saving without requiring a complicated replacement operation is provided. A functional structural body includes a skeletal body of a porous structure composed of a zeolite-type compound; and at least one solid acid present in the skeletal body, the skeletal body has channels connecting with each other, and the solid acid is present at least in the channels of the skeletal body.

A hydrocarbon adsorbent having a high hydrocarbon desorption start temperature and a method for adsorbing hydrocarbons that uses the hydrocarbon adsorbent are provided. The hydrocarbon adsorbent includes an alkali metal and a zeolite having a ring structure that includes at least 10 members is used. In the hydrocarbon adsorbent, a content of the alkali metal is 1 to 40 mass % based on a total mass of the hydrocarbon adsorbent, a content of the zeolite having a ring structure that includes at least 10 members is 99 to 60 mass % based on the total mass of the hydrocarbon adsorbent, and at least a portion of the alkali metal is in a state of being ion-exchangeable.

A hydrocarbon adsorbent having a high hydrocarbon desorption start temperature and a method for adsorbing hydrocarbons that uses the hydrocarbon adsorbent are provided. The hydrocarbon adsorbent includes an alkali metal and a zeolite having a ring structure that includes at least 10 members is used. In the hydrocarbon adsorbent, a content of the alkali metal is 1 to 40 mass % based on a total mass of the hydrocarbon adsorbent, a content of the zeolite having a ring structure that includes at least 10 members is 99 to 60 mass % based on the total mass of the hydrocarbon adsorbent, and at least a portion of the alkali metal is in a state of being ion-exchangeable.

Provided is a beta-type zeolite which has a high catalytic activity and is not easily deactivated.

The beta-type zeolite of the invention has a substantially octahedral shape, has a Si/Al ratio of 5 or more, and is a proton-type zeolite. The Si/Al ratio is preferably 40 or more. This beta-type zeolite is preferably obtained by transforming a raw material beta-type zeolite synthesized without using a structure directing agent into an ammonium-type zeolite through ion exchange, then, exposing the beta-type zeolite to water vapor, and subjecting the exposed beta-type zeolite to an acid treatment.

Provided is a beta-type zeolite which has a high catalytic activity and is not easily deactivated.

The beta-type zeolite of the invention has a substantially octahedral shape, has a Si/Al ratio of 5 or more, and is a proton-type zeolite. The Si/Al ratio is preferably 40 or more. This beta-type zeolite is preferably obtained by transforming a raw material beta-type zeolite synthesized without using a structure directing agent into an ammonium-type zeolite through ion exchange, then, exposing the beta-type zeolite to water vapor, and subjecting the exposed beta-type zeolite to an acid treatment.

To provide a hydrocarbon reforming/trapping material which is capable of adsorbing and reforming a hydrocarbon. A hydrocarbon reforming/trapping material of the present invention has an SiO.sub.2/Al2O.sub.3 ratio of from 7 to 12, and contains an Fe(II)-substituted beta zeolite which is ion-exchanged by Fe(II) ions. The amount of supported Fe(II) is preferably 0.001-0.5 mmol/g with respect to the Fe(II)-substituted beta zeolite. This Fe(II)-substituted beta zeolite is suitably produced by dispersing and mixing a beta zeolite having an SiO.sub.2/Al.sub.2O.sub.3 ratio of from 7 to 12 in an aqueous solution of a water-soluble compound of divalent iron, and mixing and stirring the solution, so that Fe(II) ions are supported on the beta zeolite.