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Method for increasing direct yield of battery-grade lithium carbonate prepared from brine

A lithium carbonate, battery-grade technology, applied in the field of improving the direct yield of battery-grade lithium carbonate prepared from brine, can solve the problems of large lithium loss, high extraction cost, and reduced practicability, and achieve reduced loss and low operating costs , the effect of reducing the labor force

Inactive Publication Date: 2021-02-02
萍乡市拓源实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to public literature reports, more than 60% of the lithium resources in the world are distributed in salt lake brines. Sulfate type salt lake brines, especially magnesium sulfate subtype brines, are the most representative of all boron-containing and lithium-containing salt lakes. The reserves of lithium resources in the world account for about 30% of the total reserves in the world, but the direct recovery rate of the existing method for preparing battery-grade lithium carbonate from brine is low, which not only makes the loss of lithium larger, but also leads to high extraction costs, which greatly reduces the Practicality, for this reason, we provide a kind of method that improves the direct yield of brine preparation battery grade lithium carbonate

Method used

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  • Method for increasing direct yield of battery-grade lithium carbonate prepared from brine

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Effect test

Embodiment 1

[0024] see figure 1 , the present invention provides a kind of technical scheme: a kind of method that improves the direct yield of brine preparation battery grade lithium carbonate, specifically comprises the following steps:

[0025] S1. Preparation work: first prepare the brine, containers, additives and tools that need to be used, and check whether there are any omissions. After the inspection, proceed to the next step. in clean condition.

[0026] S2. Stirring treatment: add brine and aluminum chloride into the container, and then carry out uniform stirring and mixing treatment by a stirrer. The stirring time is 1 hour, and then take the precipitate to obtain the first mixed solution. In S2, the molar ratio is chlorinated The molar ratio of aluminum to lithium in the brine is 2:1.

[0027] S3. One-time magnesium removal: Add sodium carbonate to the obtained mixed liquid, and then stir it with a stirrer for 5 minutes. After the stirring is completed, the second mixed sol...

Embodiment 2

[0038] see figure 1 , the present invention provides a kind of technical scheme: a kind of method that improves the direct yield of brine preparation battery grade lithium carbonate, specifically comprises the following steps:

[0039] S1. Preparation work: first prepare the brine, containers, additives and tools that need to be used, and check whether there are any omissions. After the inspection, proceed to the next step. in clean condition.

[0040] S2. Stirring treatment: add brine and aluminum chloride into the container, and then carry out uniform stirring and mixing treatment by a stirrer. The stirring time is 2 hours, and then take the precipitate to obtain the first mixed solution. In S2, the molar ratio is chlorinated The molar ratio of aluminum to lithium in the brine is 6:1.

[0041] S3. One-time removal of magnesium: add sodium carbonate to the obtained mixed liquid, and then stir it with a stirrer for 10 minutes. After the stirring is completed, the second mixe...

Embodiment 3

[0052] see figure 1 , the present invention provides a kind of technical scheme: a kind of method that improves the direct yield of brine preparation battery grade lithium carbonate, specifically comprises the following steps:

[0053] S1. Preparation work: first prepare the brine, containers, additives and tools that need to be used, and check whether there are any omissions. After the inspection, proceed to the next step. in clean condition.

[0054] S2. Stirring treatment: add brine and aluminum chloride into the container, and then carry out uniform stirring and mixing treatment by a stirrer. The stirring time is 1.5 hours, and then take the precipitate to obtain the first mixed solution. In S2, the molar ratio is chlorinated The molar ratio of aluminum to lithium in the brine is 4:1.

[0055] S3. One-time magnesium removal: Add sodium carbonate to the obtained mixed liquid, and then stir it with a stirrer for 8 minutes. After the stirring is completed, the second mixed ...

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Abstract

The invention discloses a method for improving the direct recovery rate of battery-grade lithium carbonate prepared from brine, which specifically comprises the following steps: S1, preparation: firstly, preparing brine, a container, an additive and a tool which need to be used, checking whether omission exists or not, and carrying out the next operation after the checking is finished, and S2, stirring treatment: adding brine and aluminum chloride into the container, then uniformly stirring and mixing by virtue of a stirrer for 1-2h, and then taking precipitate, so as to obtain a first mixed solution,compared with the prior art. The method disclosed by the invention has the beneficial effects that the loss amount of lithium ions is greatly reduced, the extraction cost is reduced, the equipment requirement is relatively small, the required equipment is relatively simple and convenient, the operation convenience is greatly improved, the labor force is reduced, and meanwhile, the direct recovery rate of lithium is greater than 90%, in addition, due to the fact that the operation cost is low, energy consumption is greatly reduced, the purity of the prepared product is high, and great convenience is brought to users.

Description

technical field [0001] The invention relates to the technical field of brine utilization, in particular to a method for improving the direct yield of battery-grade lithium carbonate prepared from brine. Background technique [0002] Salt lakes usually refer to lakes with a salt content greater than 50g L-1. The lake contains a large amount of Cl-, SO42-, HCO3-, CO32-, Na+, K+, Mg+, Li+ ions, and the salt content exceeds 24.7‰. It is an important raw material for the production of various industrial and agricultural products. As the amount of lithium used in traditional applications continues to grow, people are also continuing to develop new applications, and the demand for lithium resources is also increasing. As a new type of energy and strategic resource, lithium has attracted much attention in the 21st century. Lithium resources in China's salt lakes account for about 85% of the total industrial reserves of lithium resources. This strength determines that lithium extra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D15/08C01F5/24C01F5/22
CPCC01D15/08C01F5/24C01F5/22C01P2006/80
Inventor 莫美荣
Owner 萍乡市拓源实业有限公司