Method for synthesizing silicoaluminophosphate-34 molecular sieves

A method for synthesizing silicoaluminophosphate-34 (SAPO-34) molecular sieves, comprising:

• forming a first slurry comprising a first source of phosphorus, a first source of aluminium, a first source of silicon, and at least one first organic structure directing agent;
• aging the first slurry to form a first aged slurry;
• forming a second slurry comprising a second source of phosphorus, a second source of aluminium, a second source of silicon, and at least one second organic structure directing agent;
• aging the second slurry to form a second aged slurry;
• forming a mixture of aged slurries by combining the first aged slurry and the second aged slurry;
• and
• inducing crystallization of silicoaluminophosphate molecular sieves comprising the SAPO-34 molecular sieves from the mixture of aged slurries;
• wherein at least one first organic structure directing agent in the first slurry is different from at least one second organic structure directing agent in the second slurry;
• the first source of phosphorus may be the same or different from the second source of phosphorus;
• the first source of aluminium may be the same or different from the second source of aluminium;
• and
• the first source of silicon may be the same or different from the second source of silicon.