Preparation of LTA structure aluminophosphate molecular sieve membrane supported by porous alumina carrier
A technology of aluminum phosphate molecular sieve and porous alumina, which is applied in the direction of molecular sieve characteristic aluminum phosphate, molecular sieve and alkali-exchanged phosphate, phosphorus compound, etc., which can solve problems such as environmental pollution, hidden safety hazards, heavy and complicated coating process, and achieve environmental friendliness , easy operation, good gas separation and permeability effects
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Embodiment 1
[0030] Add 65.8 grams of 1-butyl-3-methylimidazolium bromide ionic liquid into a 100 ml beaker, heat up to 100°C, add 0.10 grams of hydrofluoric acid with a mass concentration of 40%, stir for 2 hours until uniform, and add Dropping 0.94 gram of mass concentration is 85% phosphoric acid, then evenly adding 0.75 gram of mass concentration is 25% tetramethylammonium hydroxide, P 2 o 5 :F - : The molar ratio of organic amine: ionic liquid is 2: 1: 1: 150, continue to stir for 10 minutes, then pour the reaction solution into the reactor in which the δ-circular flake-shaped alumina carrier has been placed in advance, and pay attention to the fact that the carrier must be completely Immersed in the reaction solution, the amount ratio of the support body to the precursor reaction solution is 0.5 (cm 2 ·ml -1surface area of the support), the reactor was heated to 160°C and kept for 12 hours, then the reactor was lowered to room temperature, the support was taken out, ultrasonical...
Embodiment 2
[0033] Add 65.8 grams of 1-butyl-3-methylimidazolium bromide ionic liquid into a 100 ml beaker, heat up to 120°C, add 0.10 grams of hydrofluoric acid with a mass concentration of 40%, stir for 2 hours until uniform, and add Adding 1.88 gram of mass concentration dropwise is 85% phosphoric acid, then evenly adding 0.75 gram of mass concentration is 25% tetramethylammonium hydroxide, P 2 o 5 :F - : The molar ratio of organic amine: ionic liquid is 4: 1: 1: 150, continue to stir for 10 minutes, then pour the reaction solution into the reactor in which the θ-circular sheet-shaped alumina carrier has been placed in advance, and the carrier must be completely Immersed in the reaction solution, the amount ratio of the support body to the precursor reaction solution is 0.6 (cm 2 ·ml -1 surface area of the support), the temperature of the reactor was raised to 170°C and kept for 12 hours, then the reactor was lowered to room temperature, the carrier was taken out, ultrasonically w...
Embodiment 3
[0035] Add 65.8 grams of 1-butyl-3-methylimidazolium bromide ionic liquid into a 100 ml beaker, heat up to 100°C, add 0.20 grams of hydrofluoric acid with a mass concentration of 40%, stir for 2 hours until uniform, and add Adding 1.88 gram of mass concentration dropwise is 85% phosphoric acid, then evenly adding 0.75 gram of mass concentration is 25% tetramethylammonium hydroxide, P 2 o 5 :F - : The molar ratio of organic amine: ionic liquid is 4: 2: 1: 150, continue to stir for 10 minutes, then pour the reaction solution into the reactor in which the δ-circular flake alumina carrier has been placed in advance, pay attention to the fact that the carrier must be completely Immersed in the reaction solution, the amount ratio of the support body to the precursor reaction solution is 0.4 (cm 2 ·ml -1 surface area of the support), the reactor was heated to 150°C and kept for 24 hours, then the reactor was lowered to room temperature, the support was taken out, ultrasonically ...
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