Ministry of International Trade & Industry

Agency of Industrial Science and Technology

Agency of Industrial Science and Technology Ministry of International

Agency of Industrial Science

National Institute of Advanced Industrial Science and Technology

Japan as Represented by the Seccretary of Agency of Industrial Science and Technolopgy

Kenzi Suzuki

Toshiaki Mori

Keiichi Inukai

Masakazu Horio

Kaoru Kawase

Shozo Iida

Hiroshi Sakami

Shinji Tomura

Eiji Watanabe

Velu Subramani

Nasakazu Horio

Hiroyuki Masuda

Satoru Fujita

Toshihiko Osaki

Yasuji Sakaguchi

The present invention relates to an active oxygen developing substance composed of an aluminosilicate obtained by heating hydrogarnet as a precursor substance at 700&#xb0; C. or higher; an aluminosilicate catalyst supporting cobalt oxide, produced by supporting cobalt oxide on the surface of the aluminosilicate; a method for manufacturing these; and applications of these as oxidation catalysts, solid electrolytes, oxygen occlusion carriers, and so forth.

Inorganic compound containing active oxygen and process for producing the same

The present invention provides a method of producing a CuZnAlZr oxide catalyst consisting of reacting an aqueous NaOH solution and aqueous NaCOsolution with a mixture of aqueous solutions of each nitrate of Cu, Zn, Al, and Zr, producing a precipitate by coprecipitation, aging, filtering, washing and drying this precipitate to prepare a catalyst precursor consisting of a CuZnAlZr layered double hydroxide, and then obtaining a CuZnAlZr oxide by calcining this precursor in an air ambient atmosphere, a CuZnAlZr oxide catalyst, a CuZnZrCe oxide catalyst, a CoCuZnAl oxide catalyst for producing hydrogen by oxidative steam reforming a methanol, and methods of producing hydrogen gas consisting of converting methanol to hydrogen gas by oxidative steam reforming in the presence of air and steam using these oxide catalysts.

Catalysts for oxidative steam reforming of methanol as a new and efficient method for the selective production of hydrogen for fuel cells and their synthesis method

Selective separation and recovery of gaseous components of hot waste gas of combustion containing carbon dioxide is attained by causing the hot waste gas to contact an adsorbent containing as a substantial main component thereof an inorganic solid substance exhibiting surface basicity and inducing adsorption of the gaseous components of the hot waste gas on the adsorbent and then selectively separating the adsorbed gaseous components by virtue of differences in retention time among the gaseous components on the adsorbent.

Method for selective separation of carbon dioxide from waste gas of

A mixed gas consisting of carbon dioxide and nitrogen is separated into the component gases by a method which comprises treating sepiolite with nitric acid, subjecting the treated sepiolite to an ion-exchange treatment thereby exchanging the cationic metal present in the treated sepiolite with Mg ions, heating the sepiolite resulting from the ion-exchange treatment, and exposing the ultimately prepared sepiolite to the mixed gas.

Method for separation of nitrogen and carbon dioxide by means of

Separation of nitrogen and carbon dioxide is accomplished by a method using as a separating material one member selected from the group consisting of sepiolite in the unmodified form, sepiolite which has been heat-treated, and sepiolite which has had part or the whole of the exchangeable cation thereof replaced with zinc ion and which has been subsequently subjected to a heat treatment.

Method for separation of nitrogen and carbon dioxide by use of ceramic

An interlayer cross-linked clay used in a hydrothermal reaction is enabled to remain stable in the hydrothermal treatment by forming a suspension of the interlayer cross-linked clay in combination with an organic compound. The interlayer cross-linked clay used in the hydrothermal reaction under these conditions has carbon deposited on the pillars of the clay and remains stable when it is used in other hydrothermal reactions.

Method for stably retaining an interlayer cross-linked clay under

A pillared clay possessing the ability to exchange cations is produced by a method which comprises heating a cation-exchange clay consisting of (1) silicate layers composed of octahedrons of alumina having part of the aluminum thereof substituted by magnesium or octahedrons of magnesia having part of the magnesium thereof substituted by lithium and tetrahedrons of silica and parallelly arranged in a state assuming negative electric charge and (2) exchangeable cations interposed between the silicate layers in a state retaining an electric charge balance with the negative electric charge of the silicate layers, thereby causing part of the exchangeable cations to be fixed in the silicate layers and inducing a decrease in the cation-exchange capacity of the clay, then cross-linking the interstices between the silicate layers of the clay, and thereafter causing liberation of the fixed cations. By causing a pillared clay which possesses the ability to exchange cations to be further cross-linked with pillars different from the pillars used in the clay, a pillared clay having pillars of a plurality of kinds is produced. By causing a pillared clay which possesses the ability to exchange cations to be further cross-linked with pillars identical with the pillars used in the clay, a pillared clay containing increased amounts of pillars is obtained.

Method for production of pillared clay having cation-exchange capacity

An interlayer cross-linked smectite is produced by a method which includes the steps of preparing a smectite suspension containing a dissolved water-soluble macromolecular compound, adding a cationic hydroxide oligomer to the suspension thereby subjecting the exchangeable cation in the smectite to ion exchange, allowing the resultant smectite suspension to stand at a fixed temperature for a fixed time thereby allowing the cationic hydroxide oligomer of the smectite to age, separating a solid smectite from the resultant suspension, and heating the separated solid smectite. The interlayer interval of the produced smectite can be controlled by adjusting the amount of the cationic hydroxide oligomer.

Method for production of silicate interlayer cross-linked smectite

A pillared clay possessing a desired amount of pillers is produced by heating clay thereby changing the cation-exchange capacity owned by the clay and then adding a cation oligomer as a pillar precursor to the clay thereby causing the oligomer to exchange ion with the cation of the clay.

Method for production of pillared clay

The cation-exchange capacity of montmorillonite decreased in consequence of fixation of ion is restored by subjecting the montmorillonite to a hydrothermal treatment.

Method for enhancing cation-exchange capacity of montmorillonite

An amorphous substance obtained by mixing volcanic ash with or without added clay and water and, if necessary, a surfactant, kneading the mixture, and shaping and firing. Additives such as camphor or naphthalene may be included prior to firing for plasticity and to form pores. The resultant mixture possesses an ability to adsorb phosphorus selectively. When this substance is placed in contact with a phosphorus-containing liquid, it removes phosphorus from the liquid.

Adsorbent for phosphorus and method for production of adsorbent for

A microporous separating material is produced by a method which comprises preparing a mixture of (1) macromolecular quaternary ammonium salt having a quaternary amine linked to a water-soluble macromolecular compound and possessing basicity, (2) a polymer of a polyoxyethylene alkylvinyl monomer and a vinyl monomer possessing basicity, or (3) a polymer of a halogenide of a quaternary amine, i.e. a basic macromolecular compound, and at least one water-soluble macromolecular substance selected from the group consisting of cellulose, polyvinyl alcohol, polyethylene oxide, and polyacrylamide with a smectite type mineral, mixing the aforementioned mixture with an inorganic substance in a water-soluble state, drying the resulting mixture, and firing the dried mixture.

Method for production of microporous separating material from smectite

Finely porous clay having crystal layers separated by intervals of at least 20 .ANG. and having a smectite type mineral as a main component thereof. This finely porous clay is manufactured by mixing the smectite type mineral with water, a water-soluble polymer, and an inorganic substance and drying or heating the resultant mixture.

Growing community of inventors

Aichi, Japan

Kenzi Suzuki