Synthetic process of SAPO-11 Molecular sieve
A technique for the synthesis of SAPO-11, which is applied in the field of synthesis of SAPO-11 molecular sieves, can solve the problems of difficult operation, complex process, and high synthesis cost, and achieve the effects of safe and convenient operation, strong process economy, and low synthesis cost
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[0021] Example 1.
[0022] Put 80g of 1-ethyl-3-methylimidazole bromide into a three-necked flask, raise the temperature to 100°C, add 3.2g of phosphoric acid with a concentration of 85% by weight, and stir well, then add 2.1g of aluminum isopropoxide and stir well. Then add 0.5g of ethyl orthosilicate, stir evenly, then add 0.3g of 40wt% hydrofluoric acid, stir evenly, increase the temperature to 150℃, keep it for 68 hours, then cool the reaction mixture to room temperature, add 150ml of water, and stir. After uniformity, the reaction mixture was filtered to obtain a brown powder. The powder was washed with 100 ml of acetone to obtain a white powder. According to XRD test, the white powder was SAPO-11 molecular sieve and contained a small amount of unknown impurity crystals. In a rotary evaporator, the water in the washed filtrate and the solvent for washing the molecular sieve are evaporated, and the ionic liquid is recovered.
Example Embodiment
[0023] Example 2.
[0024] Add 200g of 1-ethyl-3-methylimidazole bromide into a three-necked flask, raise the temperature to 80°C, add 3.2g of phosphoric acid with a concentration of 85% by weight, and stir well, then add 2.1g of aluminum isopropoxide and stir well. Then add 0.5g of ethyl orthosilicate, stir evenly, then add 0.3g of 40wt% hydrofluoric acid, stir evenly, increase the temperature to 150℃, keep it for 68 hours, then cool the reaction mixture to room temperature, add 150ml of water, and stir. After uniformity, the reaction mixture was filtered to obtain a brown powder. The powder was washed with 100 ml of acetone to obtain a white powder. According to XRD test, the white powder was SAPO-11 molecular sieve and contained a small amount of unknown impurity crystals.
Example Embodiment
[0025] Example 3.
[0026] Put 40g of 1-ethyl-3-methylimidazole bromide into a three-necked flask, raise the temperature to 150°C, add 3.2g of phosphoric acid with a concentration of 85% by weight, and stir well, then add 2.1g of aluminum isopropoxide and stir well. Then add 0.5g of ethyl orthosilicate, stir evenly, then add 0.3g of 40wt% hydrofluoric acid, stir evenly, increase the temperature to 150℃, keep it for 68 hours, then cool the reaction mixture to room temperature, add 150ml of water, and stir. After uniformity, the reaction mixture was filtered to obtain a brown powder. The powder was washed with 100 ml of acetone to obtain a white powder. According to XRD test, the white powder was SAPO-11 molecular sieve and contained a small amount of unknown impurity crystals.
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