Patent ID: 11904303
Assignee: PACIFIC INDUSTRIAL DEVELOPMENT CORPORATION
Field: Chemical engineering (Chemistry)
Classification: CPC B  C  F | IPC B  C  F

Claim 0:
1. A method of making an AFX zeolite, the method comprising the steps of:
a) providing a source of silica;
b) providing a source of alumina;
c) providing a structure directional agent (SDA); wherein the amount of the SDA is characterized by the molar ratio, OH:SiO2, of base, OH—, to silica, SiO2;
d) providing a source of metal cations;
e) mixing the source of silica and alumina with the SDA and the source of metal cations in water to form a gel composition;
f) providing an additional source of a base, OH— to the gel composition;
g) heating the gel composition to a crystallization temperature that is less than 225° C.;
h) maintaining the gel composition at the crystallization temperature for a time period that ranges from 24 hours to 48 hours;
i) allowing the AFX zeolite to crystallize and precipitate; the gel composition forming a crystalline precipitate of the AFX zeolite and a mother liquid; and
j) separating the crystalline precipitate from the mother liquid;
wherein the, OH:SiO2, molar ratio ranges from 0.7:1 to 0.9:1;
wherein the formed AFX zeolite exhibits a silica to alumina, SiO2:Al2O3, molar ratio (SAR) that is between 8:1 and 26:1;
wherein the formed AFX zeolite has a morphology that includes one or more of cubic, spheroidal, or rhombic particles;
wherein the formed AFX zeolite exhibits a crystal size that is in the range of about 0.1 micrometer (μm) to 10 μm.