Preparation method and evaluation device of modified silicoaluminophosphate molecular sieve
A silicon-alumina-phosphorus molecular sieve and solution technology, which is applied in molecular sieve catalyst, molecular sieve and alkali exchange phosphate, chemical instruments and methods, etc. The effect of industrialization promotion
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Embodiment 1
[0030] A method for preparing a modified silicon-aluminum-phosphorus molecular sieve, comprising the following preparation steps,
[0031] 1) Add desalted water, silicon source, aluminum source, phosphoric acid, amine mixture, and crystal grains into the batching kettle, and then mix evenly; transport the prepared slurry in the batching kettle to the aging kettle through a centrifugal pump for aging reaction for 62 hours ; Add desalted water, silicon source, aluminum source, phosphoric acid, amine mixture, and the mass ratio of crystal grains is: 70:0.05:1:1.7:2.4:0.1; the silicon source is silica sol, and the model of silica sol is JN-30; the aluminum source is pseudo-boehmite; the amine mixture is a mixture of triethylamine and n-butylamine; the crystal grains are raw silicon-aluminum-phosphorus molecular sieve powder after grinding for 48 hours.
[0032] 2) The silicon aluminum phosphorus molecular sieve prepared in step 1) is washed, dried and roasted, and then transported...
Embodiment 2
[0042] A method for preparing a modified silicon-aluminum-phosphorus molecular sieve, comprising the following preparation steps,
[0043] 1) Add desalted water, silicon source, aluminum source, phosphoric acid, amine mixture, and crystal grains into the batching kettle, and then mix evenly; transport the prepared slurry in the batching kettle to the aging kettle through a centrifugal pump for 80 hours of aging reaction Add desalted water, silicon source, aluminum source, phosphoric acid, amine mixture, and the mass ratio of crystal grains is: 70:0.8:1:1.1:3.4:0.2; the silicon source is silica sol, and the model of silica sol is JN-40; the aluminum source is pseudo-boehmite; the amine mixture is triethylamine; the grains are the original powder of silicon-aluminum-phosphorus molecular sieve after grinding for 36 hours.
[0044] 2) The silicon aluminum phosphorus molecular sieve prepared in step 1) is washed, dried and roasted, and then transported to a modification kettle fill...
Embodiment 3
[0054] A method for preparing a modified silicon-aluminum-phosphorus molecular sieve, comprising the following preparation steps,
[0055] 1) Add desalted water, silicon source, aluminum source, phosphoric acid, amine mixture, and crystal grains into the batching kettle, and then mix evenly; transport the prepared slurry in the batching kettle to the aging kettle through a centrifugal pump for aging reaction for 104 hours ; Add desalted water, silicon source, aluminum source, phosphoric acid, amine mixture, and the mass ratio of crystal grains is: 100:0.5:1:1.1:3.2:0.6; the silicon source is silica sol, and the model of silica sol is SW-30; the aluminum source is pseudo-boehmite; the amine mixture is a mixture of triethylamine and diethylamine; the crystal grains are raw silicon-aluminum-phosphorous molecular sieve powder after grinding for 64 hours.
[0056] 2) washing, drying and roasting the silicon-aluminum-phosphorus molecular sieve prepared in step 1), and then transport...
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