Ethylene and ethane adsorbing separation method based on ultramicroporous metal organic framework material

Abstract

The invention discloses an ethylene and ethane adsorbing separation method based on an ultramicroporous metal organic framework material. The ethylene and ethane adsorbing separation method comprisesthe following steps: contacting mixed gas of ethylene and ethane with the ultramicroporous metal organic framework material to adsorb ethylene in the mixed gas so as to separate the ethylene from theethane, wherein the ultramicroporous metal organic framework material adopts a chemical formula of [M3L3A] infinite, in which M is a metal cation, L is an organic ligand and A is an oxygen-containinginorganic anion; the organic ligand is 1,2,4-triazole and a derivative thereof; the metal cation is one of Cu<2+>, Zn<2+>, Co<2+> and Ni<2+>; the oxygen-containing inorganic anion is PO4<3-> or VO4<3->. When the mixed gas of the ethylene and the ethane contacts the ultramicroporous metal organic framework material, significant differences in the diffusion rates and the adsorption capacities of thetwo in a material pore are caused by differences in molecular sizes and hydrogen bond acidity of the ethylene / the ethane, so that selective adsorption of the ethylene is achieved, and high-purity ethylene gas and high-purity ethane gas are obtained.

Description

technical field

[0001] The invention belongs to the technical field of chemical industry separation, and in particular relates to a method for using an ultramicroporous metal organic framework material for ethylene / ethane separation. Background technique

[0002] As one of the most produced chemicals in the world, ethylene is the core of the petrochemical industry and an important symbol to measure a country's petrochemical development level. The downstream products of ethylene mainly include polyethylene, polyvinyl chloride, ethylene oxide, ethylene glycol, vinyl acetate, etc., accounting for more than 75% of petrochemical products, and are widely used in various national economic industries such as plastics, pharmaceuticals, textiles, and coatings. At present, naphtha is mainly used as raw material in industry, which is cracked into a variety of low-carbon hydrocarbon mixtures, and then ethylene is separated and extracted from it. Ethylene and ethane have similar molecula...

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