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US 12,623,909 B2Granted
Molecular sieve SSZ-121 with high acidity, its synthesis and use
AssigneeChevron U.S.A. Inc.
InventorStacey I. Zones
Life of this patent
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Abstract
A novel synthetic crystalline aluminogermanosilicate molecular sieve material, designated SSZ-121 is provided which exhibits increased acidity. The SSZ-121 can be synthesized using 1,3-bis(1-adamantyl)imidazolium cations as a structure directing agent. The synthesis employs a boron pathway to achieve increased acid sites. The SSZ-121 of increased acidity may be used in organic compound conversion reactions and/or sorptive processes.
Claims9
A method of synthesizing a SSZ-121 molecular sieve having increased acid sites, the method comprising:
- (1) preparing a reaction mixture comprising:
- (a) a FAU framework type zeolite having a SiO2/Al2O3 mol ratio of at least 300;
- (b) a source of germanium;
- (c) a source of boron;
- (d) a structure directing agent comprising 1,3-bis(1-adamantyl)imidazolium cations (Q);
- (e) a source of fluoride ions;
- and
- (f) water;
- (2) subjecting the reaction mixture to crystallization conditions sufficient to form crystals of a molecular sieve containing boron;
- (3) removing structure directing agent (Q);
- and
- (4) replacing some of the boron in the crystals of the molecular sieve with aluminum.
9 more elements
Dependencies are inferred from the claim text.