Physical Flotation vs. Acid Leaching: An In-Depth Comparative Analysis of Molybdenum Disulfide Purification Technologies
2026-04-18
Molybdenum disulfide (MoS₂), as an important solid lubricant, has its product quality and application fields directly determined by its purification process. Currently, there are two main purification routes for MoS₂: the traditional acid leaching method and the emerging physical flotation method. This paper conducts an in-depth comparative analysis from multiple dimensions, including technical principles, product quality, and environmental performance.
I. Comparison of Technical Principles
Acid leaching is a traditional purification process for Molybdenum disulfide, which works by using strong acids (such as hydrochloric acid and sulfuric acid) to react with impurity minerals and dissolve and remove them. Although this method can effectively remove most impurities, it leaves behind residual acid anions and causes severe corrosion of equipment.
Physical flotation is a mineral processing technique based on the differences in the physicochemical properties of mineral surfaces. The cyclonic selective concentration method independently developed by Thriving (Chaoyang) New Materials Co., Ltd. achieves effective separation of molybdenum disulfide from impurity minerals by controlling the pH of the slurry, the reagent regime, and the flotation process. This process does not require the use of strong acids, thereby eliminating acid residue at the source.
II. Product Quality Comparison
1. Purity Index: The purity of products obtained by acid leaching typically ranges from 97% to 98%, whereas those produced by physical flotation can achieve a purity of ≥99%.
2. Chloride ion content: The chloride ion content of products obtained by acid leaching typically ranges from 500 to 1,000 ppm, whereas that of products obtained by physical flotation is less than 10 ppm, a difference of 50- to 100-fold.
3. Crystal structure integrity: The physical flotation method fully preserves the layered crystal structure of Molybdenum disulfide.
III. Comparison of Environmental Performance
The entire physical flotation process does not involve strong acids, making the wastewater easy to treat and aligning with the principles of green manufacturing.
IV. Differences in Application Areas
Physicochemical flotation products are widely used in aerospace, semiconductor manufacturing, new-energy vehicles, high-end lubricating greases, and other fields.
V. Cost-Benefit Analysis
The physical flotation method offers a more competitive life-cycle cost.
VI. Industry Development Trends
Thriving (Chaoyang) New Materials Co., Ltd., as the only domestic enterprise mastering the physical flotation purification technology, has built a production line with an annual output of 1,000 tons of high-purity molybdenum disulfide.
VII. Recommendations for Selection
For applications that demand high quality, low corrosion, and long service life, it is recommended to give priority to non-acid-leached Molybdenum disulfide products produced by the physical flotation method.
SEO tags: #Molybdenum disulfide #Physical flotation method #Acid leaching method #Purification technology #Non-acid leaching molybdenum disulfide #High-purity molybdenum disulfide #Chloride ion content #Green manufacturing #Thriving (Chaoyang) New Materials #Solid lubricant
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