Zeolite formed product, zeolite laminate intermediate, zeolite laminate composite and method for their preparation

A method for producing a zeolite layered composite, comprising layering a template-containing zeolite membrane having substantially the same composition as that of a zeolite shaped body of an incompletely crystallized zeolite and composed of tetrapropylammonium ion (TPA) and silica sol in a mixing ratio (TPA/SiO2) of 0.02 to 0.12 by mole and containing a template therein on said zeolite shaped body, and simultaneously removing a template from said zeolite membrane and said zeolite shaped body by calcining the resulting layered product to obtain a zeolite layered composite comprising said zeolite shaped body and said zeolite membrane layered thereon.

A method for producing a zeolite layered intermediate body, comprising preparing a solution by adding a tetrapropylammonium hydroxide (TPAOH) solution to silica sol so that a mixing ratio (TPA/SiO2) of tetrapropylammonium ion (TPA) to said silica sol is 0.015 to 0.08 by mol, drying said prepared solution by kneading, wet pulverizing said dried solution to obtain a slurry, spray drying said slurry to obtain a dried granular substance, shaping said dried granular substance to form a shaped product, subjecting said shaped product to crystallization treatment to obtain a zeolite shaped body, immersing said zeolite shaped body in a solution having substantially the same composition as said prepared solution, and forming a template-containing zeolite membrane on said zeolite shaped body by hydrothermally synthesizing said template-containing zeolite membrane thereon to produce a layered body comprising said zeolite shaped body and said template-containing zeolite membrane.

A method for producing a zeolite layered intermediate body, comprising preparing a solution adding a tetrapropylammonium hydroxide (TPAOH) solution to silica sol so that a mixing ratio (TPA/SiO2) of tetrapropylammonium ion (TPA) to said silica sol is 0.015 to 0.08 by mole, spray drying said prepared solution, shaping said spray dried solution to form a shaped product, subjecting said shaped product to crystallization treatment to obtain a zeolite shaped body, immersing said zeolite shaped body in a solution with substantially the same composition as that of said prepared solution, and forming a template-containing zeolite membrane on said zeolite shaped body by hydrothermally synthesizing said template-containing zeolite membrane thereon to produce a layered body comprising said zeolite shaped body and said template-containing zeolite membrane.

A method for producing a zeolite layered composite, comprising preparing a solution by adding a tetrapropylammonium hydroxide (TPAOH) solution to silica sol in so that a mixing ratio (TPA/SiO2) of tetrapropylammonium ion (TPA) to said silica sol is 0.015 to 0.08 by mol, drying said prepared solution by kneading, wet pulverizing said dried solution to form a slurry, spray drying said slurry to obtain a dried granular product, shaping said dried granular substance to form a shaped product, subjecting said shaped product to crystallization treatment to obtain a zeolite shaped body, immersing said zeolite shaped body in a solution with substantially the same composition as to that of said prepared solution, and forming a template-containing zeolite membrane on the zeolite shaped body by hydrothermally synthesizing said template-containing zeolite membrane thereon to produce a layered body comprising said zeolite shaped body and said template-containing zeolite membrane, and then removing a template by calcining said layered body.

A method for producing a zeolite layered composite, comprising preparing a solution by adding a tetrapropylammonium hydroxide (TPAOH) solution to silica sol so that a mixing ratio (TPA/SiO2) of tetrapropylammonium ion (TPA) to said silica sol is 0.015 to 0.08 by mol, spray drying said prepared solution, shaping said spray dried solution to form a shaped product, subjecting said shaped product to crystallization treatment to obtain a zeolite shaped body, immersing said zeolite shaped body in a solution with substantially the same composition as that of said prepared solution, forming a template-containing zeolite membrane on said zeolite shaped body by hydrothermally synthesizing said template-containing zeolite membrane thereon to produce a layered body comprising said zeolite shaped body and said template-containing zeolite membrane, and then removing a template by calcining said layered body.