STA-30, a new member of the SWY family of molecular sieves, methods of preparation and use
OwnerRuxandra Georgiana Chitac, Nicholas McNamara +2inventors
InventorsRuxandra Georgiana Chitac, Nicholas McNamara, Alessandro Turrina, Paul Anthony Wright
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Abstract
The present invention is directed to a method of preparing a molecular sieve of SWY framework type, denominated STA-30. STA-30 is synthesized using 1,4-diazabicyclo[2.2.2]octane, 1-azabicyclo[2.2.2]octane derivates and combinations thereof as structure directing agents. The resulting molecular sieve is useful as catalysts, particularly when used in combination with exchanged transition metal(s) for the Selective Catalytic Reduction (SCR) of NO.
Claims20
A molecular sieve comprising a SWY type framework (STA-30), wherein the molecular sieve has a molar relationship:
- Al2O3:(n)SiO2, wherein n represents the molar ratio of SiO2 to Al2O3.
A method for synthesizing an aluminosilicate molecular sieve comprising a SWY type framework (STA-30), the method comprising:
- (1) forming heating a reaction mixture comprising:
- (a) at least one source of silicon oxide;
- (b) at least one source of aluminum oxide;
- (c) a source of alkali or alkaline earth metal cations;
- (d) a source of a structure directing agent (SDA);
- (e) a source of hydroxide ions;
- and (f) water;
- (2) forming aluminosilicate molecular sieve crystals having an STA-30 framework and the structure directing agent, and
- (3) recovering at least a portion of the aluminosilicate molecular sieve crystals from the reaction mixture.
Dependencies are inferred from the claim text.