1. Dehydration Column: Removing Moisture to Ensure Process Purity

The Dehydration Column is designed to remove water from solvent mixtures, ensuring the solvent meets the required dryness and purity standards.

Its operation is typically based on distillation or stripping principles, using the difference in boiling points between water and organic solvents to achieve efficient separation.

It is commonly applied in:

• Drying solvents prior to polymerization or synthesis;

• Purification of intermediates in fine chemicals;

• Regeneration of alcohols, ketones, and other solvents in pharmaceuticals and agrochemicals.

By eliminating moisture, the dehydration column prevents unwanted side reactions and improves overall process reliability.

2. Heavy Component Removal Column: Deep Purification from High-Boiling Impurities

The Heavy Component Removal Column is used to separate and remove high-boiling point impurities from recycled solvents — such as polymer residues, by-products, oils, or heavy organics.

Like the dehydration column, it relies on distillation, but is focused on removing heavier fractions that cannot be separated in early stages.

Key applications include:

• Solvent purification after extraction;

• Post-polymerization solvent recycling;

• Treatment of complex solvent streams containing oils, heavy metals, or viscous residues.

The result is a regenerated solvent that closely matches its original purity, ready for reuse in demanding applications.

3. A Powerful Duo: Integrated Operation for Maximum Efficiency

In most solvent recovery systems, dehydration and heavy component removal columns are integrated and operate sequentially, forming a closed-loop purification process:

1. The dehydration column removes water content from the spent solvent;

2. The heavy component removal column eliminates heavier contaminants;

3. The final product is a clean, reusable solvent that meets process requirements.

This tandem setup not only improves solvent recovery efficiency, but also contributes to significant cost savings and sustainable production

4. Case Study: High-Efficiency Delivery for YuHuang Chemical

In a custom solvent recovery project for YuHuang Chemical, our team delivered a complete system featuring a dehydration column and a heavy component removal column — achieving a remarkable "same-year design, manufacturing, and commissioning" cycle.

Once operational, the system exceeded performance expectations with:

• Stable long-term operation;

• High recovery efficiency;

• Notable cost reduction for the client;

• Positive environmental impact through solvent reuse.

This case exemplifies our technical expertise and rapid delivery capabilities in solvent purification solutions.

5. Conclusion: Technology-Driven, Sustainability-Oriented

As the global chemical industry moves toward greener and more sustainable operations, efficient solvent recovery becomes a key driver of environmental performance and economic efficiency.

The Dehydration Column and Heavy Component Removal Column are indispensable technologies in this transformation — ensuring that solvents can be reused, emissions reduced, and production costs minimized.

Whether your process involves extraction, reaction, or polymerization, we offer tailor-made solutions to meet your unique needs. Contact us today to explore how we can help optimize your solvent recovery system and unlock new potential for your operations.