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Lithium precipitation and crystallization method for preparing snowflake-shaped monocrystalline high-purity lithium carbonate

A high-purity lithium carbonate, lithium carbonate technology, applied in the direction of lithium carbonate; / acid carbonate, etc., can solve the problem that lithium carbonate cannot form a snowflake-like single crystal large granular structure, easy to agglomerate, agglomerate, agglomerate, etc. It is beneficial to precipitation and separation, not easy to agglomerate, and the crystal lattice size is large.

Active Publication Date: 2020-07-28
江西南氏锂电新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Simultaneously adopt the lithium carbonate prepared by the above-mentioned existing process method, on the one hand, the prepared lithium carbonate crystal lattice particle size is less, if the time is slightly longer in the storage and stacking link, it is very easy to agglomerate, agglomerate, and agglomerate The second is that the preparation process is longer, which increases its preparation cost accordingly, and the purity of the prepared lithium carbonate is not high, and the crystal structure of the prepared lithium carbonate cannot form a snowflake-like single crystal large granular structure

Method used

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  • Lithium precipitation and crystallization method for preparing snowflake-shaped monocrystalline high-purity lithium carbonate
  • Lithium precipitation and crystallization method for preparing snowflake-shaped monocrystalline high-purity lithium carbonate
  • Lithium precipitation and crystallization method for preparing snowflake-shaped monocrystalline high-purity lithium carbonate

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Embodiment 1

[0062] Points not described in the following examples are the same as those described above.

[0063] Concrete process method step and the control of technical parameter are as follows:

[0064] A lithium precipitation and crystallization method for preparing snowflake-shaped single crystal high-purity lithium carbonate disclosed by the invention uses lithium solution as a raw material; it comprises the following method steps,

[0065] 1) prepare standard sodium carbonate solution, add pure water together in reaction device or be called reactor device, so-called pure water can be deionized water, heat under constant stirring, add sodium carbonate, constant temperature is 80 ℃; Prepare sodium carbonate saturated solution under this constant temperature condition, the stirring velocity of the reactor of control reaction unit is 60 revs / min; The concentration of the standard sodium carbonate solution that controls making is 260g / L; Be standard sodium carbonate solution;

[0066]...

Embodiment 2

[0080] Explanation of the technical terms in the description of the present invention:

[0081] (1) Lithium solution: refers to the compound solution containing lithium. That is to say, the lithium-containing solution obtained in the lithium extraction process, the lithium solution of the present invention is lithium-containing compound solutions such as lithium sulfate, lithium chloride or lithium phosphate;

[0082] (2) Snowflake-like single-crystal high-purity lithium carbonate or snowflake-like single-crystal large-grained lithium carbonate: Lithium carbonate has a single-crystal structure, and its crystal structure microscopic appearance resembles snowflakes, and the average grain size is larger than the conventional grain size. Therefore, it is named "snowflake-shaped" single crystal large particle lithium carbonate or snowflake-shaped single crystal high-purity lithium carbonate;

[0083] (3) Lithium carbonate adsorption mother nucleus: Suspend the ultrafine powder lithi...

Embodiment 3

[0107] Explanation of the technical terms in the description of the present invention:

[0108] (1) Lithium solution: refers to the compound solution containing lithium. That is to say, the lithium-containing solution obtained in the lithium extraction process, the lithium solution of the present invention is lithium-containing compound solutions such as lithium sulfate, lithium chloride or lithium phosphate;

[0109] (2) Snowflake-like single-crystal high-purity lithium carbonate or snowflake-like single-crystal large-grained lithium carbonate: Lithium carbonate has a single-crystal structure, and its crystal structure microscopic appearance resembles snowflakes, and the average grain size is larger than the conventional grain size. Therefore, it is named "snowflake-shaped" single crystal large particle lithium carbonate or snowflake-shaped single crystal high-purity lithium carbonate;

[0110] (3) Lithium carbonate adsorption mother nucleus: Suspend the ultrafine powder lit...

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Abstract

The invention discloses a lithium precipitation and crystallization method for preparing snowflake-shaped monocrystalline high-purity lithium carbonate. A lithium solution generated in the lithium extraction process is used as a raw material, and the method comprises the following steps: (1) preparing a standard sodium carbonate solution, (2) preparing a lithium carbonate adsorption mother nucleus, (3) preparing a lithium carbonate crystal-forming solution, and (4) preparing snowflake-shaped monocrystalline high-purity lithium carbonate, the purity of the prepared lithium carbonate reaches 99.8% or above, and the prepared lithium carbonate crystal is of a snowflake-shaped monocrystalline large granular structure. The method realizes one-step preparation of high-purity lithium carbonate, and has the advantages of short process, simple operation, continuous production and low cost. The production process is simple.

Description

Technical field: [0001] The invention relates to a lithium precipitation crystallization method for high-purity lithium carbonate, in particular to a lithium precipitation crystallization method for preparing snowflake-shaped single crystal high-purity lithium carbonate. Background technique: [0002] As the world's energy becomes increasingly tense, the development and utilization of new energy has become a common topic in the world. Lithium battery new energy, as one of the important industries for the development of new energy, has been paid more and more attention by various countries. "Lithium is the Energy Element of the 21st Century". Lithium carbonate is an important chemical raw material. With the introduction of the national new energy development plan, the development and utilization of new energy are encouraged; Lithium carbonate is an important basic raw material for the development of lithium battery new energy, which is widely used in automobiles and industria...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D15/08
CPCC01D15/08C01P2004/30C01P2006/80
Inventor 南进喜王家前吴进方刘剑叶
Owner 江西南氏锂电新材料有限公司
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