Synthesis of silicoaluminophosphates
AssigneeExxonMobil Chemical Patents Inc.
InventorsGuang Cao, Matu J. Shah
Life of this patent
Estimating the term…
Abstract
The invention is directed to a method of synthesising silicoaluminophosphate molecular sieves using synthesis templates that contain at least one dimethylamino moiety. The use of dimethylamino moiety containing templates results in good quality SAPO molecular sieves of CHA framework type.
Claims27
A process for preparing a crystalline silicoaluminophosphate molecular sieve of CHA framework type, which process comprises;
- a) forming a reaction mixture comprising a source of aluminum, a source of phosphorus, a source of silicon and at least one organic template which comprises one or more dimethylamino moieties, and
- b) inducing crystallization of crystalline molecular sieve of CHA framework type from the reaction mixture.
A silicoaluminophosphate molecular sieve, substantially of CHA framework type, comprising within its intra-crystalline structure at least one template which contains one or more N,N-dimethylamino moieties.
A silicoaluminophosphate molecular sieve, substantially of CHA framework type, comprising N,N-dimethylethanolamine within its intra-crystalline structure.
A crystalline silicoaluminophosphate molecular sieve having a characteristic X-ray powder diffraction pattern containing at least the d-spacings as set forth in Table Ia.
A silicoaluminophosphate molecular sieve, substantially of CHA framework type, comprising N,N-dimethylpropanolamine within its intra-crystalline structure.
A crystalline silicoaluminophosphate molecular sieve having a characteristic X-ray powder diffraction pattern containing at least the d-spacings as set forth in Table Ia.
A silicoaluminophosphate molecular sieve, substantially of CHA framework type, comprising 1-dimethylamino-2-propanol within its intra-crystalline structure.
A crystalline silicoaluminophosphate molecular sieve having a characteristic X-ray powder diffraction pattern containing at least the d-spacings as set forth in Table IIIa.
A formulated molecular sieve catalyst composition comprising at least one silicoaluminophosphate molecular sieve as claimed in 13 in admixture with at least one formulating agent.
Dependencies are inferred from the claim text.