Temperature-sensitive metal organic skeleton material, preparation method, and applications thereof

A metal-organic framework and temperature-sensitive technology, applied in the field of metal-organic framework porous materials and their preparation, can solve problems such as multiple energy consumption, achieve fast reaction, reversible and repeatable adsorption/desorption process, and easy desorption and regeneration. Effect

Inactive Publication Date: 2015-07-15
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, the stronger the adsorption capacity of the adsorbent, the greater its desorption energy, and the more energy consumption is required for the desorption process.

Method used

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  • Temperature-sensitive metal organic skeleton material, preparation method, and applications thereof
  • Temperature-sensitive metal organic skeleton material, preparation method, and applications thereof
  • Temperature-sensitive metal organic skeleton material, preparation method, and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 0.3716g Cu(ClO 4 ) 2 ·6H 2 O and 1.0012g pyrazine are dissolved in the aqueous solution of 20mL ethanol (ethanol: H 2 (2 volume ratio 1:1), 0.1682g organic ligand 2,3-pyrazine dicarboxylic acid is dissolved in the aqueous solution of 20mL ethanol (ethanol: H 2 O volume ratio 1:1), then slowly add the ethanol aqueous solution of 2,3-pyrazine dicarboxylic acid into Cu(ClO 4 ) 2 ·6H 2 In the ethanol aqueous solution of O and pyrazine; Continue to stir 5h after dropwise addition, obtain blue solid; Then blue solid powder is washed 3 times with the aqueous solution of ethanol, soaked in methanol three times, replace a new methanol every 10h, finally use Centrifuge at 7000r / min for 8min, and vacuum dry at 100°C for 6h to obtain the temperature-sensitive metal-organic framework material.

Embodiment 2

[0046] 0.3604g Cu(ClO 4 ) 2 ·6H 2 O and 0.8041g pyrazine are dissolved in the aqueous solution of 15mL ethanol (ethanol: H 2 (2 volume ratio 5:1), 0.1576g organic ligand 2,3-pyrazine dicarboxylic acid is dissolved in the aqueous solution of 15mL ethanol (ethanol: H 2 (2 volume ratio 5:1), then slowly add the ethanol aqueous solution of 2,3-pyrazine dicarboxylic acid into Cu(ClO 4 ) 2 ·6H 2 In the ethanol aqueous solution of O and pyrazine; Continue to stir 2h after dropwise addition, obtain blue solid; Then blue solid powder is washed 2 times with the aqueous solution of ethanol, chloroform soaks 3 times, every 8h replaces a new chloroform, finally Centrifuge at 8000r / min for 5min, and vacuum dry at 80°C for 8h to obtain the temperature-sensitive metal-organic framework.

Embodiment 3

[0048] 0.3821g Cu(ClO 4 ) 2 ·6H 2 O and 1.2096g pyrazine are dissolved in the aqueous solution of 25mL ethanol (ethanol: H 2 (2 volume ratio 2:1), 0.1690g organic ligand 2,3-pyrazine dicarboxylic acid is dissolved in the aqueous solution of 25mL ethanol (ethanol: H 2 (2 volume ratio 2:1), then under stirring at room temperature, the ethanol aqueous solution of 2,3-pyrazine dicarboxylic acid was slowly added dropwise to Cu(ClO 4 ) 2 ·6H 2 O and pyrazine in an aqueous ethanol solution; after the dropwise addition, continue to stir for 8 hours to obtain a blue solid; then wash the blue solid powder with an aqueous solution of ethanol for 3 times, soak in DMF (N,N-dimethylformamide) for 2 time, replace with new DMF every 12 hours, and finally centrifuge at 6000r / min for 10 minutes, and vacuum dry at 150°C for 5 hours to obtain the temperature-sensitive metal-organic framework material.

[0049] Performance testing and analysis:

[0050] (1) Crystal structure properties of t...

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Abstract

The invention belongs to the technical field of metal organic skeleton materials, and discloses a temperature-sensitive metal organic skeleton material, a preparation method, and applications thereof. In the preparation method, copper perchlorate, pyrazine, and pyrazine-2,3-dicarboxylic acid (double organic ligands) are stirred in a solvent at a room temperature to prepare the temperature-sensitive metal organic skeleton material. The temperature-sensitive metal organic skeleton material has a flexible skeleton structure, which can generate skeleton swelling absorption. The temperature-sensitive metal organic skeleton material has different swelling conversion pressures on alkene and alkane, so the temperature-sensitive metal organic skeleton material has a high selectivity on alkene and alkane, can carry out skeleton structure swelling absorption on alkene at the temperature of 273 K, and carry out skeleton structure contraction desorption at the temperature of 298 K, and thus desorption regeneration is easy for the skeleton material. The temperature-sensitive metal organic skeleton material can be used as an efficient energy-saving absorption separating material in the field of alkene/alkane separation and has a vast application prospect.

Description

technical field [0001] The invention belongs to the technical field of metal-organic framework porous materials, and in particular relates to a metal-organic framework porous material with a temperature-sensitive effect and a preparation method and application thereof. Background technique [0002] As the pillars of the petrochemical industry, ethylene and propylene are widely used in the synthesis of fibers, rubber, resins, etc., and have always played an important role in the national economy. Refinery dry gas is an important resource in petrochemical industry, which is rich in ethylene and propylene, and its separation and recovery has important economic value. [0003] At present, the separation and recovery of olefins and alkanes in dry gas mainly include cryogenic distillation separation, membrane separation and hydrate separation. Among them, the cryogenic rectification separation method is a common method for separating light olefins at present. It uses the differen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C07F1/08B01D53/02C10G70/04
CPCY02P20/50
Inventor 夏启斌李玉洁陈永伟李忠奚红霞肖静
Owner SOUTH CHINA UNIV OF TECH
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