Method for extracting lithium from salt lake brine

A salt lake brine and extraction technology, applied in the chemical industry and extraction chemistry field, can solve the problems of solvent loss of extraction agent, strong corrosion of extraction equipment, and restrictions on large-scale industrial application, etc., to reduce concentration, improve strong corrosion, and simple operation reliable effect
CN104357677AInactive Publication Date: 2015-02-18QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
Publication Date
2015-02-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a method for extracting lithium from salt lake brine. The method comprises the following steps: adding HCl and FeCl3.6H2O to an extract water phase (an LiCl-MgCl2-H2O system), and controlling the ratio of amount of substances of iron and lithium to be 1.3 to 1; standing after fully mixing the extract water phase with an extract organic phase in a volume ratio of 1 to 2, and separating a liquid phase. By adopting the method, the problems that the corrosivity of high-concentration tributyl phosphate towards extraction equipment is stronger and the dissolution loss of an extracting agent in water is serious in long-term operation are solved, and the lithium extraction efficiency of the prior art is achieved. The extraction method is simple and reliable to operate.
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Description

technical field

[0001] The invention belongs to the technical fields of extraction chemistry and chemical industry, and in particular relates to a method for extracting lithium from salt lake brine by using a composite extractant. Background technique

[0002] Salt lake brine is rich in various minerals, among which is also an important source of lithium. my country is rich in salt lake brine lithium resources, and its reserves rank among the top in the world. However, salt lake brine contains a variety of metal ions, how to separate and extract lithium from it is an important topic of current research.

[0003] Lithium not only has important applications in the defense industry, but also has become increasingly important in the national economy, especially in the energy field: 6 Li and 7 Li is an important material for fuel in future nuclear fusion reactors and for nuclear fission reactions, respectively; it is also in increasing demand as a battery material. Therefore,...

Claims

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