Hydrothermal regenerating method of titanium silicon molecular sieve
A titanium-silicon molecular sieve, hydrothermal technology, applied in molecular sieve catalysts, chemical instruments and methods, catalyst regeneration/reactivation, etc., can solve the problems of high material consumption and energy consumption, environmental protection and economic limitations, complicated and complicated operation process, etc. To achieve the effect of improving product yield
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Embodiment 1
[0033] Mix measured amorphous silica gel with tetrapropylammonium hydroxide, add distilled water, stir at room temperature for 1.5 hours after mixing, then add butyl titanate and stir for 0.5 hours, then stir at 75°C for 3 hours to obtain a regeneration solution , its composition is silicon (mol): titanium (mol): organic base (mol): water (mol) = 0.05: 0.001: 0.15: 20 (wherein silicon and titanium are SiO 2 and TiO 2 count). Take 12 grams of deactivated TS-1 molecular sieve B-1 and mix with 60 grams of regeneration solution, and then react in a sealed autoclave at 175° C. for 52 hours.
[0034] The resulting product was filtered, washed, dried at 180°C for 120 minutes, and then calcined at 650°C for 2 hours to obtain hydrothermally regenerated molecular sieve A.
Embodiment 2
[0036] Mix measured amounts of ethyl silicate, ethyl titanate and tetraethylammonium hydroxide, add distilled water, stir at room temperature for 1.0 hour after mixing, and then stir at 65°C for 3 hours to obtain a regeneration solution, which consists of silicon ( mole): titanium (mole): organic base (mole): water (mole) = 0.01: 0.0005: 0.2: 35 (where silicon and titanium are SiO 2 and TiO 2 count). Take 12 grams of deactivated TS-1 molecular sieve B-2 regenerated by roasting and mix with 65 grams of regeneration solution, and then react in a sealed autoclave at 160° C. for 72 hours.
[0037] The resulting product was filtered, washed, dried at 135°C for 120 minutes, and then calcined at 500°C for 6 hours to obtain hydrothermally regenerated molecular sieve B.
Embodiment 3
[0039] Mix measured ethyl silicate, ethyl titanate, tetraethylammonium hydroxide, and ethanolamine, add distilled water, stir at room temperature for 1.0 hour after mixing, and then stir at 75°C for 3 hours to obtain a regeneration solution, which consists of Silicon (mol): titanium (mol): tetraethylammonium hydroxide (mol): ethanolamine (mol): water (mol) = 0.1 (mol): 0.01 (mol): 0.08 (mol): 0.05: 20 (mol ). Take 10 grams of deactivated molecular sieve S-1 and mix them evenly with 55 grams of regeneration solution, and then react in a sealed autoclave at 140°C for 72 hours.
[0040] The resulting product was filtered, washed, dried at 100°C for 300 minutes, and then calcined at 580°C for 4 hours to obtain regenerated TS-1 molecular sieve C.
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