Lithium salt crystallization method

By using an ultrasonic generator during the lithium salt crystallization process, the problems of uneven lithium salt particle size and impurity encapsulation were solved, achieving ultra-fine and uniform lithium salt particles, improving product quality and reducing equipment scaling.

CN120964849APending Publication Date: 2025-11-18SICHUAN YOULI JINCE TECHNOLOGY CO LTD
0 Cites 0 Cited by

Patent Information

Application Number
CN202411820492.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-11
Publication Date
2025-11-18

AI Technical Summary

Technical Problem

In existing lithium salt production processes, lithium salt particles have uneven particle size distribution, severe impurity encapsulation, and frequent equipment scaling, which affects product quality and production efficiency.

Method used

In the lithium salt crystallization process, two layers of ultrasonic generators are installed in the reactor. By utilizing the principle of ultrasonic cavitation, the ultrasonic frequency and molar ratio are controlled to perform reverse addition precipitation of lithium, thereby achieving ultrafine and uniform lithium salt particles.

Benefits of technology

This resulted in a narrower and more uniform lithium salt particle size distribution, a significant reduction in impurity content, a near-complete elimination of equipment scaling issues, and improved product quality.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention discloses a lithium salt crystallization method, which adopts a lithium precipitation kettle with two layers of ultrasonic generators arranged at diagonal positions in a kettle body, and comprises the following steps: starting the ultrasonic generators, and adjusting the ultrasonic frequency to be 20-150KHz; adding sodium carbonate and a lithium sulfate solution into the lithium precipitation kettle by adopting an inverse addition method; continuously carrying out ultrasonic reaction for 2-4 hours, and turning off the ultrasonic generator; and carrying out solid-liquid separation to obtain lithium carbonate. According to the invention, the scaling phenomenon in the reaction kettle can be basically eliminated completely, and scale blocks do not need to be cleaned manually; the content of impurities in the lithium salt is reduced: the content of sulfate radicals is reduced to 0.07% or below from 0.08% in the prior art and can be reduced to 0.045%, and the content of sodium ions is reduced to 0.02% or below from 0.025% in the prior art and can be reduced to 0.01% or below; and the particle size of the lithium salt crystal particles is reduced from the average particle size of 25-40 microns in the existing process to 3-20 microns in the process disclosed by the invention, and the appearance of the particles is more uniform.
Need to check novelty before this filing date? Find Prior Art