Terbium coordination polymer for separating propyne/propylene mixed gas and preparation method thereof

Abstract

The invention provides a terbium coordination polymer for separating propyne / propylene mixed gas and a preparation method thereof. The chemical formula of the terbium coordination polymer is [Tb 2 ·(O 2 C‑C 6 h 2 f 2 -C 6 h 2 f 2 ‑CO 2 ) 3 ·H 2 O](O 2 C‑C 6 h 2 f 2 -C 6 h 2 f 2 ‑CO 2 Represents 3,3',5,5'-tetrafluorobiphenyl-4,4'-dicarboxylic acid), belongs to the tetragonal crystal system, and the space group is P4 1 22; Unit cell parameters are α=90°, β=90°, γ=90°, Z=4. The preparation method of the terbium coordination polymer comprises the following steps: mixing terbium salt, 3,3',5,5'-tetrafluorobiphenyl-4,4'-dicarboxylic acid and o-fluorobenzoic acid, and then putting them into a container in a reaction kettle with an organic solvent, and react at 358-373K to obtain the terbium coordination polymer. The terbium coordination polymer can be used to separate propyne / propylene mixed gas.

Description

technical field [0001] The invention belongs to the field of coordination chemistry, and in particular relates to a porous coordination polymer capable of selectively adsorbing and separating propyne / propylene mixed gas and a preparation method thereof. Background technique [0002] Porous coordination polymers are formed by metal ions and bridging ligands through coordination bonds. They have a three-dimensional periodic network structure and have both the advantages of inorganic materials and organic materials. They are a new type of crystalline porous materials. [0003] Propylene is an important chemical raw material. Propylene will inevitably be mixed with propyne during the production process, and the existence of trace propyne will reduce the quality of the product, and then affect the reaction of producing other chemicals from propylene. The boiling points of propylene and propyne are very close, and the relative molecular weight and molecular size are also very clo...

AI Technical Summary

Problems solved by technology

Industrially, partial hydrogenation or cryogenic distillation is used to remove propyne in propylene. These methods have the problems of high energy consumption and low selectivity.

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