In many fields such as medicine, chemical industry, food, and fine chemical industry, ethyl acetate has become a star solvent in the extraction and separation process due to its excellent solubility and relatively low toxicity. However, traditional extraction water washing methods such as stirring kettle combined with static stratification often become bottlenecks in the entire production process: low efficiency, large solvent loss, unstable separation effect, and even potential safety hazards.
Centrifugal extractor is a precision equipment that uses the powerful centrifugal force generated by high-speed rotation to instantly achieve two-phase efficient mixing mass transfer and rapid phase separation. It completely revolutionizes the operation mode of ethyl acetate extraction and water washing.
Ethyl Acetate Extraction and Water Washing Process
1.Feeding: The ethyl acetate extract phase (light phase) containing the target product and the washing water (heavy phase) are continuously and stably fed into the centrifugal extractor according to the preset optimal ratio (such as 1:1) through a metering pump.
2.High-speed mixing and mass transfer: The two-phase liquid enters the mixing area of the machine and is instantly dispersed into extremely fine droplets under the strong shearing effect generated by the high-speed rotation of the rotor, forming a huge mass transfer surface area. Impurities (such as residual acid, alkali, salt, water-soluble pigments, small molecular impurities, etc.) are efficiently transferred from the ethyl acetate phase to the water phase.
3.Centrifugal phase separation: Under the strong centrifugal force, the denser water phase (heavy phase) is quickly thrown to the outer edge of the drum, while the less dense ethyl acetate phase (light phase) gathers on the inside. The two phases are clearly and thoroughly separated in a very short time (usually only a few seconds to tens of seconds).
4.Continuous discharge: The separated pure ethyl acetate phase (light phase) is continuously discharged from the light phase outlet and can directly enter the next process (such as concentration, crystallization) or solvent recovery system. The washed wastewater (heavy phase) is discharged from the heavy phase outlet for subsequent treatment.
5.Multi-stage countercurrent washing: For extremely high washing purity requirements, multiple centrifugal extractors can be connected in series to achieve countercurrent washing. Fresh washing water enters from the last stage and contacts with the ethyl acetate that has undergone preliminary washing. This design maximizes the mass transfer driving force, significantly reduces the amount of washing water, and obtains the highest purity ethyl acetate product.
Core Advantages of Centrifugal Extractor
1.Simple and stable structure: The equipment adopts an upper suspension fulcrum structure without bottom bearings and mechanical seals, and has no risk of leakage.
2.Greatly improve production capacity: The processing volume per unit time is significantly increased to meet the needs of modern large-scale production.
3.Demulsification expert: The strong centrifugal force effectively solves the emulsification problem that is prone to occur in traditional methods, ensuring that the interface between the water phase and the ethyl acetate phase is clear and the separation is thorough.
4.High-purity products: Water washing is more efficient and thorough, significantly reducing the content of water-soluble impurities in the ethyl acetate phase, and improving product quality and stability.
5.High solvent recovery rate: Extremely low solvent entrainment loss (usually <1%), reducing expensive ethyl acetate loss and reducing production costs.
Whether you want to improve the efficiency of existing production lines, reduce overall costs, or meet increasingly stringent environmental and safety requirements, centrifugal extractor is your ideal choice for upgrading your ethyl acetate extraction and washing process. Zhengzhou Tiei Extraction Technology Co., Ltd., as a leader in centrifugal extraction technology, provides a full range of products from laboratory small scale centrifuge to large industrial units. Welcome contact us for more details.
Email: sales@tieiextraction.com
Whatsapp: +86 19069612820
