Treatment method of deactivated titanium-silicon molecular sieve
A titanium-silicon molecular sieve and processing method technology, applied in molecular sieve catalysts, chemical instruments and methods, chemical/physical processes, etc., to achieve the effects of saving raw materials, reducing material consumption, and restoring relative crystallinity
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Embodiment 1
[0041] Mix measured tetrapropyl silicate, tetraethyl titanate and tetramethylammonium hydroxide, add distilled water, mix well, stir at room temperature for 1.0h for hydrolysis, and then stir at 75°C for 3h to obtain reclaimed rubber. Its molar composition is silicon: titanium: organic base: water = 1: 0.02: 0.75: 20 (silicon and titanium are represented by SiO 2 and TiO 2 In terms of organic bases in NH 3 , the same below), then mixed the reclaimed rubber and the filtered mother liquor according to the mass ratio of 100:10 to obtain a mixed solution; then mixed the inactivated molecular sieve sample S-1 with the above mixed solution according to the mass ratio of 100:40, Put it into a 50mL polytetrafluoroethylene liner and place it in a 100mL polytetrafluoroethylene liner, and react in a sealed autoclave at 145°C for 60h. The obtained molecular sieve regenerated by steam treatment was dried at 180° C. for 120 minutes, and then calcined at 580° C. for 5 hours to obtain the r...
Embodiment 2
[0043] Mix the metered Z-type silica gel with tetrapropylammonium hydroxide, add distilled water, mix well, stir at room temperature for 1.0h, then add butyl titanate and stir for 0.5h, then stir at 65°C for 6h to obtain reclaimed rubber. Its molar composition is silicon: titanium: organic base: water = 1: 0.025: 0.8: 20, then the reclaimed rubber and the filtered mother liquor are mixed according to the mass ratio of 100: 50 to obtain a mixed solution; then the roasted molecular sieve sample B -1 Mix with the above mixed solution at a mass ratio of 100:50, put it into a 50mL polytetrafluoroethylene liner and place it in a 100mL polytetrafluoroethylene liner, and then react in a sealed autoclave at 175°C for 48h . The obtained product was dried at 135° C. for 180 minutes, and then calcined at 500° C. for 6 hours to obtain regenerated TS-1 molecular sieve B.
Embodiment 3
[0045] Mix measured tetraethyl orthosilicate, tetraethyl titanate, tetraethylammonium hydroxide and n-butylamine, add distilled water, mix well, stir at room temperature for 1.0h for hydrolysis, and then stir at 70°C for 4h, Obtain the reclaimed rubber, its molar composition is silicon: titanium:: tetraethylammonium hydroxide: n-butylamine: water=1: 0.02: 0.35: 0.3: 25, then the reclaimed rubber and the filtered mother liquor are 100: 40 according to the mass ratio The proportion of mixing to get a mixed solution; then the inactivated molecular sieve sample S-2 and the above mixed solution were mixed according to the mass ratio of 100:20, it was packed into 50mL polytetrafluoroethylene liner and placed in 100mL polytetrafluoroethylene Lined with ethylene, and then reacted at 160°C for 65h in a sealed autoclave. The obtained product was dried at 100° C. for 300 minutes, and then calcined at 650° C. for 4 hours to obtain regenerated TS-1 molecular sieve C.
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