Layered porous material for adsorbing and separating allylene and propylene and preparation method and application thereof

A propyne, propyne, adsorption separation technology, applied in the field of chemical engineering, can solve problems such as the inability to realize the adsorption of propyne and exclusion of propyne, and achieve the effects of good industrial application prospects, large adsorption capacity, and complete crystal structure

Active Publication Date: 2020-06-19
ZHEJIANG UNIV
2 Cites 1 Cited by

AI-Extracted Technical Summary

Problems solved by technology

However, it has been found through experiments that when the adsorbent used in this patented technology is applied to the adsorption and separation of propy...
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Abstract

The invention discloses a layered porous material for adsorbing and separating allylene and propylene, which has periodic intra-layer rhombic pore channels and interlayer broken line type pore channels, is formed by metal ions M, inorganic anions A and organic ligands L through coordination bonds and supramolecular action, and has a structural general formula of ML2A, wherein the metal ion M is atleast one of Fe<2+>, Co<2+>, Ni<2+>, Cu<2+> and Zn<2+>, the inorganic anion A is at least one of TiF6<2->, GeF6< 2->, NbOF5<->, ZrF6<2-> and SnF6<2->, and the structural formula of the organic ligandL is shown in the specification, wherein R1 to R8 are independently selected from H, F, Cl, Br, I, CH3, NH2, OH or COOH respectively. The invention further discloses a method for adsorbing and separating allylene and propylene, the layered porous material is used as an adsorbent, the adsorbent is in contact with mixed gas containing allylene and propylene, allylene is selectively adsorbed, and separation of allylene and propylene is achieved.

Application Domain

Other chemical processesAdsorption purification/separation +1

Technology Topic

Selective adsorptionAdsorption separation +6

Image

  • Layered porous material for adsorbing and separating allylene and propylene and preparation method and application thereof
  • Layered porous material for adsorbing and separating allylene and propylene and preparation method and application thereof
  • Layered porous material for adsorbing and separating allylene and propylene and preparation method and application thereof

Examples

  • Experimental program(8)

Example Embodiment

[0059] Example 1
[0060] Put 10mL containing 0.25mmol Cu(BF 4 ) 2 ·H 2 O, (NH 4 ) 2 GeF 6 The aqueous solution was added dropwise to 10 mL of methanol solution containing 0.5 mmol of 4,4-dipyridine sulfide, and then 20 mL of a mixed solution containing metal salts, inorganic anions and organic ligands was placed in an oven at 80°C for 48 hours. After the reaction, blue crystals are obtained. The obtained product is filtered and then washed with methanol and allowed to stand for 3 days. The methanol is replaced every other day, and then vacuum activated at 100°C for 24 hours to obtain a GeFSIX-dps-Cu layered porous material.
[0061] The thermogravimetric curve of the GeFSIX-dps-Cu layered porous material obtained in this example is as follows figure 1 As shown, it has high thermal stability.
[0062] The adsorption isotherm of the GeFSIX-dps-Cu layered porous material obtained in this example for propargylpropene at 298K is as follows figure 2 As shown, the material has a relatively high propyne adsorption capacity (3.73 mmol/g) under normal temperature and pressure and simultaneously excludes propylene.
[0063] The adsorption isotherm of the GeFSIX-dps-Cu layered porous material obtained in this example for propargylpropene at 273K is as follows image 3 As shown, the material has a high propyne adsorption capacity (3.87 mmol/g) under the conditions of 273K and 1 bar and simultaneously excludes propylene.

Example Embodiment

[0064] Example 2
[0065] 10mL containing 0.25mmol ZnGeF 6 The methanol solution was dropped into 10 mL methanol solution containing 0.5 mmol 4,4-dipyridine sulfide, and then 20 mL of a mixed solution containing metal salts, inorganic anions and organic ligands was reacted at room temperature for 72 hours. After the reaction, white crystals are obtained. The obtained product is filtered and then washed with methanol and allowed to stand for 3 days. The methanol is replaced every other day, and then vacuum activated at room temperature for 24 hours to obtain the GeFSIX-dps-Zn layered porous material.
[0066] The thermogravimetric curve of the GeFSIX-dps-Zn layered porous material obtained in this example is as follows Figure 4 As shown, it has high thermal stability.
[0067] The adsorption isotherm of the GeFSIX-dps-Zn layered porous material obtained in this example for propargylpropene at 298K is as follows Figure 5 As shown, the material has a high propyne adsorption capacity (3.48 mmol/g) under normal temperature and pressure, and at the same time excludes propylene.
[0068] The adsorption isotherm of the GeFSIX-dps-Zn layered porous material obtained in this example for propargylpropene at 273K is as follows Image 6 As shown, the material has a high propyne adsorption capacity (3.78 mmol/g) under the conditions of 273K and 1 bar and simultaneously excludes propylene.

Example Embodiment

[0069] Example 3
[0070] Put 10mL containing 0.25mmol Cu(BF 4 ) 2 ·H 2 O, (NH 4 ) 2 TiF 6 The aqueous solution was added dropwise to 10 mL of methanol solution containing 0.5 mmol of 4,4-dipyridine sulfide, and then 20 mL of a mixed solution containing metal salts, inorganic anions and organic ligands was placed in an oven at 80°C for 48 hours. After the reaction, blue crystals were obtained. The obtained product was filtered and washed with methanol and allowed to stand for 3 days. The methanol was replaced every other day in the middle, and then vacuum activated at 100°C for 24 hours to obtain TiFSIX-dps-Cu layered porous material.
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Description & Claims & Application Information

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