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Extraction composition, extraction system and application of extraction composition

A composition and extraction technology, applied in the direction of improving process efficiency, etc., can solve the problems of insufficient extraction rate and back-extraction performance, strong corrosion of equipment, and complicated operation.

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

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to overcome the existing extraction systems and processes for extracting lithium salts from lithium-containing brines, such as lengthy process, cumbersome operation, strong corrosion to equipment, insufficient extraction rate and stripping performance, etc. Technical problem, and provide a kind of extraction composition, extraction system and its application

Method used

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  • Extraction composition, extraction system and application of extraction composition
  • Extraction composition, extraction system and application of extraction composition
  • Extraction composition, extraction system and application of extraction composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～ Embodiment 10

[0069] Organic phase: extractant + neutral phosphorus oxide compound + diluent

[0070] Aqueous phase: Lithium-containing brine

[0071] Phase (O:A) represents the volume ratio of the organic phase to the aqueous phase.

[0072] The specific operation is as follows:

[0073] A certain amount of FeCl 3 (Co-extraction agent) is added in lithium-containing brine, after shaking to make it dissolve, add organic phase, shake balance (oscillation time 5 minutes-30 minutes), leave standstill layering (obtain the organic phase containing lithium ion after equilibrium and water 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 11

[0075] Organic phase: extractant + neutral phosphorus oxide + diluent;

[0076] Water phase: Lithium-containing brine;

[0077] Compared (O:A): refers to the volume ratio of organic phase and aqueous phase;

[0078] The specific operation is as follows:

[0079] A certain amount of FeCl 3 (Co-extraction agent) was added in the organic phase, then added to the water phase, oscillating to balance (the oscillating time was 30 minutes), and standing to separate layers to obtain a balanced water phase and an organic phase containing lithium ions. Determination of Li in the equilibrium aqueous phase and organic phase, respectively + 、Na + 、K + and Mg2+ 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.

[0080] The experimental operation of Comparative Examples 1-4 is the same as that of Example 11.

[0081] The lithium-containing brine parameters of Example...

Embodiment 12

[0093] Embodiment 12 Stripping

[0094]

[0095] A certain amount of FeCl 3 (Co-extraction agent) add 60 parts (volume) lithium-containing brine (FeCl 3 Each component and content sees in embodiment 1,5,10 and comparative example 4) in consumption and lithium-containing brine, after shaking and making it dissolve, add in 30 parts (volume) embodiment 1,5,10 and comparative example 4 The organic phase was shaken for 10 minutes for extraction 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 6mol / L hydrochloric acid aqueous solution, shake at 25°C for 10 minutes, carry out back extraction, stand and separate the layers, and measure the Li in the two phases of back extraction equilibrium. + concentration. The specific parameters are shown in Table 4 below.

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Abstract

The invention discloses an extraction composition, an extraction system and application of the extraction composition. The extraction composition includes an extraction agent and a neutral phosphorusoxygen compound shown in the formula A. The extraction agent includes N,N-dihexyl propanamide but does not include N,N-di(2-ethylhexyl)acetamide. A mixture of an amide compound of a specific structureand the neutral phosphorus oxygen compound is selected as the extraction composition, and the extraction rate of Li of lithium containing brine can reach up to 91.03%; the lithium-magnesium distribution coefficient can reach up to 757.29; and when HCl is used for lithium reextraction, the reextraction rate is 84% or above, the extraction and reextraction performance of extracting lithium salt from the lithium containing brine is greatly improved, cost is reduced, and the extraction composite is more suitable for industrial production (Please see the formula in the specification).

Description

technical field [0001] The invention relates to an extraction composition, an extraction system and applications thereof. 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 metal ions, its comprehensive utili...

Claims

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Application Information

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IPC IPC(8): C22B3/40C22B26/12
CPCY02P10/20
Inventor 袁承业李晋峰
Owner SHANGHAI INST OF ORGANIC CHEMISTRY - CHINESE ACAD OF SCI
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