Composite molecular sieve catalyst for MTP (methanol to propylene) as well as application thereof
A technology for preparing composite molecular sieve and methanol is applied in the field of composite structure bi-molecular sieve catalyst, which can solve the problems of low propylene yield and high gasoline yield
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Embodiment l
[0035] Take 24.4g of silica sol, 7.8g of sodium aluminum metaphosphate, 7.6g of ammonium hydrogen phosphate, and 150.2g of distilled water, mix them evenly, age at room temperature for 24 hours; evaporate at 70°C for 24 hours to make a concentrated gel mixture. According to the molar ratio of SiO 2 :A1 2 0 3 :P 2 0 5 :Morpholine:H 2 0=0.6:1:1:1:60 Add morphineline and water, put it into a pressure-resistant reaction kettle lined with polytetrafluoroethylene, slowly raise the temperature to 130°C for static crystallization for 12 hours; cool down to prepare a product containing SAPO-34 microcrystalline molecular sieve semi-finished slurry.
[0036] SiO 2 :A1 2 0 3 :NaO 2 :TPAOH:H 2 0=30:1:3.25:5:20, formulated to contain 0.2 moles of SiO 2 The gel mixture is then added to the semi-finished slurry containing SAPO-34 microcrystalline molecular sieve prepared above. Their mixture was stirred for 30 minutes and then transferred to a crystallization kettle. Raise the te...
Embodiment 2
[0039] Take 9.0g ethyl orthosilicate, 5.8g aluminum nitrate, 6.6g phosphoric acid, 170.2g distilled water, mix well, age at room temperature for 1 hour; evaporate at 100°C for 4 hours to make a concentrated gel mixture. According to the molar ratio of SiO 2 :A1 2 0 3 :P 2 0 5 :C6H15N:H 2 0=0.6:1:1:1:60 Add triethylamine and water, put it into a pressure-resistant reactor lined with polytetrafluoroethylene, slowly raise the temperature to 160°C for static crystallization for 4 hours; cool down to prepare Semi-finished slurry containing SAPO-34 microcrystalline molecular sieve.
[0040] Silicic acid, aluminum sulfate, sodium hydroxide, tetrapropylammonium hydroxide, and deionized water are prepared according to the molar ratio: SiO 2 :A1 2 0 3 :NaO 2 :TPAOH:H 2 0=30:1:3.25:5:20, formulated to contain 0.2 moles of SiO 2 The gel mixture is then added to the semi-finished slurry containing SAPO-34 microcrystalline molecular sieve prepared above. Their mixture was stirr...
Embodiment 3
[0043] Take 6.0g of silicon dioxide, 5.8g of aluminum nitrate, 7.6g of ammonium hydrogen phosphate, and 192.6g of distilled water, mix them evenly, age at room temperature for 6 hours; evaporate at a temperature of 85°C for 6 hours to make a concentrated gel mixture. According to the molar ratio of SiO 2 :A1 2 0 3 :P 2 0 5 : Organic template agent: H 2 0=0.6:1:1:1:60 Add tetraethylammonium hydroxide and water, put it into a pressure-resistant reactor lined with polytetrafluoroethylene, slowly raise the temperature to 145°C for static crystallization for 8 hours; cool down , prepared into semi-finished slurry containing SAPO-34 microcrystalline molecular sieve.
[0044] Tetraethyl orthosilicate, aluminum sulfate, sodium hydroxide, tetrapropylammonium hydroxide, and deionized water are prepared according to the molar ratio: SiO 2 :A1 2 0 3 :NaO 2 :TPAOH:H 2 0=30:1:3.25:5:20, formulated to contain 0.2 moles of SiO 2 The gel mixture is then all added to the semi-finishe...
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