Back to results
US 5,558,851 AGranted
Preparation of aluminosilicate zeolites
AssigneeChevron U.S.A. Inc.
InventorStephen J. Miller
Life of this patent
Estimating the term…
Abstract
A method is disclosed for preparing a crystalline aluminosilicate zeolite from a reaction mixture containing only sufficient water so that the reaction mixture may be shaped if desired. In the method, the reaction mixture is heated at crystallization conditions and in the absence of an external liquid phase, so that excess liquid need not be removed from the crystallized material prior to drying the crystals.
Claims52
A method for preparing a crystalline zeolite, said method comprising:
- a. preparing a reaction mixture comprising at least one active source of a first oxide selected from the group consisting of an oxide of silicon, germanium or both, optionally at least one active source of a second oxide selected from the group consisting of an oxide of aluminum, boron, gallium, iron or a mixture thereof, an organic templating agent capable of forming said crystalline zeolite, and sufficient water to shape said mixture;
- and
- b. heating said reaction mixture at crystallization conditions and in the absence of an added external liquid phase for sufficient time to form a crystallized material containing crystals of said zeolite, wherein said zeolite crystals have a first oxide/second oxide molar ratio greater than 12.
A method for preparing a shaped crystalline zeolite, said method comprising:
- a. preparing a reaction mixture comprising at least one active source of a first oxide selected from the group consisting of an oxide of silicon, germanium or both, optionally at least one active source of a second oxide selected from the group consisting of an oxide of aluminum, boron, gallium, iron or a mixture thereof, an organic templating agent capable of forming said crystalline zeolite, and sufficient water to shape said mixture;
- b. forming said reaction mixture into shaped particles;
- and
- c. heating said shaped particles at crystallization conditions and in the absence of an added external liquid phase for sufficient time to form crystals of said zeolite within said shaped particles, wherein said zeolite crystals have a first oxide/second oxide molar ratio greater than 12.
1 more element
Dependencies are inferred from the claim text.