Bag Lifting Centrifuge for Chiral Intermediate Crystal Recovery

The Bag Lifting Centrifuge is designed for batch recovery, washing, dewatering, and clean discharge of high-value chiral intermediate crystals.

It is suitable for fine chemical and pharmaceutical-intermediate crystallization processes where product loss, mother liquor carryover, cross-contamination risk, and manual cake removal need to be controlled. Instead of scraping the crystal cake from the basket wall, the centrifuge uses an integrated filter bag lifting arrangement to remove the complete cake more cleanly.

• Chiral intermediate crystal recovery
• Fine chemical intermediate separation
• Pharmaceutical intermediate crystallization
• Optical active compound dewatering
• High-value organic crystal washing
• Mother liquor removal before vacuum drying
• Crystal recovery after reaction crystallization
• Purification of specialty chemical crystals
• Batch production with product-changeover requirements

Peony provides the batch solid-liquid separation section between crystallization and downstream drying or packaging.

Crystallizer → Slurry Holding Tank → Controlled Feed → Bag Lifting Centrifuge → Mother Liquor Collection / Recovery → Optional Cake Washing → Spin Drying → Filter Bag Lifting → Vacuum Dryer / Tray Dryer / Packaging

Peony can provide:

• Bag lifting centrifuge matched to crystal condition and batch capacity
• Filter bag material and micron rating selection based on particle size and fines content
• Controlled slurry feeding for stable cake formation
• Optional low-loss cake washing to reduce residual mother liquor
• Separate mother liquor and wash liquor collection for recovery or reuse
• Cleanable product-contact configuration and optional CIP connection
• PLC batch control with feeding, washing, drying, and discharge sequences
• Connection to vacuum dryers, filters, conveyors, and packing systems

1. Controlled Slurry Feeding

Chiral intermediate crystal slurry enters the rotating basket through a controlled feed system.

Stable feeding helps form an even crystal cake and reduces unnecessary crystal breakage.

2. Mother Liquor Separation

Under centrifugal force, mother liquor passes through the filter bag and basket perforations.

The filtrate can be collected for solvent recovery, mother liquor recycle, re-concentration, or further treatment.

3. Crystal Cake Formation

The crystals remain inside the filter bag and gradually form a filter cake.

Filter bag selection is matched to crystal size, fines content, filtrate clarity requirements, and solvent compatibility.

4. Optional Cake Washing and Spin Drying

A controlled wash step can reduce residual mother liquor and soluble impurities. The basket then continues rotating to reduce free liquid in the cake before discharge.

5. Filter Bag Lifting Discharge

After the batch cycle, the full filter bag is lifted for crystal discharge. This avoids manual scraping from the basket wall and helps reduce product retention inside the machine.

Please provide:

• Product name and crystal composition
• Crystal size distribution and fines content
• Slurry solids concentration
• Mother liquor or solvent composition
• Separation temperature
• Required batch capacity and production output
• Target cake moisture
• Cake washing requirement
• Solvent recovery or mother liquor recycle arrangement
• Required product-contact material
• Cleaning or CIP requirement
• Downstream dryer and handling arrangement

Peony welcomes distributor and agent cooperation with fine chemical manufacturers, pharmaceutical intermediate producers, crystallization contractors, solvent recovery companies, and industrial separation partners.

We support partners with centrifuge selection, filter bag matching, cake washing design, product-contact material configuration, mother liquor and solvent recovery connection, installation guidance, commissioning support, spare parts, and after-sales service.

Send us your target market, customer type, project background, crystal properties, solvent system, batch capacity, washing requirement, and downstream handling arrangement. Our engineering team will help develop a suitable Bag Lifting Centrifuge solution and cooperation proposal.