Application of amide compound, extraction composition containing amide compound and extraction system

A composition and extraction technology, applied in the direction of improving process efficiency, can solve the problems of long process, strong corrosion of equipment, large solvent loss of extractant, etc.

Active Publication Date: 2018-01-23
SHANGHAI INST OF ORGANIC CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is that, in order to overcome the shortcomings of the existing extraction system and process for extracting lithium salt from lithium-containing brine, the process is lengthy, the operation is cumbersome, the equipment is highly corrosive, and the extraction agent is greatly dissolved. , and provides an application of amide compounds, an extraction composition containing it and an extraction system

Method used

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  • Application of amide compound, extraction composition containing amide compound and extraction system
  • Application of amide compound, extraction composition containing amide compound and extraction system
  • Application of amide compound, extraction composition containing amide compound and extraction system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0068] Organic phase: N,N-dihexyl n-butyramide + diluent

[0069] Water phase: Lithium-containing brine;

[0070] Compared (O:A): refers to the volume ratio of organic phase and aqueous phase;

[0071] The specific operation is as follows:

[0072] A certain amount of FeCl 3 (co-extraction agent) is added in lithium-containing brine, shakes to dissolve it, then adds organic phase, oscillates to balance (oscillation time is 5 minutes to 30 minutes), stands and separates, and obtains a balanced water phase and an organic phase containing lithium ions. Mutually. Determination of Li in the equilibrium aqueous phase and organic phase, respectively + 、Na + 、K + and Mg 2+ Concentration, from which to calculate the extraction rate of Li, Li + , Mg 2+ 、Na + and K + The distribution ratio of Li / Mg, Li / Na, and Li / K separation coefficients.

Embodiment 4

[0074] Organic phase: N,N-dihexyl n-butyramide

[0075] Water phase: Lithium-containing brine;

[0076] Compared (O:A): refers to the volume ratio of organic phase and aqueous phase;

[0077] The specific operation is as follows:

[0078] A certain amount of FeCl 3 (Co-extraction agent) was added to the lithium-containing brine, shaken to dissolve it, then added to the organic phase, oscillated for 30 minutes, and allowed to stand for stratification to obtain a balanced aqueous phase and an organic phase containing lithium ions. Determination of Li in the equilibrium aqueous phase and organic phase, respectively + 、Na + 、K + and Mg 2+ Concentration, from which to calculate the extraction rate of Li, Li + , Mg 2+ 、Na + and K + The distribution ratio of Li / Mg, Li / Na, and Li / K separation coefficients.

[0079] The content of each ion in the lithium-containing brine in the above-mentioned Examples 1-4 is as shown in Table 1:

[0080] The content (mol / L) of each ion in ...

Embodiment 5

[0097]

[0098] A certain amount of FeCl 3 (Co-extraction agent) add 60 parts (volume) lithium-containing brine (FeCl 3 See Example 1 and 4) for each component and content in the lithium-containing brine. After shaking to dissolve it, add 30 parts (volume) of the organic phase in Example 1 and 4, vibrate for 10 minutes, and extract to obtain An organic phase loaded with lithium ions. Mix 30 parts (volume) of the organic phase loaded with lithium ions with 1 part (volume) of a 6mol / L aqueous hydrochloric acid solution, shake at 24°C for 10 minutes, carry out back extraction, stand and separate the layers, and measure the Li in the two phases in the equilibrium two phases of the back extraction. + Concentration, the specific parameters are shown in Table 5 below, and the specific conditions and parameters of the stripping in Comparative Examples 2 and 3 are detailed in the patent CN103055539A.

[0099] Table 5. Stripping result data table

[0100]

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Abstract

The invention discloses application of an amide compound, an extraction composition containing the amide compound and an extraction system. The extraction composition contains N,N-dicyclohexyl-butyramide and a diluents, but does not contain neutral phosphorus oxide as shown in the formula A. According to the amide compound or the extraction composition containing the amide compound, the extractionand back-extraction of lithium from Lithium-containing brine can be performed, the Lithium extraction rate of Lithium-containing brine is above 83.89%, and the distribution coefficient of Lithium-Magnesium is above 521; and when back-extraction of lithium is performed by the adoption of HCl, the back-extraction rate is above 91.74%, the corrosion to equipment is small, and the application of theamide compound, the extraction composition and the extraction system are suitable for industrial operation requirements (Please see the formula A in the specification.).

Description

technical field [0001] The invention relates to the application of an amide compound, an extraction composition containing the same and an extraction system. Background technique [0002] Lithium not only has important applications in the defense industry, but its importance in the national economy is also becoming increasingly evident, especially in the energy field: 6 Li and 7 Li is an important material for the fuel of future nuclear fusion reactors and for nuclear fission reactions, respectively: it is also in increasing demand as a battery material. Therefore, lithium is known as "the energy metal of the 21st century". The demand for lithium continues to grow at home and abroad, so the research, development and utilization of lithium resources are imminent. [0003] Salt lake brine is an important resource of lithium. my country is rich in salt lake brine lithium resources, and its reserves rank among the top in the world. However, since brine contains a variety of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/32C22B26/12
CPCY02P10/20
Inventor 袁承业李晋峰
Owner SHANGHAI INST OF ORGANIC CHEM CHINESE ACAD OF SCI
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