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US 2022/0033271 A1Published application
Low pressure synthesis of zeolite ssz-13
AssigneeChevron U.S.A. Inc.
InventorStacey Ian ZONES
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Abstract
A method is described for the synthesis of aluminosilicate CHA framework type molecular sieves at ambient pressure via interzeolite conversion from FAU framework type zeolites.
Claims14
A method of synthesizing a molecular sieve of CHA framework type, the method comprising the steps of:
- (1) preparing a reaction mixture comprising:
- (a) a source of silicon and aluminum, where the source of both silicon and aluminum is a zeolite of FAU framework type;
- (b) a source of an alkali or alkaline earth metal (M);
- (c) a CHA structure directing agent (Q);
- (d) a source of hydroxide ions;
- and
- (e) water;
- and
- (2) heating the reaction mixture at ambient pressure and at a temperature of from 50° C. to 90° C. until crystals of the molecular sieve are formed.
6 more elements
Dependencies are inferred from the claim text.