Abstract: Provided is a method for producing a beta zeolite, the method including bringing a beta zeolite parent powder synthesized without using an organic structure-directing agent into contact with an alkaline aqueous solution having a pH of 12 or higher. The liquid temperature of the alkaline aqueous solution is preferably se to 40° C. or above and 100° C. or below. The ratio of the parent powder to the alkaline aqueous solution is preferably set to 10 g/L or greater and 1000 g/L or less. The contact time is preferably 0.5 hours or longer and 48 hours or shorter. The SiO2/Al2O3 molar ratio is preferably s16 or less.

Abstract: The present disclosure relates to a process for the preparation of a zeolitic material having a CHA-type framework structure comprising YO2 and X2O3, wherein the process comprises: (1) providing a mixture comprising one or more sources for YO2, one or more sources for X2O3, one or more tetraalkylammonium cation R1R2R3R4N+-containing compounds, and one or more tetraalkylammonium cation R5R6R7R8N+-containing compounds as structure directing agent; (2) crystallizing the mixture to obtain a zeolitic material having a CHA-type framework structure; wherein Y is a tetravalent element and X is a trivalent element, wherein R1, R2, R3, R5, R6, and R7 independently from one another stand for alkyl, wherein R4 stands for CnH2nOH with n=1 to 6, and wherein R8 stands for cycloalkyl.

Abstract: Provided are a zeolite with increased hydrothermal durability and a method of manufacturing the same. One aspect of the present invention provides a method of producing the zeolite, comprising the steps of: preparing a raw material zeolite (excluding FAU-type zeolite material) containing at least Si but not Al in the framework or having a Si/Al atomic ratio of 50 or more, and bringing the zeolite material into contact with a solution containing fluoride ions or with hot water at a temperature of 50° C. or more and 250° C. or less.

Abstract: A batch process for preparing a zeolitic material having framework type CHA and a framework structure comprising Si, Al, O, and H, comprising (i) providing a seeding material comprising a zeolitic material having framework type CHA and a framework structure comprising Si, Al, O, and H; (ii) preparing a mixture comprising a source of Si, a source of Al, a seeding material provided in (i), a CHA framework structure directing agent comprising a cycloalkylammonium compound, and water, wherein the cycloalkylammonium compound is a compound comprising a cation R1R2R3R4N+ wherein R1, R2, R3 are, independently from one another, an alkyl residue having from 1 to 6 carbon atoms, and R4 is a 5- to 8-membered cycloalkyl residue, wherein in mixture, the molar ratio of water relative to Si comprised in the source of Si and in the seeding material, calculated as SiO2, is in the range of from 5:1 to 15:1, wherein the mixture, the molar ratio of sodium, calculated as Na2O, relative to Si comprised in the source of Si and in th

Abstract: The purpose of the present invention is to provide a beta zeolite which includes zinc and has a small particle size. This beta zeolite includes a silicon oxide and a zinc oxide, and has an average particle size of 50 to 100 nm at a cumulative frequency of 50% in a particle size distribution measured by scanning electron microscope observation.

Abstract: The purpose of the present invention is to provide a beta zeolite which includes zinc and has a small particle size. This beta zeolite includes a silicon oxide and a zinc oxide, and has an average particle size of 50 to 100 nm at a cumulative frequency of 50% in a particle size distribution measured by scanning electron microscope observation.

Abstract: The method for producing an MTW-type zeolite according to the present invention includes: mixing a silica source, an alumina source, an alkali source, a lithium source, and water so as to obtain a reaction mixture having a composition represented by specific molar ratios; (2) adding an MTW-type zeolite which has a SiO2/Al2O3 ratio of 10 to 500 and does not contain an organic compound, as a seed crystal, to the reaction mixture in a proportion of 0.1 to 20% by weight relative to the silica component in the reaction mixture; and (3) airtightly heating the reaction mixture, to which the seed crystal has been added, at 100 to 200° C.

Abstract: 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 zinc silicate beta zeolite as a seed crystal with a reaction mixture containing a silica source, an alumina source, an alkali source, and water.

Abstract: 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 80-200° C. in a hermetically closed state. M1 represents silicon or a mixture of silicon and germanium.

Abstract: Provided is a method that is for producing a PAU zeolite and that can have an environmental impact that is reduced 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.

Abstract: The method for producing an MTW-type zeolite according to the present invention includes: mixing a silica source, an alumina source, an alkali source, a lithium source, and water so as to obtain a reaction mixture having a composition represented by specific molar ratios; (2) adding an MTW-type zeolite which has a SiO2/Al2O3 ratio of 10 to 500 and does not contain an organic compound, as a seed crystal, to the reaction mixture in a proportion of 0.1 to 20% by weight relative to the silica component in the reaction mixture; and (3) airtightly heating the reaction mixture, to which the seed crystal has been added, at 100 to 200° C.

Abstract: A method for producing an MTW-type zeolite, comprising (1) mixing an alumina source, an alkali source, a lithium source, and water so as to obtain a reaction mixture (2) Adding a seed crystal of an MTW-type zeolite before or while a silica source is added to the reaction mixture in a proportion of 0.1 to 20% by weight relative to the silica component in the reaction mixture. Mixing and stirring the reaction mixture. Wherein the MTW-type zeolite of the seed crystal has a SiO2/Al2O3 ratio of 10 to 500 and does not contain an organic compound. The reaction mixture has a composition represented by the following molar ratios: SiO2/Al2O3=12 to 200, Na2O/SiO2=0.1 to 0.3, Li2O/(Na2O+Li2O)=0.05 to 0.5 and H2O/SiO2=10 to 50. (3) Air tightly heating the reaction mixture, to which the seed crystal of the MTW type zeolite has been added, at 100 to 200° C.

Abstract: 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 80-200° C. in a hermetically closed state. M1 represents silicon or a mixture of silicon and germanium.

Abstract: 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 zinc silicate beta zeolite as a seed crystal with a reaction mixture containing a silica source, an alumina source, an alkali source, and water.

Abstract: Provided is a method that is for producing a PAU zeolite and that can have an environmental impact that is reduced 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.

Abstract: The method for producing an MTW-type zeolite according to the present invention includes: mixing a silica source, an alumina source, an alkali source, a lithium source, and water so as to obtain a reaction mixture having a composition represented by specific molar ratios; (2) adding an MTW-type zeolite which has a SiO2/Al2O3 ratio of 10 to 500 and does not contain an organic compound, as a seed crystal, to the reaction mixture in a proportion of 0.1 to 20% by weight relative to the silica component in the reaction mixture; and (3) airtightly heating the reaction mixture, to which the seed crystal has been added, at 100 to 200° C.