SFT Supercritical CO₂ Dyeing System
| Brand | SFT |
|---|---|
| Origin | USA |
| Manufacturer Type | Authorized Distributor |
| Product Category | Imported Equipment |
| Model | Supercritical CO₂ Dyeing System |
| Price | USD $300,000 |
| Max Operating Temperature | 150 °C |
| Channel Configuration | Customizable |
| Extraction Vessel Volume Range | 5 mL – 8000 mL |
| Maximum Pressure | 10,000 psi |
| CO₂ Flow Control Range | 0–2500 RPM (via integrated magnetic drive agitator) |
| Applicable Matrices | Botanical extracts, natural dyes, pharmaceutical actives, functional textiles |
Overview
The SFT Supercritical CO₂ Dyeing System is a fully automated, bench- to pilot-scale platform engineered for precision dyeing, impregnation, and functional finishing of natural and synthetic fibers using supercritical carbon dioxide (scCO₂) as the solvent medium. Unlike conventional aqueous or organic solvent-based dyeing processes, this system leverages the tunable solvation power, near-zero surface tension, and rapid mass transfer kinetics of scCO₂—operating above its critical point (31.1 °C, 1070 psi)—to achieve uniform dye penetration without hydrolysis, thermal degradation, or post-processing wastewater generation. The system integrates a high-pressure fluid handling architecture with real-time thermodynamic control, enabling reproducible process development aligned with green chemistry principles and regulatory expectations for sustainable textile processing.
Key Features
- Electric dual-piston CO₂ pump with proprietary slow-intake/fast-delivery mechanism—ensures stable flow delivery under both constant-pressure and constant-flow operation modes.
- Integrated electronic cooling system maintains pump head temperature below −4 °C, eliminating dependency on external chillers or compressed air sources.
- Independent PID-controlled thermal zones: reaction vessel wall, dynamic/static valve bodies, and preheating ring—each regulated to ±0.5 °C accuracy.
- Pressure regulation stability within ±1–2 psi during constant-pressure mode; flow resolution down to 0.01 mL/min in constant-flow mode.
- Modular vessel configuration: standardized reactor volumes from 5 mL to 8000 mL, constructed from ASTM A182 F22 stainless steel with ASME Section VIII Div. 1 certification.
- Comprehensive safety architecture: rupture disk assembly, pressure relief valve, acoustic alarm system, emergency depressurization circuit, and redundant pressure transducers.
- Optional magnetic-drive agitation (Dyna/Mag™): torque-rated at 16 in-lbs, speed-controllable from 0–2500 RPM, compatible with Gaspersinator™ axial-flow impellers and custom blade geometries.
- Optional sapphire viewport rated for continuous operation at 150 °C and 10,000 psi—enabling in situ visual monitoring of phase behavior and dye dispersion dynamics.
Sample Compatibility & Compliance
The system accommodates solid-phase substrates including wool, silk, polyester, cellulose acetate, and biodegradable polymer fibers, as well as powdered botanical matrices (e.g., curcumin, anthocyanin-rich plant extracts) and low-volatility dye precursors. Vessel internals are electropolished to Ra < 0.4 µm to minimize adsorption and ensure cleaning validation per ISO 14644-1 Class 5 cleanroom protocols. All pressure-retaining components comply with PED 2014/68/EU and ASME B31.3 process piping standards. Software controls support audit trails and electronic signatures compliant with FDA 21 CFR Part 11 requirements when configured with validated firmware.
Software & Data Management
The embedded controller features a 10.1″ capacitive touchscreen HMI running a deterministic real-time OS. Process sequences—including ramp/soak profiles, multi-step pressure transitions, and synchronized agitation schedules—are programmable via intuitive drag-and-drop workflow builder. All sensor inputs (temperature, pressure, flow, RPM) are timestamped and logged at ≥1 Hz resolution to internal SSD storage. Export formats include CSV, PDF reports, and XML metadata bundles compatible with LIMS integration. Optional remote monitoring via TLS-secured Ethernet enables secure off-site supervision while maintaining local data sovereignty.
Applications
- Development of waterless textile dyeing protocols for high-value apparel and technical fabrics.
- Encapsulation of heat-sensitive natural colorants into fiber matrices without covalent modification.
- Functionalization of medical-grade textiles with antimicrobial agents (e.g., chitosan derivatives, silver nanoparticles).
- Extraction-dyeing tandem processes: simultaneous isolation and fixation of polyphenolic dyes from agricultural byproducts.
- Stability testing of dye-fiber binding under accelerated aging conditions (elevated T/P cycling).
- Process optimization studies supporting ISO 14040/14044 life cycle assessment (LCA) of sustainable dyeing technologies.
FAQ
What utilities are required for installation?
A single-phase 220 V / 50 Hz power supply, dedicated exhaust ventilation rated for CO₂ discharge (≥15 ACH), and certified food-grade or research-grade CO₂ cylinders (≥99.995% purity) are mandatory. No compressed air or external refrigeration is needed.
Is the system suitable for GLP-compliant method development?
Yes—when equipped with Part 11-compliant firmware and calibrated transducers traceable to NIST standards, the system supports full audit trail generation, user access control, and electronic record retention meeting OECD GLP principles.
Can the system be used for extraction only, without dyeing?
Absolutely—the platform operates identically as a supercritical fluid extractor (SFE); vessel design, pressure/temperature range, and CO₂ delivery performance fully satisfy ASTM D7675 and ISO 18433-2 criteria for botanical and lipid extraction.
What maintenance intervals are recommended?
Preventive maintenance is scheduled every 500 operational hours or annually—whichever occurs first—including O-ring replacement, transducer calibration verification, and pump lubrication per SFT Technical Bulletin TB-SCD-07.
