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

A technology of coordination polymer and tetragonal crystal system, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of high energy consumption, low selectivity, etc., and achieve good repeatability, good separation, and high yield Effect

Active Publication Date: 2020-01-17
JIANGXI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Mix terbium chloride, 3,3',5,5'-tetrafluorobiphenyl-4,4'-dicarboxylic acid and o-fluorobenzoic acid in a molar ratio of 2:1:5, and put in a 2 ml The volume of N,N-dimethylformamide solvent is 20 ml in a polytetrafluoroethylene-lined autoclave, the amount of terbium chloride is controlled at 5.5 mg, and then reacted at a constant temperature of 358K for 1 day to obtain colorless crystals , that is, the terbium coordination polymer [Tb 2 ·C 42 h 12 f 12 o 12 ·H 2 O], the yield was 48%.

Embodiment 2

[0026] Mix terbium nitrate, 3,3',5,5'-tetrafluorobiphenyl-4,4'-dicarboxylic acid and o-fluorobenzoic acid in a molar ratio of 2:1:5, and put them in a container containing 2 ml of N , the volume of N-dimethylformamide solvent is in the autoclave of polytetrafluoroethylene lining of 20 milliliters, the amount of terbium chloride is controlled at 7.0 milligrams, then constant temperature reacts 1 day under 358K, obtains colorless crystal, Terbium coordination polymer [Tb 2 ·C 42 h 12 f 12 o 12 ·H 2 O] with a yield of about 43%.

Embodiment 3

[0028] Mix terbium acetate, 3,3',5,5'-tetrafluorobiphenyl-4,4'-dicarboxylic acid and o-fluorobenzoic acid in a molar ratio of 2:1:5, and put them in a container containing 2 ml of N , the volume of N-dimethylformamide solvent is in the autoclave of polytetrafluoroethylene lining of 20 milliliters, the amount of terbium chloride is controlled at 6.7 milligrams, then constant temperature reacts 1 day under 358K, obtains colorless crystal, Terbium coordination polymer [Tb 2 ·C 42 h 12 f 12 o 12 ·H 2 O] with a yield of about 41%.

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Abstract

The invention provides a terbium coordination polymer for separating propyne / propylene gas mixture and a preparation method thereof. The terbium coordination polymer has a chemical formula of [Tb2. C42H12F12O12.H2O] and belongs to a tetragonal crystal system; the space group of the polymer is P4122; and unit cell parameters are that a is equal to 15.8-15.9 angstroms, b is equal to15.8-15.9 angstroms, c is equal to 27.5-27.6 angstroms, alpha is equal to 90 degrees, beta is equal to 90 degrees, gamma is equal to 90 degrees and Z is equal to 4. The preparation method of the terbium coordination polymer comprises the following steps: mixing a terbium salt, 3,3',5,5'-tetrafluorobiphenyl-4,4'-dicarboxylic acid and o-fluorobenzoic acid, then putting the formed mixture into a reaction kettle containing an organic solvent, and then carrying out a reaction at 358-373 K to obtain the terbium coordination polymer. The terbium coordination polymer can be used for separating the propargyl / propylenegas mixture.

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...

Claims

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Application Information

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IPC IPC(8): C08G83/00B01J20/22B01J20/30
CPCB01J20/226C08G83/008
Inventor 刘庆燕林兆廷王玉玲
Owner JIANGXI NORMAL UNIVERSITY
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