During pesticide production, the discharged wastewater often contains high concentrations of phthalic acid and other benzene derivatives. This type of wastewater is complex in composition, highly toxic, and poorly biodegradable. Traditional treatment methods are costly and make resource recovery difficult. Nowadays, through solvent extraction technology, we can not only achieve compliant purification of the wastewater but also turn the phthalic acid it contains from waste into valuable resources.

Core Technology

As an organic acid, phthalic acid can exist in molecular form under specific pH conditions. By utilizing the differences in its solubility between different phases, we can select specialized extractants to achieve the following:

  • Precise Capture: The extractant exhibits high selectivity toward phthalic acid molecules, effectively “grabbing” them from complex wastewater.
  • Efficient Enrichment: Using high-performance centrifugal extraction equipment, low concentrations of phthalic acid can be enriched dozens of times in the organic phase.
  • Resource Recovery: The enriched phthalic acid can be recovered through stripping, yielding high purity. It can then be directly reused or sold as a by-product, generating economic benefits.

Centrifugal Extraction Process

The CWL-M Series Centrifugal Extractor, with its unique advantages, perfectly addresses the challenges faced by traditional extraction equipment when treating pesticide wastewater—such as emulsification, difficult phase separation, and low efficiency.

  • 1.Powerful Demulsification and Clear Separation
    Pesticide wastewater has a complex composition and tends to emulsify easily. The ultra-gravity field generated by the centrifuge instantly breaks emulsions, achieving rapid and thorough oil–water separation and eliminating phase carryover problems.
  • 2.High Mass Transfer Efficiency and Rapid Extraction
    The high-speed rotating drum enables instant and thorough mixing of the two liquid phases. The mass transfer efficiency far exceeds that of conventional equipment, with exceptionally high single-stage extraction efficiency, greatly reducing the number of extraction units required.
  • 3.Continuous Operation and Automated Control
    The fully enclosed continuous countercurrent process can seamlessly integrate with existing production lines, enabling automated operation, minimizing manual intervention, and ensuring stable system performance.
  • 4.Strong Durability and Reliable Stability
    Designed specifically for chemical wastewater applications, the equipment is corrosion-resistant and clog-resistant, capable of adapting to fluctuations in pesticide wastewater quality, and ensuring long-term, stable operation.

Tiei Extraction Creates Greater Value for You

  • Economic Benefits: Transform the high cost of wastewater treatment into resource recovery gains, shortening the investment payback period.
  • Environmental Compliance: After pretreatment and recovery of phthalic acid, the wastewater’s COD is significantly reduced, easing the load on subsequent biochemical treatment and ensuring stable compliance of the final effluent.
  • Energy Conservation and Emission Reduction: Achieve internal material recycling, reduce pollutants at the source, and enhance the company’s green and sustainable image.

Welcome contact us for more details
Email: sales@tieiextraction.com
Whatsapp: +86 19069612820