Method for preparing nano lithium carbonate

A lithium carbonate and nano technology, applied in the direction of nano technology, nano technology, nano structure manufacturing, etc., to achieve the effect of convenient operation, simple equipment and narrow particle size distribution range

Active Publication Date: 2011-09-14
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are no reports on the patents and articles on the preparation of nano-lithium carbonate by using this reactor.

Method used

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  • Method for preparing nano lithium carbonate
  • Method for preparing nano lithium carbonate
  • Method for preparing nano lithium carbonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Adjust the rotating speed of the rotating packed bed to 1000r·min -1 , The 4.0mol·L -1 Lithium hydroxide and 0.1g·L -1 The mixed solution of sodium lauryl sulfate is 0.1L·min -1 The speed is input to the rotating packed bed through the metering pump, and at the same time, the speed is 4.0L·min -1 Enter carbon dioxide gas at a flow rate of 40°C. The reaction temperature is 40°C. The raw material solutions are quickly and fully mixed under the action of large centrifugal force. The reaction crystallizes to produce nano-lithium carbonate particles. The reacted mixture is discharged from the discharge port of the rotating packed bed, and is Dry in an oven at 200°C for 2 hours to obtain nano-scale lithium carbonate with a particle size of 10-30 nm. The X-ray diffraction photos of the prepared nano-lithium carbonate are as follows figure 2 Shown.

Embodiment 2

[0032] Adjust the rotating speed of the rotating packed bed to 1500r·min -1 , Add 2.0mol·L -1 Lithium hydroxide and 0.05g·L -1 The mixed solution of sodium dodecyl sulfonate is 2.0L·min -1 The speed is inputted into the rotating packed bed through the metering pump, and 2.0mol·L -1 The reaction temperature is 60℃. The raw material solution is quickly and fully mixed under the action of large centrifugal force. The reaction crystallizes to generate nano-lithium carbonate particles. The reacted mixture is discharged from the discharge port of the rotating packed bed, and is filtered and washed. Dry in an oven at 300°C for 10 hours to obtain nano-scale lithium carbonate with a particle size of 50-80 nm.

Embodiment 3

[0034] Adjust the rotating speed of the rotating packed bed to 3000r·min -1 , 1.5mol·L -1 Lithium chloride and 0.1g·L -1 The mixed solution of polyethylene glycol is 1.0L·min -1 The speed is inputted into the rotating packed bed through the metering pump, and 3.0mol·L -1 The reaction temperature is 30℃. The raw material solution is quickly and fully mixed under the action of large centrifugal force. The reaction crystallizes to generate nano-lithium carbonate particles. The reacted mixture is discharged from the discharge port of the rotating packed bed, filtered and washed Then, it was dried in an oven at 250° C. for 4 hours to obtain nano-scale lithium carbonate with a particle size of 60-80 nm.

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Abstract

The invention discloses a method for preparing nano lithium carbonate in the technical field of nano lithium carbonate preparation. The method comprises the following steps: preparing water-soluble lithium salt or lithium hydroxide, water and a water-soluble dispersing agent into a mixed solution; then spraying and dispersing the mixed solution to porous aggregate in the annular filling area of arotary filling bed, simultaneously introducing CO2 or a water-soluble carbonate solution, and rapidly and completely mixing under the action of centrifugal force; discharging nano lithium carbonate particles generated by reaction crystallization out of the discharge hole of the rotary filling bed along with the mixed solution; and filtering, washing and drying so as to obtain nano lithium carbonate powder. In the method, a rotary filling bed reactor is used and has the advantages of simple equipment, small volume and small energy consumption, and reaction is carried out at normal pressure, thus the preparation cost is low. The method has the characteristics that the process is simple, the operation is convenient, the production efficiency is high, side reactions and toxic and harmful substances are not generated in the reaction process, and the method is environmental-friendly. The prepared nano lithium carbonate has the advantages of stable components, uniform particle size and narrow particle size distribution range.

Description

Technical field [0001] The invention belongs to the technical field of nano lithium carbonate preparation, and particularly relates to a method for preparing nano lithium carbonate. Background technique [0002] Lithium carbonate is an important raw material in the electronics industry, batteries, pharmaceuticals, aluminum smelting, ceramics, glass and other industries. It is also the main raw material for the production of lithium-ion battery cathode materials. High purity Li 2 CO 3 It is a necessity in the magnetic material industry, atomic energy industry, electronics industry and optical instrument industry. my country is a country with large reserves of lithium resources, among which the reserves of brine lithium resources are extremely rich, but the salt lake brine is restricted by its own conditions, and most of the primary lithium industrial products are technical grade Li 2 CO 3 . With the maturity of the technology of extracting lithium from brine, the development cos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D15/08B82B3/00
Inventor 蒲薇华武玉玲任建国何向明李建军高剑万春荣姜长印
Owner TSINGHUA UNIV
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