The preparation method of stf zeolite molecular sieve
A zeolite molecular sieve and molecular sieve technology, applied in the direction of crystalline aluminosilicate zeolite, etc., can solve the problems of increasing the preparation cost of STF molecular sieve, complex organic template structure, limited availability, etc., to facilitate promotion, enhance structure orientation, and operability strong effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0024] 41.6g tetraethyl orthosilicate (TEOS) was slowly added dropwise into 76.8g 1,1,2,6-TMPOH aqueous solution (20wt%), stirred at room temperature, and after the hydrolysis was complete, the container was opened and stirred overnight to volatilize ethanol and Part of the water, add 7.5g hydrofluoric acid (40wt%), continue to volatilize part of the water after stirring, until the reaction mixture reaches the following molar composition:
[0025] 0.5(1,1,2,6-TMPOH):SiO 2 :0.75HF:7.5H 2 o
[0026] The above mixture was put into a crystallization kettle with a polytetrafluoroethylene liner, and placed in an oven at 150°C for crystallization for 168 hours. The solid obtained after the reaction is filtered, washed, dried and calcined is STF molecular sieve. The XRD pattern of the sample is as figure 1 As shown, the scanning electron microscope photo is shown as figure 2 shown.
Embodiment 2
[0028] Slowly add 34.7g tetraethyl orthosilicate (TEOS) dropwise into 115g 1,1,2,6-TMPOH aqueous solution (20wt%), stir at room temperature, after the hydrolysis is complete, open the container and stir overnight to volatilize ethanol and some Water, add 30g ammonium fluoride solution (37wt%), continue to volatilize part of water after stirring, until reaction mixture reaches following molar composition:
[0029] 0.9(1,1,2,6-TMPOH):SiO 2 :1.8NH 4 F:18H 2 o
[0030] The above mixture was put into a crystallization kettle with a polytetrafluoroethylene liner, and placed in an oven at 160°C for crystallization for 144 hours. The solid obtained after the reaction is filtered, washed, dried and calcined is STF molecular sieve.
Embodiment 3
[0032] Slowly add 27.7g tetraethyl orthosilicate (TEOS) dropwise into 154g 1,1,2,6-TMPOH aqueous solution (20wt%), stir at room temperature, after the hydrolysis is complete, stir the container open overnight to volatilize ethanol and some Water, add 10g hydrofluoric acid (40wt%) and 13.34g ammonium fluoride solution (37wt%), continue to volatilize part of water after stirring, until the reaction mixture reaches the following molar composition:
[0033] 1.5(1,1,2,6-TMPOH):SiO 2 :1.5HF:1NH 4 F:30H 2 o
[0034] The above mixture was put into a crystallization kettle with a polytetrafluoroethylene liner, and placed in an oven at 175°C for crystallization for 96 hours. The solid obtained after the reaction is filtered, washed, dried and calcined is STF molecular sieve.
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More