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Method for adsorption separation of propylene, propyne, propane and propadiene

A technology of propadiene and propyne is applied in the field of adsorption and separation of propylene, propyne, propane and propadiene, which can solve the problems of poor hydrothermal stability, high preparation cost and high ligand price, and achieve stable performance and high performance. Adsorption selectivity, effect of simple purification steps

Active Publication Date: 2019-02-01
ZHEJIANG UNIV
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  • Abstract
  • Description
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Problems solved by technology

[0005] However, the hydrothermal stability of most metal-organic framework materials is poor and the preparation cost is high, not only the price of the ligand is high, but also the reaction needs to be carried out in an organic solvent during the whole synthesis process, organic solvents such as N,N-dimethyl methyl formamide or N,N-dimethylacetamide, etc., and the subsequent purification process of the material produces a large amount of organic waste liquid

Method used

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  • Method for adsorption separation of propylene, propyne, propane and propadiene
  • Method for adsorption separation of propylene, propyne, propane and propadiene
  • Method for adsorption separation of propylene, propyne, propane and propadiene

Examples

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Effect test

Embodiment 1

[0038] Mix 0.151mmol calcium carbonate, 0.151mmol squaraine, and 20mL deionized water, put them into a 25mL hydrothermal reaction kettle, stir for 30 minutes, and react at 120°C for 24 hours. After the reaction is completed, the reactor is cooled, and washed with pure water for several times to obtain a purified metal organic framework material. The purified adsorbent was vacuum degassed at 100 °C for 12 h to obtain the desolvated adsorbent, followed by gas adsorption.

[0039] Single-component adsorption isotherms for propene, propyne, propane, and allene were performed using the above adsorbents. Take an appropriate amount of adsorbent, and the adsorption temperature is 0 degrees and 25 degrees. At 0°C and 1 bar, the adsorption capacity of propylene reaches 2.9mmol / g, the adsorption capacity of propyne is 3.3mmol / g, the adsorption capacity of propane is 2.7mmol / g, and the adsorption capacity of propadiene is 3.5mmol / g. This system is at 0°C and 0.01bar; the adsorption capa...

Embodiment 2

[0042] Mix 1.93mmol cobalt chloride hexahydrate, 2.88mmol squaraine, 7.72mmol potassium hydroxide, and 7ml deionized water, put them into a 25mL hydrothermal reactor, stir for 30 minutes, and then heat to 220°C for 48 hours. After the reaction is completed, the reactor is cooled, and the solid obtained from the reaction is washed with pure water several times to obtain a purified metal-organic framework material. The purified adsorbent was vacuum degassed at 120 °C for 12 h to obtain the desolvated adsorbent, followed by gas adsorption.

[0043] In order to test the stability of the samples, the samples were exposed to air with a relative humidity of 60% for 7 days and soaked in pure water for 7 days, and then XRD measurements were performed on the samples under various conditions. XRD curve see figure 2 . From the results, whether soaked in water for 7 days or exposed to air with a relative humidity of 60% for 7 days, the XRD of the adsorbent is consistent with that just s...

Embodiment 3

[0045] Mix 1.93mmol nickel chloride hexahydrate, 2.88mmol squaraine, 7.72mmol potassium hydroxide, and 7mL deionized water, put them into a 25mL hydrothermal reactor, stir for 30 minutes, and react at 220°C for 48 hours. After the reaction is completed, it is cooled and washed with pure water several times to obtain a 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.

[0046] In order to test the stability of the sample, the sample was exposed to air with a relative humidity of 60% for 7 days and soaked in pure water for 7 days, and then the XRD determination of the adsorbent under each condition was carried out. XRD curve see image 3 . From the results, whether soaked in water for 7 days or exposed to air with a relative humidity of 60% for 7 days, the XRD of the adsorbent is consistent with that just synthesized, indicating the excellent stability of ...

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Abstract

The invention discloses a method for separating propylene, propyne, propane and propadiene from a mixed gas. The method comprises: separating a mixed gas containing propylene, propyne, propane and propadiene by using a metal organic framework material as an adsorbent to obtain the gases of each single component, wherein the structural general formula of the metal organic framework material is [M(C4O4)(H2O)].1.5H2O, M is a metal ion, and transition metal ions or alkaline earth metal ions and squaric acid form a three-dimensional network structure through a coordination bond or intermolecular force. According to the present invention, the metal organic framework material has excellent adsorption separation selectivity to propylene, propyne, propane and propadiene, further has characteristicsof cheap and easily available raw materials, simple preparation process, low cost, good regeneration property and good repeatability, can maintain the original adsorption effect after vacuum or heating regeneration, and has broad industrial application prospects.

Description

technical field [0001] The invention relates to the technical field of adsorption materials and energy sources, in particular to a method for adsorption and separation of propylene, propyne, propane and propadiene. Background technique [0002] Propylene (C 3 h 6 ) as the most basic chemical raw material has been widely used in the production of various chemicals, such as the total production of polypropylene reached 85 million tons in 2013, second only to the output of polyethylene. At present, propylene is generally obtained through the cracking of petroleum and multi-carbon hydrocarbons, but the cracking products are often complex in composition, usually containing a trace amount (1000-2000ppm) of propyne (C 3 h 4 ) and propadiene, etc. In order to obtain polymer grade propylene for production, the amount of propyne and propadiene must be reduced to 5ppm or even 1ppm, but due to the similar structure of propylene / propyne, similar molecular dynamics size and very trace...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/06C07C11/14C07C11/22C07C9/08C07C7/12B01J20/26B01J20/30B01D53/02C08G83/00
CPCB01D53/02B01J20/226C07C7/12C08G83/008C07C11/06C07C11/14C07C11/22C07C9/08B01J20/3071B01D2253/204B01D2256/24B01D2257/7022B01J20/3085
Inventor 鲍宗必李良英任其龙张治国杨亦文杨启炜
Owner ZHEJIANG UNIV
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