Functionalized ion liquid for lithium extraction, and synthesis method thereof

A technology of ionic liquid and synthesis method, applied in the direction of organic chemistry, improvement of process efficiency, etc., can solve the problem of high corrosion of equipment, and achieve the effect of reducing corrosion, feasible process and easy control of reaction

Active Publication Date: 2017-03-08
INST OF PHARMACY SHANDONG PROV ACAD OF MEDICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the existing extractant is too corrosive to the equipment, finding a new, mild extraction system or a substitute for an extractant is one of the most critical issues

Method used

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  • Functionalized ion liquid for lithium extraction, and synthesis method thereof
  • Functionalized ion liquid for lithium extraction, and synthesis method thereof
  • Functionalized ion liquid for lithium extraction, and synthesis method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Synthesis of 4-N, N, dimethyl-N'-bis(2-ethylhexyl)carbonylethylpyridine hexafluorophosphate:

[0044] Add 26.65g of diisooctylamine, 80ml of 1,2-dichloroethane and 12.12g of triethylamine into a 500ml three-necked flask, place the system in an ice-salt bath and drop it below zero, and add 11.2g of chlorine Acetyl chloride in 35 ml of 1,2-dichloroethane solution, the rate of addition was controlled to ensure that the reaction temperature was maintained within 10°C. After the dropwise addition, the reaction system was transferred to room temperature and reacted for 3 h.

[0045] Add 100ml of 1M hydrochloric acid solution dropwise to quench the experiment, let stand, separate the phases, and keep the organic phase; the organic phase was washed with 100ml of 1M sodium hydroxide solution, 100ml of water, and 100ml of saturated brine, and finally dried over anhydrous sodium sulfate. After suction filtration and spin-drying, the obtained product was dried in a vacuum drying o...

Embodiment 2

[0049] Synthesis of 4-N, N, dimethyl-N'-diethylcarbonylpropylpyridine hexafluorophosphate:

[0050] Add 25.42g of diethylamine, 70ml of 1,2-dichloroethane and 22.26g of triethylamine into a 500ml three-necked flask, place the system in an ice-salt bath and drop it below zero, and add 16.09g of 3- 48 ml of 1,2-dichloroethane solution of chloropropionyl chloride, the rate of addition is controlled to ensure that the reaction temperature is maintained within 10°C. After the dropwise addition, the reaction system was transferred to room temperature and reacted for 3 h.

[0051] Add 150ml of 1M hydrochloric acid solution dropwise to quench the experiment, let it stand, separate the phases, and keep the organic phase; the organic phase was successively washed with 150ml of 1M sodium hydroxide solution, 150ml of water, and 150ml of saturated saline, and finally dried with anhydrous sodium sulfate. After suction filtration and spin-drying, the obtained product was dried in a vacuum dry...

Embodiment 3

[0055] Synthesis of 4-N, N, dimethyl-N'-bis(2-ethylhexyl)carbonylpropylpyridine hexafluorophosphate:

[0056] Add 26.35g of diisooctylamine, 80ml of 1,2-dichloroethane and 12.35g of triethylamine into a 500ml three-necked flask, place the system in an ice-salt bath and drop it below zero, and add 12.73g of 3 - 35 ml of 1,2-dichloroethane solution of chloropropionyl chloride, the rate of addition is controlled to ensure that the reaction temperature is maintained within 10°C. After the dropwise addition, the reaction system was transferred to room temperature and reacted for 3 h.

[0057] Add 110ml of 1M hydrochloric acid solution dropwise to quench the experiment, let it stand, separate the phases, and keep the organic phase; the organic phase was successively washed with 110ml of 1M sodium hydroxide solution, 110ml of water, and 110ml of saturated brine, and finally dried over anhydrous sodium sulfate. After suction filtration and spin-drying, the obtained product was dried ...

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Abstract

The invention discloses a functionalized ion liquid for lithium extraction, and a synthesis method thereof, and belongs to the field of chemical synthesis. According to the method, halogenated acyl chloride, disubstituted amine, 4-N,N-dimethylpyridine and potassium hexafluorophosphate are adopted as raw materials, and an amidation reaction, a salt formation reaction and an exchange reaction are performed to obtain the functionalized ion liquid having the amide group. Compared to the functionalized ion liquid and the synthesis method thereof in the prior art, the functionalized ion liquid and the synthesis method thereof of the present invention have characteristics of simple operation, industrial application, important application value, and the like.

Description

technical field [0001] The invention relates to the field of chemical synthesis, in particular to a functionalized ionic liquid for lithium extraction and a synthesis method thereof. Background technique [0002] As a new strategic energy source, lithium is widely used in batteries, nuclear fusion power generation, aerospace, medicine and other fields. Lithium resources in nature are mainly solid ore and salt lake brine. my country's salt lake resource reserves are extremely rich, and the proven reserves in the Qaidam area alone have reached more than 20 million tons (LiCl). With the increasing market demand, the extraction of lithium from salt lake brine has important strategic significance. [0003] In salt lakes, lithium is mainly associated with alkali metals and alkaline earth metals such as sodium, magnesium, and potassium in the form of ions. It is very difficult to separate and extract lithium. It can be said that the efficient separation of lithium and magnesium ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D213/74C22B26/12C22B3/36
CPCC07D213/74C22B26/12C22B3/362Y02P10/20
Inventor 王延风张晓梅张平平路文娟周亚楠孟李阳
Owner INST OF PHARMACY SHANDONG PROV ACAD OF MEDICAL SCI
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