Critical State
One Critical Point, Two Process Foundations
The critical point of CO₂ is 31.1°C and 7.38 MPa. Above both thresholds, CO₂ becomes a homogeneous fluid phase.
Supercritical Drying & Extraction Systems
Equipment and complete systems for supercritical CO2 drying and extraction.
From benchtop sample preparation, aerogels and wafer-scale drying to natural-product and fine-chemical extraction—preserving structure and delivering repeatable results, batch after batch.
- KM-P
- Benchtop R&D and sample prep
- KM-V
- Large-format and small-batch
- KM-S
- 8/12-inch wafer scale
- SiLen
- Supercritical CO2 extraction
01Process
How Supercritical CO₂ Drying and Extraction Work
Drying follows a single-phase CO₂ path to reduce capillary-pressure damage; extraction uses tunable solvent power to extract and separate target compounds.
Drying Path
Exchange Pore Liquid, Then Depressurize Along a Single-Phase Path
An intermediate solvent and liquid CO₂ sequentially replace pore liquid. The system then crosses the critical point and depressurizes slowly to reduce capillary damage.
Extraction Path
Tune Solvent Power, Then Separate by Depressurization
Dense CO₂ dissolves and carries target compounds. Reducing pressure or changing temperature precipitates them while CO₂ is recovered for recirculation.
02Equipment
Four Standard Platforms, from Sample Preparation to Wafer Scale
From benchtop sample preparation and large-format validation to wafer-scale drying and natural-product extraction.
Every platform is delivered with an integrated CO2 pressurization, heat-exchange, separation/recovery and control-interlock architecture.
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02.1
Benchtop Laboratory
KM-P Compact Supercritical Dryer
Bring automated CO2 drying to the laboratory bench, with one-touch programs for most sample workflows.Best for: benchtop R&D, electron-microscopy preparation, aerogels and small micro/nano structures.
View KM-P Details- Sample chamber
- 100–200 mL · 2.5–3.4″
- Operating pressure
- 0–1500 psi
- Operating temperature
- 0–50 °C
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02.2
Small Batch & Pilot
KM-V Vertical Supercritical Dryer
Designed for larger samples and small-batch validation, balancing capacity, recipe management and batch comparison.Best for: larger chambers, 8-inch wafer fixtures or higher-throughput validation.
View KM-V Details- Standard chamber
- 679 / 1162 mL
- Wafers
- 8″ · Quantity by fixture
- Cooling
- Closed-loop cooling · Condensation separation
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02.3
Wafer Production Line
KM-S 12-inch Wafer Drying System
Built for 8/12-inch wafer drying after wet cleaning and for integration into production workflows.Best for: wafer-level cleanliness, automatic vessel lids and site automation interfaces.
View KM-S Details- Vessel lid
- Automatic lift
- Wetted parts
- 316L
- Interfaces
- MES · Evaluated against line takt time
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02.4
Extraction & Pilot
SiLen Deep Blue Supercritical Extraction System
Supercritical CO2 extraction for natural products, food, pharmaceutical intermediates and fine chemicals.Best for: projects requiring configurable extraction vessels, co-solvent dosing, separation vessels and CO2 recovery.
View SiLen Details- Extraction vessel
- 200 mL–3 L · By model
- Pressure
- Vessel rating up to 52 MPa
- Separation
- Single / dual stage · By plan
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02.5 CO2 Supply Booster Pump Temperature Control Separation & Recovery Control Interlocks System Architecture & Integration
CO2 Pressurization and Recovery Modules
Integrates pressurization, heat exchange, condensation/separation, recovery loops and controls around the drying or extraction unit.Best for: integrating pressurization, heat exchange, recovery and interlocks into a standard or custom system.
- Pump train
- High-pressure pump · Co-solvent pump · Back pressure
- Recovery
- Condensation · Separator · Recirculation loop
- Controls
- PLC/HMI · Interlocks · Data interfaces
03Compare
Supercritical Drying and Extraction Equipment Comparison
Choose KM-P, KM-V or KM-S by sample size, batch volume and cleanliness class. Configure SiLen Deep Blue by vessel size, pressure, co-solvent and separation requirements.
| Series | Best fit | Chamber / Vessel | Pressure range | Temperature range | Key configuration |
|---|---|---|---|---|---|
| KM-P | Benchtop laboratory use, SEM/TEM preparation and small samples | 2.5–3.4 inches, 100–200 mL | Operating 0–1500 psi; safety limit 2000 psi | Operating 0–50 °C; safety limit 55 °C | Touchscreen recipes, modular sample chambers; filtration confirmed per configuration |
| KM-V | Small-batch validation, large samples and 8-inch wafer fixtures | KM-V6 approx. 679 mL; KM-V8 approx. 1162 mL; deep-chamber plans confirmed per project | 0–2000 psi | −30–60 °C | Closed-loop cooling, condenser, spacer rings and 8-inch wafer basket; quantity confirmed by chamber and fixture |
| KM-S | 8/12-inch wafers, clean production lines and automation integration | 13-inch chamber, up to 17 L; multi-wafer capacity depends on fixtures | 0–3500 psi | −30–80 °C | Automatic vessel lid, 316L wetted parts, clean filtration and site-interface evaluation |
| SiLen | Natural products, food, pharmaceuticals and fine chemicals | 200 mL integrated unit; configurable 500 mL–3 L vessels, with 1 L-class standard | Vessel rating up to 52 MPa; system pressure confirmed by pump and plan | Published operating window ambient–50°C; some configurations support up to 80°C | Dual-piston and co-solvent pumps, single/dual-stage separation and CO2 recovery configured by plan |
04Engineering
Validated Under Real Process Conditions, from Components to Complete Systems
Large pressure-drop cooling, dry-ice blockage, low-temperature sealing and high-pressure regulation are the most demanding parts of a supercritical system. We design critical components around these conditions, then validate the complete process on the assembled equipment.
Critical Components
In-house Check, Metering and Back-pressure Valves
Precise liquid-CO2 inlet, check-flow and back-pressure control directly protects the sample. These three patented valve designs balance flow direction, fill rate, back-pressure profile and low-temperature seal life across real process windows.
- Sample Chambers & Pressure Vessels Structure and interfaces defined by sample size, media state and process sequence
- 316L Wetted Parts Materials, filtration and fluid-path boundaries confirmed per equipment configuration
- Recipes & Data Logging Key process variables, operating states and alarms can be logged by project
Who We AreBeijing Shian Kelin · KiMax Supercritical Processing
Core Focus
Supercritical CO2 drying, extraction, separation and recovery
Scope
From benchtop preparation to wafer scale; from lab extraction to modular systems
Delivery
Standard platforms, custom modules, process validation and site interfaces confirmed together
05Custom Systems
Custom Engineering Beyond Standard Equipment
The same engineering team supports sample tests and process assessment through design, assembly, commissioning and site delivery. These four needs are common starting points for custom projects.
Need 01
The Chamber or Process Path Must Be Customized
When sample size, batch volume or solvent system exceeds standard chambers, the CO2 supply, pressurization, heat exchange, separation and recovery stages can be engineered to the project.
Need 02
The Standard Pressure-Temperature Window Is Not Enough
Projects that require higher pressure, a wider temperature range or stable operation on a specific profile may need a custom process window.
Need 03
The Equipment Must Integrate with a Production or Clean System
Control logic, data interfaces and materials are defined against the site's MES, alarm and clean-environment boundaries.
Need 04
The Process Medium Is Corrosive or Has Special Requirements
For corrosive gases or liquids, wetted materials, seals and valve control are selected around chemical compatibility and service life.
Delivery Path
One Team, from Sample Testing Through Final Acceptance
We first test the sample on existing equipment, then define the custom scope from the results. The same engineering team carries the project through design, assembly, commissioning, installation and agreed acceptance checks.
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Sample Validation
Run full process cycles on submitted samples to assess the operating window and feasibility.
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Design Review
Review the process architecture, mechanical concept and component list, then confirm the delivery boundary.
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Assembly & Commissioning
Perform and document factory tests for leak tightness, pressure-temperature control, complete cycles and safety interlocks.
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Site Delivery
Engineers install and commission on site, train operators and complete each agreed acceptance item.
06Applications
Typical Applications for Supercritical Drying and Extraction
SEM/TEM Specimen Preparation
Prepare biological samples, gels and delicate structures while reducing collapse and shrinkage.
MEMS, Wafers & Micro/Nano Devices
Damage-minimized drying after wafer wet cleaning, MEMS cantilever release and sensor-structure protection.
Aerogel & Advanced-Material Drying
Reduce pore collapse and cracking in highly porous materials, MOFs and gel systems.
Natural-Product Extraction Development
Screen feedstock size, loading density, pressure-temperature programs and entrainer conditions to assess target yield and selectivity.
Sample Testing & Platform Validation
Validate exchange paths and process windows with actual samples before selecting equipment.
Multistage Separation & Fraction Collection
Collect light, oil and wax fractions across a separation-pressure gradient and compare precipitation order, purity and mass balance.
Frequently Asked Questions
Questions Before You Select a System
Answers to common questions about equipment selection, sample testing, critical point drying and extraction configurations.
How should I choose between the KM-P, KM-V and KM-S supercritical dryers?
KM-P is designed for benchtop R&D and electron-microscopy sample preparation. KM-V handles larger samples, small batches and 8-inch wafer fixtures. KM-S supports 8/12-inch wafers and automated clean-line integration.
How does supercritical drying differ from conventional drying?
Conventional drying creates a liquid–vapor meniscus that can generate capillary pressure. Supercritical CO₂ drying first exchanges the solvent, enters the supercritical region and then depressurizes along a single-phase path, reducing damage to MEMS, aerogels and micro/nano structures.
Can I test samples before choosing equipment?
Yes. First confirm sample size, solvent-exchange method, target structure, throughput and cleanliness requirements, then select the appropriate KM-P, KM-V, KM-S or SiLen configuration.
Can you engineer custom supercritical equipment?
Yes. We can engineer sample chambers, extraction vessels, pressure-temperature windows, CO2 flow paths, separation and recovery, PLC/HMI controls, safety interlocks and site interfaces.
Do you supply supercritical extraction equipment?
Yes. The SiLen Deep Blue system supports natural-product, food, pharmaceutical-intermediate and fine-chemical R&D, with configurations selected by vessel size, pressure range, co-solvent needs and separation stages.
How should samples be prepared before supercritical drying?
Confirm sample size, solvent system, exchange steps, target morphology and cleanliness requirements. For water-containing samples or special solvents, review the exchange path and material compatibility in advance.
Can the equipment support clean configurations and data logging?
Available options include clean filtration, 316L tubing, pressure and temperature trend recording, alarm logs, PLC/HMI controls and data export. Wafer and production-line projects can also include site-interface integration.
What information should I prepare before requesting a recommendation?
Prepare the sample type, dimensions, batch size, solvent state, target morphology, pressure-temperature range, cleanliness class, site interfaces and any custom automation requirements.
Contact
Share Your Sample and Objective to Define the Right System Faster
Tell us the sample type, size, batch volume and cleanliness requirements. For extraction, add the feedstock form, target compounds and throughput. You can also send a sample first and use the results to confirm the process window before selecting equipment.
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