In fine chemical production, it is sometimes necessary to remove DMF from dichloromethane aqueous feed (loaded product). This production section is called the stripping section and requires the use of stripping equipment. The stripping equipment is functionally the same as the extraction equipment.

At present, many chemical manufacturers still use traditional kettle-type extraction and separation devices, and reactor adopts intermittent production, which is time-consuming and labor-intensive. More chemical plants have put forward higher requirements for extraction equipment. Continuous, large-scale, and modern extraction and separation equipment are increasingly recognized and sought after by customers.

Zhengzhou TIEI Extraction Company introduced a continuous centrifugal extraction process to the market in response to the difficulties of intermittent production in chemical plants. This process has the advantages of obvious extraction effect, fast separation speed, and high extraction efficiency. Moreover, this process is equipped with a zirconium wire electrostatic extraction device, which can promptly eliminate safety hazards caused by static electricity. In response to the treatment needs of dichloromethane to remove DMF, Zhengzhou TIEI has provided a complete treatment process:

  1. Washing
    The DMF water-soluble impurities in the aqueous feed are extracted and washed by adding water. The DMF and water-soluble impurities in the aqueous feed are transferred to the water phase, ultimately achieving the purpose of purifying the original solution.
  2. Recycling
    After the washing water passes through the two-stage countercurrent section, it not only removes water-soluble impurities, but also takes away some products. At this time, it is necessary to use dichloromethane in the recovery section to extract and recover the "water phase entrained with the product" in the wash water to achieve product recovery.

It is worth mentioning that during the washing stage, by adjusting the pump flow meter of the centrifugal extraction machine, accurate measurement of the aqueous feed and washing water can be achieved, thereby controlling the ratio and flow of the feed to achieve the best washing effect.

So, what are the advantages of the new CWL-M centrifugal extractor compared with traditional reactors?

  1. The centrifugal extraction system occupies a small area and has a large processing capacity.
  2. The centrifugal extraction system is a closed circulation system and has a good operating environment.
  3. The centrifugal extraction equipment has low power consumption (CWL350-M model has a power of 2.2Kw), which can reduce production costs.
  4. Centrifugal equipment can realize continuous operation and greatly reduce manpower investment.
  5. The solvent loss is small, saving investment in subsequent work sections.

The centrifugal extractor launched by Zhengzhou TIEI Extraction has high quality, low power consumption, no wearing parts, and can withstand corrosion from various strong acids and alkalis. It has been praised by hundreds of customers across the country and has become a veritable "mixing and separation expert" .