In fine chemical production processes, the water washing stage is a critical step for removing impurities from the organic phase and ensuring product purity. However, many enterprises still rely on traditional reactors or mixer-settlers for batch water washing operations, which commonly face issues such as low processing efficiency, long batch cycle times, high water consumption, and persistent emulsion layers that are difficult to break. With increasing pressure on production capacity and stricter environmental requirements, the continuous transformation of the water washing stage has become an urgent technical upgrade priority for fine chemical manufacturers.
Based on the CWL-M series centrifugal extractor, Zhengzhou Tiei Extraction has developed a dedicated continuous water washing solution tailored to the characteristics of fine chemical water washing processes. Centered on the design concept of “efficient mass transfer – rapid phase separation – stable and controllable operation,” this solution helps enterprises overcome the process bottlenecks of traditional batch water washing, enabling a significant efficiency leap from hour-level processing to minute-level operation.
Technical Principle: Reconstructing Two-Phase Mass Transfer in a Centrifugal Force Field
The CWL-M centrifugal extractor utilizes the strong centrifugal force field generated by high-speed rotation to enable thorough mixing of the organic phase and wash water at the micron scale, improving mass transfer efficiency by 5–8 times compared with conventional mechanical agitation. The mixed liquid completes phase separation within milliseconds, forming a clear and stable interface between the light and heavy phases, fundamentally suppressing emulsion entrainment. A single unit can achieve single-stage or multi-stage countercurrent water washing, with a process that is continuous, sealed, and fully automated.
Process Advantages: Seven-Dimensional Breakthrough Defining a New Standard for Water Washing
1.Efficiency Leap: Single-stage processing time is reduced to 1–3 minutes, more than 10× faster than traditional reactors.
2.Significant Water Savings: Countercurrent contact design reduces wash water consumption by 30%–50%.
3.Stable Product Quality: Controllable phase interface eliminates interphase entrainment, improving batch-to-batch purity consistency.
4.Continuous Operation: Supports 24-hour uninterrupted operation, matching automated production line rhythms.
5.Space Saving: Equipment footprint is only 1/5–1/3 of conventional processes.
6.Material Compatibility: Fluoropolymer materials, stainless steel, or polymer composite materials can be selected according to material corrosiveness.
7.Flexible Capacity Expansion: Modular design supports a full processing capacity range of 1–50 m³/h.
Typical Applications: Proven Reliability Across Multiple Water Washing Scenarios
1.Water Washing After Acid Neutralization: A pesticide intermediate manufacturer replaced three batches of traditional reactor-based water washing with a three-stage countercurrent centrifugal extraction process. Wash water consumption was reduced by 45%, while the salt content in the organic phase decreased from 8% to below 200 ppm. The system operated continuously for 6,000 hours without emulsion layer accumulation.
2.Deep Water Washing After Alkaline Treatment: An active pharmaceutical ingredient (API) manufacturer processing amine-containing organic phases previously required 90 minutes per batch. After upgrading to the CWL150-M centrifugal extractor, the processing capacity reached 3 m³/h, with outlet water pH stabilized at 6.5–7.5, and manual intervention reduced by 80%.
3.Solvent Displacement Water Washing: A polymer materials manufacturer adopted the CWL350-M centrifugal extractor to perform DMAC solvent displacement water washing. The organic phase recovery rate increased to 99.2%, while wastewater COD was reduced by 60%, enabling efficient separation of solvent and water.
Selection Support: Experiment First, Data-Driven Decisions
To help customers accurately match process requirements, Zhengzhou Tiei Extraction provides comprehensive validation services for water washing processes. Customers can supply real process materials to conduct parameter optimization—such as phase ratio, rotational speed, and number of stages—on the CWL-M laboratory model, obtaining a complete process report and equipment selection recommendations to minimize decision-making risks.
Service Commitment: Full-Process Engineering Support
From process diagnosis and laboratory testing to equipment integration and on-site commissioning, the Tiei Extraction technical team delivers customized water washing upgrade solutions. We not only supply equipment, but also aim to become a long-term strategic partner for fine chemical enterprises in their transition toward continuous production.
Email: sales@tieiextraction.com
Whatsapp: +86 19069612820
