Method for fast synthesizing ZSM-5 molecular sieves
A ZSM-5, molecular sieve technology, applied in the direction of crystalline aluminosilicate zeolite, borane silicone crystalline aluminosilicate zeolite, etc., can solve the problems of increasing the cost of molecular sieve, consumption of organic template agents, environmental pollution, etc., and achieve crystallization The effect of good degree, low cost and low pollution
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Example Embodiment
[0030] Example 1: The method for rapidly synthesizing ZSM-5 molecular sieve adopts the following process steps.
[0031] (1) First, 0.61g aluminum isopropoxide, 16.09g deionized water and 0.20g NaOH are mixed to form solution A, then 12.48g ethyl orthosilicate and 9.75g tetrapropylammonium hydroxide solution (25%wt Solution) mixed to form solution B (where SiO 2 / Al 2 O 3 , OH - / SiO 2 , R / SiO 2 And H 2 O / SiO 2 The molar ratio of the sol-gel is 40, 0.28, 0.2 and 21.7), the solution B is dropped into the solution A under vigorous stirring to obtain a uniformly mixed sol-gel, and the mixture is stirred and aged for 4h at room temperature.
[0032] (2) Take out the aged sol-gel and put it in an oven at 80°C for 2.5 hours and grind it into a powdery dry glue powder.
[0033] (3) Put the dry glue powder into a stainless steel crystallization kettle with PTFE lining, add water, and crystallize at 150℃ for 24h.
[0034] (4) The precipitate (crystallized product) is washed to neutrality by ce...
Example Embodiment
[0035] Example 2: The method for rapidly synthesizing ZSM-5 molecular sieve adopts the following process steps.
[0036] (1) First mix 1.50g aluminum nitrate, 34.94g deionized water and 1.20g NaOH to form solution A, then mix 12.48g ethyl orthosilicate, 10g deionized water and 4.88g tetrapropylammonium hydroxide solution (25 %wt aqueous solution) mixed to form solution B (where SiO 2 / Al 2 O 3 , OH - / SiO 2 , R / SiO 2 And H 2 O / SiO 2 The molar ratio of the solution B is 30, 0.6, 0.1 and 45), the solution B is dropped into the solution A under vigorous stirring to obtain a uniformly mixed sol-gel, and the mixture is stirred and aged for 4 hours at room temperature.
[0037] (2) Take out the aged sol-gel and put it in an oven at 70°C for 3 hours and grind it into a powdery dry glue powder.
[0038] (3) Put the dry glue powder into a stainless steel crystallization kettle with PTFE lining, add water, and crystallize at 150℃ for 24h.
[0039] (4) The precipitate (crystallized product) is w...
Example Embodiment
[0040] Example 3: The method for rapidly synthesizing ZSM-5 molecular sieve adopts the following process steps.
[0041] (1) First mix 0.82g aluminum isopropoxide, 17.78g deionized water and 0.80g NaOH to form solution A, then mix 24.96g ethyl orthosilicate and 19.50g tetrapropylammonium hydroxide solution (25%wt Aqueous solution) mixed to form solution B (where SiO 2 / Al 2 O 3 , OH - / SiO 2 , R / SiO 2 And H 2 O / SiO 2 The molar ratio of the solution B is 60, 0.37, 0.2 and 15). Under vigorous stirring, drop solution B into solution A to obtain a uniformly mixed sol-gel, and stir and age at room temperature for 4 hours.
[0042] (2) Take out the aged sol-gel and put it in an oven at 80°C for 2h, and grind it into a powdery dry glue powder.
[0043] (3) Put the dry glue powder into a stainless steel crystallization kettle with PTFE lining, add water, and crystallize at 160℃ for 20h.
[0044] (4) The precipitate (crystallized product) is washed to neutrality by centrifugation and dried at ...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap