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Method for for selectively adsorbing and separating nitrogen and proximity gas

A selective, gas technology, applied in separation methods, chemical instruments and methods, gas fuels, etc., can solve the problems of difficult separation of nitrogen and methane, and achieve the effects of mild synthesis conditions, simple preparation methods, and good adsorption effects.

Active Publication Date: 2022-01-04
XIAN MODERN CHEM RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a method for selective adsorption and separation of nitrogen and methane gas, and solve the technical problem that nitrogen and methane are difficult to separate from the mixed gas of the two in the prior art

Method used

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  • Method for for selectively adsorbing and separating nitrogen and proximity gas
  • Method for for selectively adsorbing and separating nitrogen and proximity gas
  • Method for for selectively adsorbing and separating nitrogen and proximity gas

Examples

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Embodiment 1

[0044] The present embodiment provides a kind of preparation method of zinc energetic complex of 5-aminotetrazole, and this method comprises the following steps: in 10mL there-necked flask, add 8mL N,N-dimethylformamide and 2mL water, stir Add 36.3mg (0.1mmol) of 5-aminotetrazole and 38.0mg (0.2mmol) of zinc nitrate hexahydrate, heat to 40°C to dissolve completely, and obtain a colorless clear liquid, cool to room temperature, and filter out the insoluble matter. The filtrate was placed in a clean beaker and slowly evaporated at room temperature for 7 days to obtain colorless crystals. The reaction solution was filtered off to obtain a white solid with a yield of 78%.

Embodiment 2

[0046] This embodiment provides a kind of preparation method of zinc energetic complex of 5-aminotetrazole, and this method comprises the following steps: in 250mL there-necked flask, add 80mL N,N-dimethylformamide and 20mL water, stir Add 363mg (1mmol) of 5-aminotetrazole and 380mg (2mmol) of zinc nitrate hexahydrate, heat to 40°C to dissolve completely, and obtain a colorless clear liquid, cool to room temperature, filter out the insoluble matter, and place the filtrate in a clean In a beaker, slowly volatilized at room temperature for 7 days to obtain colorless crystals. The reaction solution was filtered off to obtain a white solid with a yield of 69%.

[0047] From the comparison of Example 1 and Example 2, it can be seen that when the amount of raw materials in Example 2 is ten times larger than that of Example 1, the yield only drops from 78% of Example 1 to 69% of Example 2 , the decline is not obvious, indicating that the preparation method of the present invention h...

Embodiment 3

[0060] This example provides a method for selective adsorption and separation of nitrogen and methane gas, which uses 5-aminotetrazolium zinc energetic complex as an adsorbent to selectively adsorb and separate nitrogen and methane gas.

[0061] The 5-aminotetrazole zinc energetic complex in this example is the 5-aminotetrazole zinc energetic complex in Example 1 or 2.

[0062] The specific process is as follows:

[0063] First, solvent displacement of the target compound:

[0064] In a 100mL three-necked beaker, add 60mL of dichloromethane and 1.0g of 5-aminotetrazolium zinc energetic complex, replace the dichloromethane every 6.0h, and soak for 1d. The energetic complex of zinc 5-aminotetrazolium obtained by suction filtration was degassed at 140° C. for 12.0 h under high vacuum. The energetic complex of 5-aminotetrazole zinc after solvent replacement is obtained, and the trace moisture remaining in the target product 5-aminotetrazole zinc energetic complex is removed, and...

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Abstract

The invention provides a method for selectively adsorbing and separating nitrogen and proximity gas. According to the method, a 5-aminotetrazole zinc energetic complex is adopted as an adsorbent to selectively adsorb and separate nitrogen and proximity gas. The proximitygas is methane or carbon dioxide. The 5-aminotetrazole zinc complex disclosed by the invention has a selective adsorption effect on N2 and has a relatively good adsorption effect. The 5-aminotetrazole zinc energetic complex disclosed by the invention provides a new thought for adsorption separation of N2 and CH4 molecules with very close physicochemical properties, especially for solving the key common technical problem in an unconventional methane gas purification / recovery process, and has a wide application prospect for separation of N2 and CH4 gas components. The method has a wide application prospect in separation of two most major components in later-stage flue gas (flue gas flow generated by fuel combustion and mainly composed of CO2, CO and N2).

Description

technical field [0001] The invention belongs to the field of propellant, relates to an adsorbent, in particular to a selective adsorption and separation method for nitrogen and close gas. Background technique [0002] Energy shortage and environmental pollution are two major issues facing our country at present. Methane (CH 4 ) is an internationally recognized low-carbon clean energy. Its development and clean utilization have become one of the major strategies to solve the contradiction between energy supply and demand in my country, realize energy diversification, and maintain sustainable development of the economic environment. According to my country's energy planning, the proportion of natural gas in primary energy consumption is planned to increase to 12% by 2022, which is equivalent to an annual consumption of 400 billion cubic meters. The natural gas resource gap will reach 150 billion cubic meters, and the contradiction between supply and demand is becoming increas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/047B01J20/22B01J20/30C10L3/10
CPCB01D53/047B01J20/226C10L3/104B01D2257/102B01D2256/22B01D2256/245Y02C20/40
Inventor 谭博军刘宁莫洪昌徐明辉张鹏峰
Owner XIAN MODERN CHEM RES INST
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