Lithium hydroxide mother liquor for removing calcium ions in intermediate material lithium sulfate solution and method thereof

A lithium hydroxide and lithium sulfate technology, which is applied in the field of industrial lithium salt production, can solve problems such as excessive calcium ions and affecting the quality of lithium hydroxide products

Pending Publication Date: 2020-10-27
BLOSSOM LITHIUM IND SICHUAN
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The intermediate process product lithium sulfate solution in the above process contains a large amount of calcium ions, re

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Lithium hydroxide mother liquor for removing calcium ions in intermediate material lithium sulfate solution and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A lithium hydroxide mother liquor for removing calcium ions in the intermediate material lithium sulfate, said lithium hydroxide mother liquor comprises the following components by mass percentage, lithium hydroxide monohydrate 13.5g / l, sodium hydroxide 1.8g / l, lithium sulfate 2.8g / l, sodium sulfate 2.3g / l, the rest is water.

[0028] Lithium hydroxide mother liquor 200ml is added to lithium sulfate solution, and calcium ion concentration is 150ppm in lithium sulfate solution, stirs while adding, and the pH value of regulating lithium sulfate solution 1450ml is 11.5, and the sulfate ion in lithium hydroxide mother liquor and lithium sulfate Calcium ions in the solution produced 0.09 g of calcium sulfate precipitate, which was removed with 108c type filter cloth.

[0029] After the above treatment, the content of calcium ions in the lithium sulfate solution was 20ppm.

Embodiment 2

[0031] A lithium hydroxide mother liquor for removing calcium ions in the intermediate material lithium sulfate, said lithium hydroxide mother liquor comprises the following components by mass percentage, lithium hydroxide monohydrate 16.5g / l, sodium hydroxide 2.8g / l, lithium sulfate 4.2g / l, sodium sulfate 3.8g / l, and the rest is water.

[0032] Lithium hydroxide mother liquor 250ml is added to lithium sulfate solution, and calcium ion concentration is 260ppm in lithium sulfate solution, stirs while adding, and the pH value of regulating lithium sulfate solution 2350ml is 12.5, and the sulfate ion in lithium hydroxide mother liquor and lithium sulfate Calcium ions in the solution produced 0.13 g of calcium sulfate precipitate, which was removed with 108c type filter cloth.

[0033] After the above treatment, the content of calcium ions in the lithium sulfate solution was 24ppm.

Embodiment 3

[0035] A lithium hydroxide mother liquor for removing calcium ions in the intermediate material lithium sulfate, said lithium hydroxide mother liquor comprises the following components by mass percentage, lithium hydroxide monohydrate 19.5g / l, sodium hydroxide 4.2g / l, sulfuric acid Lithium 5.3g / l, sodium sulfate 4.5g / l, the rest is water.

[0036] Lithium hydroxide mother liquor 300ml is added to lithium sulfate solution, and calcium ion concentration is 310ppm in lithium sulfate solution, stirs while adding, and the pH value of regulating lithium sulfate solution 3150ml is 12.0, and the sulfate ion in lithium hydroxide mother liquor and lithium sulfate Calcium ions in the solution produced 0.22 g of calcium sulfate precipitate, which was removed with 108c type filter cloth.

[0037] After the above treatment, the content of calcium ions in the lithium sulfate solution was 21ppm.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a lithium hydroxide mother liquor for removing calcium ions in an intermediate material lithium sulfate solution and a method thereof. The lithium hydroxide mother liquor comprises the following components by mass percentage: 8%-10% of lithium hydroxide monohydrate, 1%-2% of sodium hydroxide, 3%-5% of lithium sulfate, 2%-3% of sodium sulfate, and the balance water. The specific operation method comprises the following steps of: adjusting the pH value of the lithium sulfate solution to 11-12 by using the lithium hydroxide mother liquor, generating calcium sulfate precipitate by sulfate ions in the lithium hydroxide mother liquor and calcium ions in the lithium sulfate solution, and filtering out the calcium sulfate precipitate. According to the technical scheme, thelithium hydroxide mother liquor is adopted as a removing agent for removing calcium ions in the lithium sulfate solution, the components forming the mother liquor mixed liquor and the proportion of the components are verified and compared through an actual process, a good effect on removing the calcium ions is achieved, and no extra operation procedure is added to the process.

Description

technical field [0001] The invention relates to industrial lithium salt production, in particular to a lithium hydroxide mother liquor for removing calcium ions in an intermediate material lithium sulfate solution and a method thereof. Background technique [0002] Lithium is an important strategic material and an indispensable raw material for modern high-tech products. my country's proven total reserves of lithium resources rank second in the world, but lithium production only accounts for about 5% of the global total, and China is an importer of lithium products. [0003] At the same time, lithium-related products such as lithium-ion batteries are used in new energy vehicles, and high-nickel and high-energy-density positive electrode materials have become a development trend. Currently, high-nickel positive electrode materials generally use lithium hydroxide as a raw material. Compared with lithium carbonate, hydrogen The advantages of lithium oxide in terms of crystal s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C01D15/06
CPCC01D15/06
Inventor 雷浪孟岩王文洪高青健邓勇邓雅杰
Owner BLOSSOM LITHIUM IND SICHUAN
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap