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Metal salt-containing protonized ionic liquid absorbent and application thereof

A protonated ion, liquid absorbent technology, applied in organic chemistry, dispersed particle separation, absorption purification/separation, etc., can solve the problems of difficult olefin/alkane separation, huge operating costs and equipment costs, etc. Recycling, beneficial to long-term use, to solve the effect of silver salt instability

Inactive Publication Date: 2017-11-28
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, their identical physicochemical properties, such as molecular size and boiling point, bring great difficulties and challenges to the separation of alkenes / alkanes
[0003] At present, low-temperature rectification is the most commonly used industrial method for separating olefins / alkanes. However, due to the huge operating and equipment costs of the separation process, researchers continue to explore new and feasible separation methods for olefins / alkanes.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The experimental device for synthesizing ionic liquids is mainly a three-necked flask with a condensing reflux tube on the top and a dropping funnel and a stirring device. Accurately weighed 13.6265g 3-methoxypropylamine was dissolved in anhydrous methanol and placed in the flask, and the stirrer was turned on to stir, and under high-speed stirring, nitric acid solution (24.1497g, 69.41 %), the molar weight of nitric acid is equal to 3-amino propanol, drops in 60 minutes. And react at 50° C. for 6 hours. After the reaction was completed, the solvent and water were removed by rotary evaporation at 70° C. for 6 h to obtain the protonated ionic liquid of 3-methoxypropylamine nitrate.

[0027] Accurately weigh 3mL of 3-methoxypropylamine nitrate protonated ionic liquid, add 2.0384gAgNO 3 , 60 ℃ magnetic stirring for 4h, get 4mol / L AgNO 3 / Protonated ionic liquid absorbent. Put the above absorbent in the absorption tank, calculate the absorption capacity according to the...

Embodiment 2

[0032] The experimental device for synthesizing ionic liquids is mainly a three-necked flask with a condensing reflux tube on the top and a dropping funnel and a stirring device. Accurately weighed 30.9281g 3-aminopropanol is dissolved in anhydrous methanol and placed in the flask, and the stirrer is opened to stir, and under high-speed stirring, nitric acid solution (37.3803g, 69.41% ), the molar weight of nitric acid was equal to 3-amino propanol, and dripped in 60 minutes. And react at 50° C. for 6 hours. After the reaction was completed, the solvent and water were removed by rotary evaporation at 70° C. for 6 h to obtain the protonated ionic liquid of 3-aminopropanol nitrate.

[0033] The experimental device for synthesizing ionic liquids is mainly a three-necked flask with a condensing reflux tube on the top and a dropping funnel and a stirring device. Accurately weighed 21.3462g n-butylamine was dissolved in absolute methanol and placed in the flask, and the stirrer wa...

Embodiment 3

[0036]The experimental device for synthesizing ionic liquids is mainly a three-necked flask with a condensing reflux tube on the top and a dropping funnel and a stirring device. Accurately weighed 47.8964g 1-ethylimidazole was dissolved in anhydrous methanol and placed in the flask, and the stirrer was opened to stir, and under high-speed stirring, nitric acid solution (48.2992g, 65% ), the molar weight of nitric acid was equal to that of 1-ethylimidazole, and it was dripped within 75 minutes. And react at 45°C for 8 hours. After the reaction was completed, the solvent and water were removed by rotary evaporation at 70° C. for 6 h to obtain the protonated ionic liquid of 1-ethylimidazolium nitrate.

[0037] Accurately weigh 3mL of 1-ethylimidazole nitrate protonated ionic liquid into a single-necked bottle, add 2.0384g AgNO3, and stir magnetically at 60°C for 4h to obtain a mixed 4mol / L AgNO3 / 1-ethylimidazole protonated ionic liquid absorbent. Put the above absorbent in the...

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Abstract

The invention provides a metal salt-containing protonized ionic liquid absorbent and an application thereof. The absorbent contains a protonized ionic liquid as a solvent and metal silver salt as an olefin complexing carrier. By changing the types of cations of the protonized ionic liquid and chemical groups carried by the cations, mutual action of the silver salt and the ionic liquid and the dissociation degree of the silver salt can be regulated, and further the activity of silver salt separated olefin / alkane is regulated.

Description

technical field [0001] The invention belongs to the fields of gas separation and purification and the application of ionic liquids, and in particular relates to a protonated ionic liquid absorbent containing metal salts and its application. Background technique [0002] Unsaturated light hydrocarbons often play an important role in the chemical industry, and they are often used as the basic raw materials for the production of many products in the chemical industry. Light olefins are of great importance to the chemical synthesis industry as starting materials for the synthesis of many products. Among them, the ethylene industry has always played an important role in the national economy. The output and production level of ethylene is a sign to measure the development level of a country's petrochemical industry. About 80% of ethylene is used to produce ethylene oxide, dichloroethane, and vinyl chloride. And polyethylene, ethylene oxide is an important raw material for the pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14C07C7/11C07C11/04C07C11/06C07C11/16
CPCB01D53/1418B01D53/1487B01D53/1493B01D2252/30C07C7/11C07C11/04C07C11/06C07C11/16Y02P20/54
Inventor 张吕鸿窦浩桢杨娜姜斌徐咪
Owner TIANJIN UNIV
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