Method for separating ethylene and acetylene from mixed gas

A mixed gas and ethylene technology, applied in chemical instruments and methods, adsorption purification/separation, organic chemistry, etc., can solve the problems of a large amount of organic waste liquid, expensive ligands, high preparation costs, etc., and achieve high adsorption selectivity, The effect of low raw material price and low material synthesis cost

Active Publication Date: 2018-05-11
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 material requires N,N-dimethylformamide or N,N-dimethyl In organic solvents such as acetamide, the subsequent purification process of the material produces a large amount of organic waste liquid

Method used

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  • Method for separating ethylene and acetylene from mixed gas
  • Method for separating ethylene and acetylene from mixed gas
  • Method for separating ethylene and acetylene from mixed gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Mix 2mmol of anhydrous magnesium chloride, 4mmol of gallic acid, 5mmol of potassium hydroxide, and 10ml of deionized water, put them in a 25mL hydrothermal reactor, stir for 30 minutes, and then heat to 120°C for 24 hours of reaction. After the reaction is completed, after the reaction kettle is cooled, the solid obtained by the reaction is washed with water and washed with ethanol several times to obtain a purified metal organic framework material. The purified adsorbent is vacuum degassed at 120° C. for 24 hours to obtain a solvent-free adsorbent, which is then subjected to gas adsorption.

[0040] In order to test the adsorption and separation performance of the above-mentioned synthesized metal organic framework material, the single-component adsorption isotherm of ethylene acetylene was performed using the above-mentioned adsorbent. Take an appropriate amount of adsorbent, and the adsorption temperature is 25 degrees. After testing, at 25℃ and 1bar, the adsorption ca...

Embodiment 2

[0044] Mix 2mmol of cobalt chloride hexahydrate, 4mmol of gallic acid, 1.6mmol of potassium hydroxide, and 10mL of deionized water, put them into a 25mL hydrothermal reactor, stir for 30 minutes, and react at 120°C for 24 hours. After the reaction is completed, it is cooled, and washed with water and ethanol three times to obtain a purified metal organic framework material. The purified adsorbent is vacuum degassed at 120°C for 24 hours to obtain a solvent-free adsorbent, which is then subjected to gas adsorption.

[0045] In order to test the adsorption and separation performance of the above-mentioned synthesized metal organic framework material, the single-component adsorption isotherm of ethylene acetylene was performed using the above-mentioned adsorbent. Take an appropriate amount of adsorbent, and the adsorption temperature is 25 degrees. After testing, at 25℃ and 1bar, the adsorption capacity of acetylene is as high as 3.78mmol / g, and the adsorption capacity of ethylene ...

Embodiment 3

[0049] Mix 2mmol of nickel chloride hexahydrate, 4mmol of gallic acid, 1.6mmol of potassium hydroxide, and 10mL of deionized water, put them in a 25mL hydrothermal reactor, stir for 30 minutes, and react at 120°C for 24 hours. After the reaction is completed, the reactor is cooled, and washed with water and ethanol three times to obtain a purified metal organic framework material. The purified adsorbent is vacuum degassed at 120° C. for 24 hours to obtain a solvent-free adsorbent, which is then subjected to gas adsorption.

[0050] In order to test the adsorption and separation performance of the above synthesized metal organic framework material, the single-component adsorption isotherm of ethylene acetylene was performed using the above adsorbent. Take an appropriate amount of adsorbent, and the adsorption temperature is 25 degrees. After testing, at 25℃ and 1bar, the adsorption capacity of acetylene is as high as 3.01mmol / g and the adsorption capacity of ethylene is only 1.83...

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Abstract

The invention discloses a method for separating ethylene and acetylene from a mixed gas. The method comprises the step of using a metal organic frame material as an adsorbent for separating the ethylene and the acetylene from the mixed gas containing the ethylene and the acetylene; the metal organic frame material has a structural formula of M(C7O5H4).2H2O, wherein M is a metal ion, and the metalorganic frame material is a three-dimensional network structure formed by coordination bonds or intermolecular forces from a transition metal ion or alkaline earth metal ion and gallic acid. The metalorganic frame material has a large adsorption capacity for the acetylene and an excellent selectivity for adsorption and separation of ethylene/acetylene. The materials for the synthesis of the material is cheap and easy to obtain, the material preparation process is simple, and the cost is low; and the material has good regeneration and repetition performance, can still 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 preparation method of a metal organic framework material and its application in the separation of alkenes and alkynes. Background technique [0002] Ethylene has always been known as the "mother of the petrochemical industry" and is one of the most important basic raw materials in the chemical industry. Its production capacity is considered to be the embodiment of a country's economic strength. At present, ethylene is widely used in the production of lubricating oil, plastics, polymers and other chemical materials. It is generally obtained through the cracking of petroleum, natural gas and multi-carbon hydrocarbons. However, the cracked products are often complex in composition and often carry different carbon numbers. Alkanes, monoolefins, diolefins, alkynes, diacetylenes, etc., often require high-purity polymer-grade ethylene in industrial productio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C07C7/12C07C11/04C07C11/24
CPCB01J20/226C07C7/12C07C11/04C07C11/24
Inventor 任其龙鲍宗必赵迎财谢丹妍王佳伟邢华斌张治国杨启炜杨亦文
Owner ZHEJIANG UNIV
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