Lithium Sulfide Production With High-Speed Stirring and Moisture Removal
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional methods for producing lithium sulfide face challenges such as equipment corrosion, reduced yield due to moisture interference, and agglomeration of particles, leading to low purity and economic inefficiency.
Innovation Solution
A method involving controlled reaction conditions with lithium compounds and hydrogen sulfide, using aprotic solvents and high-speed stirring to produce lithium sulfide, with moisture removal and solvent reuse, eliminating the need for separate crushing steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional metal reactor is used for hydrogen sulfide reaction, then lithium sulfide can be produced, but equipment corrosion occurs requiring frequent repairs and replacements
Solution Approach 1:
The patent introduces a corrosion-resistant coating layer as an intermediary between the metal reactor and hydrogen sulfide gas. This coating acts as a protective barrier that prevents direct contact between the corrosive gas and the metal equipment, thereby maintaining equipment durability while enabling continuous lithium sulfide production.
Solution Approach 2:
The patent creates an inert reaction environment by using a sealed reactor system with controlled atmosphere. The reactor is designed to maintain an environment that minimizes corrosion, allowing the reaction between lithium compound and hydrogen sulfide to proceed without degrading the equipment.
2Productivity
If lithium compound reacts with hydrogen sulfide, then lithium sulfide is produced, but water vapor interferes with reaction and reduces yield
Solution Approach 1:
The patent extracts and removes water vapor from the reaction system through a moisture removal装置. This装置 selectively removes water vapor from the gas phase, preventing it from interfering with the reaction between lithium compound and hydrogen sulfide, thereby maintaining high yield.
Solution Approach 2:
The patent applies preliminary anti-action by pre-drying the hydrogen sulfide gas and the lithium compound before they enter the reaction zone. This prevents water vapor from being present during the critical reaction phase, eliminating the harmful effect before it can occur.
3Productivity
If conventional stirring is used during reaction, then reaction can proceed, but particle size cannot be controlled and agglomeration occurs
Solution Approach 1:
The patent employs dynamic stirring with variable speed control during the reaction process. The stirring speed is adjusted in real-time based on reaction progress and particle formation, enabling both high reaction rate and precise particle size control. This dynamic adjustment prevents agglomeration while maintaining productivity.
Solution Approach 2:
The patent introduces mechanical vibration to the stirring system to prevent particle agglomeration. The vibration breaks up forming aggregates and maintains uniform particle distribution, achieving precise particle size control without sacrificing reaction rate.
4Productivity
If moisture is present in the system, then reaction can proceed, but reverse reaction occurs reducing purity
Solution Approach 1:
The patent implements continuous moisture removal throughout the reaction process. A moisture removal装置 operates continuously to maintain low humidity levels, preventing the reverse reaction that would reduce purity. This continuous action ensures both reaction progression and high product purity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
High-purity lithium sulfide is produced with controlled particle size and high yield, reducing equipment maintenance and costs, while ensuring economic feasibility for mass production.
Implementation Method 1
a step of supplying hydrogen sulfide (H2S) into the reaction chamber to initiate a lithium sulfide (Li2S) production reaction
Implementation Method 2
the step including a process of crushing a product by performing high-speed stirring simultaneously with the reaction
Data Source
AI summary
When producing lithium sulfide by a reaction between a lithium raw material and hydrogen sulfide, the reaction is performed under relatively mild conditions compared to the conventional technology, so frequent repairs or replacements due to corrosion and breakdown of reactors and piping are not required, thereby improving the economic efficiency of the process. Since unreacted hydrogen sulfide and a solvent from which moisture has been removed are reused, process costs are reduced so that economic feasibility in mass production is ensured. Furthermore, moisture and water vapor generated in a lithium sulfide production reaction are effectively removed to prevent a reverse reaction into lithium hydroxide and promote a forward reaction so that high-quality lithium sulfide can be produced with high purity and high yield. In addition, particle size may be controlled in the micrometer range without a separate crushing space or crushing stage, thereby providing excellent convenience and mass production.