Supercharge Your Innovation With Domain-Expert AI Agents!

LiPF6 production process and LiPF6 production system

A production process and product technology, applied in the direction of alkali metal compounds, inorganic chemistry, lithium compounds, etc., can solve the problems of undisclosed lithium hexafluorophosphate product purity and high cost of lithium hexafluorophosphate products, and achieve reduced gas separation and purification costs, low production costs, high The effect of uniformity

Active Publication Date: 2020-01-14
SINOCHEM LANTIAN +2
View PDF9 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the highest yield of lithium hexafluorophosphate product in this patent application is only 98.5%, and pure phosphorus pentafluoride gas is used, the cost is high, and the specific purity of lithium hexafluorophosphate product and how to improve the quality of lithium hexafluorophosphate product are not disclosed.

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
  • LiPF6 production process and LiPF6 production system
  • LiPF6 production process and LiPF6 production system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] The phosphorus pentachloride is transported to the phosphorus pentafluoride generator 2 with cooling jacket and stored in hydrogen fluoride through the solid conveyor 1 with a metering device. The temperature is controlled at about 0°C, and the phosphorus pentachloride is mixed with Hydrogen fluoride reacts to produce phosphorus pentafluoride and hydrogen chloride. The mixed gas of phosphorus pentafluoride, hydrogen chloride and entrained hydrogen fluoride gas is passed into the first microchannel reactor 3 to form the first feed stream. Add hydrogen fluoride into the dissolution tank with cooling jacket and agitator, and add lithium fluoride into the dissolution tank with a solid feeding device while cooling, control the dissolution temperature to be about 0°C, and the mass fraction of lithium fluoride to be 2wt% . The hydrogen fluoride solution dissolved in lithium fluoride is transported into the first microchannel reactor 3 by a pump to form the second feed stream....

Embodiment 2

[0058] The difference between embodiment 2 and embodiment 1 production process is: the reaction temperature of the first microchannel reactor is 5 ℃, and the residence time is 10 seconds, and the reaction temperature of the second microchannel reactor is 8 ℃, and the residence time is 10 seconds .

[0059] After testing, the purity of the generated lithium hexafluorophosphate crystals is 99.994%, the yield is 99.8%, the particle size of crystal particles above 85% (wt) is 0.2-0.3mm, and the particle size of crystal particles above 93% (wt) is 0.18-0.35 mm.

Embodiment 3

[0061]The difference of embodiment 3 and embodiment 2 production technology is: the mol ratio of phosphorus pentafluoride and lithium fluoride is 2.5:1 in the first microchannel reactor, phosphorus pentafluoride and fluoride in the second microchannel reactor The molar ratio of lithium is 1:1.1.

[0062] After testing, the purity of the generated lithium hexafluorophosphate crystals is 99.995%, the yield is 99.8%, the particle size of crystal particles above 85% (wt) is 0.2-0.3mm, and the particle size of crystal particles above 94% (wt) is 0.18-0.35mm.

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

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to a LiPF6 production process and a LiPF6 production system. According to the process, a first feeding stream containing PF5 and a second feeding stream containing LiF and HF areintroduced into a first micro-channel reactor; the gas part in the product of the first micro-channel reactor is introduced into a second micro-channel reactor, and reacts with a third feeding streamcontaining LiPF6, LiF and HF; and the liquid part in the product of the first micro-channel reactor is crystallized and dried to obtain LiPF6. According to the invention, the prepared LiPF6 has advantages of high purity, uniform particle size, high product quality stability and the like, and is suitable for being used as a lithium ion battery electrolytic solution component.

Description

technical field [0001] The invention relates to the field of new energy technology, in particular to the field of lithium-ion battery electrolyte. Background technique [0002] Lithium hexafluorophosphate (LiPF6) is a white crystalline powder that is a major component of commercial lithium-ion battery electrolytes. Lithium hexafluorophosphate makes the battery have high energy density, high cycle capacity, low self-discharge rate, long shelf life and excellent operational safety, which is the key to the performance of the battery. Lithium-ion battery electrolyte has particularly high requirements on the purity of lithium hexafluorophosphate, and the impurity content in it must be strictly controlled, otherwise it will lead to increased battery internal resistance, rapid battery capacity decay, and reduced safety. However, it is very difficult to obtain high-quality lithium hexafluorophosphate due to the difficulty and harsh conditions of lithium hexafluorophosphate preparat...

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): C01D15/00
CPCC01D15/005C01P2004/60C01P2006/80
Inventor 任建纲张海兵马小红刘海岛杨青陈慧闯章琪
Owner SINOCHEM LANTIAN
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com