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US 6,685,905 B2Granted
Silicoaluminophosphate molecular sieves
AssigneeExxonMobil Chemical Patents Inc.
InventorsMachteld M. Mertens, Brita Engels
Life of this patent
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Abstract
In SAPO manufacture, handling of the synthesis mixture is facilitated by providing an initial aluminium-containing aqueous slurry with an H2O:Al2O3 weight ratio of 3:1 to 8:1.
Claims11
A process for the manufacture of a silicoaluminophosphate molecular sieve, the process comprising:
- (i) forming a synthesis mixture comprising the steps of:
- (a) mixing an inorganic source of aluminium and water to form a first mixture having a water to aluminium, measured as Al2O3, ratio within the range of 3:1 to 8:1 by weight;
- (b) mixing a source of phosphorus with the product of step (a);
- and
- (c) mixing a structure directing agent and a source of silicon with the product of step (b);
- and
- (ii) subjecting the synthesis mixture resulting from step (c) to hydrothermal treatment under conditions effective to produce the silicoaluminophosphate molecular sieve.
4 more elements
Dependencies are inferred from the claim text.