Regeneration method of titanium-silicon molecular sieve
A titanium-silicon molecular sieve and regeneration solution technology, which is applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve environmental protection and economic constraints, high material consumption and energy consumption, and cumbersome and complicated operation processes. Achieve the effect of saving raw materials, increasing yield and reducing pollution
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Embodiment 1
[0032] This example illustrates the method for regenerating titanium-silicon molecular sieves provided by the present invention.
[0033] Mix the measured amount of amorphous silica gel with tetrapropylammonium hydroxide, add distilled water, stir at room temperature for 1.5h after mixing, add butyl titanate and stir for 0.5h, then stir at 75°C for 3h to obtain a regeneration solution. Its composition is silicon (mol): titanium (mol): organic base (mol): water (mol) = 0.05: 0.001: 0.15: 20 (where silicon and titanium are SiO 2 and TiO 2 In terms of organic bases in NH 3 meter), the obtained regeneration solution was mixed with a certain amount of filtered mother liquor (from Comparative Example 1, the same below), wherein the mass ratio of the regeneration solution to the filtered mother liquor was 100:15. Take 12g of inactivated TS-1 molecular sieve B-1 and mix with 60g of the above mixture, and then react in a sealed autoclave at 175°C for 52h. The obtained product was fi...
Embodiment 2
[0035] This example illustrates the method for regenerating titanium-silicon molecular sieves provided by the present invention.
[0036] Mix the measured ethyl silicate, ethyl titanate and tetraethylammonium hydroxide, add distilled water, stir at room temperature for 1.0h after mixing, and then stir at 65°C for 3h to obtain a regeneration solution, which consists of silicon (mol ): titanium (mol): organic base (mol): water (mol) = 0.01: 0.0005: 0.2: 35 (where silicon and titanium are SiO 2 and TiO 2 In terms of organic bases in NH 3 Calculate), mix the obtained regeneration solution with a certain amount of filtered mother liquor, wherein the mass ratio of the regeneration solution to the filtered mother liquor is 100:5. Take 12g of inactivated TS-1 molecular sieve B-1 and mix with 80g of the above mixture, and then react in a sealed autoclave at 160°C for 72h. The obtained product was filtered, washed, dried at 135°C for 120min, and then calcined at 500°C for 6h to obtai...
Embodiment 3
[0038] This example illustrates the method for regenerating titanium-silicon molecular sieves provided by the present invention.
[0039] Mix measured ethyl silicate and ethyl titanate with tetraethylammonium hydroxide and ethanolamine, add distilled water, stir at room temperature for 1.0h after mixing, and then stir at 75°C for 3h to obtain a regeneration solution, which consists of silicon (mol): titanium (mol): tetraethylammonium hydroxide (mol): ethanolamine (mol): water (mol) = 0.1: 0.01: 0.08: 0.05: 20 (where silicon and titanium are SiO 2 and TiO 2 In terms of organic bases in NH 3 The obtained regeneration solution is mixed with a certain amount of filtered mother liquor, wherein the mass ratio of the regeneration solution to the filtered mother liquor is 100:150. Take 12g of inactivated TS-1 molecular sieve B-1 and mix with 100g of the above mixture, and then react in a sealed autoclave at 140°C for 12h. The resulting product was filtered, washed, dried at 100°C f...
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