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Extraction system and application thereof

An extraction and system technology, applied to the improvement of process efficiency, etc., can solve the problems of small organic phase lithium loading, low extraction efficiency, and high acidity of back extraction

Active Publication Date: 2018-12-07
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

[0005] The technical problem actually solved by the present invention is to overcome the defects of low extraction efficiency, high acidity of stripping and small load of organic phase lithium in the existing method of recovering lithium from the lithium-containing solution of waste batteries, and to provide an extraction system and its application

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  • Extraction system and application thereof
  • Extraction system and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0063] Extraction system: extractant: 8-hydroxyquinoline 0.50mol / L; modifier: dioctylmethylsulfonium chloride 0.50mol / L; diluent: chloroform. Aqueous phase: Lithium-containing solution after wet treatment of waste batteries. Mainly contains: 0.20mol / L Li + , 0.50mol / L Na + ;0.30mol / L K + Plasma.

[0064] Extraction method: add a certain amount of KOH to the aqueous phase of the lithium-containing waste liquid, adjust the pH value to 13-14, compare the extraction system with the aqueous phase at a ratio of 1:1, and extract equilibrium after single-stage extraction contact for 3 minutes, and separate phases; use 2mol / L of hydrochloric acid is used as the stripping solution, and the lithium product is obtained after stripping. The concentration of lithium in the raffinate was 0.07mol / L. The single-stage extraction recovery of lithium was 65%.

Embodiment 2

[0066] Extraction system: extractant: 0.60 mol / L of 7-propyl-8-hydroxyquinoline; modifier: 0.80 mol / L of dinonylmethylsulfonium chloride; diluent: sulfonated kerosene. Water phase: Lithium-containing solution after wet treatment of waste batteries, mainly containing: 0.08mol / L Li + , 0.52mol / L Na + Plasma.

[0067] Extraction method: add a certain amount of NaOH to the aqueous phase of the lithium-containing waste liquid, adjust the pH value to 13-14, and compare the extraction system with the aqueous phase at a ratio of 1:1. After 3 minutes of single-stage extraction, the extraction is balanced and the phases are separated; use 0.5 The hydrochloric acid of mol / L is used as stripping solution, and lithium product is obtained after stripping. The concentration of lithium in the raffinate is 0.009mol / L. The single-stage extraction recovery of lithium was 89%.

Embodiment 3

[0069] Extraction system: extractant: 5,7-dichloro-8-hydroxyquinoline 0.30mol / L; modifier: trinonylmethylammonium chloride 0.30mol / L; diluent: dichlorobenzene. Water phase: Lithium-containing solution after wet treatment of waste batteries, mainly containing: 0.08mol / LLi + , 0.52mol / L Na + Plasma.

[0070] Extraction method: add a certain amount of NH to the aqueous phase of lithium-containing waste liquid 4 OH, adjust the pH value to >9, the extraction system is compared with the water phase at 1:1, the single-stage extraction is in contact for 3 minutes, the extraction is balanced, and the phases are separated; use 1.0mol / L hydrochloric acid as the stripping solution, and after stripping, get lithium products. The concentration of lithium in the raffinate is 0.015mol / L. The single-stage extraction recovery of lithium was 81%.

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Abstract

The invention discloses an extraction system and application thereof. The extraction system comprises a compound and a modifier shown in the formula (I), and the molar ratio of the compound shown in the formula (I) to the modifier shown in the formula (I) is 0.2:1-5:1. When the extraction system contains diluents, the application preferably comprises the following steps that an organic phase is used for extracting a lithium containing solution obtained after waste battery wet processing, and an organic phase loaded with lithium ions is obtained. According to the extraction system and the application thereof, the recycling rate of the extraction process is high, the balance time is short, reverse extraction and operation are easy, and good practicability and economical efficiency are achieved. Through the extraction system, rapid and efficient extraction of the lithium ions can be achieved; and as is shown in the embodiment, the single-level extraction recycling rate of the lithium canreach 89%, and the multi-level total recycling rate can reach 99%. The formula is shown in the specification.

Description

technical field [0001] The invention relates to an extraction system and its application. Background technique [0002] Lithium has the smallest atomic radius and is currently the lightest metal known. It has chemical and physical properties different from many other metal elements, so it has a wide range of uses. The application of lithium and its compounds involves glass, ceramics, medicine, smelting, refrigeration and other fields. Especially in the field of new energy, lithium is known as an "energy element". As an important raw material for lithium batteries, the global demand for lithium is rapidly increasing at a rate of 8-10% per year. Correspondingly, a large number of metal materials in used lithium-ion batteries need to be effectively recycled. At present, waste lithium-ion batteries are generally recycled by a wet process of metal leaching, purification and extraction of cobalt, nickel and manganese. In the process of extracting cobalt, nickel and manganese, m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B26/12C22B7/00C22B3/40
CPCC22B7/006C22B26/12C22B3/406Y02P10/20
Inventor 张伟张丽君郑卫琴胡金波
Owner SHANGHAI INST OF ORGANIC CHEM CHINESE ACAD OF SCI
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