Method for producing DDR type zeolite crystals and method for producing DDR type zeolite membrane
AssigneeNGK Insulators, Ltd.
InventorsTakeshi Hagio, Kenji Yajima, Makiko Ichikawa
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Abstract
Provided is a method for producing a DDR type zeolite crystal, the method including: a raw material solution preparing step of preparing a raw material solution by mixing at least silica, water, an organic solvent, and 1-adamantanamine that is a structure directing agent; and a DDR type zeolite crystal generating step of generating a DDR type zeolite crystal by performing a heating treatment on the raw material solution, in which the organic solvent is an organic solvent containing no amine, and the raw material solution is a raw material solution containing no PRTR substance.
Claims9
A method for producing a DDR zeolite crystal, the method comprising:
- a raw material solution preparing step of preparing a raw material solution by mixing at least silica, water, an organic solvent, and 1-adamantanamine that is a structure directing agent;
- and
- a DDR zeolite crystal generating step of generating a DDR zeolite crystal by performing a heating treatment on the raw material solution, wherein
- the organic solvent is an organic solvent containing no amine,
- the raw material solution is a raw material solution containing no ethylenediamine and potassium fluoride, and a value of the ratio of the content expressed in terms of mole of the silica in the raw material solution to the content expressed in terms of mole of the organic solvent in the raw material solution is 1 to 6, and
- wherein in the DDR zeolite crystal generating step, a DDR zeolite seed crystal is dispersed in the raw material solution and then the raw material solution is subjected to the heating treatment.
Dependencies are inferred from the claim text.