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Separation method of propyne and propylene

A separation method and propylene technology, applied in chemical instruments and methods, adsorption purification/separation, other chemical processes, etc., can solve the problems of difficult size screening, etc., and achieve easy operation and amplification, good stability, and mild synthesis conditions Effect

Active Publication Date: 2022-07-22
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although different in shape, based on The difference in kinetic diameter, the separation of the two, especially the size sieving is also relatively more difficult

Method used

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  • Separation method of propyne and propylene
  • Separation method of propyne and propylene
  • Separation method of propyne and propylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A mixed solution of deionized water and acetonitrile (v:v=1:2) containing 2mmol of 4,4'-dithiodipyridine was added dropwise to an equal volume of aqueous solution containing 1mmol of nickel chloride hexahydrate and 1mmol of potassium chromate. The reaction is carried out at room temperature, and the solid obtained by the reaction is successively washed with deionized water and acetonitrile for several times to obtain the purified metal organic framework material. The purified metal-organic framework material was vacuum degassed at 80 °C for 12 hours to obtain the desolvated metal-organic framework material as an adsorbent, followed by gas adsorption.

[0052] In order to test the adsorption separation performance of the above-synthesized metal-organic framework materials, single-component adsorption isotherms of propyne and propylene were carried out using the above-mentioned adsorbents. Take 100 mg of adsorbent and set the adsorption temperature to 25°C. After testing...

Embodiment 2

[0055] A mixed solution of deionized water and acetonitrile (v:v=1:2) containing 2mmol of 4,4'-dithiodipyridine was added dropwise to an equal volume of aqueous solution containing 1mmol of cobalt chloride hexahydrate and 1mmol of potassium chromate. The reaction is carried out at room temperature, and the solid obtained by the reaction is successively washed with deionized water and acetonitrile for several times to obtain the purified metal organic framework material. The purified metal-organic framework material was vacuum degassed at 80 °C for 12 hours to obtain the desolvated metal-organic framework material as an adsorbent, followed by gas adsorption.

[0056] In order to test the adsorption separation performance of the above-synthesized metal-organic framework materials, single-component adsorption isotherms of propyne and propylene were carried out using the above-mentioned adsorbents. Take 100 mg of adsorbent and set the adsorption temperature to 25°C. After testing...

Embodiment 3

[0059] A mixed solution of deionized water and acetonitrile (v:v=1:2) containing 2mmol of 4,4'-dithiodipyridine was added dropwise to an equal volume aqueous solution containing 1mmol of nickel chloride hexahydrate and 1mmol of sodium molybdate. The reaction is carried out at room temperature, and the solid obtained by the reaction is successively washed with deionized water and acetonitrile for several times to obtain the purified metal organic framework material. The purified metal-organic framework material was vacuum degassed at 80 °C for 12 hours to obtain the desolvated metal-organic framework material as an adsorbent, followed by gas adsorption.

[0060] In order to test the adsorption separation performance of the above-synthesized metal-organic framework materials, single-component adsorption isotherms of propyne and propylene were carried out using the above-mentioned adsorbents. Take 100 mg of adsorbent and set the adsorption temperature to 25°C. After testing, the...

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Abstract

The invention relates to a separation method of propyne and propylene. The separation method comprises the steps that mixed gas containing propyne and propylene makes contact with an adsorbent for adsorption separation, the adsorbent comprises a metal organic framework material, the metal organic framework material comprises a two-dimensional layered structure formed by metal ions, a compound shown in the formula I and pillared anions, and in the formula I, in the formula I, the two-dimensional layered structure is shown in the description. R1 to R8 are respectively and independently selected from hydrogen, C1-C6 alkyl, C1-C6 alkoxy, nitryl, amino and halogen. The separation method has high adsorption separation selectivity on propylene and propyne, and the adopted metal organic framework material is low in preparation cost and good in stability.

Description

technical field [0001] The invention belongs to the field of adsorption separation, in particular to a separation method of propyne and propylene. [0002] technical background [0003] As the second largest hydrocarbon in the world after ethylene, propylene is one of the most important chemical products (more than 120 million tons produced in 2016). It has been used as a chemical feedstock for the production of various products, including plastic polypropylene and copolymers, propylene oxide. Propylene is currently produced by steam cracking in petroleum refining. During the cracking process, undesirable impurities such as propyne are inevitably produced, which poisons the propylene polymerization catalyst. The removal of traces of propyne (1000 or 10000 ppm) from the propylene mixture is one of the most important separation processes for the production of polymer grade propylene gas (propyne impurities should be below 5 ppm). At present, the conventional methods for remo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C7/12C07C11/06C07C11/22B01J20/22B01J20/30
CPCC07C7/12B01J20/226B01J2220/4812B01J2220/4806C07C11/06C07C11/22
Inventor 鲍宗必郑芳任其龙张治国杨亦文杨启炜
Owner ZHEJIANG UNIV
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