Crystallization Filter Reactor — Nutsche Filter Dryer System for Pharma & Fine Chemical Processing
Xi'an Bioland's Crystallization Filter Reactor integrates reaction, crystallization, filtration, washing, and vacuum drying into a single closed vessel, eliminating yield loss and contamination risks associated with material transfer. The operating temperature range covers −80°C to 250°C, with pressure ranging from full vacuum (1 mbar) to 10 bar. Compliant with GMP/FDA material standards, certified to CE, ISO, UL, and SGS, and with over 200 units delivered across the pharmaceutical, fine chemical, and plant extraction industries.


Key Features & Benefits
Fully Closed "One-Pot" Process
Eliminates the centrifuge and separate dryer — from raw material reaction to dry product discharge, no lid opening or transfer is required throughout the entire process, directly reducing operator exposure risk to toxic intermediates. One piece of equipment completes the validation.
Electropolished Internal Surface (Ra ≤ 0.4µm)
The validated surface roughness value meets biofilm control requirements, supports CIP/SIP automated cleaning validation, and achieves batch-to-batch residue levels compliant with the strictest requirements for aseptic API production.
Multiple Material Options for Corrosive Conditions
Wetted parts are available in SS316L, Hastelloy C-22, Duplex 2205, or PTFE, matched progressively according to solvent corrosiveness — no need to pay material redundancy costs for a general-purpose configuration.
Explosion-Proof & Inerting Protection
Explosion-proof motor (ATEX/Class I Div 1) + ATEX sensors + nitrogen purge interlock, maintaining oxygen concentration below the Lower Explosive Limit (LEL) throughout, suitable for Class A solvents such as n-hexane and acetone.

How It Works?
Step 1 — Reaction & Cooling Crystallization
Materials complete the reaction within the closed vessel. Under nitrogen protection, cooling crystallization occurs, and the target solid precipitates, preventing oxidative side reactions.
Step 2 — In-Situ Filtration
The agitator moves vertically upward, and the filtrate is discharged through the bottom sintered metal mesh plate — no transfer to a centrifuge required.
Step 3 — Rake Scraping & Cake Compaction
The rake agitator rotates and presses downward, leveling and compacting the filter cake layer, eliminating cracks and ensuring uniform penetration during subsequent drying.
Step 4 — Solvent Washing (In-Situ)
The agitator re-suspends the filter cake, and wash solvent flushes away impurities before filtration again — no lid opening, no cross-contamination risk.
Step 5 — Vacuum Drying
Hot gas penetrates and dries through the uniform filter cake layer, reducing residual solvent to target levels — fully enclosed and recordable throughout.
Step 6 — Side Valve Discharge
Dried solid is discharged through the side valve; for viscous or thixotropic products, scraper blades are activated to physically detach material from the vessel wall and mesh plate.

Application Fields
Pharmaceutical API Production
Cooling crystallization, filtration, and solvent washing of APIs such as antibiotics and oncology drugs. The closed design meets OEL occupational exposure limit requirements for HPAPIs.
Fine Chemicals & Agrochemical Intermediates
Corrosion-resistant material configurations support direct switching from high-temperature reaction to solid-liquid separation, recovering catalysts or separating terminal particulate products.
Plant Extraction & CBD Separation
Ethanol extract undergoes freeze wax precipitation, filtration, and heated solvent recovery within the same vessel — winterization process steps reduced by over 50%.
Peptide Synthesis & Chemical Intermediate R&D
Purity control and closed operation at small-to-pilot scale. Has served peptide intermediate projects for multiple CDMO companies.

Why Choose Xi'an Bioland?
- 15 years focused on chemical process equipment manufacturing, with over 200 crystallization filter reactors delivered
- 30 business days custom lead time; standard configurations ship in 5–7 days
- Dedicated production follow-up specialist, weekly photo/video progress updates, final inspection imaging provided before shipment
- OEM/ODM support; engineering team available for application-specific design
- Sea, rail, and air logistics across all channels, supporting global destination delivery

Services & After-Sales Support
- 1-year quality warranty + lifetime maintenance support
- Production weekly reports (photos/videos)
- Remote or on-site FAT optional
- Installation guidance and operation training
- Long-term spare parts supply
- OEM/ODM custom engineering services

Technical Parameters
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MODEL
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BL-FR10L
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BL-FR20L
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BL-FR30L
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BL-FR50L
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BL-FR100L
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Material capacity
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10L
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20L
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30L
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50L
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100L
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Jacket capacity
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≈2L
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≈5L
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≈8L
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≈15L
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≈20L
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Receiving flask
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5L
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10L
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10L
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20L
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20L
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Reactor body and cover
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Apply vacuum grease to the connection surface between the upper part of the kettle body and the kettle cover.
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Variable-frequency governor
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Digital temperature and rotate speed
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Rotate speed
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0-300r/min
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Seal
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Self-lubricating mechanical seal
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Filter base plate
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PTFE filter sand core
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Bore diameter of sand core
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1-200μm (Optional)
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Motor power
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120W/1:3
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200W/1:3
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Power of explosion-proof motor
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180W
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370W
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370W/1:3
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Voltage
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220V/50Hz which can be customized according to customer requirements
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Quality Certifications & Compliance
All equipment undergoes Factory Acceptance Testing (FAT) before dispatch, including:
- Positive Material Identification (PMI) of all wetted parts
- Surface roughness instrument verification (Ra ≤ 0.4µm)
- Riboflavin fluorescence spray ball coverage test
- Helium leak detection (all seals, < 1×10⁻⁶ mbar·l/s)
- Agitator shaft dynamic balance and runout inspection
Customer on-site FAT witnessing or remote video review is supported. Documentation package (including test reports and material certificates) is delivered with the equipment.

FAQ
Q: What are the advantages compared to a "reactor + centrifuge + dryer" three-unit combination?
A: It eliminates two material transfers, typically improving product yield by 3%–8%; cleaning validation is reduced from three pieces of equipment to one; closed operation eliminates open exposure risk to toxic intermediates.
Q: How do you prevent filter cake cracking during the drying stage?
A: The rake agitator simultaneously rotates and presses downward, compacting and leveling the cake surface to ensure uniform hot gas penetration and eliminate channeling.
Q: What is the service life of the sintered metal mesh plate?
A: Designed service life of several years or more. Backflushing and ultrasonic cleaning are supported to restore flux without removal or replacement.
Q: Can it handle flammable solvents such as n-hexane and acetone?
A: Yes. Explosion-proof components (ATEX/Class I Div 1) + nitrogen inerting system maintain oxygen concentration below LEL throughout.
Q: How is batch-to-batch cross-contamination controlled?
A: Closed design + automated CIP/SIP programs eliminate material accumulation dead zones in piping and valves found in multi-equipment configurations.
Q: What parameters can be customized?
A: Material (SS316L/Hastelloy/PTFE/titanium), pore size (1–50µm), temperature range, pressure rating, drive type, PLC automation level, and volume — all configurable on demand, with OEM/ODM support.
Contact Us
Have questions about Crystallization Filter Reactor? Email us at info@biolandequip.com — we respond within 24 hours.