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Method for preparing lithium carbonate from lithium phosphate

A lithium phosphate and lithium carbonate technology, applied in lithium carbonate;/acid carbonate, chemical instruments and methods, phosphorus compounds, etc., can solve the danger of long-term storage, difficulty in direct use, toxicity of lithium phosphate, etc. problems, to achieve the effect of easy control, easy separation, and less loss

Inactive Publication Date: 2017-05-31
天津二八科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lithium phosphate has certain toxicity, if it is not utilized and consumed, its long-term storage is also dangerous
In addition, lithium phosphate is not easily soluble in water, making it difficult to be directly utilized

Method used

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Examples

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Embodiment Construction

[0021] The present invention will be further elaborated and illustrated below in conjunction with production examples.

[0022] The practical application technical scheme of the present invention is: cleaning-dissolving-removing impurities-precipitating lithium-raising phosphorus-recovering

[0023] Step 1: Cleaning: Add 120Kg lithium phosphate to 1m 3 In water, gradually heat to a water temperature of 60°C, stir while heating, then separate the upper liquid to remove impurities such as Na, K, and Cl dissolved in water. Add another 1m 3 Water is used for a second wash to remove most of the water-soluble impurities.

[0024] Step 2: Dissolving: Slowly add 1m to the cleaned lithium phosphate 3 10% dilute hydrochloric acid, and keep stirring until the lithium phosphate is completely dissolved to obtain a lithium-containing solution.

[0025] Step 3: Impurity removal: Heat the lithium-containing solution to 80°C, and add an appropriate amount of saturated NaOH solution, so tha...

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PUM

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Abstract

The invention provides a method for preparing lithium carbonate from lithium phosphate. According to the technical scheme, the method comprises steps as follows: cleaning, dissolution, impurity removal, lithium settlement, extraction of a phosphate product and recovery. During production, lithium elements are cyclically utilized, the loss is low, the yield is high, and the produced lithium carbonate has high purity and good quality and can reach the battery level. A large quantity of harmful chemical waste lithium phosphate can be utilized, and lithium carbonate urgently needed in the market can be produced.

Description

technical field [0001] The invention relates to a method for preparing lithium carbonate by using lithium phosphate. Background technique [0002] With the development of lithium battery new energy vehicles, the value of lithium has been redefined, and the price of lithium carbonate has also been soaring. This makes some chemical wastes with low lithium content and difficult to extract be paid attention to, including lithium phosphate. Lithium phosphate has certain toxicity, and if it is not utilized and consumed, its long-term storage is also dangerous. In addition, lithium phosphate is not easily soluble in water, making it difficult to be directly utilized. At present, there are only a small amount of applications in industries such as medicine, catalysts and test reagents. It can be seen that the industrial utilization of lithium phosphate is very necessary. Contents of the invention [0003] The invention provides a method for preparing lithium carbonate by utilizi...

Claims

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Application Information

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IPC IPC(8): C01D15/08C01B25/32
CPCC01D15/08C01B25/325C01P2006/80
Inventor 焦明月焦明伟
Owner 天津二八科技股份有限公司
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