Preparation of zeolites using organic template and amine
AssigneeChevron U.S.A. Inc.
InventorsStacey I. Zones, Yumi Nakagawa
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Abstract
Crystalline zeolites are prepared using a small quantity of an organic templating compound and a larger quantity of an amine component containing at least one amine having from one to eight carbon atoms, ammonium hydroxide, or mixtures thereof.
Claims50
A method for preparing a zeolite selected from the group consisting of large pore zeolites, medium pore zeolites having unidimensional channels, and small pore zeolites, said method comprising:
- A. forming an aqueous reaction mixture comprising (1) a source of an oxide selected from silicon oxide, germanium oxide and mixtures thereof;
- (2) a source of an oxide selected from aluminum oxide, gallium oxide, iron oxide, boron oxide, titanium oxide and mixtures thereof;
- (3) a source of an alkali metal oxide;
- (4) an amine component comprising at least one amine containing one to eight carbon atoms, ammonium hydroxide, and mixtures thereof, and (5) an organic templating compound capable of forming said zeolite in the presence of said amine, wherein said amine is smaller than said organic templating compound and wherein said organic templating agent is used in an amount less than that required to crystallize the zeolite in the absence of said amine component;
- and
- B. maintaining said aqueous mixture under sufficient crystallization conditions until crystals are formed.
A zeolite selected from the group consisting of large pore zeolites, medium pore zeolites having unidimensional channels, and small pore zeolites having an as-synthesized molar composition in an anhydrous state of (0.02 to 2.0Q:
- (0.02 to l.0)Z:
- (0.1 to 2.0)M.sub.2 O:W.sub.2 O.sub.3 :(10 to 200)YO.sub.2, wherein M is an alkali metal cation;
- W is selected from aluminum, gallium, iron, boron, titanium and mixtures thereof;
- Y is selected from silicon, germanium, and mixtures thereof;
- Z is an amine component comprising at least one amine containing from one to eight carbon atoms, ammonium hydroxide, and mixtures thereof, Q is an organic templating compound capable of forming the zeolite in the presence of said amine component, wherein said amine is smaller than the organic templating compound and wherein said organic templating agent is used in an amount less than that required to crystallize the zeolite in the absence of said amine component.
Dependencies are inferred from the claim text.