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Method for preparing zeolite imidazate framework material

A technology of zeolite imidazolate and framework structure, applied in the directions of cobalt organic compounds, zinc organic compounds, etc., can solve the problems of unsuitable industrial production and no advantages, and achieve the effects of simple operation, energy saving and productivity improvement

Active Publication Date: 2016-10-05
李亚丰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Of course, there are other synthetic methods, such as milling and microwave methods, but they have no advantages over the above two methods and are not suitable for large-scale industrial production

Method used

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  • Method for preparing zeolite imidazate framework material
  • Method for preparing zeolite imidazate framework material
  • Method for preparing zeolite imidazate framework material

Examples

Experimental program
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Embodiment 1

[0022] (1) 59.4 mg of zinc nitrate hexahydrate (0.2 mmol) was dissolved in 10 ml of ethanol solution, and the concentration was 0.02 mol / liter;

[0023] (2) 32.8 mg of 2-methylimidazole (0.4 mmol) was dissolved in 10 ml of ethanol solution, and the concentration was 0.04 mol / liter;

[0024] (3) Dissolving 48 mg of sodium hydroxide (1.2 mmol) in 1 ml of water, the concentration is 1.2 mol / liter;

[0025] (4) under normal temperature and pressure stirring, the mol ratio of metal zinc ion, 2-methylimidazole, sodium hydroxide is 1:2:6, by proportioning, the zinc nitrate solution that step (1) is made and step ( 2) Mix the prepared 2-methylimidazole solution, then add the prepared sodium hydroxide solution in step (3), after the addition is completed, continue stirring and reacting for 1 hour at normal temperature and pressure; the resulting mixture is centrifuged, After washing and drying, the zeolite imidazolate skeleton structure material is obtained. Yield 95%. Comparing the...

Embodiment 2

[0027] (1) Dissolve 2970 mg of zinc nitrate hexahydrate (0.01 mole) in 10 milliliters of methanol solution with a concentration of 1 mole / liter;

[0028] (2) 2460 mg of 2-methylimidazole (0.03 moles) was dissolved in 10 milliliters of methanol solution, and the concentration was respectively 3 moles / liter;

[0029] (3) Dissolve 5600 mg of potassium hydroxide (0.1 mole) in 5 milliliters of water at a concentration of 12 moles / liter;

[0030] (4) under normal temperature and pressure stirring, the mol ratio of metallic zinc ion, 2-methylimidazole, potassium hydroxide is 1:3:10, by proportioning, the zinc nitrate solution that step (1) is made and step ( 2) The prepared 2-methylimidazole solution is mixed, then the potassium hydroxide solution prepared in step (3) is added, after the addition is completed, the reaction is continuously stirred at normal temperature and pressure for 2 hours; the resulting mixture is centrifuged, After washing and drying, the zeolite imidazolate sk...

Embodiment 3

[0032] (1) 291 milligrams of cobalt nitrate hexahydrate (1 mmol) are dissolved in 10 milliliters of aqueous solution, and concentration is 0.1 mol / liter;

[0033] (2) 492 mg of 2-methylimidazole (6 mmol) was dissolved in 10 ml of aqueous solution, and the concentration was 0.6 mol / liter;

[0034] (3) The concentration of ammonia water is 15 mol / liter;

[0035] (4) Under stirring at normal temperature and pressure, the mol ratio of metal ion, imidazole compound, inorganic base is 1:6:18, according to proportioning, the cobalt nitrate solution that step (1) is made and step (2) are made The 2-methylimidazole solution was mixed, and then the ammonia solution of step (3) was added. After the addition was completed, the reaction was continuously stirred at normal temperature and pressure for 0.5 hours; the resulting mixture was centrifuged, washed, and dried to obtain zeolite imidazolate Skeleton material. Yield 85%. Comparing the obtained XRD pattern with the simulated pattern by...

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Abstract

The invention provides a method for preparing a zeolite imidazate framework material. The method prepares the zeolite imidazate framework material (ZIFs) from an imidazole compound and zinc and cobalt metal ions at normal temperature and normal pressure with inorganic base or organic amine as a deprotonation agent. The method is fast and highly efficient; and the prepared framework material is high in purity, free of impurities like zinc oxide and high in a specific area, and has a nanometer particle size and yield of 85% or above. The method is short in procedures, easy in product separation, simple to operate and suitable for large-scale industrial production. The prepared zeolite imidazate framework material is extensively applied to fields of isolated storage of gas, sustained release of drugs, membrane sensors and heterocatalysis.

Description

technical field [0001] The invention relates to a method for preparing a zeolite imidazolate skeleton structure material. Background technique [0002] Zeolitic imidazolate framework materials (ZIFs for short) are a class of highly crystalline porous materials similar to sodalite composed of five-membered ring imidazoles and metal ions. Its chemical expression is: M (R-Im) n (M: metal ion, R-Im is the imidazole of substituting group, and n is the valence state of metal ion). When imidazole loses a proton, it can connect with two metal ions to form M-Im-M, whose bond angle is close to 145° of Si-O-Si(Al). Therefore, ZIFs materials, like aluminosilicates, can form so-called zeolite structures, such as SOD (sodalite) and RHO (rhodesite). Because ZIFs materials have adjustable chemical functionality, pore size, ultra-high porosity, large specific surface area, thermal and chemical stability, they have a wide range of applications in gas adsorption and separation, drug sustaine...

Claims

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Application Information

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IPC IPC(8): C07F3/06C07F15/06
Inventor 李亚丰张李梅
Owner 李亚丰
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