A kind of silicate-1 molecular sieve containing trace metal ions and preparation method thereof
A metal ion, trace metal technology, applied in non-metallic elements, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of Silicalite-1 molecular sieve synthesis and other problems that have not been seen, achieve high crystallinity, improve economy, and prolong catalyst. effect of life
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0035] The second aspect of the present invention provides a method for preparing a Silicate-1 molecular sieve containing a trace amount of metal ions, the method comprising: a. mixing a silicon source, a metal ion source, an organic template and water to obtain a colloidal mixture, wherein In terms of molar ratio, SiO in the colloidal mixture 2 : organic templating agent: H 2 O=1: (0.05-0.50): (5-100), preferably SiO 2 : organic templating agent: H 2 O=1: (0.15-0.25): (10-50); the mass ratio of silicon oxide to metal ions is (5000-200000): 1, preferably, the mass ratio of silicon oxide to metal ions is (10000-100000) : 1; b, the colloidal mixture obtained in step a is hydrothermally crystallized.
[0036] According to the second aspect of the present invention, the silicon source in step a can be a conventional choice in the art, for example, it can be at least one selected from silica gel, silica sol and organic silicate; preferably the general formula is ( OR 1 ) 4 Si...
Embodiment 1
[0048]With 208 grams of ethyl orthosilicate, 180 grams of 22.5% by weight of tetrapropylammonium hydroxide (abbreviated as TPAOH), 0.0281 grams of Fe (NO 3 ) 3 9H 2 O and 220 grams of water were mixed and stirred at room temperature for 3 hours to form a colloidal mixture with a molar ratio of SiO 2 :TPAOH:H 2 O=1:0.2:20, SiO 2 with Fe 3+ The mass ratio of the above mixture is 15347:1, and the above mixture is moved into a 1000 ml stainless steel reactor lined with polytetrafluoroethylene, crystallized at 100°C for 3 days, washed, filtered, dried at 120°C for 24 hours, and roasted at 550°C for 6 hours. The Silicate-1 molecular sieve prepared in this example was obtained.
[0049] The iron ion content of the Silicate-1 molecular sieve product prepared by this embodiment is 64ppm, and the BET specific surface area is 446 meters 2 / g, the outer specific surface is 61 meters 2 / gram, the X-ray diffraction pattern of product is as figure 1 As shown, the transmission electro...
Embodiment 2
[0051] With 208 grams of ethyl orthosilicate, 180 grams of 22.5% by weight of tetrapropylammonium hydroxide (abbreviated as TPAOH), 0.118 grams of Al (NO 3 ) 3 9H 2 O and 220 grams of water were mixed and stirred at room temperature for 5 hours to form a colloidal mixture with a molar ratio of SiO 2 :TPAOH:H 2 O=1:0.2:20, SiO 2 with Al 3+ The mass ratio of the above mixture is 7067:1. The above mixture is transferred into a 1000 ml stainless steel reactor lined with polytetrafluoroethylene, crystallized at 100°C for 3 days, washed, filtered, dried at 120°C for 24 hours, and roasted at 550°C for 6 hours. The Silicate-1 molecular sieve prepared in this example was obtained.
[0052] The aluminum ion content of the Silicate-1 molecular sieve product prepared in this embodiment is 140ppm, and the BET specific surface area is 433 meters 2 / g, the outer specific surface is 51 meters 2 / gram, the X-ray diffraction pattern of product and figure 1 Similarly, TEM photographs wit...
PUM
| Property | Measurement | Unit |
|---|---|---|
| specific surface area | aaaaa | aaaaa |
| particle size | aaaaa | aaaaa |
| particle diameter | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More