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Method for preparing nano-scale sodalite

A sodalite, nanoscale technology used in nanotechnology, nanotechnology, nanotechnology for materials and surface science

Active Publication Date: 2017-01-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is currently no method for preparing pure nano-scale sodalite using non-water-soluble unconventional silicon raw materials and unconventional aluminum raw materials without any organic additives and structure-directing agents.

Method used

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  • Method for preparing nano-scale sodalite

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0023] (1) Add 36 milliliters of 17.5% (mass)% NaOH aqueous solution to 7.4 grams of solid silica, and stir at 40° C. for 0.5 hour to obtain a silicon-containing alkaline slurry;

[0024] (2) Add 80 milliliters of 27.5% (mass) NaOH aqueous solution to 10.5 grams of pseudo-boehmite, and stir at 80° C. for 1.5 hours to obtain an aluminum-containing alkaline slurry;

[0025] (3) Gradually drop the silicon-containing alkaline slurry into the aluminum-containing alkaline slurry under strong stirring to obtain a silicon-aluminum-containing alkaline mixed slurry;

[0026] (4) Put the alkaline mixed slurry containing silicon and aluminum in a crystallization kettle, crystallize at 60°C for 4 hours, and then age at 90°C for 3 hours;

[0027] (5) The slurry obtained after crystallization and aging was washed with 0.01 M NaOH aqueous solution, then deionized water until neutral, and dried at 70° C. for 3 hours to obtain 12.5 g of product.

[0028] The feeding formula of this embodiment ...

Embodiment 2

[0031] (1) Add 36 milliliters of 24.5% (mass)% NaOH aqueous solution to 7.4 grams of solid silica, and stir at 40° C. for 0.5 hour to obtain a silicon-containing alkaline slurry;

[0032] (2) Add 80 milliliters of 24.5% (mass) NaOH aqueous solution to 5.2 grams of pseudo-boehmite, and stir at 80° C. for 2 hours to obtain an aluminum-containing alkaline slurry;

[0033] (3) Gradually drop the aluminum-containing alkaline slurry into the silicon-containing alkaline slurry under strong stirring to obtain an alkaline mixed slurry containing silicon and aluminum;

[0034] (4) Put the alkaline mixed slurry containing silicon and aluminum in a crystallization kettle, crystallize at 75°C for 3 hours, and then age at 95°C for 2 hours;

[0035] (5) The slurry obtained after crystallization and aging was washed with 0.015 MNaOH aqueous solution, then deionized water until neutral, and dried at 70° C. for 3 hours to obtain 9.4 g of product.

[0036] The feeding formula of this embodiment...

Embodiment 3

[0039] (1) Add 36 milliliters of 31.0% (mass)% NaOH aqueous solution to 7.4 grams of solid silica, and stir at 40° C. for 0.5 hour to obtain a silicon-containing alkaline slurry;

[0040] (2) Add 80 milliliters of 31.0% (mass) NaOH aqueous solution to 3.6 grams of pseudo-boehmite, and stir for 2 hours at 80° C. to obtain an aluminum-containing alkaline slurry;

[0041] (3) Gradually drop the silicon-containing alkaline slurry into the aluminum-containing alkaline slurry under strong stirring to obtain a silicon-aluminum-containing alkaline mixed slurry;

[0042] (4) Put the alkaline mixed slurry containing silicon and aluminum in a crystallization kettle, crystallize at 75°C for 3 hours, and then age at 95°C for 2 hours;

[0043] (5) The slurry obtained after crystallization and aging was washed with 0.015 M NaOH aqueous solution, then deionized water until neutral, and dried at 70° C. for 3 hours to obtain 5.9 g of product.

[0044] The feeding formula of this embodiment is ...

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Abstract

The invention discloses a method for preparing nano-scale sodalite in no presence of any organic additive and structure directing agent, and the method comprises the following steps: 1) stirring a solid silicon source and a solid aluminum source respectively in an alkaline aqueous solution to obtain alkaline slurry containing silicon and alkaline slurry containing aluminum; 2) under stirring, uniformly mixing the alkaline slurry containing silicon and the alkaline slurry containing aluminum to obtain mixed alkaline slurry containing silicon and aluminum; and 3) crystallizing the mixed alkaline slurry containing silicon and aluminum at 40-100 DEG C for 2-10 hours, and then aging at 70-200 DEG C for 1-5 hours to obtain the nano-scale sodalite.

Description

technical field [0001] The invention relates to a method for preparing nano-scale sodalite, which belongs to the field of inorganic nano-material preparation. Background technique [0002] Sodalite (SOD) is one of the most traditional molecular sieves. It consists of body-centered cubic SOD cages (that is, β cages, consisting of 6 four-membered rings and 8 six-membered rings) through its four-membered rings and six-membered rings. ring connected. Sodalite has a three-dimensional Im3m lattice symmetry structure, the diameter of the orifice of the six-membered ring is about 0.28nm, and the maximum diameter of the skeleton is 0.63nm. Due to the small pore diameter of sodalite, only materials such as He, NH 3 , H 2 O and H 2 Small molecules and some ions pass through, making the separation and storage of small-sized molecules have potential application values, such as separation of hydrogen-containing mixtures and hydrogen storage. At the same time, since the volume of the ...

Claims

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Application Information

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IPC IPC(8): C01B33/26B82Y30/00
Inventor 吉媛媛曾小强苗小培
Owner CHINA PETROLEUM & CHEM CORP
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