Preparation method of aluminum-containing metal organic framework material and material prepared by preparation method

Abstract

The invention discloses a preparation method of an aluminum-containing metal organic framework material and the material prepared by the preparation method. The material is used for separating CH4 / N2.The preparation method comprises the following steps: (1) uniformly mixing aluminum chloride hexahydrate, trans-cyclohexane, N,N-dimethylformamide and distilled water by stirring, placing the mixturein a round-bottom beaker; (2) placing the round-bottom beaker at a certain temperature, and carrying out stirring to obtain a certain amount of precipitates; and step (3), soaking and washing the product obtained in the step (3); and (4) placing the product obtained in the step (3) into a vacuum drying oven for drying. The preparation method is simple in operation, saves energy and is friendly tothe environment. Compared with a previous synthesis method, the preparation method has a shorter synthesis time, a faster speed and a higher yield. Meanwhile, relatively high methane-nitrogen adsorption separation selectivity and methane adsorption capacity are achieved. In addition, the material also has relatively high acid resistance, alkali resistance, water resistance and heat stability.

Description

technical field [0001] The invention relates to the field of nanoporous materials, in particular to a method for preparing an aluminum-containing metal-organic framework material and the prepared material. Background technique [0002] In today's world, due to the continuous consumption of fossil fuels, energy and the environment are facing enormous challenges, and the demand for clean energy is growing rapidly. As a clean and economical alternative energy, natural gas has received more and more attention. The main component of natural gas is methane but it is mixed with a small amount of nitrogen. Therefore, the efficient separation of methane and nitrogen has become an urgent need in today's society. [0003] As a new type of porous material, metal-organic frameworks are formed by the coordination of inorganic metal clusters and organic ligands, and have been widely explored due to their high specific surface area, porosity and adjustable pore environment. And research,...

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Problems solved by technology

However, the current method of synthesizing metal-organic frameworks is generally solvothermal method. This method has certain disadvantages. Since this synthesis method is carried out in a closed system of autoclave and oven equipment, it is impossible to observe the progress of the reaction intuitively. The second is that the reaction takes a long time and the reaction temperature is too high to cause the solvent to volatilize to form a higher pressure, so there will be certain safety hazards, and the yield is relatively low.

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