Abrégé

Provided is a method for producing a beta zeolite, which is a seed crystal addition method that is capable of reducing the environmental load as much as possible. A method for producing a beta zeolite according to the present invention comprises a step wherein a reaction mixture that contains a silica source, an alumina source, an alkali source and water and a seed crystal that is composed of a beta zeolite are mixed with each other and heated. A beta zeolite which comprises particles having a particle size of 10 μm or less in an amount of 90% or more on a volume basis in the particle size distribution as determined by a laser diffraction/scattering particle size distribution measuring method, and which is synthesized without using an organic structure-directing agent is used as the seed crystal.

Classes IPC  ?

• C01B 39/46 - Autres types caractérisés par leur diagramme de diffraction des rayons X et par leur composition définie

Abrégé

Provided are: a Mn+-substituted beta zeolite which is useful for the catalytic removal of nitrogen monoxide contained in a gas to be purified even when oxygen is contained in the gas at a high concentration or when the gas has a low temperature; and a method for producing the Mn+-substituted beta zeolite. The Mn+-substituted beta zeolite according to the present invention has a SiO2/Al2O3 ratio of 7 to 18, and is ion-exchanged by a Mn+ ion (wherein Mn+ represents a n-valent metal cation; n represents a numeral value of 1 to 3; and M represents an element selected from the group consisting of Ni, Co, Cu, Mn, Zn, Sn, Ag, Li, K, Cs, Au, Ca, Mg, Pt, Pd, Rh and Ir). The amount of the Mn+ ion carried on the Mn+-substituted beta zeolite is preferably 0.01 to 2.5 mmol/g relative to the amount of the Mn+-substituted beta zeolite.

Classes IPC  ?

• C01B 39/46 - Autres types caractérisés par leur diagramme de diffraction des rayons X et par leur composition définie
• B01J 20/18 - Tamis moléculaires zéolitiques synthétiques
• B01J 20/30 - Procédés de préparation, de régénération ou de réactivation

Abrégé

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 SiO2/Al2O3 ratio of from 7 to 12 (inclusive), 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 SiO2/Al2O3 ratio of from 7 to 12 (inclusive) in an aqueous solution of a water-soluble compound of divalent iron, and stirring the resulting solution, so that Fe(II) ions are supported by the beta zeolite.

Classes IPC  ?

• B01J 29/76 - Métaux du groupe du fer ou cuivre
• B01D 53/86 - Procédés catalytiques

Abrégé

A process for producing a VET-type zeolite is provided in which the use of a structure-directing agent is minimized and the environmental burden can be minimized. This process for producing a VET-type zeolite comprises (1) mixing a zinc source, an element M1 source, an alkali source, and water so as to result in a reaction mixture having a specific composition in terms of molar ratio, (2) using, as seed crystals, a VET-type zeolite which has an M1O2/ZnO ratio of 5-30 and adding the zeolite to the reaction mixture in an amount of 0.1-30 wt% relative to the M1O2 contained in the reaction mixture, and (3) heating the reaction mixture to which the seed crystals have been added, at 80-200ºC in a hermetically closed state. M1 represents silicon or a mixture of silicon and germanium.

Classes IPC  ?

• C01B 39/46 - Autres types caractérisés par leur diagramme de diffraction des rayons X et par leur composition définie

Abrégé

The purpose of/problem to be addressed by the present invention is to provide: an Fe(II)-substituted beta-type zeolite useful for the catalytic removal of a variety of gases; and a production method therefor. The SiO2/Al2O3 ratio in this Fe(II)-substituted beta-type zeolite is equal to or more than 7 but less than 10. This Fe(II)-substituted beta-type zeolite is obtained by being subjected to ionic exchange with Fe(II) ions. It is preferable that the Fe(II) loading amount be in the range of 0.001-0.4mmol/g of the Fe(II)-substituted beta-type zeolite. It is preferable that the Fe(II)-substituted beta-type zeolite be produced using a method in which a beta-type zeolite having an SiO2/Al2O3 ratio of equal to or more than 7 but less than 10 is dispersed in an Fe(II) water-soluble-compound aqueous solution, and then mixed and agitated to cause the beta-type zeolite to carry Fe(II) ions.

Classes IPC  ?

• C01B 39/46 - Autres types caractérisés par leur diagramme de diffraction des rayons X et par leur composition définie
• B01D 53/56 - Oxydes d'azote
• B01D 53/72 - Composés organiques non prévus dans les groupes , p. ex. hydrocarbures
• B01D 53/81 - Procédés en phase solide
• B01J 20/18 - Tamis moléculaires zéolitiques synthétiques
• B01J 20/30 - Procédés de préparation, de régénération ou de réactivation

Abrégé

The purpose of/problem addressed by the present invention is to provide: an Fe(II)-substituted MEL-type zeolite useful for the catalytic removal of a variety of gases; and a production method therefor. The SiO2/Al2O3 ratio in this Fe(II)-substituted MEL-type zeolite is in the range of 10-30 inclusive. This Fe(II)-substituted MEL-type zeolite is obtained by being subjected to ionic exchange with Fe(II) ions. It is preferable that the Fe(II) loading amount be in the range of 0.001-0.4mmol/g of the Fe(II)-substituted MEL-type zeolite. It is preferable that the Fe(II)-substituted MEL-type zeolite be produced using a method in which an MEL-type zeolite having an SiO2/Al2O3 ratio in the range of 10-30 inclusive is dispersed in an Fe(II) water-soluble-compound aqueous solution, and then mixed and agitated to cause the MEL-type zeolite to carry Fe(II) ions.

Classes IPC  ?

• C01B 39/46 - Autres types caractérisés par leur diagramme de diffraction des rayons X et par leur composition définie
• B01D 53/56 - Oxydes d'azote
• B01D 53/72 - Composés organiques non prévus dans les groupes , p. ex. hydrocarbures
• B01D 53/81 - Procédés en phase solide
• B01J 20/18 - Tamis moléculaires zéolitiques synthétiques
• B01J 20/30 - Procédés de préparation, de régénération ou de réactivation
• C01B 39/36 - Type pentasil, p. ex. types ZSM-5, ZSM-8 ou ZSM-11

Abrégé

　Provided is a method for producing a MAZ-type zeolite, the method having an environmental impact which has been reduced as much as possible whilst not using a structure-directing agent as far as possible. In the method for producing a MAZ-type zeolite according to the present invention: (1) a silica source, an alumina source, an alkali source and water are mixed so as to form a reaction mixture that has a composition represented by a specific molar ratio; (2) a MAZ-type zeolite, which has a SiO2/Al2O3 ratio of 5-10, has an average particle diameter of at least 0.1μm and does not contain an organic compound, is added, as a seed crystal, into the reaction mixture in an amount of 0.1-30 weight% relative to the silica components in the reaction mixture; and (3) the reaction mixture, into which the seed crystal has been added, is heated at 80-200˚C in a closed system.

Classes IPC  ?

• C01B 39/34 - Type ZSM-4 ou type Ω

Abrégé

The present invention provides a beta zeolite that is useful as a catalyst, adsorbent agent, or the like, and that is both microporous and mesoporous. The beta zeolite is characterized by (i) the SiO­2/Al2O3 ratio being 8-30, and the SiO2/ZnO ratio being 8-1000, (ii) the micropore surface area being 300-800 m2/g, (iii) the micropore volume being 0.1-0.3 cm3/g, and (iv) having mesopores having, in the state as synthesized, a diameter of 2-6 nm and a volume of 0.001-0.3 cm3/g. The beta zeolite is favorably produced by means of adding and reacting a zincosilicate beta zeolite as a seed crystal with a reaction mixture containing a silica source, an alumina source, an alkali source, and water.

Classes IPC  ?

• C01B 39/46 - Autres types caractérisés par leur diagramme de diffraction des rayons X et par leur composition définie

Abrégé

Provided is a method that is for producing a PAU zeolite and that can have an environmental impact that is as reduced as possible while, as much as possible, not using a structure-defining agent. The method for producing a PAU zeolite produces by means of (1) mixing a silica source, an alumina source, an alkali source, and water in a manner so as to result in a reaction mixture having a composition represented by a specific mole ratio, (2) using as the seed crystal a PAU zeolite that does not contain organic compounds and has a SiO2/Al2O3 ratio of 4-15 and an average particle size of at least 100 nm, and adding same to the reaction mixture at a ratio of 0.1-20 wt% with respect to the silica component in the reaction mixture, and (3) subjecting the reaction mixture to which the seed crystal has been added to sealed-vessel heating at 80-200°C.

Classes IPC  ?

• C01B 39/46 - Autres types caractérisés par leur diagramme de diffraction des rayons X et par leur composition définie

Abrégé

The purpose of the present invention is to provide a β-zeolite which has a high catalytic activity and is rarely deactivated. The β-zeolite according to the present invention is characterized by having an almost octahedral form, having an Si/Al ratio of 5 or more, and being of a proton type. The Si/Al ratio is preferably 40 or more. The β-zeolite is preferably one produced by carrying out the ion exchange of a raw material β-zeolite, which is synthesized without using any structure-directing agent, to transform the raw material β-zeolite into an ammonium-type β-zeolite, exposing the resultant β-zeolite to water vapor, and then subjecting the exposed β-zeolite to a treatment with an acid.

Classes IPC  ?

• C01B 39/48 - Autres types caractérisés par leur diagramme de diffraction des rayons X et par leur composition définie utilisant au moins un agent structurant organique
• B01J 29/70 - Zéolites aluminosilicates cristallinesLeurs composés isomorphes de types caractérisés par leur structure spécifique non prévus dans les groupes
• C07B 61/00 - Autres procédés généraux
• C07C 4/06 - Procédés catalytiques
• C07C 11/06 - Propène