SAPO-11 molecular sieve, manufacturing method thereof, and application thereof in hydrocarbon isomerization
A technology of SAPO-11 and molecular sieve, which is applied to molecular sieve catalysts, including molecular sieve catalysts, molecular sieves and base-exchanged phosphates, can solve problems such as environmental impact and increased production costs, and achieve high double-branched isomerization selectivity and low Cracking selectivity, effect of increasing gasoline octane number
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Embodiment 1
[0050] Dissolve 6.25g of aluminum isopropoxide in 51.70g of ethylene glycol, and stir at 25°C for 1 hour to obtain solution A;
[0051] 7.62g di-n-propylamine and 6.22g H 3 PO 4 Add to the above solution A, and stir at 25°C for 2 hours to obtain solution B;
[0052] Add 1.28g of ethyl orthosilicate to the above solution B, and stir at 25°C for 1.5h to obtain solution C;
[0053] Transfer the above solution C to 100 ml supercritical CO 2 The reaction kettle was sealed, and CO was introduced into the reaction kettle at 25°C. 2 , so that the pressure in the reactor reaches 62.07bar;
[0054] Supercritical CO 2 The temperature of the reaction kettle was raised to 200°C, the self-generated pressure reached 124.14bar, and the constant temperature crystallized for 144h;
[0055] Supercritical CO 2 Cool the reaction kettle to 25°C, centrifuge the product, dry at 120°C for 12 hours, and roast in an air atmosphere at 600°C for 6 hours to obtain SAPO-11 molecular sieve powder, whi...
Embodiment 2
[0066] Dissolve 7.50g of aluminum isopropoxide in 51.70g of ethylene glycol, and stir at 25°C for 1 hour to obtain solution A;
[0067] 7.32g di-n-propylamine and 5.98g H 3 PO 4 Add to the above solution A, and stir at 25°C for 2 hours to obtain solution B;
[0068] Add 1.22g of tetraethyl orthosilicate to the above solution B, and stir at 25°C for 1.5h to obtain solution C;
[0069] Transfer the above solution C to a tank with 100 ml supercritical CO 2 The reaction kettle was sealed, and CO was introduced into the reaction kettle at 25°C. 2 , so that the pressure in the reactor reaches 50.00bar;
[0070] Supercritical CO 2 The temperature of the reaction kettle was raised to 200°C, the self-generated pressure reached 90.25bar, and the constant temperature crystallized for 144h;
[0071] Supercritical CO 2 Cool the reaction kettle to 25°C, centrifuge the product, dry at 120°C for 12 hours, and roast in an air atmosphere at 600°C for 6 hours to obtain SAPO-11 molecular s...
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