Metal-organic framework material for separating ethylene and acetylene, and method for separating ethylene and acetylene

A metal-organic framework and ethylene technology, which is applied in the preparation of metal-organic framework materials and the separation of alkenes and alkynes, can solve the problems of expensive ligands, a large amount of organic waste liquid, and high preparation costs, and achieve adsorption and separation options. Good performance, high adsorption selectivity, and low synthesis cost

Active Publication Date: 2018-10-19
ZHEJIANG UNIV
View PDF5 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the stability of most metal-organic framework materials is poor and the preparation cost is high. Not only are the ligands generally more expensive, but the synthesis process of the...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Metal-organic framework material for separating ethylene and acetylene, and method for separating ethylene and acetylene
  • Metal-organic framework material for separating ethylene and acetylene, and method for separating ethylene and acetylene
  • Metal-organic framework material for separating ethylene and acetylene, and method for separating ethylene and acetylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Add the aqueous solution containing 1mmol pyrazine-2,3-dicarboxylic acid and 2mmol sodium hydroxide dropwise to the aqueous solution containing 1mmol copper perchlorate hexahydrate and 12.5mmol pyrazine for reaction at room temperature, and the solids obtained in the reaction are successively watered Washing and methanol washing several times to obtain the purified metal-organic framework material, the XRD characterization data of the material structure is shown in the appendix figure 1 . The purified adsorbent was vacuum degassed at 120 °C for 12 hours to obtain the desolvated adsorbent, followed by gas adsorption.

[0045] To test the adsorption-separation performance of the above-synthesized MOFs, a single-component adsorption isotherm of ethylene acetylene was carried out using the above-mentioned adsorbents. Take 100mg of adsorbent and set the adsorption temperature to 0°C. After testing, at 25°C and 1 bar, the adsorption capacity of acetylene reaches 2.08mmol / g,...

Embodiment 2

[0049] A water / ethanol (volume ratio 1:1) solution containing 1 mmol pyrazine-2,3-dicarboxylic acid, 2 mmol sodium hydroxide and 0.5 mmol 4,4'-bipyridyl was added dropwise to 1 mmol copper perchlorate hexahydrate Compound in water / ethanol (volume ratio 1:1) solution, stirred at room temperature for 24 hours. The solid obtained from the reaction was washed with water and methanol several times in sequence to obtain the purified metal-organic framework material. The XRD characterization data of the material structure is shown in the attached image 3 . The purified adsorbent was vacuum degassed at 120 °C for 12 hours to obtain the desolvated adsorbent, followed by gas adsorption.

[0050] To test the adsorption-separation performance of the above-synthesized MOFs, a single-component adsorption isotherm of ethylene acetylene was carried out using the above-mentioned adsorbents. Take 100mg of adsorbent and set the adsorption temperature to 0°C. After testing, at 25°C and 1 bar,...

Embodiment 3

[0054] Add the aqueous solution containing 1mmol pyrazine-2,3-dicarboxylic acid, 2mmol sodium hydroxide and 0.5mmol triethylenediamine dropwise to the aqueous solution containing 1mmol copper perchlorate hexahydrate to react at room temperature, and the resulting solid Washing with water and methanol several times in sequence to obtain the purified metal-organic framework material. The purified adsorbent was vacuum degassed at 120 °C for 12 hours to obtain the desolvated adsorbent, followed by gas adsorption.

[0055] To test the adsorption-separation performance of the above-synthesized MOFs, a single-component adsorption isotherm of ethylene acetylene was carried out using the above-mentioned adsorbents. Take 100mg of adsorbent and set the adsorption temperature to 0°C. After testing, at 25°C and 1 bar, the adsorption capacity of acetylene reaches 0.372mmol / g, and the adsorption capacity of ethylene is only 0.159mmol / g.

[0056] In order to test the stability of the sample...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Adsorption capacityaaaaaaaaaa
Adsorption capacityaaaaaaaaaa
Adsorption capacityaaaaaaaaaa
Login to view more

Abstract

The invention provides a metal-organic framework material for separating acetylene and ethylene, and a method for separating ethylene and acetylene. The metal-organic framework material has the advantages of good stability, high adsorption capacity, good adsorption separation selectivity, simple preparation method and low preparation cost. The structural general formula of the metal-organic framework material is Cu2(pzdc)2L.2H2O, pzdc in the formula is pyrazine-2,3-dicarboxylic acid, and the material is a three-dimensional network structure formed by copper ions, the pyrazine-2,3-dicarboxylicacid and an organic ligand A through a coordination bond or an intermolecular action force. The preparation method comprises the following steps: (1) mixing and reacting an inorganic salt, the pyrazine-2,3-dicarboxylic acid, an alkali and the organic ligand in proportion, wherein the inorganic salt is chloride, nitrate, acetate, sulfate or perchlorate of the copper ions; and (2) sequentially washing a product obtained after the reaction is finished with ionized water and anhydrous methanol, and then carrying out vacuum drying to obtain the metal-organic framework material. The metal-organic framework material is used as an adsorbent to adsorb and separate a mixed gas containing ethylene and acetylene.

Description

technical field [0001] The invention relates to the technical field of adsorption materials and energy, in particular to a preparation method of a metal organic framework material and its application in the separation of alkenes and alkynes. Background technique [0002] Ethylene is currently the largest chemical produced by human beings. The technical level and scale of ethylene production marks the development level of a country's petrochemical industry. Ethylene is mainly used in the production of polyethylene (HDPE, LDPE, LLDPE), ethylene oxide, ethylene dichloride / vinyl chloride monomer, and ethylbenzene. Ethylene is obtained by pyrolysis of petroleum, shale gas, or coal, but the pyrolysis products often contain alkanes, monoolefins, dienes, alkynes, diacetylenes, etc. with different carbon numbers. In industrial production, high-purity polymer grade ethylene is often required. For example, in the process of producing polyethylene, the presence of acetylene will deact...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B01J20/22B01J20/30B01D53/04C07C7/12C07C11/04C07C11/28
CPCB01D53/04B01J20/226C07C7/12C07C11/04C07C11/28
Inventor 鲍宗必高碧轩任其龙郑芳张治国杨亦文杨启炜
Owner ZHEJIANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap