In industries such as chemicals, pharmaceuticals, and food processing, ethyl acetate is an important organic solvent, and its effective separation from water has long been a critical technical step. Although traditional separation methods such as distillation are widely used, challenges including high energy consumption, susceptibility to emulsification, and poor recovery efficiency at low concentrations have led an increasing number of enterprises to seek more efficient and cost-effective solutions. Liquid liquid extraction, particularly approaches based on centrifugal extraction technology, provides a highly efficient solution to this challenge.
Core Process Principle: Liquid Liquid Extraction
The application of centrifugal extraction technology in this process is based on the principle of liquid liquid extraction.
- Target compound: Ethyl acetate dissolved or dispersed in the aqueous phase (wastewater).
- Extractant: An organic solvent with very low miscibility with water and strong solubility for ethyl acetate is selected. Commonly used extractants include dichloromethane, n-hexane, toluene, or fresh ethyl acetate itself (used for enrichment).
- Principle: By exploiting the difference in the partition coefficient of ethyl acetate between the organic extractant and the aqueous phase, the two phases are brought into thorough contact and mixing, allowing the majority of ethyl acetate to transfer from the aqueous phase into the organic phase.
- Key equipment: Centrifugal extractor. It uses the strong centrifugal force generated by high-speed rotation (hundreds to thousands of times gravity) to rapidly mix and then quickly separate two immiscible liquid phases with different densities, thereby completing the mass transfer process.
CWL-M Series Centrifugal Extractor: The High-Efficiency Engine of Extraction Technology
Among the many types of extraction equipment, the centrifugal extractor has become one of the preferred choices for modern chemical separation due to its distinctive advantages. The CWL-M series centrifugal extractor independently developed by Zhengzhou Tiei Extraction further elevates the performance of this technology to a new level.
Technical Advantages:
- High-Efficiency Mass Transfer and Rapid Phase Separation
Centrifugal extractor utilizes centrifugal force generated by high-speed rotation to significantly enhance the mixing and separation processes. Compared to traditional extraction columns, the residence time is reduced to seconds, mass transfer efficiency is improved by more than 30%, and the single-stage extraction rate can reach over 90%. - Continuous Operation with Automated Control
Centrifugal extractor operates continuously in a fully enclosed system, meeting the demands of modern chemical continuous and automated production. The intelligent control system monitors operating parameters in real time, ensuring process stability. - Strong Adaptability and Wide Processing Range
Whether handling systems with high or low phase ratios (organic phase to aqueous phase), materials prone to emulsification, the centrifugal extractor operates reliably, effectively avoiding blockages and the accumulation of emulsion layers. - Compact Design, Energy Saving, and Environmentally Friendly
The compact structure requires only one-third to one-fifth of the footprint of traditional equipment. Enclosed operation eliminates solvent volatilization, reducing material losses and environmental pollution. Energy consumption is reduced by 20–40% compared with conventional methods.
By integrating highly efficient liquid liquid mass transfer with extremely strong centrifugal separation capability, the centrifugal extractor provides a fast, efficient, continuous, and automated solution for ethyl acetate separation. It is particularly well suited for treating wastewater systems that are prone to emulsification and difficult to separate, demonstrating outstanding performance in improving recovery efficiency, reducing operating costs, and ensuring production safety as well as environmental compliance. As a result, it has become one of the core pieces of equipment for solvent extraction and wastewater pretreatment in modern chemical, pharmaceutical, and related industries.
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